This document summarizes a study on the impacts of distributed generation (DG) on voltage profile in a modern power system. The study uses PSAT software to simulate an IEEE 30-bus test network with and without DG connected. Results show that integrating DG affects the network's reactive power balance and stability. Specifically, the optimal locations for connecting DG are buses 29 and 30, as these buses experience the most voltage drop. While DG provides benefits like voltage support, its integration can also cause issues like voltage rise if placed in weak parts of the distribution network. The results indicate DG placement requires careful analysis to ensure reliable network operation.
Distribution network reconfiguration for loss reduction using PSO method IJECEIAES
In recent years, the reconfiguration of the distribution network has been proclaimed as a method for realizing power savings, with virtually zero cost. The current trend is to design distribution networks with a mesh network structure, but to operate them radially. This is achieved by the establishment of an appropriate number of switchable branches which allow the realization of a radial configuration capable of supplying all of the normal defects in the box of permanent defect. The purpose of this article is to find an optimal reconfiguration using a Meta heuristic method, namely the particle swarm optimization method (PSO), to reduce active losses and voltage deviations by taking into account certain technical constraints. The validity of this method is tested on a 33-IEEE test network and the results obtained are compared with the results of basic load flow.
Optimal Siting And Sizing Of Distributed Generation For Radial Distribution S...inventy
Research Inventy provides an outlet for research findings and reviews in areas of Engineering, Computer Science found to be relevant for national and international development, Research Inventy is an open access, peer reviewed international journal with a primary objective to provide research and applications related to Engineering. In its publications, to stimulate new research ideas and foster practical application from the research findings. The journal publishes original research of such high quality as to attract contributions from the relevant local and international communities.
Various demand side management techniques and its role in smart grid–the stat...IJECEIAES
The current lifestyle of humanity relies heavily on energy consumption, thusrendering it an inevitable need. An ever-increasing demand for energy hasresulted from the increasing population. Most of this demand is met by thetraditional sources that continuously deplete and raise significantenvironmental issues. The existing power structure of developing nations isaging, unstable, and unfeasible, further prolonging the problem. The existingelectricity grid is unstable, vulnerable to blackouts and disruption, has hightransmission losses, low quality of power, insufficient electricity supply, anddiscourages distributed energy sources from being incorporated. Mitigatingthese problems requires a complete redesign of the system of powerdistribution. The modernization of the electric grid, i.e., the smart grid, is anemerging combination of different technologies designed to bring about theelectrical power grid that is changing dramatically. Demand sidemanagement (DSM) allow customers to be more involved in contributors tothe power systems to achieve system goals by scheduling their shiftableload. Effective DSM systems require the participation of customers in thesystem that can be done in a fair system. This paper focuses primarily ontechniques of DSM and demand responses (DR), including schedulingapproaches and strategies for optimal savings.
Network Reconfiguration of Distribution System for Loss Reduction Using GWO A...IJECEIAES
This manuscript presents a feeder reconfiguration in primary distribution networks with an objective of minimizing the real power loss or maximization of power loss reduction. An optimal switching for the network reconfiguration problem is introduced in this article based on step by step switching and simultaneous switching. This paper proposes a Grey Wolf Optimization (GWO) algorithm to solve the feeder reconfiguration problem through fitness function corresponding to optimum combination of switches in power distribution systems. The objective function is formulated to solve the reconfiguration problem which includes minimization of real power loss. A nature inspired Grey Wolf Optimization Algorithm is utilized to restructure the power distribution system and identify the optimal switches corresponding minimum power loss in the distribution network. The GWO technique has tested on standard IEEE 33-bus and 69-bus systems and the results are presented.
Optimal placement of distributed power flow controller for loss reduction usi...eSAT Journals
Abstract
The aim of this paper is to reduce power loss and improve the voltage profiles in an electrical system in optimal manner. The flexible AC transmission system (FACTS) device such as Distributed power flow controller (DPFC) can strongly improve the different parameters in a power system. DPFC can be used to reduce line losses and increase voltage profiles. The optimized allocation of FACTS devices is an important issue, so the Voltage stability index (L-index) has been used in order to place UPFC in power system. The advantage of the L-index is to accelerate the optimization process. After placing the DPFC, Firefly optimization method is used for finding the rating of DPFC. The results obtained using Firefly optimization method is compared with Genetic Algorithm. To show the validity of the proposed techniques and for comparison purposes, simulation carried out on an IEEE- 14 Bus and IEEE- 30 Bus test system for different loading conditions.
Keywords: Distributed power flow controllers (DPFC), Optimized Placement, Voltage stability index (L-index), Firefly optimization method, Genetic algorithm.
Single core configurations of saturated core fault current limiter performanc...IJECEIAES
Economic growth with industrialization and urbanization lead to an extensive increase in power demand. It forced the utilities to add power generating facilities to cause the necessary demand-generation balance. The bulk power generating stations, mostly interconnected, with the penetration of distributed generation result in an enormous rise in the fault level of power networks. It necessitates for electrical utilities to control the fault current so that the existing switchgear can continue its services without upgradation or replacement for reliable supply. The deployment of fault current limiter (FCL) at the distribution and transmission networks has been under investigation as a potential solution to the problem. A saturated core fault current limiter (SCFCL) technology is a smart, scalable, efficient, reliable, and commercially viable option to manage fault levels in existing and future MV/HV supply systems. This paper presents the comparative performance analysis of two single-core SCFCL topologies impressed with different core saturations. It has demonstrated that the single AC winding configuration needs more bias power for affecting the same current limiting performance with an acceptable steady-state voltage drop contribution. The fault state impedance has a transient nature, and the optimum bias selection is a critical design parameter in realizing the SCFCL applications.
Network Reconfiguration in Distribution Systems Using Harmony Search AlgorithmIOSRJEEE
This manuscript explores feeder reconfiguration in distribution networks and presents an efficient method to optimize the radial distribution system by means of simultaneous reconfiguration. Network Reconfiguration of radial distribution system is a significant way of altering the power flow through the lines. This assessment presents a modern method to solve the network reconfiguration problem with an objective of minimizing real power loss and improving the voltage profile in radial distribution system (RDS). A precise and load flow algorithm is applied and the objective function is formulated to solve the problem which includes power loss minimization. HSA Algorithm is utilized to restructure and identify the optimal strap switches for minimization of real power loss in a distribution network.. The strategy has been tested on IEEE 33-bus and 69- bus systems to show the accomplishment and the adequacy of the proposed technique. The results demonstrate that a significant reduction in real power losses and improvement of voltage profiles.
Hybrid bypass technique to mitigate leakage current in the grid-tied inverterIJECEIAES
The extensive use of fossil fuel is destroying the balance of nature that could lead to many problems in the forthcoming era. Renewable energy resources are a ray of hope to avoid possible destruction. Smart grid and distributed power generation systems are now mainly built with the help of renewable energy resources. The integration of renewable energy production system with the smart grid and distributed power generation is facing many challenges that include addressing the issue of isolation and power quality. This paper presents a new approach to address the aforementioned issues by proposing a hybrid bypass technique concept to improve the overall performance of the grid-tied inverter in solar power generation. The topology with the proposed technique is presented using traditional H5, oH5 and H6 inverter. Comparison of topologies with literature is carried out to check the feasibility of the method proposed. It is found that the leakage current of all the proposed inverters is 9 mA and total harmonic distortion is almost about 2%. The proposed topology has good efficiency, common mode and differential mode characteristics.
Distribution network reconfiguration for loss reduction using PSO method IJECEIAES
In recent years, the reconfiguration of the distribution network has been proclaimed as a method for realizing power savings, with virtually zero cost. The current trend is to design distribution networks with a mesh network structure, but to operate them radially. This is achieved by the establishment of an appropriate number of switchable branches which allow the realization of a radial configuration capable of supplying all of the normal defects in the box of permanent defect. The purpose of this article is to find an optimal reconfiguration using a Meta heuristic method, namely the particle swarm optimization method (PSO), to reduce active losses and voltage deviations by taking into account certain technical constraints. The validity of this method is tested on a 33-IEEE test network and the results obtained are compared with the results of basic load flow.
Optimal Siting And Sizing Of Distributed Generation For Radial Distribution S...inventy
Research Inventy provides an outlet for research findings and reviews in areas of Engineering, Computer Science found to be relevant for national and international development, Research Inventy is an open access, peer reviewed international journal with a primary objective to provide research and applications related to Engineering. In its publications, to stimulate new research ideas and foster practical application from the research findings. The journal publishes original research of such high quality as to attract contributions from the relevant local and international communities.
Various demand side management techniques and its role in smart grid–the stat...IJECEIAES
The current lifestyle of humanity relies heavily on energy consumption, thusrendering it an inevitable need. An ever-increasing demand for energy hasresulted from the increasing population. Most of this demand is met by thetraditional sources that continuously deplete and raise significantenvironmental issues. The existing power structure of developing nations isaging, unstable, and unfeasible, further prolonging the problem. The existingelectricity grid is unstable, vulnerable to blackouts and disruption, has hightransmission losses, low quality of power, insufficient electricity supply, anddiscourages distributed energy sources from being incorporated. Mitigatingthese problems requires a complete redesign of the system of powerdistribution. The modernization of the electric grid, i.e., the smart grid, is anemerging combination of different technologies designed to bring about theelectrical power grid that is changing dramatically. Demand sidemanagement (DSM) allow customers to be more involved in contributors tothe power systems to achieve system goals by scheduling their shiftableload. Effective DSM systems require the participation of customers in thesystem that can be done in a fair system. This paper focuses primarily ontechniques of DSM and demand responses (DR), including schedulingapproaches and strategies for optimal savings.
Network Reconfiguration of Distribution System for Loss Reduction Using GWO A...IJECEIAES
This manuscript presents a feeder reconfiguration in primary distribution networks with an objective of minimizing the real power loss or maximization of power loss reduction. An optimal switching for the network reconfiguration problem is introduced in this article based on step by step switching and simultaneous switching. This paper proposes a Grey Wolf Optimization (GWO) algorithm to solve the feeder reconfiguration problem through fitness function corresponding to optimum combination of switches in power distribution systems. The objective function is formulated to solve the reconfiguration problem which includes minimization of real power loss. A nature inspired Grey Wolf Optimization Algorithm is utilized to restructure the power distribution system and identify the optimal switches corresponding minimum power loss in the distribution network. The GWO technique has tested on standard IEEE 33-bus and 69-bus systems and the results are presented.
Optimal placement of distributed power flow controller for loss reduction usi...eSAT Journals
Abstract
The aim of this paper is to reduce power loss and improve the voltage profiles in an electrical system in optimal manner. The flexible AC transmission system (FACTS) device such as Distributed power flow controller (DPFC) can strongly improve the different parameters in a power system. DPFC can be used to reduce line losses and increase voltage profiles. The optimized allocation of FACTS devices is an important issue, so the Voltage stability index (L-index) has been used in order to place UPFC in power system. The advantage of the L-index is to accelerate the optimization process. After placing the DPFC, Firefly optimization method is used for finding the rating of DPFC. The results obtained using Firefly optimization method is compared with Genetic Algorithm. To show the validity of the proposed techniques and for comparison purposes, simulation carried out on an IEEE- 14 Bus and IEEE- 30 Bus test system for different loading conditions.
Keywords: Distributed power flow controllers (DPFC), Optimized Placement, Voltage stability index (L-index), Firefly optimization method, Genetic algorithm.
Single core configurations of saturated core fault current limiter performanc...IJECEIAES
Economic growth with industrialization and urbanization lead to an extensive increase in power demand. It forced the utilities to add power generating facilities to cause the necessary demand-generation balance. The bulk power generating stations, mostly interconnected, with the penetration of distributed generation result in an enormous rise in the fault level of power networks. It necessitates for electrical utilities to control the fault current so that the existing switchgear can continue its services without upgradation or replacement for reliable supply. The deployment of fault current limiter (FCL) at the distribution and transmission networks has been under investigation as a potential solution to the problem. A saturated core fault current limiter (SCFCL) technology is a smart, scalable, efficient, reliable, and commercially viable option to manage fault levels in existing and future MV/HV supply systems. This paper presents the comparative performance analysis of two single-core SCFCL topologies impressed with different core saturations. It has demonstrated that the single AC winding configuration needs more bias power for affecting the same current limiting performance with an acceptable steady-state voltage drop contribution. The fault state impedance has a transient nature, and the optimum bias selection is a critical design parameter in realizing the SCFCL applications.
Network Reconfiguration in Distribution Systems Using Harmony Search AlgorithmIOSRJEEE
This manuscript explores feeder reconfiguration in distribution networks and presents an efficient method to optimize the radial distribution system by means of simultaneous reconfiguration. Network Reconfiguration of radial distribution system is a significant way of altering the power flow through the lines. This assessment presents a modern method to solve the network reconfiguration problem with an objective of minimizing real power loss and improving the voltage profile in radial distribution system (RDS). A precise and load flow algorithm is applied and the objective function is formulated to solve the problem which includes power loss minimization. HSA Algorithm is utilized to restructure and identify the optimal strap switches for minimization of real power loss in a distribution network.. The strategy has been tested on IEEE 33-bus and 69- bus systems to show the accomplishment and the adequacy of the proposed technique. The results demonstrate that a significant reduction in real power losses and improvement of voltage profiles.
Hybrid bypass technique to mitigate leakage current in the grid-tied inverterIJECEIAES
The extensive use of fossil fuel is destroying the balance of nature that could lead to many problems in the forthcoming era. Renewable energy resources are a ray of hope to avoid possible destruction. Smart grid and distributed power generation systems are now mainly built with the help of renewable energy resources. The integration of renewable energy production system with the smart grid and distributed power generation is facing many challenges that include addressing the issue of isolation and power quality. This paper presents a new approach to address the aforementioned issues by proposing a hybrid bypass technique concept to improve the overall performance of the grid-tied inverter in solar power generation. The topology with the proposed technique is presented using traditional H5, oH5 and H6 inverter. Comparison of topologies with literature is carried out to check the feasibility of the method proposed. It is found that the leakage current of all the proposed inverters is 9 mA and total harmonic distortion is almost about 2%. The proposed topology has good efficiency, common mode and differential mode characteristics.
As the rapid development of photovoltaic (PV) technology in recent years with the growth of electricity demand, integration of photovoltaic distributed generation (PVDG) to the distribution system is emerging to fulfil the demand. There are benefits and drawbacks to the distribution system due to the penetration of PVDG. This paper discussed and investigated the impacts of PVDG location and size on distribution power systems. The medium voltage distribution network is connected to the grid with the load being supplied by PVDG. Load flow and short circuit calculation are analyzed by using DigSILENT Power Factory Software. Comparisons have been made between the typical distribution system and the distribution system with the penetration of PVDG. Impacts in which PVDG location and size integrates with distribution system are investigated with the results given from the load flow and short circuit analysis. The results indicate positive impacts on the system interconnected with PVDG such as improving voltage profile, reducing power losses, releasing transmission and distribution grid capacity. It also shows that optimal locations and sizes of DGs are needed to minimize the system’s power losses. On the other hand, it shows that PVDG interconnection to the system can cause reverse power flow at improper DG size and location and increases short circuit level.
Genetic Algorithm based Optimal Placement of Distributed Generation Reducing ...IDES Editor
This paper proposes a genetic algorithm
optimization technique for optimal placement of distributed
generation in a radial distribution system to minimize the total
power loss and to improve the voltage sag performance. Load
flow algorithm and three phase short circuit analysis are
combined appropriately with GA, till access to acceptable
results of this operation. The suggested method is programmed
under MATLAB software. The implementation of the algorithm
is illustrated on a 34-node radial distribution system. Placement
of two DGs with fixed capacity has been considered for example.
Only the three phase symmetrical faults are considered for sag
analysis though other fault types are more common.
Investigation of overvoltage on square, rectangular and L-shaped ground grid...IJECEIAES
Ground grid system is important for preventing the hazardous effects of overvoltage in high voltage substations due to fault current perhaps from lightning strike or device malfunction. Therefore, this study aimed to investigate the effects of overvoltage on square, rectangular and L-shaped ground grids with ground rods being distributed in mesh-pattern by using alternate transients program/electromagnetic transients program (ATP/EMTP) program. The models were simulated in the cases that 25 kAfault current being injected into the center or one of the corners of ground grids. The results showed that the highest level of overvoltage (6.3349 kV) was detected at the corner of rectangular ground grid when the fault current was injected into its corner. However, the lowest level of overvoltage was found when the fault current was injected into the center of square ground grid. The results from this study indicated that ATP/EMTP program was useful for preliminary investigation of overvoltage on ground grids of different shapes. The obtained knowledge could be beneficial for further designing of ground grid systems of high voltage substations to receive the minimal damages due to fault current.
VOLTAGE PROFILE IMPROVEMENT AND LINE LOSSES REDUCTION USING DG USING GSA AND ...Journal For Research
In recent years, the power industry has experienced significant changes on the power distribution systems primarily due to the implementation of smart-grid technology and the incremental implementation of distributed generation. Distributed Generation (DG) is simply defined as the decentralization of power plants by placing smaller generating units closer to the point of consumption, traditionally ten mega-watts or smaller. The distribution power system is generally designed for radial power flow, but with the introduction of DG, power flow becomes bidirectional. Therefore this thesis focuses on testing various indices and using effective techniques for the optimal placement and sizing of the DG unit by minimizing power losses and voltage deviation. A 14-bus radial distribution system has been taken as the test system. The feasibility of the work lies on the fast execution of the programs as it would be equipped with the real time operation of the distribution system and it is seen that execution of the DG placement is quite fast and feasible with the optimization techniques used in this work.
Power loss reduction, improvement of voltage profile, system reliability and system security are the important objectives that motivated researchers to use custom power devices/FACTS devices in power systems. The existing power quality problems such as power losses, voltage instability, voltage profile problem, load ability issues, energy losses, reliability problems etc. are caused due to continuous load growth and outage of components. The significant qualities of custom power devices /FACTS devices such as power loss reduction, improvement of voltage profile, system reliability and system security have motivated researchers in this area and to implement these devices in power system. The optimal placement and sizing of these devices are determined based on economical viability, required quality, reliability and availability. In published literatures, different algorithms are implemented for optimal placement of these devices based on different conditions. In this paper, the published literatures on this field are comprehensively reviewed and elaborate comparison of various algorithms is compared. The inference of this extensive comparative analysis is presented. In this research, Meta heuristic methods and sensitive index methods are used for determining the optimal location and sizing of custom power devices/FACTS devices. The combination of these two methods are also implemented and presented.
Optimal Siting of Distributed Generators in a Distribution Network using Arti...IJECEIAES
Distributed generation (DG) sources are being installed in distribution networks worldwide due to their numerous advantages over the conventional sources which include operational and economical benefits. Random placement of DG sources in a distribution network will result in adverse effects such as increased power loss, loss of voltage stability and reliability, increase in operational costs, power quality issues etc. This paper presents a methodology to obtain the optimal location for the placement of multiple DG sources in a distribution network from a technical perspective. Optimal location is obtained by evaluating a global multi-objective technical index (MOTI) using a weighted sum method. Clonal selection based artificial immune system (AIS) is used along with optimal power flow (OPF) technique to obtain the solution. The proposed method is executed on a standard IEEE-33 bus radial distribution system. The results justify the choice of AIS and the use of MOTI in optimal siting of DG sources which improves the distribution system efficiency to a great extent in terms of reduced real and reactive power losses, improved voltage profile and voltage stability. Solutions obtained using AIS are compared with Genetic algorithm (GA) and Particle Swarm optimization (PSO) solutions for the same objective function.
Investigation of the challenges in establishing plug and play low voltage dc ...PromiseBeshel
A research proposal to improve the stability, efficiency, and reliability problems of low voltage DC microgrids from a communication control strategy point of view.
Talhunt is a leader in assisting and executing IEEE Engineering projects to Engineering students - run by young and dynamic IT entrepreneurs. Our primary motto is to help Engineering graduates in IT and Computer science department to implement their final year project with first-class technical and academic assistance.
Project assistance is provided by 15+ years experienced IT Professionals. Over 100+ IEEE 2015 and 200+ yester year IEEE project titles are available with us. Projects are based on Software Development Life-Cycle (SDLC) model.
The most important components of the distributed generation frameworks is the GTIs which is an interface amidst the utility and the source of energy. The recent years have seen an increased interest in the design and usage of GTIs due to its smaller weight and size, low cost and higher efficiency. But the problem of leakage currents in the transformerless inverter that is dependant on its topology and control scheme needs to be looked into carefully. Also, the high performance of the GTI requires a stringent control and various control systems are being developed and applied to the GTIs. This paper reviews the various topologies that are classified based on the attributes of the leakage current and the method of decoupling. Further it reviews and compares the different control techniques applied to the GTIs with respect to the frame of reference, controller, modulation technique and the control parameters considered.
Multi-objective optimal placement of distributed generations for dynamic loadsIJECEIAES
Large amount of active power losses and low voltage profile are the two major issues concerning the integration of distributed generations with existing power system networks. High R/X ratio and long distance of radial network further aggravates the issues. Optimal placement of distributed generators can address these issues significantly by alleviating active power losses and ameliorating voltage profile in a cost effective manner. In this research, multi-objective optimal placement problem is decomposed into minimization of total active power losses, maximization of bus voltage profile enhancement and minimization of total generation cost of a power system network for static and dynamic load characteristics. Optimum utilization factor for installed generators and available loads is scaled by the analysis of yearly load-demand curve of a network. The developed algorithm of N-bus system is implemented in IEEE-14 bus standard test system to demonstrate the efficacy of the proposed method in different loading conditions.
Frequency regulation service of multiple-areas vehicle to grid application in...IJECEIAES
Regarding a potential of electric vehicles, it has been widely discussed that the electric vehicle can be participated in electricity ancillary services. Among the ancillary service products, the system frequency regulation is often considered. However, the participation in this service has to be conformed to the hierarchical frequency control architecture. Therefore, the vehicle to grid (V2G) application in this article is proposed in the term of multiple-areas of operation. The multiple-areas in this article are concerned as parking areas, which the parking areas can be implied as a V2G operator. From that, V2G operator can obtain the control signal from hierarchical control architecture for power sharing purpose. A power sharing concept between areas is fulfilled by a proposed adaptive droop factor based on battery state of charge and available capacity of parking area. A nonlinear multiplier factor is used for the droop adaptation. An available capacity is also applied as a limitation for the V2G operation. The available capacity is analyzed through a stochastic character. As the V2G application has to be cooperated with the hierarchical control functions, i.e. primary control and secondary control, then the effect of V2G on hierarchical control functions is investigated and discussed.
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly
connected in distribution systems utilizing power electronic
converters. This paper presents a novel control strategy for
achieving maximum benefits from these grid-interfacing inverters
when installed in 3-phase 4-wire distribution systems. The inverter
is controlled to perform as a multi-function device by incorporating
active power filter functionality. The inverter can thus be
utilized as: 1) power converter to inject power generated from
RES to the grid, and 2) shunt APF to compensate current unbalance,
load current harmonics, load reactive power demand and
load neutral current. All of these functions may be accomplished
either individually or simultaneously. With such a control, the
combination of grid-interfacing inverter and the 3-phase 4-wire
linear/non-linear unbalanced load at point of common coupling
appears as balanced linear load to the grid. This new control
concept is demonstrated with extensive MATLAB/Simulink simulation
studies and validated through digital signal processor-based
laboratory experimental results.
Index Terms—Active power filter
Decentralised PI controller design based on dynamic interaction decoupling in...IJECEIAES
An enhanced method for design of decenralised proportional integral (PI) controllers to control various variables of flotation columns is proposed. These columns are multivariable processes characterised by multiple interacting manipulated and controlled variables. The control of more than one variable is not an easy problem to solve as a change in a specific manipulated variable affects more than one controlled variable. Paper proposes an improved method for design of decentralized PI controllers through the introduction of decoupling of the interconnected model of the process. Decoupling the system model has proven to be an effective strategy to reduce the influence of the interactions in the closed-loop control and consistently to keep the system stable. The mathematical derivations and the algorithm of the design procedure are described in detail. The behaviour and performance of the closed-loop systems without and with the application of the decoupling method was investigated and compared through simulations in MATLAB/Simulink. The results show that the decouplers - based closedloop system has better performance than the closed-loop system without decouplers. The highest improvement (2 to 50 times) is in the steady-state error and 1.2 to 7 times in the settling and rising time. Controllers can easily be implemented.
Optimal Placement of Distributed Generation on Radial Distribution System for...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Coordinated planning in improving power quality considering the use of nonlin...IJECEIAES
Power quality has an important role in the distribution of electrical energy. The use of non-linear load can generate harmonic spread which can reduce the power quality in the radial distribution system. This research is in form of coordinated planning by combining distributed generation placement, capacitor placement and network reconfiguration to simultaneously minimize active power losses, total harmonic distortion (THD), and voltage deviation as an objective function using the particle swarm optimization method. This optimization technique will be tested on two types of networks in the form 33-bus and 69-bus IEEE Standard Test System to show effectiveness of the proposed method. The use of MATLAB programming shows the result of simulation of increasing power quality achieved for all scenario of proposed method.
As the rapid development of photovoltaic (PV) technology in recent years with the growth of electricity demand, integration of photovoltaic distributed generation (PVDG) to the distribution system is emerging to fulfil the demand. There are benefits and drawbacks to the distribution system due to the penetration of PVDG. This paper discussed and investigated the impacts of PVDG location and size on distribution power systems. The medium voltage distribution network is connected to the grid with the load being supplied by PVDG. Load flow and short circuit calculation are analyzed by using DigSILENT Power Factory Software. Comparisons have been made between the typical distribution system and the distribution system with the penetration of PVDG. Impacts in which PVDG location and size integrates with distribution system are investigated with the results given from the load flow and short circuit analysis. The results indicate positive impacts on the system interconnected with PVDG such as improving voltage profile, reducing power losses, releasing transmission and distribution grid capacity. It also shows that optimal locations and sizes of DGs are needed to minimize the system’s power losses. On the other hand, it shows that PVDG interconnection to the system can cause reverse power flow at improper DG size and location and increases short circuit level.
Genetic Algorithm based Optimal Placement of Distributed Generation Reducing ...IDES Editor
This paper proposes a genetic algorithm
optimization technique for optimal placement of distributed
generation in a radial distribution system to minimize the total
power loss and to improve the voltage sag performance. Load
flow algorithm and three phase short circuit analysis are
combined appropriately with GA, till access to acceptable
results of this operation. The suggested method is programmed
under MATLAB software. The implementation of the algorithm
is illustrated on a 34-node radial distribution system. Placement
of two DGs with fixed capacity has been considered for example.
Only the three phase symmetrical faults are considered for sag
analysis though other fault types are more common.
Investigation of overvoltage on square, rectangular and L-shaped ground grid...IJECEIAES
Ground grid system is important for preventing the hazardous effects of overvoltage in high voltage substations due to fault current perhaps from lightning strike or device malfunction. Therefore, this study aimed to investigate the effects of overvoltage on square, rectangular and L-shaped ground grids with ground rods being distributed in mesh-pattern by using alternate transients program/electromagnetic transients program (ATP/EMTP) program. The models were simulated in the cases that 25 kAfault current being injected into the center or one of the corners of ground grids. The results showed that the highest level of overvoltage (6.3349 kV) was detected at the corner of rectangular ground grid when the fault current was injected into its corner. However, the lowest level of overvoltage was found when the fault current was injected into the center of square ground grid. The results from this study indicated that ATP/EMTP program was useful for preliminary investigation of overvoltage on ground grids of different shapes. The obtained knowledge could be beneficial for further designing of ground grid systems of high voltage substations to receive the minimal damages due to fault current.
VOLTAGE PROFILE IMPROVEMENT AND LINE LOSSES REDUCTION USING DG USING GSA AND ...Journal For Research
In recent years, the power industry has experienced significant changes on the power distribution systems primarily due to the implementation of smart-grid technology and the incremental implementation of distributed generation. Distributed Generation (DG) is simply defined as the decentralization of power plants by placing smaller generating units closer to the point of consumption, traditionally ten mega-watts or smaller. The distribution power system is generally designed for radial power flow, but with the introduction of DG, power flow becomes bidirectional. Therefore this thesis focuses on testing various indices and using effective techniques for the optimal placement and sizing of the DG unit by minimizing power losses and voltage deviation. A 14-bus radial distribution system has been taken as the test system. The feasibility of the work lies on the fast execution of the programs as it would be equipped with the real time operation of the distribution system and it is seen that execution of the DG placement is quite fast and feasible with the optimization techniques used in this work.
Power loss reduction, improvement of voltage profile, system reliability and system security are the important objectives that motivated researchers to use custom power devices/FACTS devices in power systems. The existing power quality problems such as power losses, voltage instability, voltage profile problem, load ability issues, energy losses, reliability problems etc. are caused due to continuous load growth and outage of components. The significant qualities of custom power devices /FACTS devices such as power loss reduction, improvement of voltage profile, system reliability and system security have motivated researchers in this area and to implement these devices in power system. The optimal placement and sizing of these devices are determined based on economical viability, required quality, reliability and availability. In published literatures, different algorithms are implemented for optimal placement of these devices based on different conditions. In this paper, the published literatures on this field are comprehensively reviewed and elaborate comparison of various algorithms is compared. The inference of this extensive comparative analysis is presented. In this research, Meta heuristic methods and sensitive index methods are used for determining the optimal location and sizing of custom power devices/FACTS devices. The combination of these two methods are also implemented and presented.
Optimal Siting of Distributed Generators in a Distribution Network using Arti...IJECEIAES
Distributed generation (DG) sources are being installed in distribution networks worldwide due to their numerous advantages over the conventional sources which include operational and economical benefits. Random placement of DG sources in a distribution network will result in adverse effects such as increased power loss, loss of voltage stability and reliability, increase in operational costs, power quality issues etc. This paper presents a methodology to obtain the optimal location for the placement of multiple DG sources in a distribution network from a technical perspective. Optimal location is obtained by evaluating a global multi-objective technical index (MOTI) using a weighted sum method. Clonal selection based artificial immune system (AIS) is used along with optimal power flow (OPF) technique to obtain the solution. The proposed method is executed on a standard IEEE-33 bus radial distribution system. The results justify the choice of AIS and the use of MOTI in optimal siting of DG sources which improves the distribution system efficiency to a great extent in terms of reduced real and reactive power losses, improved voltage profile and voltage stability. Solutions obtained using AIS are compared with Genetic algorithm (GA) and Particle Swarm optimization (PSO) solutions for the same objective function.
Investigation of the challenges in establishing plug and play low voltage dc ...PromiseBeshel
A research proposal to improve the stability, efficiency, and reliability problems of low voltage DC microgrids from a communication control strategy point of view.
Talhunt is a leader in assisting and executing IEEE Engineering projects to Engineering students - run by young and dynamic IT entrepreneurs. Our primary motto is to help Engineering graduates in IT and Computer science department to implement their final year project with first-class technical and academic assistance.
Project assistance is provided by 15+ years experienced IT Professionals. Over 100+ IEEE 2015 and 200+ yester year IEEE project titles are available with us. Projects are based on Software Development Life-Cycle (SDLC) model.
The most important components of the distributed generation frameworks is the GTIs which is an interface amidst the utility and the source of energy. The recent years have seen an increased interest in the design and usage of GTIs due to its smaller weight and size, low cost and higher efficiency. But the problem of leakage currents in the transformerless inverter that is dependant on its topology and control scheme needs to be looked into carefully. Also, the high performance of the GTI requires a stringent control and various control systems are being developed and applied to the GTIs. This paper reviews the various topologies that are classified based on the attributes of the leakage current and the method of decoupling. Further it reviews and compares the different control techniques applied to the GTIs with respect to the frame of reference, controller, modulation technique and the control parameters considered.
Multi-objective optimal placement of distributed generations for dynamic loadsIJECEIAES
Large amount of active power losses and low voltage profile are the two major issues concerning the integration of distributed generations with existing power system networks. High R/X ratio and long distance of radial network further aggravates the issues. Optimal placement of distributed generators can address these issues significantly by alleviating active power losses and ameliorating voltage profile in a cost effective manner. In this research, multi-objective optimal placement problem is decomposed into minimization of total active power losses, maximization of bus voltage profile enhancement and minimization of total generation cost of a power system network for static and dynamic load characteristics. Optimum utilization factor for installed generators and available loads is scaled by the analysis of yearly load-demand curve of a network. The developed algorithm of N-bus system is implemented in IEEE-14 bus standard test system to demonstrate the efficacy of the proposed method in different loading conditions.
Frequency regulation service of multiple-areas vehicle to grid application in...IJECEIAES
Regarding a potential of electric vehicles, it has been widely discussed that the electric vehicle can be participated in electricity ancillary services. Among the ancillary service products, the system frequency regulation is often considered. However, the participation in this service has to be conformed to the hierarchical frequency control architecture. Therefore, the vehicle to grid (V2G) application in this article is proposed in the term of multiple-areas of operation. The multiple-areas in this article are concerned as parking areas, which the parking areas can be implied as a V2G operator. From that, V2G operator can obtain the control signal from hierarchical control architecture for power sharing purpose. A power sharing concept between areas is fulfilled by a proposed adaptive droop factor based on battery state of charge and available capacity of parking area. A nonlinear multiplier factor is used for the droop adaptation. An available capacity is also applied as a limitation for the V2G operation. The available capacity is analyzed through a stochastic character. As the V2G application has to be cooperated with the hierarchical control functions, i.e. primary control and secondary control, then the effect of V2G on hierarchical control functions is investigated and discussed.
Grid Interconnection of Renewable Energy Sources at the Distribution Level Wi...Pradeep Avanigadda
Renewable energy resources (RES) are being increasingly
connected in distribution systems utilizing power electronic
converters. This paper presents a novel control strategy for
achieving maximum benefits from these grid-interfacing inverters
when installed in 3-phase 4-wire distribution systems. The inverter
is controlled to perform as a multi-function device by incorporating
active power filter functionality. The inverter can thus be
utilized as: 1) power converter to inject power generated from
RES to the grid, and 2) shunt APF to compensate current unbalance,
load current harmonics, load reactive power demand and
load neutral current. All of these functions may be accomplished
either individually or simultaneously. With such a control, the
combination of grid-interfacing inverter and the 3-phase 4-wire
linear/non-linear unbalanced load at point of common coupling
appears as balanced linear load to the grid. This new control
concept is demonstrated with extensive MATLAB/Simulink simulation
studies and validated through digital signal processor-based
laboratory experimental results.
Index Terms—Active power filter
Decentralised PI controller design based on dynamic interaction decoupling in...IJECEIAES
An enhanced method for design of decenralised proportional integral (PI) controllers to control various variables of flotation columns is proposed. These columns are multivariable processes characterised by multiple interacting manipulated and controlled variables. The control of more than one variable is not an easy problem to solve as a change in a specific manipulated variable affects more than one controlled variable. Paper proposes an improved method for design of decentralized PI controllers through the introduction of decoupling of the interconnected model of the process. Decoupling the system model has proven to be an effective strategy to reduce the influence of the interactions in the closed-loop control and consistently to keep the system stable. The mathematical derivations and the algorithm of the design procedure are described in detail. The behaviour and performance of the closed-loop systems without and with the application of the decoupling method was investigated and compared through simulations in MATLAB/Simulink. The results show that the decouplers - based closedloop system has better performance than the closed-loop system without decouplers. The highest improvement (2 to 50 times) is in the steady-state error and 1.2 to 7 times in the settling and rising time. Controllers can easily be implemented.
Optimal Placement of Distributed Generation on Radial Distribution System for...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
Coordinated planning in improving power quality considering the use of nonlin...IJECEIAES
Power quality has an important role in the distribution of electrical energy. The use of non-linear load can generate harmonic spread which can reduce the power quality in the radial distribution system. This research is in form of coordinated planning by combining distributed generation placement, capacitor placement and network reconfiguration to simultaneously minimize active power losses, total harmonic distortion (THD), and voltage deviation as an objective function using the particle swarm optimization method. This optimization technique will be tested on two types of networks in the form 33-bus and 69-bus IEEE Standard Test System to show effectiveness of the proposed method. The use of MATLAB programming shows the result of simulation of increasing power quality achieved for all scenario of proposed method.
New solutions for optimization of the electrical distribution system availabi...Mohamed Ghaieth Abidi
This paper deals with the availability in microgrids that are composed of a set of sources (Photovoltaic generators, wind turbines, diesel generators and batteries) and a set of loads (critical and uncritical loads). The energy produced by various sources will be grouped in an alternative bus (AC bus), and it will be distributed on loads through an electrical distribution system. The occurrence of a fault in the system can cause a total or partial unavailability of energy required by the loads. The objective of this paper is to characterize the fault caused by the limited reliability of the components of the electrical distribution system and to propose an new design methodology to optimize the availability of this system (as well as the availability of power supply) by taking into account all the economic constraints. The proposed methodology is based on the redundancy of electrical distribution paths. An application of this optimization to a petroleum platform shows clearly a high degree of supply availability distribution in microgrid.
Critical Review of Different Methods for Siting and Sizing Distributed-genera...TELKOMNIKA JOURNAL
Due to several benefits attached to distributed generators such as reduction in line losses,
improved voltage profile, reliable system etc., the study on how to optimally site and size distributed
generators has been on the increase for more than two decades. This has propelled several
researchers to explore various scientific and engineering powerful simulation tools, valid and reliable
scientific methods like analytical, meta-heuristic and hybrid methods to optimally place and size
distributed generator(s) for optimal benefits. This study gives a critical review of different methods
used in siting and sizing distributed generators alongside their results, test systems and gaps in
literature.
PROTECTION OF MICROGRID FROM HIGH IMPEDANCE FAULT USING DIFFERENTIAL RELAYijiert bestjournal
As source of traditional energy is vanishes day by day,importance of microgrid increasing very effectively. In traditional generation and transmission of electrical power we have to rely on frequency and generation of power but in case of microgrid we have to depend on whether condition. Managing these systems to change of atmospheric condition becomes challenging . All study going on all over world related to microgrid protection of microgrid is one of them. Micro grids can either operate connected to the grid,or in the case of a grid fault,in an islanded mod e. Effect of high impedance fault is studied in this paper,by taking help of Matlab - Simulink�s SimPower Systems . We model a microgrid containing mix of renewable DG and one dispatch able source,we then simulate the HIF fault at one of the bus in both gri d - connect and island modes and analyze fault currents and voltage levels in order to determine how the protection scheme of the distribution network would need to be changed to facilitate microgrid functionality. We show that standard protection methods ar e insufficient and propose the use of digital relays which is different from traditional system.
Modeling and Simulation of Grid Connected PV SystemYogeshIJTSRD
In today’s scenario, renewable energy based applications are increasing due to the global warming issue and increase in the prices of fossil fuels. Renewable energy sources RES like sun, biomass, air, water etc. are environmental friendly and have plenty of potential that can be utilized in power generation. However, RES have a problem of intermittent in nature that can be conquered presently by combining RES known as hybrid system that can provide the reliable, economic and environment friendly electricity. The increased penetration of grid connected renewable energy sources has an impact on the grid power quality in particular weak grids. Voltage fluctuation, frequency fluctuation and harmonics are major power quality issues. Muhammad Shahid | MD Ejaz Ali "Modeling and Simulation of Grid Connected PV System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-5 , August 2021, URL: https://www.ijtsrd.com/papers/ijtsrd43761.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/43761/modeling-and-simulation-of-grid-connected-pv-system/muhammad-shahid
Improvement of Power Quality by using Advanced Reactive Power Compensationijtsrd
The maximum power point tracking controller is an essential part of the photovoltaic system and uses its algorithms to obtain the maximum available power of the PV array under various environmental conditions. This paper provides a brief overview of the main MPPT techniques. A particle swarm optimization PSO algorithm was used to automatically find the parameters and improve the performance of the controller. The system was simulated and tested in the MATLAB Simulink environment, the PSO algorithm was run in the m file and the system was simulated hundreds of times to achieve the best results presented in this paper. This article introduced the most common techniques for PV systems to monitor MPP. Proper implementation and design of MPPT technology can greatly improve the efficiency of the energy conversion process and prevent energy losses due to environmental changes. This white paper serves as a practical guide not only for MPPT researchers, but also for designers of commercial PV systems. Mohammad Zishan Alam | Mohd Shahid "Improvement of Power Quality by using Advanced Reactive Power Compensation" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-1 , February 2023, URL: https://www.ijtsrd.com/papers/ijtsrd52737.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/52737/improvement-of-power-quality-by-using-advanced-reactive-power-compensation/mohammad-zishan-alam
PV to Grid Connected Cascaded T type Multilevel Inverter with Improved Harmon...ijtsrd
Multilevel inverters act as a promising solution for medium voltage, high power applications due to their modularity and reduced voltage stress across the switches. Cascaded T Bridge Multilevel Inverters CTB MLI are being considered as the best choice for grid connected Photovoltaic PV systems since they require several sources on the DC side. By means of MLI’s, high quality output with less harmonic distortion is obtained compared to a two level inverter. In this work, a comparative analysis of three levels of MLI’s is presented. Control scheme based on Sinusoidal Pulse Width Modulation SPWM is adopted due to its ease of implementation. More number of levels results in reduced THD and nearly sinusoidal output. Simulation is performed using MATLAB Simulink. Md Janish Alam | Mr. Sarvesh Pratap Singh "PV to Grid Connected Cascaded T-type Multilevel Inverter with Improved Harmonic Performance" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-7 | Issue-1 , February 2023, URL: https://www.ijtsrd.com/papers/ijtsrd52629.pdf Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/52629/pv-to-grid-connected-cascaded-ttype-multilevel-inverter-with-improved-harmonic-performance/md-janish-alam
Control for Grid Connected and Intentional Islanding of Distributed Power Gen...ijtsrd
As the demand for more reliable and secure power system with greater power quality increases, the concept of distributed generation DG have become more popular. This popularity of DG concept has developed simultaneously with the decrease in manufacturing costs associated with clean and alternative technologies like fuel cells, biomass, micro turbine and solar cell systems. Intentional islanding is the purposeful sectionalisation of the utility system during widespread disturbances to create power “islandâ€. This island can be designed to maintain a continuous supply of power during disturbances of the main distribution system. Ruchali Borkute | Nikita Malwar ""Control for Grid Connected and Intentional Islanding of Distributed Power Generation"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-4 , June 2019, URL: https://www.ijtsrd.com/papers/ijtsrd23679.pdf
Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/23679/control-for-grid-connected-and-intentional-islanding-of-distributed-power-generation/ruchali-borkute
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.
Design & Simulation of Energy Storage Unified Power Quality Conditioner (EUPQ...IJERA Editor
Rapid consumption of energy from conventional sources can be limited by connecting more no. of distributed generation systems with the support of smart grid technology. But the impact of variation in DG power out putted may lead to power quality problems in the distributed system in which it is connected. In addition to this power system faults, non- linear loads and non-linear characteristics of converter circuits used in DG s further deteriorate quality of the power. Implementation of UPQC in the network itself solves the problems addressed but crowding of more no of DG in the network will suppress the effect of UPQC. However energy storage system integration can suppress the large power fluctuations outputted by DGs. In this paper energy storage based unified power quality conditioner (EUPQC) has been implemented using fuggy logic controller. For energy storage ultra (Super) capacitor has been used for fast rate of charging and discharging. The performance of the implemented UPQC with fuggy logic controller is compared with PI controller with the MATLAB simulation.
Influencing Factors on Power Losses in Electric Distribution NetworkIJAEMSJORNAL
Line losses reduction greatly affects the performance of the electric distribution network. This paper aims to identify the influencing factors causing power losses in that network. Newton-Raphson method is used for the loss assessment and the Sensitivity analysis by approach One-Factor-At-A-Time (OAT) for the influencing factors identification. Simulation with the meshed IEEE-30 bus test system is carried out under MATLAB environment. Among the 14 parameters investigated of each line, the result shows that the consumed reactive powers by loads, the bus voltages and the linear parameters are the most influencing on the power losses in several lines. Thus, in order to optimize these losses, the solution consists of the reactive power compensation by using capacitor banks; then the placement of appropriate components in the network according to the corresponding loads; and finally, the injection of other energy sources into the bus which recorded high level losses by using the hybrid system for instance.
1. International Journal of Research in Advent Technology, Vol.3, No.7, July 2015
E-ISSN: 2321-9637
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Impacts of the Distributed Generation on Voltage
Profile in Modern Power System
Manoj Kumar Nigam 1
, Dr. V.K. Sethi2
1
Research Scholar, 2
Vice Chancellor, RKDF University, Bhopal, MP, INDIA
Email: nigam74_123@yahoo.com , vksethi1949@gmail.com
Abstract- The role of distributed generation of (DG) in the present scenario is very important for power and energy requirement.
With the improvement in the technology and increasing demands of the customer, the researcher and engineers are concentrating
the research on an alternate resource for power generation which may be cheap and not harmful. The have been used in our study
is the PSAT 2.1.7. MATLAB based software. The result obtained showed a DG can affect the technology is based on the
renewable sources as solar energy, wind energy, tidal energy etc. This paper is based on the effect of distributed generation on
voltage profile as well as reactive power in transmission system for this IEEE-30 bus test network is used. The software stability
and reliability of the overall network.
Index Terms- Distributed generation, power quality, impact, solar energy, etc.
1. INTRODUCTION
The distributed generation in the recent scenario becomes
one of the major field of interest of the engineers as well as the
researchers because of its advantages and the use of
conventional sources of energy destroy the ecological balance
and also harmful to the health of human beings by their
products such as fly ash and other waste material. There is a
need for conducting research on these non-renewable limited
resources to overcome the availability of ill effects in the
nature through using the distributed generation technology
with the following advantages:
1. Voltage support and improved power quality
Produces very less pollution.
2. Can be installed at any desired location.
3. Does not affect the ecological balance.
4. Improved utility system reliability.
5. May be installed as per the requirement of production
capability.
6. Loss reduction
Apart from several advantages, DG possess following
limitations on the distribution network:
1. Disturbs the stability.
2. Affects the performance of the system.
3. Decreases the life of the connected devices.
4. Increase trend of power losses.
These effects are raised at the point of connection of DG
with the distribution network. A radial distribution network is
mostly a power plant consisting a station of main power
generation, supply power energy to the substation located at
far off places and at the last to customers with a main
drawback of highly unreliable and susceptible to the noise
interferences.
The integration of relatively large capacity DG into weak
distribution network may cause a voltage rise especially
during low demand periods [2]
Presently, the impact of DG on the electric utility is
normally assessed in planning studies by running traditional
power flow computations, which seemingly is a reasonable
action, since the penetration ratios of the DG are still relatively
small However, as the installed capacity of DG increases, its
impact on the power system behavior will become more
expressed and will eventually require full-scale detailed
dynamic analysis and simulations to ensure a proper and
reliable operation for of the power system with large
amounts of DG.
More research on this area has been done in this context for
its advancement particularly compensating the effects caused
by DG. Authors used several Methods such as optimal power
flow method, particle swarm optimization, ant colony
optimization, genetic algorithm, monte-carlo simulation
methods have been discussed in [8] [18] [03 [07] [06]. In this
paper the simulation of the IEEE 30 bus test network is done
using Power System Analysis Tool (PSAT) of MATLAB.
2. International Journal of Research in Advent Technology, Vol.3, No.7, July 2015
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The study is focused under the network of 11kV 100MVA
radial distribution network. A wind distributed generation of
68 MVA 11kV and 50 MVA 11kv has been connected to bus
no. 29 and 30 respectively because these buses are more
sensitive.
This section provides the brief introduction of the
distributed generation and the detailed overview of the work
done. The methodology section explains the implementation
of the suggested method for the analysis of an IEEE-30 bus
network. The result section showed the comparative
performance of the network and the location of DG.
2. METHODOLOGY
PSAT 2.1.7 software used for the simulation of an IEEE-30
bus network without DG connected (Fig. 1) and IEEE-30 bus
network with DG connected (Fig. 2). PSAT includes the
following analysis tools:
1. Continuation power flow.
2. Optimal power flow.
3. Time domain analysis.
4. Small signal stability analysis.
For performing the power flow analysis PSAT library
contains various static and dynamic components such as
transmission line, buses, transformers, wind distributed
generation, FACT devices etc.
Figure 1: . IEEE-30 bus network without DG connected
3. International Journal of Research in Advent Technology, Vol.3, No.7, July 2015
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Figure 2: IEEE-30 bus network with DG connected
To determine the location of distributed generation
Distributed generation will also impact losses on the feeder.
DG units may be placed at optimal locations where they can
provide the best reduction in feeder losses. Siting of DG units
to minimize losses is like siting capacitor banks for loss
reduction. The difference is only that the DG units will impact
on both real and reactive power flow. Capacitors only impact
the reactive power flow. Most generators will be operated
between 0.85 Lagging and 1.0 power factor, but some inverter
technologies can provide reactive compensation. [19]
Authors of [1] reported that the optimal location of
connecting DG is the weakest node at which the maximum
voltage drop occurs. It was noticed that the weakest bus in our
work is the bus 30 whereas the authors can also connect the
DG at bus no. 26 and 29 respectively if required.
3. RESULT
The result obtained from continuation power flow of an
IEEE-30 bus network (Table I) and IEEE-30 bus network with
DG connected (Table II) are listed respectively. Comparison
of the reactive power loss when DG is not connected and
when DG connected is showed in (Fig. 3).
4. International Journal of Research in Advent Technology, Vol.3, No.7, July 2015
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TABLE I. POWER FLOW RESULT WITHOUT DG CONNECTED
Bus Q load [p.u]
Bus 1 0
Bus 2 0.41728
Bus 3 0.03943
Bus 4 0.05257
Bus 5 0.62428
Bus 6 0
Bus 7 0.35814
Bus 8 0.98571
Bus 9 0
Bus 10 -0.04854
Bus 11 0
Bus 12 0.24643
Bus 13 0
Bus 14 0.05257
Bus 15 0.08214
Bus 16 0.05914
Bus 17 0.19057
Bus 18 0.02957
Bus 19 0.11171
Bus 20 0.023
Bus 21 0.368
Bus 22 0
Bus 23 0.05257
Bus 24 0.20274
Bus 25 0
Bus 26 0.07557
Bus 27 0
Bus 28 0
Bus 29 0.02957
Bus 30 0.06243
TABLE II. POWER FLOW RESULT WITH DG CONNECTED
Bus Q load [p.u]
Bus 1 0
Bus 2 0.41718
Bus 3 0.03942
Bus 4 0.05256
Bus 5 0.62412
Bus 6 0
Bus 7 0.35805
Bus 8 0.98546
Bus 9 0
Bus 10 -0.0485
Bus 11 0
Bus 12 0.24636
Bus 13 0
Bus 14 0.05256
Bus 15 0.08212
Bus 16 0.05913
Bus 17 0.19052
Bus 18 0.02956
Bus 19 0.11169
Bus 20 0.02299
Bus 21 0.3679
Bus 22 0
Bus 23 0.05256
Bus 24 0.20271
Bus 25 0
Bus 26 0.07555
Bus 27 0
Bus 28 0
Bus 29 0.02956
Bus 30 0.06241
5. International Journal of Research in Advent Technology, Vol.3, No.7, July 2015
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The results obtained for load flow without DG is as follows:
Total Generation
Real power [p.u.] 13.9588
Reactive power [p.u.] 20.138
Total Load
Real power [p.u.] 9.3117
Reactive power [p.u.] 4.0149
Total Losses
Real power [p.u.] 4.6471
Reactive power [p.u.] 16.1231
The result of load flow with DG connected is as follows:
Total Generation
Real power [p.u.] 13.9605
Reactive power [p.u.] 20.1497
Total Load
Real power [p.u.] 9.3093
Reactive power [p.u.] 4.0139
Total Losses
Real power [p.u.] 4.6512
Reactive power [p.u.] 16.1358
Figure 3: Comparison of reactive power loss
4. CONCLUSION
The impact of distributed generation on an IEEE-30 bus
network has been analyzed on a radial distribution network.
The system under study was 11kV 100 MVA network and the
DG connected was of 50 MVA 11kV and 68 MVA and 11kv
to bus no. 30 and 29 respectively. It can be seen from Fig. 3
that the integration of DG disturbs the reactive power balance
of the network. The optimal location for connecting DG into
the network had also been suggested by determining the
weakest node from the result of Table. 1. Thus the integration
of DG onto the affects the network stability and overall
reliability of network.
REFERENCES
[1] S. P. Rajaram, V. Rajasekaran, and V. Sivakumar,
“Optimal Placement of Distributed Generation for
Voltage Stability Improvement and Loss Reduction in
Distribution Network,” IJIRSET, vol. 3, no. 3, pp.529-
543, Mar. 2014.
[2] Donal Caples, Stero Boljevie and Michael Conlon
“impacts of Distributed generation on Voltage Profile in
38 kV distribution System” 2011 8th
international
conference on the European Energy (EEM) 25-27 May
Zagreb , Croatia.
[3] Hamid Falaghi, Mahmood-Reza Haghifam, “ACO Based
Algorithm for Distributed Generation Sources Allocation
and Sizing in Distribution Systems” in Power Tech 2007
IEEE, pp. 555-560.
[4] Thomas Ackermann, Goran Andersson, and Lennart
Soder, “Distributed Generation: a definition,”
Electric Power Systems Research, vol. 57, pp.195-
204, Dec. 2000.
[5] Pathomthat Chiradeja, and R. Ramakumar, “An
Approach to Quantify the Technical Benefits of
6. International Journal of Research in Advent Technology, Vol.3, No.7, July 2015
E-ISSN: 2321-9637
6
Distributed Generation,” IEEE Trans. Energy Conv.
vol. 19, no. 4, pp. 764-773, Dec. 2004.
[6] Walid El-Khattam, Y. G. Hegazy, and M. M. A.
Salama, “Investigating Distributed Generation
Systems Performance Using Monte Carlo
Simulation,” IEEE Trans. Power Syst., vol. 21, no. 2,
pp.524-532, May 2006.
[7] Deependra Singh, Devender Singh, and K. S. Verma,
“Multiobjective Optimization for DG Planning With
Load Models,” IEEE Trans. Power Syst., vol. 24, no.
1, pp. 427-436, Feb. 2009.
[8] Chris J. Dent, Luis F. Ochoa, and Gareth P. Harrison,
“Network Distributed Generation Capacity Analysis
Using OPF With Voltage Steps Constraints,” IEEE
Trans. Power Syst., vol. 25, no. 1, pp.296-304, Feb.
2010.
[9] Jason M. Sexauer, and Salman Mohagheghi, “Voltage
Quality Assessment in a Distribution System With
Distributed Generation- A Probabilistic Load Flow
Approach,” IEEE Trans. Power Del., vol. 28, no. 3,
pp. 1652-1662, Jul. 2013.
[10] Rangan Banerjee, “Comparision of options for
distributed generation in India,” ELSEVIER Energy
Policy, vol. 34, pp. 101-111, Jul. 2004.
[11] J. A. Pecas Lopes, N. Hatziargyriou, J. Mutale, P.
Djapic, and N. Jenkins, “Integrating Distributed
Generation into electric power systems: A review of
drivers, challenges and opportunities,” ELSEVIER
Electric Power Syst. Research, vol. 77, pp. 1189-
1203, Oct. 2006.
[12] Naresh Acharya, Pukar Mahat, and N.
Mithulananthan, “An analytical approach for DG
allocation in primary distribution network,”
ELSEVIER Electrical Power and Energy Syst., vol.
28, pp. 669-678, Feb. 2006.
[13] Qiuye Sun, Zhongxu Li, and Huaguang Zhang,
“Impact of Distributed Generation on Voltage Profile
in Distribution System,” in Proc. 2009 Int. Joint
Conf. on Computational Sciences and Optimization,
pp. 249-252.
[14] M. O. AlRuwaili, M. Y. Vaziri, S. Vadhva, and S.
Vaziri, “Impact of Distributed Generation on Voltage
Profile of Radial Power Systems,” in Proc. 2013
IEEE Green Technologies Conf., pp. 473-480.
[15] Marina Cavlovic, “Challenges of Optimizing the
Integration of Distributed Generation into the
Distribution Network,” in Proc. 8th
Int. Conf. on the
European Energy Market, Zagreb, Croatia, May
2011, pp. 419-426.
[16] JIANG Fengli, ZHANG Zhixia, CAO Tong, HU Bo,
and PIAO Zailin, “Impact of Distributed Generation
on Voltage Profile and Losses of Distribution
Systems,” in Proc. 32nd
Chinese Control Conf.,
Xi’an, China, Jul. 2013, pp. 8587-8591.
[17] P. Chiradeja, and A. Ngaopitakkul, “The Impacts of
Electrical Power Losses due to Distributed
Generation integration to Distribution System,” in
Proc. Int. Conf. on Electrical Machines and Syst.,
Busan, Korea, Oct. 2013, pp. 1330-1333.
[18] M. F. Alhajri, M. R. AlRashidi, and M. E. El-
Hawary, “Hybrid Particle Swarm Optimization
Approach for Optimal Distribution Generation Sizing
and Allocation in Distribution Systems,” in 2007
IEEE, pp. 1290-1293
[19] Philip P. Barker. Robert W. de Mello, “Determining
the Impact of Distributed Generation on Power
Systems: Part - Radial Distribution Systems” Power
Technologies, Inc. -7803-6420-1/00/$10.00(c) 2000 I
AUTHORS PROFILE
AUTHOR 1
Manoj Kumar Nigam received the B.E.
and ME degree in Electrical Engineering
from MITS Gwalior, M.P., India. He has
more than 12 years of experience in teaching
and research and is a Ph.D Scholar in
Electrical Engineering in R.K.D.F University,
Bhopal, M.P., India.
His current research focuses on the “Distributed
generation and power quality Issues in the Power System”.
AUTHOR 2
Dr. V.K. Sethi received the BE (Hons.)
from IIT Roorkee, PG from UK and Ph. D
from IIT Delhi, He was Scientist ‘C’
Department of Atomic Energy, BARC,
Bombay, Asst.Director, Deputy Director
(Faculty) Ministry of Power, Deputy
Director (Site), Director Ministry of Power, Central Electricity
Authority and Ex. Director MOP/CEA, EX-Rector & Director,
RGPV, Bhopal and is now a Vice Chancellor RKDF
University, Bhopal (MP), India.
He has published 115 research papers in reputated national,
international journals and conferences he is an authors of 12
books. His research interests are power plant engineering,
Renewable Energy, Green Power Technologies & CDM
Opportunities.