A method for balancing the supply and demand in an isolated system consisting of voltage control type inverters in friends
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A Method for Balancing the Supply and Demand in an Isolated System Consisting of Voltage Control Type Inverters in FRIENDS
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This document summarizes a study on sensitivity analysis for voltage control methods in a 14 bus distribution network with distributed generators. Three voltage control methods are analyzed: 1) Switching on reactors, 2) Reducing distributed generator reactive power outputs, and 3) Switching off capacitors. For each method, the change in maximum voltage and reactive power is calculated to determine a sensitivity factor. The sensitivity analysis shows that switching on reactors has the highest sensitivity factor and should be the priority method for voltage control, while switching off capacitors has the lowest sensitivity factor. Maintaining voltage within +/- 5% of the base value using coordinated application of these methods based on sensitivity is concluded to provide optimal voltage control in the distribution network.
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MSPWM Based Implementation of Novel 5-level Inverter with Photovoltaic System
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Power quality is certainly a major concern in the present era. This paper proposes a flexible D-STATCOM with a new controller scheme. And it supplies power to sensitive loads under Islanding conditions. This paper introduces the performance of FD-STATCOM system to mitigate power quality problems under all types of system related disturbances such as L-L &DLG faults. A 12 pulse IGBT based D-STATCOM is designed using MATLAB. Here the super capacitor is used as the storage device. The realibility of the control scheme in the system response to the voltage disturbances caused by LL&DLG faults and Islanded operating conditions are obviously proved in the simulation results.
02 19 jan17 12566 final paper in ijeecs format(edit)
To maintain voltage stability of a power system STATCOM is better solution which can provide the required amount of reactive power under various disturbances. In previous work, STATCOM with various energy storage elements was discussed for voltage and power system stability. Apart from these previous works, this work proposes a new structure of hybrid energy storage system (HESS) for voltage stability by using battery and super capacitor. A new model of STATCOM with hybrid energy storage system is designed by using two bidirectional DC-DC converters and results are analyzed for conventional STATCOM and STATCOM with hybrid energy storage system. Results are also analyzed for STATCOM system with out any energy storage system, STATCOM with battery, STATCOM with super capacitor and STATCOM with HESS under sudden load changes by using MATLAB/Simulink.
12 16134 paper 064 ijeecs(edit)
The use of distributed generation (DG) within distribution systems has increased for the last two decades due to worldwide increase in demand for electricity and governmental policy change from “conventional” energy to “green” energy. High levels of penetration of DG have many significant benefits but also come with many drawbacks such as voltage drop and power losses. This study presents the impact of DG at different locations in a distribution feeder in terms of the feeder voltage profile. A radial distribution system is simulated using PSCAD/EMTDC simulation software while changing the size and location of DG in the system. The obtained results are used for better understanding on the impact of DG on voltage profile in radial distribution feeder.
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enabling a significantly less loss and a reduced chip size of the power semiconductors are proposed. The
distributed generation (DG) systems based on the renewable energy sources have rapidly developed in
recent years. These DG systems are powered by micro sources such as fuel cells, photovoltaic (PV) systems,
and batteries. Fuel cells are considered to be one of the most promising sources of distributed energy because
of their high efficiency, low environmental impact and scalability. Non-isolated high step-up DC-DC
converters are required in the industrial applications. Many of these conventional DC–DC converters have the
disadvantages of operating at high duty-cycle, high switch voltage stress and high diode peak current. A
three-level step up converter is implemented to boost the fuel cell stack voltage of 96V to 340V. The proposed
converter consists a system of fuel cell based Multilevel DC-DC converter with PI controller is modeled and
simulated by using Matlab/Simulink.
POWER QUALITY
This presentation discusses power quality improvement in small isolated distribution systems using a DSTATCOM (Distribution Static Compensator) with fuzzy logic control. It aims to regulate voltage, reduce harmonics, correct power factor, and balance loads. The system contains a DSTATCOM connected in parallel to regulate voltage and correct power factor as loads change. Simulation results show the DSTATCOM improves power quality by correcting power factor, balancing loads, and regulating voltage under different load conditions using both PI and fuzzy logic controllers. The presentation concludes fuzzy logic control of a DSTATCOM is effective for power quality improvement in small isolated power systems like ships, islands, and remote generation sites.
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The document presents an algorithm for optimal placement of capacitors in radial distribution systems to enhance voltage stability. It uses voltage stability index (VSI) calculations to determine candidate nodes for capacitor placement. The algorithm iteratively selects the node with the lowest VSI value, calculates the required reactive power compensation, and checks that value against limits. It continues placing capacitors until all VSI values exceed a threshold. The method was tested on several standard test systems and showed improvements to voltage stability and reductions in losses.
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This paper proposes a novel 5-level dc-ac converter circuit using with 6 power semiconductor switches. The proposed multilevel inverter generates five-level ac output voltage by implementing Multi-carrier sinusoidal pulse width modulation (MSPWM) technique with reduced number of switches. The voltage stress on each switching devices and common mode voltage can be minimized from the suggested system. The designed system gives better controlled output current and improved output voltage with diminished total Harmonic Distortion value. The operating principles of the proposed inverter are discussed. DC Input for the proposed system is obtained from PV System. Finally, an experimental prototype of the proposed system with 12-V input voltage and 20 V /5 W output is implemented along with simulation output of the waveform to the load. The efficiency and the reduction of harmonic content are discussed.MITIGATION OF UNBALANCED FAULTS IN DISTRIBUTION SYSTEM USING FD-STATCOM WITH ...
Power quality is certainly a major concern in the present era. This paper proposes a flexible D-STATCOM with a new controller scheme. And it supplies power to sensitive loads under Islanding conditions. This paper introduces the performance of FD-STATCOM system to mitigate power quality problems under all types of system related disturbances such as L-L &DLG faults. A 12 pulse IGBT based D-STATCOM is designed using MATLAB. Here the super capacitor is used as the storage device. The realibility of the control scheme in the system response to the voltage disturbances caused by LL&DLG faults and Islanded operating conditions are obviously proved in the simulation results.
02 19 jan17 12566 final paper in ijeecs format(edit)
To maintain voltage stability of a power system STATCOM is better solution which can provide the required amount of reactive power under various disturbances. In previous work, STATCOM with various energy storage elements was discussed for voltage and power system stability. Apart from these previous works, this work proposes a new structure of hybrid energy storage system (HESS) for voltage stability by using battery and super capacitor. A new model of STATCOM with hybrid energy storage system is designed by using two bidirectional DC-DC converters and results are analyzed for conventional STATCOM and STATCOM with hybrid energy storage system. Results are also analyzed for STATCOM system with out any energy storage system, STATCOM with battery, STATCOM with super capacitor and STATCOM with HESS under sudden load changes by using MATLAB/Simulink.
12 16134 paper 064 ijeecs(edit)
The use of distributed generation (DG) within distribution systems has increased for the last two decades due to worldwide increase in demand for electricity and governmental policy change from “conventional” energy to “green” energy. High levels of penetration of DG have many significant benefits but also come with many drawbacks such as voltage drop and power losses. This study presents the impact of DG at different locations in a distribution feeder in terms of the feeder voltage profile. A radial distribution system is simulated using PSCAD/EMTDC simulation software while changing the size and location of DG in the system. The obtained results are used for better understanding on the impact of DG on voltage profile in radial distribution feeder.
Analysis of Fuel Cell Based Multilevel DC-DC Boost Converter for Induction Motor
In this paper new topologies and interleaving modulation concepts for multilevel DC-DC boost converter
enabling a significantly less loss and a reduced chip size of the power semiconductors are proposed. The
distributed generation (DG) systems based on the renewable energy sources have rapidly developed in
recent years. These DG systems are powered by micro sources such as fuel cells, photovoltaic (PV) systems,
and batteries. Fuel cells are considered to be one of the most promising sources of distributed energy because
of their high efficiency, low environmental impact and scalability. Non-isolated high step-up DC-DC
converters are required in the industrial applications. Many of these conventional DC–DC converters have the
disadvantages of operating at high duty-cycle, high switch voltage stress and high diode peak current. A
three-level step up converter is implemented to boost the fuel cell stack voltage of 96V to 340V. The proposed
converter consists a system of fuel cell based Multilevel DC-DC converter with PI controller is modeled and
simulated by using Matlab/Simulink.
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This presentation discusses power quality improvement in small isolated distribution systems using a DSTATCOM (Distribution Static Compensator) with fuzzy logic control. It aims to regulate voltage, reduce harmonics, correct power factor, and balance loads. The system contains a DSTATCOM connected in parallel to regulate voltage and correct power factor as loads change. Simulation results show the DSTATCOM improves power quality by correcting power factor, balancing loads, and regulating voltage under different load conditions using both PI and fuzzy logic controllers. The presentation concludes fuzzy logic control of a DSTATCOM is effective for power quality improvement in small isolated power systems like ships, islands, and remote generation sites.
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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.
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A comprehensive review on D-FACTS devices
Flexible ac transmission systems (FACTSs) and voltage-source converters, with smart dynamic controllers, are emerging as a stabilization and power filtering equipment to improve the power quality. Also, distributed FACTSs play an important role in improving the power factor, energy utilization, enhancing the power quality, and ensuring efficient energy utilization and energy management in grids. This paper presents a literature survey of FACTS technology tools and applications for power quality and efficient utilization of electric system. There are some drawbacks of FACTS devices. These drawbacks can be fulfilled by using new compound, scalable, light weighted and cost effective devices that are distributed-FACTS (D-FACTS). D-FACTS controllers are distributed version of conventional lumped FACTS controllers and their cost is low due to lower ratings of component and reliability also increases due to redundancy of devices. The Enhanced Power Flow Controller (EPFC) is a D-FACTS controller which is distributed version of thyristor controlled series controller. DPFC controllers are used in series at small distance gap at every 5-10 km distance with transmission line to control the power flow. This paper discusses extensive review of the DPFC controller and its application in modern power system era. Zeba Akram"A comprehensive review on D-FACTS devices" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018, URL: http://www.ijtsrd.com/papers/ijtsrd11649.pdf http://www.ijtsrd.com/engineering/electrical-engineering/11649/a-comprehensive-review-on-d-facts-devices/zeba-akram
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This document presents a study on a nine-level diode-clamped multilevel inverter. A diode-clamped multilevel inverter uses multiple DC voltage levels from separate capacitors to generate stepped output voltages. The proposed nine-level inverter configuration is capable of producing nine distinct output voltage levels. Simulation results show that the total harmonic distortion of the nine-level inverter is 7.84%, lower than the 10.47% THD of a seven-level inverter. Pulse width modulation techniques are used to generate switching signals to control the inverter. The study concludes that increasing the number of voltage levels in a diode-clamped multilevel inverter reduces total harmonic distortion.
STATCOM A Review on Different Configurations and Topologies
Synchronous static compensators STATCOMs have been presented as a member of flexible alternating current transmission systems devices family in both distribution and transmission levels, namely distribution STATCOM and transmission STATCOM, respectively. These compensators have an important role in increasing the power quality in power systems because of having features investigated in various studies and because of the proper implementation of power functions, especially in compensating the voltage flicker. Studies on STATCOM can be categorized in two different parts. The first part is about the various topologies of the electronic converters used in the compensator and different arrangements of the coupling transformers with the network, which can be named as the power part. The second part is about theorizing at the control level, which eventually ends in producing the proper gate signals to control the switching of the electronic power switches in the power part. Considering the fact that two comprehensive reviews on STATCOM have been published in 2002 and 2009, this paper based on the aforementioned categorization reviews the studies fulfilled in the field of synchronous static compensator, especially the relevant studies in recent years published in creditable journals. The paper makes connections among the control methods and compares the ideas about power stage from different perspectives, so that conducted studies will be organized in a systematic order. Simranpreet Singh "STATCOM: A Review on Different Configurations and Topologies" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd20315.pdf
Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/20315/statcom-a-review-on-different-configurations-and-topologies/simranpreet-singh
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To improve the overall efficiency of power system,
the performance of distribution system must be improved. It
is done by installing shunt capacitors in radial distribution
system. The problem of capacitor allocation in electric
distribution systems involves maximizing “energy and peak
power (demand) loss reductions” by means of capacitor
installations. As a result power factor of distribution system
improves. There is also lots of saving in terms of money. A 10
bus radial distribution system is taken as the model. Then a
load flow programs is executed on MATLAB. Then by using
load flow data & fuzzy techniques the determination of suitable
location of capacitor placement and its size is done. Shunt
capacitors to be placed at the nodes of the system will be
represented as reactive power injections. Fuzzy techniques have
advantages of simplicity, less computations & fast results. The
same techniques can be applied to complex distribution systems
& dynamic loads.
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Abstract: When all links are changes in the cascade is the corner of the shape in the dc division
energy orbit (DEO). When resistances are intermission betwixt one by one stylish changes in that
would possibly end up so the cascaded orbits are unsteady. They are antecedent we can place in a
nearer to the useful in the cascaded orbit can be got in compelled to vary the supply they have load
changes in the internal structure of the same regions in the electrical device they can be opposed in
a quality of the characteristic of dc DEO. Throughout the Associate in nursing adaptation active
device in the (AACC) we can know another determined in the cascaded orbit. Therefore the AACC
was connected by side by side in the cascaded orbit’s they can mediate in between the carries and
completely a requirement of a notice then they carries the voltage with none modification in this
subsystems. Then it will have a stylish to the customary have basic units to measuring in the dc
DEO. When the AACC is additionally a similar bus device to cut back the output resistance of the
supply device, therefore averting in a interiority have their load changes in the input resistance, of
the cascaded orbit have their solutions then they becomes constant. We have important carrier
device it will computing in the AACC adaptation in line with they have output energy to the
cascaded orbit, they have energy vesting in the AACC that’s way they will reduced and therefore
they have a lot of energy in a reacting to the orbit so it is a best in the orbit of a submissive device.
What\'s many, since no capacitance have a requirement among an AACC, when the cascaded orbits
have their quantity of it slowly it will extend in time. They have activity fundamental truth to stop
their magnificence thought in the AACC are mentioned throughout of this project, it can have four
thousand eight hundred and zero watts cascaded orbit was contain a strive of process to move in a
full-bridge changes they can be styli shed and evaluated. So when the simulation solutions have to
clear the performance of the arrangement of AACC.
Hybrid Power Supply using Improved H6 based MITCB DC – DC Converter for House...
This document presents a hybrid power supply system using an improved H6-based multi-input transformer-coupled bidirectional DC-DC converter for household applications. The system integrates photovoltaic, wind, and battery sources along with a single-phase H6 inverter to power AC loads and connect to the grid. It aims to meet load demand, manage excess power from sources, charge the battery from sources and grid as needed, and reduce energy conversion stages for improved efficiency. Simulation results show the control scheme effectively manages power flow under different operating conditions. The proposed configuration provides a robust mix of solar and wind energy while enabling maximum utilization of sources, storage, and grid-tied capabilities.
Stability Enhancement of Pleiku Power System using a Distribution Static Sync...
This document discusses using a distribution static synchronous compensator (D-STATCOM) to enhance voltage stability and improve stability in the Pleiku Power System. It presents simulation results showing the effectiveness of a PI controller-based D-STATCOM in mitigating voltage oscillations and stabilizing voltage waveforms during faults. The D-STATCOM injects reactive current to correct voltage drops during disturbances. Simulation results demonstrate that the D-STATCOM improves voltage magnitude and stability at load buses under a three-phase short circuit fault.
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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.
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control strategy for achieving maximum benefits from the grid-interfacing inverters when installed in
3-phase 4-wire distribution systems. The inverter can thus be utilized as: 1) power converter to inject
power to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics and
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simultaneously. This new control concept is demonstrated with extensive MATLAB/Simulink
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Solar energy hasbecomepopular nowadays and desire for clean energy. Since the solar radiation on no occasion remains constant,it keeps on insecure throughout the day. The need of the hour is to distribute a constant voltage to the grid irrespective of the deviation in temperatures and solar insolation. The inverter is designed from a boost converter along with a line frequency. The voltage from the boost converter is fedto the grid through inverter. In this proposed method high efficiency can be achievedby using only one switch functioning at high frequency at a time. The converter uses IGBT and ultra-fast reverse recovery diode. The simulation and experiment results are verified using MATLAB/Simulink software.
Enhancement of power quality in distribution system by using D-STATCOM
The document is a thesis submitted by three students for their Bachelor's degree in Electrical Engineering. It discusses enhancing power quality in a distribution system using a D-STATCOM (Distribution Static Compensator). The thesis is classified as confidential and contains restricted information as specified by the University of Hormuud. The students declare the work as their own, and acknowledge the university's rights over the thesis.
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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.
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This document summarizes a research paper that proposes a controller for a bidirectional converter to interface an ultracapacitor with renewable energy sources. The controller integrates both Peak Current Mode Control and Linear Quadratic Regulator methods. Simulation results show that the controller achieves good DC bus voltage regulation under different operating conditions of the bidirectional converter, and ensures smooth transition between the buck and boost modes. The controller is designed to improve the reliability and energy efficiency of renewable energy systems by utilizing an ultracapacitor for energy storage.
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1) The document describes a bidirectional isolated DC-DC converter for renewable power systems. The proposed converter uses a coupled inductor with the same winding turns on the primary and secondary sides, allowing for higher step-up and step-down voltage gains than conventional bidirectional converters.
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A comprehensive review on D-FACTS devices
Flexible ac transmission systems (FACTSs) and voltage-source converters, with smart dynamic controllers, are emerging as a stabilization and power filtering equipment to improve the power quality. Also, distributed FACTSs play an important role in improving the power factor, energy utilization, enhancing the power quality, and ensuring efficient energy utilization and energy management in grids. This paper presents a literature survey of FACTS technology tools and applications for power quality and efficient utilization of electric system. There are some drawbacks of FACTS devices. These drawbacks can be fulfilled by using new compound, scalable, light weighted and cost effective devices that are distributed-FACTS (D-FACTS). D-FACTS controllers are distributed version of conventional lumped FACTS controllers and their cost is low due to lower ratings of component and reliability also increases due to redundancy of devices. The Enhanced Power Flow Controller (EPFC) is a D-FACTS controller which is distributed version of thyristor controlled series controller. DPFC controllers are used in series at small distance gap at every 5-10 km distance with transmission line to control the power flow. This paper discusses extensive review of the DPFC controller and its application in modern power system era. Zeba Akram"A comprehensive review on D-FACTS devices" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018, URL: http://www.ijtsrd.com/papers/ijtsrd11649.pdf http://www.ijtsrd.com/engineering/electrical-engineering/11649/a-comprehensive-review-on-d-facts-devices/zeba-akram
Grid connected forward microinverter with primary-parallel secondary-series t...
This paper proposes a microinverter with a primary-parallel secondary-series multi-core transformer for photovoltaic modules. The microinverter uses constant off-time boundary mode control to provide maximum power point tracking and unity power factor. The multi-transformer design allows for low-profile unitary turns ratio transformers that are better coupled, improving the microinverter's overall performance. The multiphase solution increases the number of devices but reduces the current stress and losses per device, enabling easier thermal management. Furthermore, the decoupling capacitor is split among phases, allowing for a low-profile design without electrolytic capacitors that can be mounted directly on a PV module frame.
Iittjr
This document summarizes a research paper on custom power devices used for power quality improvement. It discusses various power quality issues at distribution levels and introduces different types of custom power devices classified as network reconfiguring devices and compensating devices. Network reconfiguring devices include solid state current limiters, static transfer switches, solid state breakers, and uninterruptible power supplies. Compensating devices include distribution static compensators (DSTATCOM), dynamic voltage restorers (DVR), and unified power quality compensators (UPQC). Their applications, working principles, and simulation results are briefly explained through diagrams and tables. The paper concludes that custom power devices provide effective solutions for various power quality disturbances at distribution levels.
2
This document presents a study on a nine-level diode-clamped multilevel inverter. A diode-clamped multilevel inverter uses multiple DC voltage levels from separate capacitors to generate stepped output voltages. The proposed nine-level inverter configuration is capable of producing nine distinct output voltage levels. Simulation results show that the total harmonic distortion of the nine-level inverter is 7.84%, lower than the 10.47% THD of a seven-level inverter. Pulse width modulation techniques are used to generate switching signals to control the inverter. The study concludes that increasing the number of voltage levels in a diode-clamped multilevel inverter reduces total harmonic distortion.
STATCOM A Review on Different Configurations and Topologies
Synchronous static compensators STATCOMs have been presented as a member of flexible alternating current transmission systems devices family in both distribution and transmission levels, namely distribution STATCOM and transmission STATCOM, respectively. These compensators have an important role in increasing the power quality in power systems because of having features investigated in various studies and because of the proper implementation of power functions, especially in compensating the voltage flicker. Studies on STATCOM can be categorized in two different parts. The first part is about the various topologies of the electronic converters used in the compensator and different arrangements of the coupling transformers with the network, which can be named as the power part. The second part is about theorizing at the control level, which eventually ends in producing the proper gate signals to control the switching of the electronic power switches in the power part. Considering the fact that two comprehensive reviews on STATCOM have been published in 2002 and 2009, this paper based on the aforementioned categorization reviews the studies fulfilled in the field of synchronous static compensator, especially the relevant studies in recent years published in creditable journals. The paper makes connections among the control methods and compares the ideas about power stage from different perspectives, so that conducted studies will be organized in a systematic order. Simranpreet Singh "STATCOM: A Review on Different Configurations and Topologies" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-2 , February 2019, URL: https://www.ijtsrd.com/papers/ijtsrd20315.pdf
Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/20315/statcom-a-review-on-different-configurations-and-topologies/simranpreet-singh
Segan
This document summarizes a research paper that proposes a power quality enhancement technique for a grid-connected hybrid power system using a distributed power flow controller (DPFC) with a coordinated power quality (PQ) theory and fractional order PID controller. The DPFC consists of both shunt and series controllers to mitigate voltage sags, swells, and current harmonics in the distribution system. Simulation results show that the proposed DPFC with FOPID controller provides better voltage profile improvement and compensation compared to controllers like PI, FUZZY, and ANFIS. A case study on an IEEE 12 bus system also demonstrates the superior performance of the DPFC in terms of voltage compensation and harmonics reduction.
Mitigation of Voltage Fluctuations in Power System Using STATCOM
Wind energy being a renewable source of energy is enjoying a rapid growth globally. However, wind energy being an uncontrollable source of energy coupled with the fact that it uses distributed induction generators for power conversion poses a challenge in integrating a large scale wind-farm into a weak power system. An actual weak power system with two large Wind-Farms (WFs) coupled to it is introduced as part of this study. A model of this integrated system along with a STATCOM for steady state and dynamic impact study is developed in the MATLAB/Simulink environment. The power quality issues are highlighted and a centralized STATCOM is proposed to solve the issue of the voltage fluctuations in particular in addition to addressing the other issues. Based on the results obtained from the simulation, the system voltage control issues are analyzed and the location of STATCOM is assessed. Finally, a STATCOM control strategy for suppression of voltage fluctuations is presented.
Optimal Capacitor Placement in Distribution System using Fuzzy Techniques
To improve the overall efficiency of power system,
the performance of distribution system must be improved. It
is done by installing shunt capacitors in radial distribution
system. The problem of capacitor allocation in electric
distribution systems involves maximizing “energy and peak
power (demand) loss reductions” by means of capacitor
installations. As a result power factor of distribution system
improves. There is also lots of saving in terms of money. A 10
bus radial distribution system is taken as the model. Then a
load flow programs is executed on MATLAB. Then by using
load flow data & fuzzy techniques the determination of suitable
location of capacitor placement and its size is done. Shunt
capacitors to be placed at the nodes of the system will be
represented as reactive power injections. Fuzzy techniques have
advantages of simplicity, less computations & fast results. The
same techniques can be applied to complex distribution systems
& dynamic loads.
Improving the Stability of Cascaded DC Power Supply System by Adaptive Active...
Abstract: When all links are changes in the cascade is the corner of the shape in the dc division
energy orbit (DEO). When resistances are intermission betwixt one by one stylish changes in that
would possibly end up so the cascaded orbits are unsteady. They are antecedent we can place in a
nearer to the useful in the cascaded orbit can be got in compelled to vary the supply they have load
changes in the internal structure of the same regions in the electrical device they can be opposed in
a quality of the characteristic of dc DEO. Throughout the Associate in nursing adaptation active
device in the (AACC) we can know another determined in the cascaded orbit. Therefore the AACC
was connected by side by side in the cascaded orbit’s they can mediate in between the carries and
completely a requirement of a notice then they carries the voltage with none modification in this
subsystems. Then it will have a stylish to the customary have basic units to measuring in the dc
DEO. When the AACC is additionally a similar bus device to cut back the output resistance of the
supply device, therefore averting in a interiority have their load changes in the input resistance, of
the cascaded orbit have their solutions then they becomes constant. We have important carrier
device it will computing in the AACC adaptation in line with they have output energy to the
cascaded orbit, they have energy vesting in the AACC that’s way they will reduced and therefore
they have a lot of energy in a reacting to the orbit so it is a best in the orbit of a submissive device.
What\'s many, since no capacitance have a requirement among an AACC, when the cascaded orbits
have their quantity of it slowly it will extend in time. They have activity fundamental truth to stop
their magnificence thought in the AACC are mentioned throughout of this project, it can have four
thousand eight hundred and zero watts cascaded orbit was contain a strive of process to move in a
full-bridge changes they can be styli shed and evaluated. So when the simulation solutions have to
clear the performance of the arrangement of AACC.
Hybrid Power Supply using Improved H6 based MITCB DC – DC Converter for House...
This document presents a hybrid power supply system using an improved H6-based multi-input transformer-coupled bidirectional DC-DC converter for household applications. The system integrates photovoltaic, wind, and battery sources along with a single-phase H6 inverter to power AC loads and connect to the grid. It aims to meet load demand, manage excess power from sources, charge the battery from sources and grid as needed, and reduce energy conversion stages for improved efficiency. Simulation results show the control scheme effectively manages power flow under different operating conditions. The proposed configuration provides a robust mix of solar and wind energy while enabling maximum utilization of sources, storage, and grid-tied capabilities.
Stability Enhancement of Pleiku Power System using a Distribution Static Sync...
This document discusses using a distribution static synchronous compensator (D-STATCOM) to enhance voltage stability and improve stability in the Pleiku Power System. It presents simulation results showing the effectiveness of a PI controller-based D-STATCOM in mitigating voltage oscillations and stabilizing voltage waveforms during faults. The D-STATCOM injects reactive current to correct voltage drops during disturbances. Simulation results demonstrate that the D-STATCOM improves voltage magnitude and stability at load buses under a three-phase short circuit fault.
A scheme for the power control in a dfig connected to a dc bus via a diode re...
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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.
A CONTROL APPROACH FOR GRID INTERFACING INVERTER IN 3 PHASE 4 WIRE DISTRIBUT...
With the increase in load demand, the Renewable Energy Sources (RES) are
increasingly connected in the distribution systems which utilizes power electronic
Converters/Inverters. Nowadays, 3-phase 4-wire distribution power system has been widely used in
residential and office buildings, manufacturing facilities, schools etc This paper presents a novel
control strategy for achieving maximum benefits from the grid-interfacing inverters when installed in
3-phase 4-wire distribution systems. The inverter can thus be utilized as: 1) power converter to inject
power to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics and
load neutral current. All of these functions may be accomplished either individually or
simultaneously. This new control concept is demonstrated with extensive MATLAB/Simulink
simulation studies
Mitigation of Fault in the Distribution System by using Flexible Distributed ...
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.
High Proficiency Grid ConnectedPhotovoltaic Power Generation System
Solar energy hasbecomepopular nowadays and desire for clean energy. Since the solar radiation on no occasion remains constant,it keeps on insecure throughout the day. The need of the hour is to distribute a constant voltage to the grid irrespective of the deviation in temperatures and solar insolation. The inverter is designed from a boost converter along with a line frequency. The voltage from the boost converter is fedto the grid through inverter. In this proposed method high efficiency can be achievedby using only one switch functioning at high frequency at a time. The converter uses IGBT and ultra-fast reverse recovery diode. The simulation and experiment results are verified using MATLAB/Simulink software.
Enhancement of power quality in distribution system by using D-STATCOM
The document is a thesis submitted by three students for their Bachelor's degree in Electrical Engineering. It discusses enhancing power quality in a distribution system using a D-STATCOM (Distribution Static Compensator). The thesis is classified as confidential and contains restricted information as specified by the University of Hormuud. The students declare the work as their own, and acknowledge the university's rights over the thesis.
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A method for balancing the supply and demand in an isolated system consisting of voltage control type inverters in friends
- 1. A Method for Balancing the Supply and Demand in an Isolated System Consisting of Voltage Control Type Inverters in FRIENDS
- 2. Flexible, Reliable and Intelligent Energy Delivery System(FRIENDS) The FRIENDS aims to realize an uninterruptible power supply by using the DG/ESS as backup generators. Distributed Generators(DG) DG has complementary characteristics: slow response and sustainable generation ability. Dispatch supplying power among the two sources. Energy Storage System(ESS) Energy constraints regarding charging and discharging operations. “The DG and ESS play the role of backup generator in the isolated system.”
- 5. Functions of FRIENDS Flexibility in reconfiguration of the system by a flexible switching operation in normal, emergency. and restorative stales, through dispersed information processing and power electronics facilities. A basically non-interruptive power supply by connecting to multiple power sources and utilizing dispersed power resources and energy storage. Multiple menu service to allow customers to select the quality of power and choose suppliers by introducing the concept of the "power quality improvement (control) center”. Load levelling and energy conservation by demand-side management, dispersed power resources, and energy storage. Enhancement of information services lo customers. Efficient demand-side management.
- 6. QCC
- 8. Balancing the supply and demand in an isolated system Decoupling When a load in the isolated system changes, voltage drop along the transformers and the reactor also changes. As a result, voltage at the point of common coupling (PCC) changes and real and reactive power flows among QCCs emerge. In order to satisfy the operational policy it is necessary to adjust and
- 9. Real Power Balancing 1) Short term balancing In order to mitigate the burdens of DG and ESS, the proposed method is designed so that the short-term component of load changes can be compensated by all QCCs in the isolated system. 2) Medium term balancing The purpose of a governor-free operation is to temporarily compensate for a steep load change by all QCCs in the isolated system. Therefore, compensation by the other QCCs should be readjusted so that the principle of self-supply can be achieved. This readjustment is called medium-term balancing.
- 10. 3) Long term balancing In this case, if the capacity of QCC was short, its own load would be shed according to the predefined order of priorities. Reactive Power Balancing As stated in the previous section, voltage magnitude at the PCC also changes when the connected load changes. Therefore, reactive power flows among the QCCs appearas realpower flows do. In order to stabilize voltage magnitude at the PCC and eliminate the reactive power flows among QCCs.
- 11. Allocation of Inverter Capacity 1) Prioritized Capacity Allocation for Real Power 2) Prioritized Capacity Allocation for Reactive Power
- 12. Technology To Be Developed To Realize FRIENDS Static switching facilities. New high-Ievel communication procedures. Efficient demand-side management systems and evaluation methods. On-line power pricing and on-line meter reading system. Optimal operation of small-scale dispersed generators.
- 13. Conclusion Improvement in reliability. FRIENDS can offer various levels of quality of supply for its customers. Flexible reconfiguration in emergency operation deployed by fast static-type switches is another advantage of the concept.