This paper presents a new bio-inspired heuristic optimization algorithm called the Wolf Search Algorithm (WSA) for solving the multi-objective reactive power dispatch problem. Wolf Search algorithm is a new bio – inspired heuristic algorithm which based on wolf preying behaviour. The way wolves search for food and survive by avoiding their enemies has been imitated to formulate the algorithm for solving the reactive power dispatches. And the speciality of wolf is possessing both individual local searching ability and autonomous flocking movement and this special property has been utilized to formulate the search algorithm .The proposed (WSA) algorithm has been tested on standard IEEE 30 bus test system and simulation results shows clearly about the good performance of the proposed algorithm .
Passerine swarm optimization algorithm for solving optimal reactive power dis...IJAAS Team
This paper presents Passerine Swarm Optimization Algorithm (PSOA) for solving optimal reactive power dispatch problem. This algorithm is based on behaviour of social communications of Passerine bird. Basically, Passerine bird has three common behaviours: search behaviour, adherence behaviour and expedition behaviour. Through the shared communications Passerine bird will search for the food and also run away from hunters. By using the Passerine bird communications and behaviour, five basic rules have been created in the PSOA approach to solve the optimal reactive power dispatch problem. Key aspect is to reduce the real power loss and also to keep the variables within the limits. Proposed Passerine Swarm Optimization Algorithm (PSOA) has been tested in standard IEEE 30 bus test system and simulations results reveal about the better performance of the proposed algorithm in reducing the real power loss and enhancing the static voltage stability margin.
Voltage Stability Investigation of the Nigeria 330KV Interconnected Grid Syst...Onyebuchi nosiri
ABSTRACT: Voltage stability investigation of the Nigeria 330kV grid Power Network was carried out using Eigenvalues method. The power system Jacobian matrix was derived using Newton-Raphson power flow solution iterative method to determine the eigenvalues for the voltage stability evaluation of both the existing 28-bus and improved 52-bus Nigeria 330kV power networks. Positive and negative eigenvalues quantifying the power system voltage stability were identified. For a steady state power system, positive and negative eigenvalues showed stable and unstable systems respectively. The eigenvalues voltage stability method was developed, formulated and implemented on the existing 28-bus and proposed improved 52-bus Nigeria 330kV power networks. The various eigenvalues, eigenvectors, participation factors and weak buses contributing to system voltage instability were determined using Matlab/SIMULINK Power System Analysis Toolbox (PSAT) for these power networks.
Voltage Profile Enhancement and Reduction of Real Power loss by Hybrid Biogeo...ijeei-iaes
This paper presents Hybrid Biogeography algorithm for solving the multi-objective reactive power dispatch problem in a power system. Real Power Loss minimization and maximization of voltage stability margin are taken as the objectives. Artificial bee colony optimization (ABC) is quick and forceful algorithm for global optimization. Biogeography-Based Optimization (BBO) is a new-fangled biogeography inspired algorithm. It mainly utilizes the biogeography-based relocation operator to share the information among solutions. In this work, a hybrid algorithm with BBO and ABC is projected, and named as HBBABC (Hybrid Biogeography based Artificial Bee Colony Optimization), for the universal numerical optimization problem. HBBABC merge the searching behavior of ABC with that of BBO. Both the algorithms have different solution probing tendency like ABC have good exploration probing tendency while BBO have good exploitation probing tendency. HBBABC used to solve the reactive power dispatch problem and the proposed technique has been tested in standard IEEE30 bus test system.
Hybrid Quantum Genetic Particle Swarm Optimization Algorithm For Solving Opti...paperpublications3
Abstract: This paper presents hybrid particle swarm algorithm for solving the multi-objective reactive power dispatch problem. Modal analysis of the system is used for static voltage stability assessment. Loss minimization and maximization of voltage stability margin are taken as the objectives. Generator terminal voltages, reactive power generation of the capacitor banks and tap changing transformer setting are taken as the optimization variables. Evolutionary algorithm and Swarm Intelligence algorithm (EA, SI), a part of Bio inspired optimization algorithm, have been widely used to solve numerous optimization problem in various science and engineering domains. In this paper, a framework of hybrid particle swarm optimization algorithm, called Hybrid quantum genetic particle swarm optimization (HQGPSO), is proposed by reasonably combining the Q-bit evolutionary search of quantum particle swarm optimization (QPSO) algorithm and binary bit evolutionary search of genetic particle swarm optimization (GPSO) in order to achieve better optimization performances. The proposed HQGPSO also can be viewed as a kind of hybridization of micro-space based search and macro-space based search, which enriches the searching behavior to enhance and balance the exploration and exploitation abilities in the whole searching space. In order to evaluate the proposed algorithm, it has been tested on IEEE 30 bus system and compared to other algorithms.
Keywords: quantum particle swarm optimization, genetic particle swarm optimization, hybrid algorithm Optimization, Swarm Intelligence, optimal reactive power, Transmission loss.
Reduction of Active Power Loss byUsing Adaptive Cat Swarm Optimizationijeei-iaes
This paper presents, an Adaptive Cat Swarm Optimization (ACSO) for solving reactive power dispatch problem. Cat Swarm Optimization (CSO) is one of the new-fangled swarm intelligence algorithms for finding the most excellent global solution. Because of complication, sometimes conventional CSO takes a lengthy time to converge and cannot attain the precise solution. For solving reactive power dispatch problem and to improve the convergence accuracy level, we propose a new adaptive CSO namely ‘Adaptive Cat Swarm Optimization’ (ACSO). First, we take account of a new-fangled adaptive inertia weight to velocity equation and then employ an adaptive acceleration coefficient. Second, by utilizing the information of two previous or next dimensions and applying a new-fangled factor, we attain to a new position update equation composing the average of position and velocity information. The projected ACSO has been tested on standard IEEE 57 bus test system and simulation results shows clearly about the high-quality performance of the planned algorithm in tumbling the real power loss.
Passerine swarm optimization algorithm for solving optimal reactive power dis...IJAAS Team
This paper presents Passerine Swarm Optimization Algorithm (PSOA) for solving optimal reactive power dispatch problem. This algorithm is based on behaviour of social communications of Passerine bird. Basically, Passerine bird has three common behaviours: search behaviour, adherence behaviour and expedition behaviour. Through the shared communications Passerine bird will search for the food and also run away from hunters. By using the Passerine bird communications and behaviour, five basic rules have been created in the PSOA approach to solve the optimal reactive power dispatch problem. Key aspect is to reduce the real power loss and also to keep the variables within the limits. Proposed Passerine Swarm Optimization Algorithm (PSOA) has been tested in standard IEEE 30 bus test system and simulations results reveal about the better performance of the proposed algorithm in reducing the real power loss and enhancing the static voltage stability margin.
Voltage Stability Investigation of the Nigeria 330KV Interconnected Grid Syst...Onyebuchi nosiri
ABSTRACT: Voltage stability investigation of the Nigeria 330kV grid Power Network was carried out using Eigenvalues method. The power system Jacobian matrix was derived using Newton-Raphson power flow solution iterative method to determine the eigenvalues for the voltage stability evaluation of both the existing 28-bus and improved 52-bus Nigeria 330kV power networks. Positive and negative eigenvalues quantifying the power system voltage stability were identified. For a steady state power system, positive and negative eigenvalues showed stable and unstable systems respectively. The eigenvalues voltage stability method was developed, formulated and implemented on the existing 28-bus and proposed improved 52-bus Nigeria 330kV power networks. The various eigenvalues, eigenvectors, participation factors and weak buses contributing to system voltage instability were determined using Matlab/SIMULINK Power System Analysis Toolbox (PSAT) for these power networks.
Voltage Profile Enhancement and Reduction of Real Power loss by Hybrid Biogeo...ijeei-iaes
This paper presents Hybrid Biogeography algorithm for solving the multi-objective reactive power dispatch problem in a power system. Real Power Loss minimization and maximization of voltage stability margin are taken as the objectives. Artificial bee colony optimization (ABC) is quick and forceful algorithm for global optimization. Biogeography-Based Optimization (BBO) is a new-fangled biogeography inspired algorithm. It mainly utilizes the biogeography-based relocation operator to share the information among solutions. In this work, a hybrid algorithm with BBO and ABC is projected, and named as HBBABC (Hybrid Biogeography based Artificial Bee Colony Optimization), for the universal numerical optimization problem. HBBABC merge the searching behavior of ABC with that of BBO. Both the algorithms have different solution probing tendency like ABC have good exploration probing tendency while BBO have good exploitation probing tendency. HBBABC used to solve the reactive power dispatch problem and the proposed technique has been tested in standard IEEE30 bus test system.
Hybrid Quantum Genetic Particle Swarm Optimization Algorithm For Solving Opti...paperpublications3
Abstract: This paper presents hybrid particle swarm algorithm for solving the multi-objective reactive power dispatch problem. Modal analysis of the system is used for static voltage stability assessment. Loss minimization and maximization of voltage stability margin are taken as the objectives. Generator terminal voltages, reactive power generation of the capacitor banks and tap changing transformer setting are taken as the optimization variables. Evolutionary algorithm and Swarm Intelligence algorithm (EA, SI), a part of Bio inspired optimization algorithm, have been widely used to solve numerous optimization problem in various science and engineering domains. In this paper, a framework of hybrid particle swarm optimization algorithm, called Hybrid quantum genetic particle swarm optimization (HQGPSO), is proposed by reasonably combining the Q-bit evolutionary search of quantum particle swarm optimization (QPSO) algorithm and binary bit evolutionary search of genetic particle swarm optimization (GPSO) in order to achieve better optimization performances. The proposed HQGPSO also can be viewed as a kind of hybridization of micro-space based search and macro-space based search, which enriches the searching behavior to enhance and balance the exploration and exploitation abilities in the whole searching space. In order to evaluate the proposed algorithm, it has been tested on IEEE 30 bus system and compared to other algorithms.
Keywords: quantum particle swarm optimization, genetic particle swarm optimization, hybrid algorithm Optimization, Swarm Intelligence, optimal reactive power, Transmission loss.
Reduction of Active Power Loss byUsing Adaptive Cat Swarm Optimizationijeei-iaes
This paper presents, an Adaptive Cat Swarm Optimization (ACSO) for solving reactive power dispatch problem. Cat Swarm Optimization (CSO) is one of the new-fangled swarm intelligence algorithms for finding the most excellent global solution. Because of complication, sometimes conventional CSO takes a lengthy time to converge and cannot attain the precise solution. For solving reactive power dispatch problem and to improve the convergence accuracy level, we propose a new adaptive CSO namely ‘Adaptive Cat Swarm Optimization’ (ACSO). First, we take account of a new-fangled adaptive inertia weight to velocity equation and then employ an adaptive acceleration coefficient. Second, by utilizing the information of two previous or next dimensions and applying a new-fangled factor, we attain to a new position update equation composing the average of position and velocity information. The projected ACSO has been tested on standard IEEE 57 bus test system and simulation results shows clearly about the high-quality performance of the planned algorithm in tumbling the real power loss.
VHDL Based Maximum Power Point Tracking of Photovoltaic Using Fuzzy Logic Con...IJECEIAES
It is important to have an efficient maximum power point tracking (MPPT) technique to increase the photovoltaic (PV) generation system output efficiency. This paper presents a design of MPPT techniques for PV module to increase its efficiency. Perturb and Observe method (P&O), incremental conductance method (IC), and Fuzzy logic controller (FLC) techniques are designed to be used for MPPT. Also FLC is built using MATLAB/ SIMULINK and compared with the FLC toolbox existed in the MATLAB library. FLC does not need knowledge of the exact model of the system so it is easy to implement. A comparison between different techniques shows the effectiveness of the fuzzy logic controller techniques. Finally, the proposed FLC is built in very high speed integrated circuit description language (VHDL). The simulation results obtained with ISE Design Suite 14.6 software show a satisfactory performance with a good agreement compared to obtained values from MATLAB/SIMULINK. The good tracking efficiency and rapid response to environmental parameters changes are adopted by the simulation results.
Electric distribution network reconfiguration for power loss reduction based ...IJECEIAES
This paper proposes a method for solving the distribution network reconfiguration (NR) problem based on runner root algorithm (RRA) for reducing active power loss. The RRA is a recent developed metaheuristic algorithm inspired from runners and roots of plants to search water and minerals. RRA is equipped with four tools for searching the optimal solution. In which, the random jumps and the restart of population are used for exploring and the elite selection and random jumps around the current best solution are used for exploiting. The effectiveness of the RRA is evaluated on the 16 and 69-node system. The obtained results are compared with particle swarm optimization and other methods. The numerical results show that the RRA is the potential method for the NR problem.
Investigation of Interleaved Boost Converter with Voltage multiplier for PV w...ecij
This paper depicts the significance of Interleaved Boost Converter (IBC) with diode-capacitor multiplierwith PV as the input source. Maximum Power Point Tracking (MPPT) was used to obtain maximum power from the PV system. In this, interleaving topology is used to reduce the input current ripple, output voltage ripple, power loss and to suppress the ripple in battery current in the case of Plugin Hybrid Electric Vehicle (PHEV). Moreover, voltage multiplier cells are added in the IBC configuration to reduce the narrow turn-off periods. Two MPPT techniques are compared in this paper: i) Perturb and Observe (P&O) algorithm ii) Fuzzy Logic . The two algorithms are simulated using MATLAB and the comparison of performance parameters like the ripple is done and the results are verified.
International Journal of Engineering Research and DevelopmentIJERD Editor
• Electrical, Electronics and Computer Engineering,
• Information Engineering and Technology,
• Mechanical, Industrial and Manufacturing Engineering,
• Automation and Mechatronics Engineering,
• Material and Chemical Engineering,
• Civil and Architecture Engineering,
• Biotechnology and Bio Engineering,
• Environmental Engineering,
• Petroleum and Mining Engineering,
• Marine and Agriculture engineering,
• Aerospace Engineering
Optimal Power Flow with Reactive Power Compensation for Cost And Loss Minimiz...ijeei-iaes
One of the concerns of power system planners is the problem of optimum cost of generation as well as loss minimization on the grid system. This issue can be addressed in a number of ways; one of such ways is the use of reactive power support (shunt capacitor compensation). This paper used the method of shunt capacitor placement for cost and transmission loss minimization on Nigerian power grid system which is a 24-bus, 330kV network interconnecting four thermal generating stations (Sapele, Delta, Afam and Egbin) and three hydro stations to various load points. Simulation in MATLAB was performed on the Nigerian 330kV transmission grid system. The technique employed was based on the optimal power flow formulations using Newton-Raphson iterative method for the load flow analysis of the grid system. The results show that when shunt capacitor was employed as the inequality constraints on the power system, there is a reduction in the total cost of generation accompanied with reduction in the total system losses with a significant improvement in the system voltage profile
FLOWER POLLINATION ALGORITHM FOR SOLVING OPTIMAL REACTIVE POWER DISPATCH PRO...paperpublications3
Abstract: This paper proposes a Flower Pollination Algorithm for solving the multi-objective reactive power dispatch problem. Minimization of real power loss and enhancement voltage stability index margin is taken as objective. Flower pollination algorithm is a new nature-inspired algorithm, based on the characteristics of flowering plants. The simulation results demonstrate better performance of the FPA in solving an optimal reactive power dispatch problem. In order to evaluate the performance of the proposed algorithm, it has been tested on IEEE 30 bus system and compared to other algorithms. Simulation results show that FPA is better than other algorithms in reducing the real power loss and enhancing the voltage stability.
Keywords: flower algorithm, optimization, metaheuristics, optimal reactive power, Transmission loss.
Optimal Reactive Power Dispatch using Crow Search Algorithm IJECEIAES
The optimal reactive power dispatch is a kind of optimization problem that plays a very important role in the operation and control of the power system. This work presents a meta-heuristic based approach to solve the optimal reactive power dispatch problem. The proposed approach employs Crow Search algorithm to find the values for optimal setting of optimal reactive power dispatch control variables. The proposed way of approach is scrutinized and further being tested on the standard IEEE 30-bus, 57-bus and 118-bus test system with different objectives which includes the minimization of real power losses, total voltage deviation and also the enhancement of voltage stability. The simulation results procured thus indicates the supremacy of the proposed approach over the other approaches cited in the literature.
Dwindling of real power loss by using Improved Bees Algorithmpaperpublications3
Abstract: In this paper, a new Improved Bees Algorithm (IBA) is proposed for solving reactive power dispatch problem. The aim of this paper is to utilize an optimization algorithm called the improved Bees Algorithm, inspired from the natural foraging behaviour of honey bees, to solve the reactive power dispatch problem. The IBA algorithm executes both an exploitative neighbourhood search combined with arbitrary explorative search. The proposed Improved Imperialist Competitive Algorithm (IBA) algorithm has been tested on standard IEEE 57 bus test system and simulation results show clearly the high-quality performance of the projected algorithm in reducing the real power loss.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
VHDL Based Maximum Power Point Tracking of Photovoltaic Using Fuzzy Logic Con...IJECEIAES
It is important to have an efficient maximum power point tracking (MPPT) technique to increase the photovoltaic (PV) generation system output efficiency. This paper presents a design of MPPT techniques for PV module to increase its efficiency. Perturb and Observe method (P&O), incremental conductance method (IC), and Fuzzy logic controller (FLC) techniques are designed to be used for MPPT. Also FLC is built using MATLAB/ SIMULINK and compared with the FLC toolbox existed in the MATLAB library. FLC does not need knowledge of the exact model of the system so it is easy to implement. A comparison between different techniques shows the effectiveness of the fuzzy logic controller techniques. Finally, the proposed FLC is built in very high speed integrated circuit description language (VHDL). The simulation results obtained with ISE Design Suite 14.6 software show a satisfactory performance with a good agreement compared to obtained values from MATLAB/SIMULINK. The good tracking efficiency and rapid response to environmental parameters changes are adopted by the simulation results.
Electric distribution network reconfiguration for power loss reduction based ...IJECEIAES
This paper proposes a method for solving the distribution network reconfiguration (NR) problem based on runner root algorithm (RRA) for reducing active power loss. The RRA is a recent developed metaheuristic algorithm inspired from runners and roots of plants to search water and minerals. RRA is equipped with four tools for searching the optimal solution. In which, the random jumps and the restart of population are used for exploring and the elite selection and random jumps around the current best solution are used for exploiting. The effectiveness of the RRA is evaluated on the 16 and 69-node system. The obtained results are compared with particle swarm optimization and other methods. The numerical results show that the RRA is the potential method for the NR problem.
Investigation of Interleaved Boost Converter with Voltage multiplier for PV w...ecij
This paper depicts the significance of Interleaved Boost Converter (IBC) with diode-capacitor multiplierwith PV as the input source. Maximum Power Point Tracking (MPPT) was used to obtain maximum power from the PV system. In this, interleaving topology is used to reduce the input current ripple, output voltage ripple, power loss and to suppress the ripple in battery current in the case of Plugin Hybrid Electric Vehicle (PHEV). Moreover, voltage multiplier cells are added in the IBC configuration to reduce the narrow turn-off periods. Two MPPT techniques are compared in this paper: i) Perturb and Observe (P&O) algorithm ii) Fuzzy Logic . The two algorithms are simulated using MATLAB and the comparison of performance parameters like the ripple is done and the results are verified.
International Journal of Engineering Research and DevelopmentIJERD Editor
• Electrical, Electronics and Computer Engineering,
• Information Engineering and Technology,
• Mechanical, Industrial and Manufacturing Engineering,
• Automation and Mechatronics Engineering,
• Material and Chemical Engineering,
• Civil and Architecture Engineering,
• Biotechnology and Bio Engineering,
• Environmental Engineering,
• Petroleum and Mining Engineering,
• Marine and Agriculture engineering,
• Aerospace Engineering
Optimal Power Flow with Reactive Power Compensation for Cost And Loss Minimiz...ijeei-iaes
One of the concerns of power system planners is the problem of optimum cost of generation as well as loss minimization on the grid system. This issue can be addressed in a number of ways; one of such ways is the use of reactive power support (shunt capacitor compensation). This paper used the method of shunt capacitor placement for cost and transmission loss minimization on Nigerian power grid system which is a 24-bus, 330kV network interconnecting four thermal generating stations (Sapele, Delta, Afam and Egbin) and three hydro stations to various load points. Simulation in MATLAB was performed on the Nigerian 330kV transmission grid system. The technique employed was based on the optimal power flow formulations using Newton-Raphson iterative method for the load flow analysis of the grid system. The results show that when shunt capacitor was employed as the inequality constraints on the power system, there is a reduction in the total cost of generation accompanied with reduction in the total system losses with a significant improvement in the system voltage profile
FLOWER POLLINATION ALGORITHM FOR SOLVING OPTIMAL REACTIVE POWER DISPATCH PRO...paperpublications3
Abstract: This paper proposes a Flower Pollination Algorithm for solving the multi-objective reactive power dispatch problem. Minimization of real power loss and enhancement voltage stability index margin is taken as objective. Flower pollination algorithm is a new nature-inspired algorithm, based on the characteristics of flowering plants. The simulation results demonstrate better performance of the FPA in solving an optimal reactive power dispatch problem. In order to evaluate the performance of the proposed algorithm, it has been tested on IEEE 30 bus system and compared to other algorithms. Simulation results show that FPA is better than other algorithms in reducing the real power loss and enhancing the voltage stability.
Keywords: flower algorithm, optimization, metaheuristics, optimal reactive power, Transmission loss.
Optimal Reactive Power Dispatch using Crow Search Algorithm IJECEIAES
The optimal reactive power dispatch is a kind of optimization problem that plays a very important role in the operation and control of the power system. This work presents a meta-heuristic based approach to solve the optimal reactive power dispatch problem. The proposed approach employs Crow Search algorithm to find the values for optimal setting of optimal reactive power dispatch control variables. The proposed way of approach is scrutinized and further being tested on the standard IEEE 30-bus, 57-bus and 118-bus test system with different objectives which includes the minimization of real power losses, total voltage deviation and also the enhancement of voltage stability. The simulation results procured thus indicates the supremacy of the proposed approach over the other approaches cited in the literature.
Dwindling of real power loss by using Improved Bees Algorithmpaperpublications3
Abstract: In this paper, a new Improved Bees Algorithm (IBA) is proposed for solving reactive power dispatch problem. The aim of this paper is to utilize an optimization algorithm called the improved Bees Algorithm, inspired from the natural foraging behaviour of honey bees, to solve the reactive power dispatch problem. The IBA algorithm executes both an exploitative neighbourhood search combined with arbitrary explorative search. The proposed Improved Imperialist Competitive Algorithm (IBA) algorithm has been tested on standard IEEE 57 bus test system and simulation results show clearly the high-quality performance of the projected algorithm in reducing the real power loss.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
journal publishing, how to publish research paper, Call For research paper, international journal, publishing a paper, IJERD, journal of science and technology, how to get a research paper published, publishing a paper, publishing of journal, publishing of research paper, reserach and review articles, IJERD Journal, How to publish your research paper, publish research paper, open access engineering journal, Engineering journal, Mathemetics journal, Physics journal, Chemistry journal, Computer Engineering, Computer Science journal, how to submit your paper, peer reviw journal, indexed journal, reserach and review articles, engineering journal, www.ijerd.com, research journals,
yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Optimal siting and sizing of unified power flow controller using sensitivity...IJECEIAES
This paper presents Sensitivity constrained placement of unified power flow controller (UPFC) considering active-power flow sensitive index (APFSI) and static voltage stability index (STATIC-VSI) to minimize active-power losses and to improve power transmission capacity. The sensitive factors are derived with respect to voltage, phase angle and current to formulate APFSI. Transmission line impedance parameters along with active and reactivepower flow measurements are considered to formulate static-VSI. Sensitivity constrained differential evolutionary (SCDE) algorithm is proposed for parameter setting through which power control and minimization of losses in system can be achieved. Testing is performed on IEEE-5, 14 and 30-bus networks in MATLAB and results indicate that SCDE is robust optimization technique compared to conventional method and genetic algorithm (GA).
Firefly Algorithm to Opmimal Distribution of Reactive Power Compensation Units IJECEIAES
The issue of electric power grid mode of optimization is one of the basic directions in power engineering research. Currently, methods other than classical optimization methods based on various bio-heuristic algorithms are applied. The problems of reactive power optimization in a power grid using bio-heuristic algorithms are considered. These algorithms allow obtaining more efficient solutions as well as taking into account several criteria. The Firefly algorithm is adapted to optimize the placement of reactive power sources as well as to select their values. A key feature of the proposed modification of the Firefly algorithm is the solution for the multi-objective optimization problem. Algorithms based on a bio-heuristic process can find a neighborhood of global extreme, so a local gradient descent in the neighborhood is applied for a more accurate solution of the problem. Comparison of gradient descent, Firefly algorithm and Firefly algorithm with gradient descent is carried out.
Hybrid Quantum Genetic Particle Swarm Optimization Algorithm For Solving Opti...paperpublications3
Abstract: This paper presents hybrid particle swarm algorithm for solving the multi-objective reactive power dispatch problem. Modal analysis of the system is used for static voltage stability assessment. Loss minimization and maximization of voltage stability margin are taken as the objectives. Generator terminal voltages, reactive power generation of the capacitor banks and tap changing transformer setting are taken as the optimization variables. Evolutionary algorithm and Swarm Intelligence algorithm (EA, SI), a part of Bio inspired optimization algorithm, have been widely used to solve numerous optimization problem in various science and engineering domains. In this paper, a framework of hybrid particle swarm optimization algorithm, called Hybrid quantum genetic particle swarm optimization (HQGPSO), is proposed by reasonably combining the Q-bit evolutionary search of quantum particle swarm optimization (QPSO) algorithm and binary bit evolutionary search of genetic particle swarm optimization (GPSO) in order to achieve better optimization performances. The proposed HQGPSO also can be viewed as a kind of hybridization of micro-space based search and macro-space based search, which enriches the searching behavior to enhance and balance the exploration and exploitation abilities in the whole searching space. In order to evaluate the proposed algorithm, it has been tested on IEEE 30 bus system and compared to other algorithms.
Extraction of photovoltaic generator parameters through combination of an an...IJECEIAES
In the present work, we propose an improved method based on a combination of an analytical and iterative approach to extract the photovoltaic (PV) module parameters using the measured current-voltage characteristics and the simple diode model. First, we calculate the series resistance using a set of analytical formulas for the base values of the three current-voltage curves. Then, the three other parameters are analytically expressed as functions of serial resistance and ideality factor based on the linear least-squares method. Finally, the ideality factor is calculated applying an iterative algorithm to minimize the normalized root mean square error (NRMSE) value. The proposed method was validated with a real experimental set of two PV generators, which showed the best fit to the I-V curve. Moreover, the proposed method needs only the initial value of the ideality factor.
Voltage Regulators Placement in Unbalanced Radial Distribution Systems for Lo...paperpublications3
Abstract: The Automatic Voltage Regulators (AVRs) help to reduce energy loss and improve the power quality of electric utilities. This paper presents selection of optimal location and tap setting for voltage regulators in Unbalanced Radial Distribution Systems (URDS). Power loss index (PLI) is used for the selection of optimal location of voltage regulators which will first found at each branch except source bus and the bus that has the highest power loss index are picked as the best location for the voltage regulators placement. Particle swarm optimization (PSO), is used for selecting the tap position of voltage regulator in an unbalanced radial distribution system. This algorithm makes the initial selection and tap position setting of the voltage regulators to minimize power losses and provide a good voltage profile along the distribution network and then reduce the total cost to obtain the maximum net savings. The effectiveness of the proposed method is illustrated on a test system of IEEE 33 bus unbalanced radial distribution systems.
Keywords:Unbalanced Radial Distribution Systems (URDS), Load Flow, Power loss index(PLI),Particle swarm optimization(PSO), Voltage Regulator placement, Loss minimization, cost saving.
Design of a new backstepping controller for control of microgrid sources inv...IJECEIAES
Emergency power supply is becoming an important capability for many home or industrial electronic and computer devices. Therefore, the performance of the designed uninterruptible power supplies (UPS) inverters has low distortion at the output voltage. Initially, such inverters were controlled by proportional integral (PI) control classic rules. This method is difficult to understand the limitations of stability and to apply transient response to strong external disturbances. In this paper, an inverter is simulated and offered for single-phase and three-phase voltage controlled by a non-linear controller. For this purpose, a comparison has been made between the controller performance and the PI controller. In the first step, there is a backstepping regulator that uses the stability tool next to the Lyapunov function. And the other regulator operates according to the PI method. The performance of these two regulators is simulated during a change in reference or a load change in MATLAB. Also, a method of feedback voltage control based on the Lyapunov theory for controlling of the distributed generation (DG) unit independent inverter is presented. The proposed controller is not only simple, but also against the sudden changes in load and the unspecified system is resistant.
Comparative study of methods for optimal reactive power dispatchelelijjournal
Reactive power dispatch plays a main role in order to provide good facility secure and economic operation
in the power system. In a power system optimal reactive power dispatch is supported to improve the voltage
profile, to reduce losses, to improve voltage stability, to reduce cost etc. This paper presents a brief literature survey of reactive power dispatch and also discusses a comparative study of conventional and evolutionary computation techniques applied for reactive power dispatch. The paper is useful for researchers for further research and study so that it can apply in the various areas of power system
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
The high penetration of power electronic based distributed energy resources (DERs) has increased the importance and attention given to voltage security of distribution systems. Voltage control in the electrical power system is critical for a proper operating condition. Therefore, distribution systems must have the ability to maintain a secure voltage profile. Using inverters for Volt/VAR control (VVC) can provide a faster response for voltage regulation than traditional voltage regulation devices, such as transformer load tap changers and voltage regulators. The primary objective of this paper is to demonstrate how smart inverters can be used to eliminate the voltage deviation by solving a mixed-integer quadratic program to determine the amount of reactive power that should be injected or absorbed at the appropriate nodes. The proposed method incorporates capacitor banks connected to the network and determines whether to turn on or off the capacitor bank for voltage regulation. These processes will be demonstrated in several cases that are focused on mitigating voltage-dips and swells.
The high penetration of power electronic based distributed energy resources (DERs) has increased the importance and attention given to voltage security of distribution systems. Voltage control in the electrical power system is critical for a proper operating condition. Therefore, distribution systems must have the ability to maintain a secure voltage profile. Using inverters for Volt/VAR control (VVC) can provide a faster response for voltage regulation than traditional voltage regulation devices, such as transformer load tap changers and voltage regulators. The primary objective of this paper is to demonstrate how smart inverters can be used to eliminate the voltage deviation by solving a mixed-integer quadratic program to determine the amount of reactive power that should be injected or absorbed at the appropriate nodes. The proposed method incorporates capacitor banks connected to the network and determines whether to turn on or off the capacitor bank for voltage regulation. These processes will be demonstrated in several cases that are focused on mitigating voltage-dips and swells.
A Particle Swarm Optimization for Reactive Power Optimizationijceronline
This paper presents implementation of new algorithm Particle Swarm Optimization (PSO) for Energy Saving through minimizing power losses. The PSO Algorithm Solution is tested in standard IEEE 30 Bus system. The objective is to optimize the reactive power dispatch with optimal setting of control variables without violating inequality constraints and satisfying equality constraint. Control Variables are of both types: Continuous and Discrete. The continuous control variables are generator bus voltage magnitudes;whereas the discrete variables are transformer tap settings and reactive power of shunt compensators (Capacitor banks) .
An Heterogeneous Population-Based Genetic Algorithm for Data Clusteringijeei-iaes
As a primary data mining method for knowledge discovery, clustering is a technique of classifying a dataset into groups of similar objects. The most popular method for data clustering K-means suffers from the drawbacks of requiring the number of clusters and their initial centers, which should be provided by the user. In the literature, several methods have proposed in a form of k-means variants, genetic algorithms, or combinations between them for calculating the number of clusters and finding proper clusters centers. However, none of these solutions has provided satisfactory results and determining the number of clusters and the initial centers are still the main challenge in clustering processes. In this paper we present an approach to automatically generate such parameters to achieve optimal clusters using a modified genetic algorithm operating on varied individual structures and using a new crossover operator. Experimental results show that our modified genetic algorithm is a better efficient alternative to the existing approaches.
Development of a Wireless Sensors Network for Greenhouse Monitoring and Controlijeei-iaes
Wireless sensor networks (WSN) could be used to monitor and control many parameters of environment such as temperature, humidity, and radiation leakage. In greenhouse the weather and soil should be independent of the natural agents. To achieve this condition a wireless sensor nodes could be deployed and communicate with a central base station to measure and transmit the sensed required environment factors. In this paper a WSN was implemented by deployed wireless sensor nodes in a greenhouse with temperature, humidity, moisture light, and CO2 sensors. The proposed model was built and tested, and the result shows an excellent improvement in the sensed parameters. To control the environmental factors, the used microcontroller programmed to control the parameters according to preset values, or manually through a user interface panel.
Analysis of Genetic Algorithm for Effective power Delivery and with Best Upsurgeijeei-iaes
Wireless network is ready for hundreds or thousands of nodes, where each node is connected to one or sometimes more sensors. WSN sensor integrated circuits, embedded systems, networks, modems, wireless communication and dissemination of information. The sensor may be an obligation to technology and science. Recent developments underway to miniaturization and low power consumption. They act as a gateway, and prospective clients, I usually have the data on the server WSN. Other components separate routing network routers, called calculating and distributing routing tables. Discussed the routing of wireless energy balance. Optimization solutions, we have created a genetic algorithm. Before selecting an algorithm proposed for the construction of the center console. In this study, the algorithms proposed model simulated results based on "parameters depending dead nodes, the number of bits transmitted to a base station, where the number of units sent to the heads of fuel consumption compared to replay and show that the proposed algorithm has a network of a relative.
Design for Postplacement Mousing based on GSM in Long-Distanceijeei-iaes
This design for mousing is made up of power control module, infrared sensor module, signal processing module, distance information transportation based on GSM and device of power grid. The design consists of two sets of conductors, separately linked by fire wire and null line and distributing alternatively. The major innovation is infrared sensor module with Fresnel lens, and that the infrared detecting area should be spread in one direction at least. When the mouse get into the infrared detecting area, the sensor signal of infrared detecting device is sent to power control module through signal element and then starts the device of power grid to power up to make the mouse be shocked or die. GSM module is adopted to tell that the mouse is caught successfully. This design can be placed in any position that the mouse is always out and no need of baits.
Investigation of TTMC-SVPWM Strategies for Diode Clamped and Cascaded H-bridg...ijeei-iaes
This paper presents a concept of two types multilevel inverters such as diode clamped and cascaded H-bridge for harmonic reduction on high power applications. Normally, multilevel inverters can be used to reduce the harmonic problems in electrical distribution systems. This paer focused on the performance and analysis of a three phase seven level inverter including diode clamped and cascaded H-bridge based on new tripizodal triangular space vector PWM technique approaches. TTMC based modified Space vector Pulse width modulation technique so called tripizodal triangular Space vector Pulse width modulation (TTMC-SVPWM) technique. In this paper the reference sine wave generated as in case of conventional off set injected SVPWM technique. It is observed that the TTMC-Space vector pulse width modulation ensures excellent, close to optimized pulse distribution results and THD is compared to seven level, diode clamped and cascaded multi level inverters. Theoretical investigations were confirmed by the digital simulations using MATLAB/SIMULINK software.
Mitigation of Power Quality Problems Using Custom Power Devices: A Reviewijeei-iaes
Electrical power quality (EPQ) in distribution systems is a critical issue for commercial, industrial and residential applications. The new concept of advanced power electronic based Custom Power Devices (CPDs) mainly distributed static synchronous compensator (D-STATCOM), dynamic voltage restorer (DVR) and unified power quality conditioner (UPQC) have been developed due to lacking the performance of traditional compensating devices to minimize power quality disturbances. This paper presents a comprehensive review on D-STATCOM, DVR and UPQC to solve the electrical power quality problems of the distribution networks. This is intended to present a broad overview of the various possible DSTATCOM, DVR and UPQC configurations for single-phase (two wire) and three-phase (three-wire and four-wire) networks and control strategies for the compensation of various power quality disturbances. Apart from this, comprehensive explanation, comparison, and discussion on D-STATCOM, DVR, and UPQC are presented. This paper is aimed to explore a broad prospective on the status of D-STATCOMs, DVRs, and UPQCs to researchers, engineers and the community dealing with the power quality enhancement. A classified list of some latest research publications on the topic is also appended for a quick reference.
Comparison of Dynamic Stability Response of A SMIB with PI and Fuzzy Controll...ijeei-iaes
Consumer utilities are non –linear in nature. This injects increased flow of current and reduced voltage with distortions which cause adverse effect on the stability of consumer utilities. To overcome this problem we are using a modern Flexible Alternating Current Transmission System controller i.e. distributed power flow controller (DPFC). This controller is similar to UPFC, which can be installed in a transmission line between the two electrical areas. In DPFC, instead of the common Dc link capacitor three single phase converters are used. In this paper we are concentrating on system stability (oscillation damping). For analyzing the stability of a single machine infinite bus system (SMIB) we have used PI controlled Distributed Power Flow Controller (DPFC) and Fuzzy controlled DPFC. All these models are simulated using MATLAB/SIMULINK. Simulation results shows Fuzzy controlled DPFC are better than PI controlled DPFC. The significance of the results are better stability and constant power supply.
Embellished Particle Swarm Optimization Algorithm for Solving Reactive Power ...ijeei-iaes
This paper proposes Embellished Particle Swarm Optimization (EPSO) algorithm for solving reactive power problem .The main concept of Embellished Particle Swarm Optimization is to extend the single population PSO to the interacting multi-swarm model. Through this multi-swarm cooperative approach, diversity in the whole swarm community can be upheld. Concurrently, the swarm-to-swarm mechanism drastically speeds up the swarm community to converge to the global near optimum. In order to evaluate the performance of the proposed algorithm, it has been tested in standard IEEE 57,118 bus systems and results show that Embellished Particle Swarm Optimization (EPSO) is more efficient in reducing the Real power losses when compared to other standard reported algorithms.
Intelligent Management on the Home Consumers with Zero Energy Consumptionijeei-iaes
The energy and environment crisis has forced modern humans to think about new and clean energy sources and in particular, renewable energy sources. With the development of home network, the residents have the opportunity to plan the home electricity usage with the goal of reducing the cost of electricity. In this regard, to improve the energy consumption efficiency in residential buildings, smart buildings with zero energy consumption were considered as a proper option. Zero-energy building is a building that has smart equipment whose integral of generated and consumed power within a year is zero. In this article, smart devices submit their power consumption with regard to the requested activity associated with the user’s time setting for run times and end times of the work to the energy management unit and ultimately the time to start work will be determined. The problem’s target function is reducing the energy cost for the consumer with taking into account the applicable limitations.
Analysing Transportation Data with Open Source Big Data Analytic Toolsijeei-iaes
Big data analytics allows a vast amount of structured and unstructured data to be effectively processed so that correlations, hidden patterns, and other useful information can be mined from the data. Several open source big data analytic tools that can perform tasks such as dimensionality reduction, feature extraction, transformation, optimization, are now available. One interesting area where such tools can provide effective solutions is transportation. Big data analytics can be used to efficiently manage transport infrastructure assets such as roads, airports, bus stations or ports. In this paper an overview of two open source big data analytic tools is first provided followed by a simple demonstration of application of these tools on transport dataset.
A Pattern Classification Based approach for Blur Classificationijeei-iaes
Blur type identification is one of the most crucial step of image restoration. In case of blind restoration of such images, it is generally assumed that the blur type is known prior to restoration of such images. However, it is not practical in real applications. So, blur type identification is extremely desirable before application of blind restoration technique to restore a blurred image. An approach to categorize blur in three classes namely motion, defocus, and combined blur is presented in this paper. Curvelet transform based energy features are utilized as features of blur patterns and a neural network is designed for classification. The simulation results show preciseness of proposed approach.
Computing Some Degree-Based Topological Indices of Grapheneijeei-iaes
Graphene is one of the most promising nanomaterial because of its unique combination of superb properties, which opens a way for its exploitation in a wide spectrum of applications ranging from electronics to optics, sensors, and bio devices. Inspired by recent work on Graphene of computing topological indices, here we compute new topological indices viz. Arithmetic-Geometric index (AG2 index), SK3 index and Sanskruti index of a molecular graph G and obtain the explicit formulae of these indices for Graphene.
A Lyapunov Based Approach to Enchance Wind Turbine Stabilityijeei-iaes
This paper introduces a nonlinear control of a wind turbine based on a Double Feed Induction Generator. The Rotor Side converter is controlled by using field oriented control and Backstepping strategy to enhance the dynamic stability response. The Grid Side converter is controlled by a sliding mode. These methods aim to increase dynamic system stability for variable wind speed. Hence, The Doubly Fed Induction Generator (DFIG) is studied in order to illustrate its behavior in case of severe disturbance, and its dynamic response in grid connected mode for variable speed wind operation. The model is presented and simulated under Matlab/ Simulink.
Fuzzy Control of a Large Crane Structureijeei-iaes
The usage of tower cranes, one type of rotary cranes, is common in many industrial structures, e.g., shipyards, factories, etc. With the size of these cranes becoming larger and the motion expected to be faster and has no prescribed path, their manual operation becomes difficult and hence, automatic closed-loop control schemes are very important in the operation of rotary crane. In this paper, the plant of concern is a tower crane consists of a rotatable jib that carries a trolley which is capable of traveling over the length of the jib. There is a pendulum-like end line attached to the trolley through a cable of variable length. A fuzzy logic controller with various types of membership functions is implemented for controlling the position of the trolley and damping the load oscillations. It consists of two main types of controllers radial and rotational each of two fuzzy inference engines (FIEs). The radial controller is used to control the trolley position and the rotational is used for damping the load oscillations. Computer simulations are used to verify the performance of the controller. The results from the simulations show the effectiveness of the method in the control of tower crane keeping load swings small at the end of motion.
Site Diversity Technique Application on Rain Attenuation for Lagosijeei-iaes
This paper studied the impact of site diversity (SD) as a fade mitigation technique on rain attenuation at 12 GHz for Lagos. SD is one of the most effective methods to overcome such large fades due to rain attenuation that takes advantage of the usually localized nature of intense rainfall by receiving the satellite downlink signal at two or more earth stations to minimize the prospect of potential diversity stations being simultaneously subjected to significant rain attenuation. One year (January to December 2011) hourly rain gauge data was sourced from the Nigerian Meteorological Agency (NIMET) for three sites (Ikeja, Ikorodu and Marina) in Lagos, Nigeria. Significant improvement in both performance and availability was observed with the application of SD technique; again, separation distance was seen to be responsible for this observed performance improvements.
Impact of Next Generation Cognitive Radio Network on the Wireless Green Eco s...ijeei-iaes
Land mobile communication is burdened with typical propagation constraints due to the channel characteristics in radio systems.Also,the propagation characteristics vary form place to place and also as the mobile unit moves,from time to time.Hence,the tramsmission path between transmitter and receiver varies from simple direct LOS to the one which is severely obstructed by buildings, foliage and terrain. Multipath propagation and shadow fading effects affect the signal strength of an arbitrary Transmitter-Receiver due to the rapid fluctuations in the phase and amplitude of signal which also determines the average power over an area of tens or hundreds of meters. Shadowing introduces additional fluctuations, so the received local mean power varies around the area –mean. The present paper deals with the performance analysis of impact of next generation wireless cognitive radio network on wireless green eco system through signal and interference level based k coverage probability under the shadow fading effects.
Music Recommendation System with User-based and Item-based Collaborative Filt...ijeei-iaes
Internet and E-commerce are the generators of abundant of data, causing information Overloading. The problem of information overloading is addressed by Recommendation Systems (RS). RS can provide suggestions about a new product, movie or music etc. This paper is about Music Recommendation System, which will recommend songs to users based on their past history i.e. taste. In this paper we proposed a collaborative filtering technique based on users and items. First user-item rating matrix is used to form user clusters and item clusters. Next these clusters are used to find the most similar user cluster or most similar item cluster to a target user. Finally songs are recommended from the most similar user and item clusters. The proposed algorithm is implemented on the benchmark dataset Last.fm. Results show that the performance of proposed method is better than the most popular baseline method.
A Real-Time Implementation of Moving Object Action Recognition System Based o...ijeei-iaes
This paper proposes a PixelStreams-based FPGA implementation of a real-time system that can detect and recognize human activity using Handel-C. In the first part of our work, we propose a GUI programmed using Visual C++ to facilitate the implementation for novice users. Using this GUI, the user can program/erase the FPGA or change the parameters of different algorithms and filters. The second part of this work details the hardware implementation of a real-time video surveillance system on an FPGA, including all the stages, i.e., capture, processing, and display, using DK IDE. The targeted circuit is an XC2V1000 FPGA embedded on Agility’s RC200E board. The PixelStreams-based implementation was successfully realized and validated for real-time motion detection and recognition.
Wireless Sensor Network for Radiation Detectionijeei-iaes
n this paper a wireless sensor network (WSN) is designed from a group of radiation detector stations with different types of sensors. These stations are located in different areas and each sensor transmits its data through GSM network to the main monitoring and control station. The design includes GPS module to determine the location of mobile and fixed station. The data is transmitted with GSM/GPRS modem. Instead of using traditional SMS data string or word messages a digital data frame is constructed and transmitted as SMS data. In the main monitoring station graphical user interface (GUI) software is designed to shows information and statues of the all stations in the network. It reports any radiation leaks, in addition to the data; the GUI contains a geographical map to display the location of the leakage station and can control the stations power consumption by sending a special command to it.
Charge Sharing Suppression in Single Photon Processing Pixel Arrayijeei-iaes
This paper proposes a mechanism for suppression of charge sharing in single photon processing pixel array by introducing additional circuit. The idea of the proposed mechanism is that in each pixel only analog part will introduced, the digital part is shared between each four pixels, this leads to reduce the number of transistors (area). By having communication pixels, a decision that which one of the neighboring pixels shall collect the distributed charges is taken. The functionality, which involves analog and digital behaviors, is modeled in VHDL.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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Wolf Search Algorithm for Solving Optimal Reactive Power Dispatch Problem
1. Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
Vol. 3, No. 1, March 2015, pp. 7~15
ISSN: 2089-3272 7
Received November 18, 2014; Revised January 4, 2015; Accepted January 18, 2015
Wolf Search Algorithm for Solving Optimal Reactive
Power Dispatch Problem
K. Lenin*, B. Ravindhranath Reddy, M. Surya Kalavathi
Jawaharlal Nehru Technological University Kukatpally, Hyderabad 500 085, India
email: gklenin@gmail.com*
Abstract
This paper presents a new bio-inspired heuristic optimization algorithm called the Wolf Search
Algorithm (WSA) for solving the multi-objective reactive power dispatch problem. Wolf Search algorithm is
a new bio – inspired heuristic algorithm which based on wolf preying behaviour. The way wolves search for
food and survive by avoiding their enemies has been imitated to formulate the algorithm for solving the
reactive power dispatches. And the speciality of wolf is possessing both individual local searching ability
and autonomous flocking movement and this special property has been utilized to formulate the search
algorithm. The proposed (WSA) algorithm has been tested on standard IEEE 30 bus test system and
simulation results shows clearly about the good performance of the proposed algorithm.
Keywords: modal analysis, optimal reactive power, transmission loss, wolf search algorithm
1. Introduction
Optimal reactive power dispatch problem is subject to number of uncertainties and at
least in the best case to uncertainty parameters given in the demand and about the availability
equivalent amount of shunt reactive power compensators. Optimal reactive power dispatch
plays a major role for the operation of power systems, and it should be carried out in a proper
manner, such that system reliability is not got affected. The main objective of the optimal
reactive power dispatch is to maintain the level of voltage and reactive power flow within the
specified limits under various operating conditions and network configurations. By utilizing a
number of control tools such as switching of shunt reactive power sources, changing generator
voltages or by adjusting transformer tap-settings the reactive power dispatch can be done. By
doing optimal adjustment of these controls in different levels, the redistribution of the reactive
power would minimize transmission losses. This procedure forms an optimal reactive power
dispatch problem and it has a major influence on secure and economic operation of power
systems. Various mathematical techniques like the gradient method [1, 2] Newton method
[3]and linear programming [4-7] have been adopted to solve the optimal reactive power dispatch
problem. Both the gradient and Newton methods has the difficulty in handling inequality
constraints. If linear programming is applied then the input- output function has to be expressed
as a set of linear functions which mostly lead to loss of accuracy. The problem of voltage
stability and collapse play a major role in power system planning and operation [8]. Enhancing
the voltage stability, voltage magnitudes within the limits alone will not be a reliable indicator to
indicate that, how far an operating point is from the collapse point. The reactive power support
and voltage problems are internally related to each other. This paper formulates by combining
both the real power loss minimization and maximization of static voltage stability margin (SVSM)
as the objectives. Global optimization has received extensive research attention, and a great
number of methods have been applied to solve this problem. Evolutionary algorithms such as
genetic algorithm have been already proposed to solve the reactive power flow problem [9, 10].
Evolutionary algorithm is a heuristic approach used for minimization problems by utilizing
nonlinear and non-differentiable continuous space functions. In [11], by using Genetic algorithm
optimal reactive power flow has been solved, and the main aspect considered is network
security maximization. In [12] is proposed to improve the voltage stability index by using Hybrid
differential evolution algorithm. In [13] Biogeography Based algorithm proposed to solve the
reactive power dispatch problem. In [14] a fuzzy based method is used to solve the optimal
reactive power scheduling method and it minimizes real power loss and maximizes Voltage
Stability Margin. In [15] an improved evolutionary programming is used to solve the optimal
2. ISSN: 2089-3272
IJEEI Vol. 3, No. 1, March 2015 : 7 – 15
8
reactive power dispatch problem. In [16] the optimal reactive power flow problem is solved by
integrating a genetic algorithm with a nonlinear interior point method. In [17] a standard
algorithm is used to solve ac-dc optimal reactive power flow model with the generator capability
limits. In [18] proposed a two-step approach to evaluate Reactive power reserves with respect
to operating constraints and voltage stability. In [19] a programming based proposed approach
used to solve the optimal reactive power dispatch problem. In [20] is presented a probabilistic
algorithm for optimal reactive power provision in hybrid electricity markets with uncertain loads.
This research paper proposes a new bio-inspired heuristic search optimization algorithm, the
Wolf Search Algorithm (WSA), for solving the optimal reactive power dispatch problem and this
algorithm is based on wolf preying behaviour activity. Algorithm possesses both individual local
searching ability and autonomous flocking movement. Wolf hunts independently by
remembering its own trait and it will merge with its peer when the peer is in better position. The
swarming behaviour of WSA has more advantage than that of algorithms like PSO [21], Fish
[22] and Firefly [23]. WSA functions as multiple leaders swarming from multiple directions to
reach the best solution, rather than searching as a single flock. How the wolf jumps far out of its
hunter’s visual range to avoid being trapped like that algorithm design will jump away from the
local optimal solution. The wolves in the nature have best memory capability for they can hide
food in caches; also they sense and track down a prey from distances of miles away. They
themselves do set markers in their territory in various methods like by urinating at the borders.
Researcher Sebastian Vetter and his team, from the University of Vienna have been studying
the high level of observational spatial memory in the wolf. Main assumption is that the wolves
are functioning as searching agents in the WSA optimization algorithm are empowered by
memory caches that can able to store the previously visited various positions. The proposed
algorithm WSA been evaluated in standard IEEE 30 bus test system & the simulation results
shows that our proposed approach outperforms all reported algorithms in minimization of real
power loss and voltage stability index .
2. Voltage Stability Evaluation
2.1. Modal Analysis for Voltage Stability Evaluation
Modal analysis is one among best methods for voltage stability enhancement in power
systems. The steady state system power flow equations are given by.
∆P
∆Q
J θ J
J θ J
(1)
Where
∆P = Incremental change in bus real power.
∆Q = Incremental change in bus reactive
Power injection
∆θ = incremental change in bus voltage angle.
∆V = Incremental change in bus voltage Magnitude
Jpθ , JPV , JQθ , JQV jacobian matrix are the sub-matrixes of the System voltage
stability is affected by both P and Q.
To reduce (1), let ∆P = 0 , then:
∆Q J J θJ θ J ∆V J ∆V (2)
∆V J ∆Q (3)
Where,
J J J θJ θ JPV (4)
J is called the reduced Jacobian matrix of the system.
3. IJEEI ISSN: 2089-3272
Wolf Search Algorithm for Solving Optimal Reactive Power Dispatch Problem (K. Lenin)
9
2.2. Modes of Voltage Instability
Voltage Stability characteristics of the system have been identified by computing the
Eigen values and Eigen vectors.
Let,
J ξ˄η (5)
Where,
ξ = right eigenvector matrix of JR
η = left eigenvector matrix of JR
∧= diagonal eigenvalue matrix of JR and
J ξ˄ η (6)
From (5) and (8), we have:
∆V ξ˄ η∆Q (7)
Or,
∆V ∑
ξ η
λ
∆Q (8)
Where ξi is the ith column right eigenvector, and η is the ith row left eigenvector of JR. λi is the
ith Eigen value of JR.
The ith modal reactive power variation is:
∆Q K ξ (9)
Where,
K ∑ ξ 1 (10)
Where
ξji is the jth element of ξi
The corresponding ith modal voltage variation is:
∆V 1 λ⁄ ∆Q (11)
If | λi | =0 then the ith modal voltage will collapse.
In (10), let ∆Q = ek where ek has all its elements zero except the kth one being 1.
Then:
∆V ∑
ƞ ξ
λ
(12)
ƞ
k th element of ƞ
V –Q sensitivity at bus k
∑
ƞ ξ
λ
∑
λ
(13)
3. Problem Formulation
The objectives of the reactive power dispatch problem is to minimize the system real
power loss and maximize the static voltage stability margins (SVSM).
3.1. Minimization of Real Power Loss
Minimization of the real power loss (Ploss) in transmission lines is mathematically
stated as follows.
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P ∑ g θ
,
(14)
Where n is the number of transmission lines, gk is the conductance of branch k, Vi and Vj are
voltage magnitude at bus i and bus j, and θij is the voltage angle difference between bus i and
bus j.
3.2. Minimization of Voltage Deviation
Minimization of the voltage deviation magnitudes (VD) at load buses is mathematically
stated as follows.
Minimize VD = ∑ |V 1.0| (15)
Where nl is the number of load busses and Vk is the voltage magnitude at bus k.
3.3. System Constraints
Objective functions are subjected to these constraints shown below.
Load flow equality constraints:
P – P V ∑
G cos θ
B sin θ
0, i 1,2 … . , nb (16)
Q Q V ∑
G cos θ
B sin θ
0, i 1,2 … . , nb (17)
Where, nb is the number of buses, PG and QG are the real and reactive power of the generator,
PD and QD are the real and reactive load of the generator, and Gij and Bij are the mutual
conductance and susceptance between bus i and bus j.
Generator bus voltage (VGi) inequality constraint:
V V V , i ∈ ng (18)
Load bus voltage (VLi) inequality constraint:
V V V , i ∈ nl (19)
Switchable reactive power compensations (QCi) inequality constraint:
Q Q Q , i ∈ nc (20)
Reactive power generation (QGi) inequality constraint:
Q Q Q , i ∈ ng (21)
Transformers tap setting (Ti) inequality constraint:
T T T , i ∈ nt (22)
Transmission line flow (SLi) inequality constraint:
S S , i ∈ nl (23)
Where, nc, ng and nt are numbers of the switchable reactive power sources, generators and
transformers.
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4. Wolf Search Algorithm
Wolves are social predators that hunt in packs and uses stealth when hunting prey
together. In behaviour of ants it utilizes pheromones to communicate with their peers to know
about food source. WSA [24] also do this kind of communication, which decreases the run time
of the search. Wolves are unique, partially cooperative characteristics and usually move in a
group in coupled formation, but have tendency to take down the prey individually. WSA naturally
balances scouting the problem space in random groups and individual. During hunting, wolves
will group themselves as they approach their prey. This peculiar characteristic prompts the
searching agents in WSA to move for a better position, like the same way wolves continuously
change their positions for better ones. When hunting, wolves search for prey and also keenly
watch the threats from hunters or other animals like tigers etc. Each wolf in the pack chooses its
own way & position continuously moving to a better state for the prey and also for threats in all
directions. When wolves’ bumping into their enemies it is well equipped with a threat probability
and it dashes a great distance away from its present position. The same way in WSA avoids the
deadlock of getting trapped in local optimal solution. The direction and distance the wolf moving
away from a threat are random, and is similar to mutation and crossover in Genetic algorithm
.Wolves have very high sense of smell and it can easily locate prey by scent. Similarly, in the
WSA each wolf has a sensing distance that creates visual distance. This visual distance is
applied to search the global optimum and in moving to a better position and for jumping out of
visual range. In search mode, the wolves are move in Brownian motion (BM), which imitates the
random drifting of particles suspended in fluid.
Basic logics of wolf search
There are three rules that act as basic logics of the Wolf Search Algorithm (WSA)
Rule 1: Each wolf has visual area as a fixed one and with a radius defined by v for X as
a set of continuous possible solutions. Each wolf can sense companions who are all appear
within its visual circle. The footstep expanse by which the wolf moves at a time is normally
smaller than its visual distance.
Rule 2: The fitness of the objective function represents the wolf’s current position. If
there is more options the wolf will chose the best terrain inhabited by another wolf from the
given options. If not, the wolf will continue to move randomly in BM.
Rule 3: if the wolf will sense an enemy then the wolf will immediately escape to a
random position far from the threat and beyond its visual range.
WSA implementation in based on the fitness of the objective function and it reflects the
quality of a terrain position which will eventually lead to food.
Wolf often changes in position in search of food and also to safeguard form the
enemies. Wolf trust with other wolves in movement because they never prey each other. The
movement done by one wolf will be watched by other wolves simultaneously and they position
themselves in chance of finding food also with care of them by continuously moving. If the
current wolf’s location is greater the distance of the companion location, then that new location
will be less attractive one even though the new position may be good one. Wolf’s willingness to
move is decreased means, and then that movement will obey the inverse square law. The
formula is r , where Io is the origin of food and r is the distance between the food or we
can denote that distance between the new terrain and the wolf.
This is the similar formula in the firefly algorithm, for the calculation of attractiveness.
The incentive formula for the wolf search by using absorption coffeicient and gaussian equation,
can be written as:
β r β e (24)
Normally all the wolves want to move better position based on colonized by their peers
position and it depends on many factors like visual distance and how the initial wolf covers the
area. Wolf will visualize the other wolves location each other i.e. it will compare the range of
distance and set by itself in best position for preying and also from enemies. The movement can
be written as:
x i x i β e x j x i escape (25)
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Where, escape ( ) is a function that calculates a random position to jump to with a constraint of
minimum length; v, x is the wolf, which represents a candidate solution; and x(j) is the peer with
a better position as represented by the value of the fitness function. The second term of the
above equation represents the change in value or gain achieved by progressing to the new
position. r is the distance between the wolf and its peer with the better location.
There are three types of preying that takes place in sequence,
1) Preying initiatively
Wolf feed on prey it represents the optimization function as objective. By using the
visual boundary wolf will have step by step movement on constantly seeing the prey and it will
have random movement from the current step to forward or backward depending on the prey
position. If it thinks particular position as best one then it will omit other wolves movements.
Then it will move in own direction.
2) Prey passively
In passive mode the wolf will compare the position with its peers and will improve the
current position. Wolf will move to passive mode when its own movement does not find food or
insecurity for its movement.
3) Escape
Wolves normally have enemies in nature and threat will be there always. If any threat is
found, it will relocate very quickly form the current position to new position which will be normally
greater distance than that of the normal visual range. This can be written in equation as:
if moving
x i x i α ∙ r ∙ rand prey
x i x i α ∙ s ∙ escape escape
(26)
Where x(i) is the wolf’s location; a is the velocity; v is the visual distance; rand() is a random
function whose mean value distributed in [-1,1], s is the step size, which must be smaller than v;
and escape() is a custom function that randomly generates a position greater than v and less
than half of the solution boundary.
Wolf algorithm for solving optimal reactive power dispatch problem:
Step 1: Objective function f(x), x =(x1,x2,..xd)T
Step 2: Initialize the population, xi(i=1,2,..,W)
Step 3: initialize parameters
r = radius of the visual range
s = step size by which a wolf moves at a time
α = velocity factor of wolf
pa = a user-defined threshold [0-1], determines how often foe appears
Step 4: WHILE (t<generations and also for stopping criteria is not met)
step5: FOR i=1: W // each wolf
step6: Prey new food initiatively ();
step7: Generation of new location ();
step8: To check whether the next location suggested by the random number generator
is new one .
step8: If not, repeat generating random location.
Step9:IF(dist(xi,xj) < r and xj is better as f(xi)<f(xj)) xi moves towards xj // xj is a better
than xi
Step 10: ELSE IF
xi = Prey new food passively ();
Step 11: END IF
Generation of new location ();
IF (rand ()>pa)
xi = xi + rand() + v; wolf escape to a new position.
END IF
END FOR
END WHILE
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5. Simulation Results
The accurateness of the proposed WSA method is demonstrated by testing it on
standard IEEE-30 bus system. The IEEE-30 bus system has 6 generator buses, 24 load buses
and 41 transmission lines of which four branches are (6-9), (6-10), (4-12) and (28-27) - are with
the tap setting transformers. The lower voltage magnitude limits at all buses are 0.95 p.u. and
the upper limits are 1.1 for all the PV buses and 1.05 p.u. for all the PQ buses and the reference
bus. The simulation results have been presented in Tables 1, 2, 3 &4. And in the Table 5 shows
the proposed algorithm powerfully reduces the real power losses when compared to other given
algorithms. The optimal values of the control variables along with the minimum loss obtained
are given in Table 1. Corresponding to this control variable setting, it was found that there are
no limit violations in any of the state variables.
Table 1. Results of WSA – ORPD optimal control variables
Control variables Variable setting
V1
V2
V5
V8
V11
V13
T11
T12
T15
T36
Qc10
Qc12
Qc15
Qc17
Qc20
Qc23
Qc24
Qc29
Real power loss
SVSM
1.041
1.042
1.041
1.031
1.002
1.040
1.00
1.00
1.02
1.01
3
3
4
0
3
4
4
3
4.3209
0.2462
Table 2. Results of WSA -Voltage Stability Control Reactive Power Dispatch Optimal Control
Variables
Control Variables Variable Setting
V1
V2
V5
V8
V11
V13
T11
T12
T15
T36
Qc10
Qc12
Qc15
Qc17
Qc20
Qc23
Qc24
Qc29
Real power loss
SVSM
1.043
1.043
1.042
1.031
1.006
1.034
0.090
0.090
0.090
0.090
4
4
3
3
0
3
2
3
4.9870
0.2471
ORPD together with voltage stability constraint problem was handled in this case as a
multi-objective optimization problem where both power loss and maximum voltage stability
margin of the system were optimized simultaneously. Table 2 indicates the optimal values of
these control variables. Also it is found that there are no limit violations of the state variables. It
indicates the voltage stability index has increased from 0.2462 to 0.2471, an advance in the
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system voltage stability. To determine the voltage security of the system, contingency analysis
was conducted using the control variable setting obtained in case 1 and case 2. The Eigen
values equivalents to the four critical contingencies are given in Table 3. From this result it is
observed that the Eigen value has been improved considerably for all contingencies in the
second case.
Table 3. Voltage Stability under Contingency State
Sl.No Contingency ORPD
Setting
VSCRPD
Setting
1 28-27 0.1410 0.1427
2 4-12 0.1658 0.1668
3 1-3 0.1774 0.1784
4 2-4 0.2032 0.2047
Table 4. Limit Violation Checking Of State Variables
State
variables
limits
ORPD VSCRPD
Lower upper
Q1 -20 152 1.3422 -1.3269
Q2 -20 61 8.9900 9.8232
Q5 -15 49.92 25.920 26.001
Q8 -10 63.52 38.8200 40.802
Q11 -15 42 2.9300 5.002
Q13 -15 48 8.1025 6.033
V3 0.95 1.05 1.0372 1.0392
V4 0.95 1.05 1.0307 1.0328
V6 0.95 1.05 1.0282 1.0298
V7 0.95 1.05 1.0101 1.0152
V9 0.95 1.05 1.0462 1.0412
V10 0.95 1.05 1.0482 1.0498
V12 0.95 1.05 1.0400 1.0466
V14 0.95 1.05 1.0474 1.0443
V15 0.95 1.05 1.0457 1.0413
V16 0.95 1.05 1.0426 1.0405
V17 0.95 1.05 1.0382 1.0396
V18 0.95 1.05 1.0392 1.0400
V19 0.95 1.05 1.0381 1.0394
V20 0.95 1.05 1.0112 1.0194
V21 0.95 1.05 1.0435 1.0243
V22 0.95 1.05 1.0448 1.0396
V23 0.95 1.05 1.0472 1.0372
V24 0.95 1.05 1.0484 1.0372
V25 0.95 1.05 1.0142 1.0192
V26 0.95 1.05 1.0494 1.0422
V27 0.95 1.05 1.0472 1.0452
V28 0.95 1.05 1.0243 1.0283
V29 0.95 1.05 1.0439 1.0419
V30 0.95 1.05 1.0418 1.0397
Table 5. Comparison of Real Power Loss
Method Minimum loss
Evolutionary programming [25] 5.0159
Genetic algorithm [26] 4.665
Real coded GA with Lindex as SVSM [27] 4.568
Real coded genetic algorithm [28] 4.5015
Proposed WSA method 4.3209
6. Conclusion
In this paper, the WSA has been successfully implemented to solve optimal reactive
power dispatch (ORPD) problem. The main advantages of WSA when applied to the ORPD
problem is optimization of different type of objective function, i.e real coded of both continuous
and discrete control variables, and without difficulty in handling nonlinear constraints. The
proposed WSA algorithm has been tested on the IEEE 30-bus system. Simulation Results
clearly show the good performance of the proposed algorithm in reducing the real power loss
and enhancing the voltage profiles within the limits.
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