Modeling and simulation of three phases cascaded H-bridge grid-tied PV inverterjournalBEEI
In this paper a control scheme for three phase seven level cascaded H-bridge inverter for grid tied PV system is presented. As power generation from PV depends on varing environmental conditions, for extractraction of maximum power from PV array, fuzzy MPPT controller is incorporated with each PV array. It gives fast and accurate response. To maintain the grid current
sinusoidal under varying conditions, a digital PI controller scheme is adopted. A MATLAB/Simulink model is developed for this purpose and results are presented. At last THD analysis is carried out in order to validate the performance of the overall system. As discussed, with this control strategy the balanced grid current is obtained keeping THD values with in the specified range of IEEE-519 standard.
The study made in this paper concerns the use of the voltage-oriented control (VOC) of three-phase pulse width modulation (PWM) rectifier with constant switching frequency. This control method, called voltage-oriented controlwith space vector modulation (VOC-SVM). The proposed control scheme has been founded on the transformation between stationary (α-β) and and synchronously rotating (d-q) coordinate system, it is based on two cascaded control loops so that a fast inner loop controls the grid current and an external loop DC-link voltage, while the DC-bus voltage is maintained at the desired level and ansured the unity power factor operation. So, the stable state performance and robustness against the load’s disturbance of PWM rectifiers are boths improved. The proposed scheme has been implemented and simulated in MATLAB/Simulink environment. The control system of the VOC-SVM strategy has been built based on dSPACE system with DS1104 controller board. The results obtained show the validity of the model and its control method. Compared with the conventional SPWM method, the VOC-SVM ensures high performance and fast transient response.
Comparative Study of Three Phase Grid Connected Photovoltaic Inverter Using P...IJPEDS-IAES
A comparative study of three phase grid connected photovoltaic (PV)
inverter using Proportional-Integral (PI) controller and Fuzzy logic controller
(FLC) is presented in this paper. Proposed three phase inverter with single DC
source employing three phase transformer for grid connected PV system
controlled by using space vector pulse width modulation (SVPWM) technique.
PI and FLC are used as current controller for regulating the current. Perturb and
observe maximum power point technique (MPPT) is used for tracking of
maximum power from the PV panel. Finally total harmonic distortion (THD)
comparison made between two controllers for validation of results.
Furthermore swithing losses of inverter are also presented. The simulation
results are obtained using MATLAB simulink.
Modeling and simulation of three phases cascaded H-bridge grid-tied PV inverterjournalBEEI
In this paper a control scheme for three phase seven level cascaded H-bridge inverter for grid tied PV system is presented. As power generation from PV depends on varing environmental conditions, for extractraction of maximum power from PV array, fuzzy MPPT controller is incorporated with each PV array. It gives fast and accurate response. To maintain the grid current
sinusoidal under varying conditions, a digital PI controller scheme is adopted. A MATLAB/Simulink model is developed for this purpose and results are presented. At last THD analysis is carried out in order to validate the performance of the overall system. As discussed, with this control strategy the balanced grid current is obtained keeping THD values with in the specified range of IEEE-519 standard.
The study made in this paper concerns the use of the voltage-oriented control (VOC) of three-phase pulse width modulation (PWM) rectifier with constant switching frequency. This control method, called voltage-oriented controlwith space vector modulation (VOC-SVM). The proposed control scheme has been founded on the transformation between stationary (α-β) and and synchronously rotating (d-q) coordinate system, it is based on two cascaded control loops so that a fast inner loop controls the grid current and an external loop DC-link voltage, while the DC-bus voltage is maintained at the desired level and ansured the unity power factor operation. So, the stable state performance and robustness against the load’s disturbance of PWM rectifiers are boths improved. The proposed scheme has been implemented and simulated in MATLAB/Simulink environment. The control system of the VOC-SVM strategy has been built based on dSPACE system with DS1104 controller board. The results obtained show the validity of the model and its control method. Compared with the conventional SPWM method, the VOC-SVM ensures high performance and fast transient response.
Comparative Study of Three Phase Grid Connected Photovoltaic Inverter Using P...IJPEDS-IAES
A comparative study of three phase grid connected photovoltaic (PV)
inverter using Proportional-Integral (PI) controller and Fuzzy logic controller
(FLC) is presented in this paper. Proposed three phase inverter with single DC
source employing three phase transformer for grid connected PV system
controlled by using space vector pulse width modulation (SVPWM) technique.
PI and FLC are used as current controller for regulating the current. Perturb and
observe maximum power point technique (MPPT) is used for tracking of
maximum power from the PV panel. Finally total harmonic distortion (THD)
comparison made between two controllers for validation of results.
Furthermore swithing losses of inverter are also presented. The simulation
results are obtained using MATLAB simulink.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Simulation of 3-phase matrix converter using space vector modulationIJECEIAES
This paper illustrates the simulation of 3-phase matrix converter using Space Vector Modulation (SVM). Variable AC output voltage engendered using matrix converter with bidirectional power switches controlled by appropriate switching pulse. The conventional PWM converter engenders switching common mode voltage across the load system terminals, which cause to common mode current and its leads to bearing failure in load drive. These problems can be rectified using SVM and which minimize the effect on the harmonic fluctuation in AC output voltage and stress on the power switch is reduced using bidirectional switch for proposed 3-phase matrix converter. The simulation results have been presented to validate the proposed system using matlab / simulink.
Control of inverters to support bidirectional power flow in grid connected sy...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
This manuscript deals with the simulation of AC - DC Zeta converter for high power drive application with greater efficiency, lesser losses and power factor correction. It involves simpler control circuitry with less external components. The explanation of Fundamental function of Zeta converter is given in this paper. To condense the harmonic content the PI, PID and Fuzzy Logic controller are used. The operation of Zeta converter in open loop, closed loop is obtained. Closed loop system of zeta converter proves better performance over open loop system. Open and closed loop circuits are simulated by using MATLAB simulink. By giving disturbance in closed loop and open loop systems, feat of Zeta converter is compared.
Power System Simulation Laboratory Manual Santhosh Kumar
Date:-(13-07-2016)
Hii friends
I Have Attached Our Power System Simulation Laboratory Manual Here for your Reference
Kindly download the Manual and Start Writing the Observation Note By Mr.G.Shivaraj-AP/EEE
Please follow it friends✌
With Happy,
Šαηтн๑zzζzz
SIMULATION OF REDUCED SWITCH INVERTER BASED UPQC WITH FUZZY LOGIC AND ANN CON...MABUSUBANI SHAIK
ABSTRACT
This paper presents a new methodology to reduce harmonic distortion in UPQC using artificial neural network
and fuzzy logic controller. So this paper main aim is improve power quality by using UPQC with ANN and FLC. The most purpose of the proposed (ANN & FLC) is capable of providing good static and dynamic performances compared to PI controller. The UPQC is to control on voltage flicker/unbalance, reactive power and harmonics. In different words, the UPQC has the potential of up power quality at the purpose of installation on power industrial power systems. The appliance of computing is growing quick within the space of power electronics and drives. From olden days to now days we are using twelve switches used in back to back configuration. But now we are using nine switches instead of 12
switches. In 9 switch UPQC converter given the most useful benefits compared to 12 switches power converter. The nine switches UPQC converter gets the best results by using of three methods. They are one is PI controller technique, ANN controller technique and FLC controller technique. By contrast PI, FLC and ANN, ANN is better than (FLC & PI) for power quality enhancement and voltage sag and voltage swell mitigations. The factitious neural network (ANN) is taken into account as a replacement tool to style management electronic equipment for power quality (PQ) devices. A whole
simulation study is administrated to analysis the performance of the ANN controller and compares its performance with the quality FLC & PI controller’s results. The nine-switch convertor has already been proved to possess sure benefits,
additionally to its part saving topological feature. Despite these benefits, the nine-switch convertor has thus far found restricted applications because of its several perceived performance tradeoffs like requiring associate degree outsized
dc-link capacitance, restricted amplitude sharing, and unnatural part shift between its 2 sets of output terminals. Rather than acceptive these tradeoffs as limitations, a nine-switch power conditioner is projected here that nearly “converts” most of those topological short comings into fascinating performance benefits. Aiming more to cut back its switch losses,
Harmonics, Voltage Sag & Swell associate degree acceptable discontinuous modulation theme is projected and studied here thoroughly to doubly make sure that top reduction of commutations is achieved. With associate degree suitably
designed management theme with PI and ANN with Fuzzy logic controller then incorporated, the nine-switch convertor is shown to favorably raise the general power quality in Simulation, thus justifying its role as an influence conditioner at a reduced value.
KEYWORDS: ANN, Active Power Filters, PI Controller, Nine Switch Converter, Power Quality, UPQC
Space Vector of Three Phase Three level Neutral Point Clamped Quasi Z Source ...IJTET Journal
Space vector of three phase three level neutral point clamped quasi z source inverter is proposed in this paper. Space vector modulation is the pulse width modulation consists of number of switching states. Space vector pulse width modulation technique utilizes 15% more power from DC source. Harmonics are reduced by the presence of switching states. Quasi Z-source inverter is advanced topologies which performs both boost and buck operation of a converter. The proposed inverter obtains continuous input current and the boost converter is not needed. So, maximum voltage can be obtained in the load and system complexity is reduced. Maximum power can be obtained from the solar panel by using MPPT. The implementation of MPPT is to operate a PV array under constant voltage and power reference to modify the duty cycle of the inverter.The simulation of proposed topology is done in MATLAB/SIMULINK software.
Modified Synchronous Reference Frame based Harmonic Extraction for Shunt Acti...IJPEDS-IAES
This paper presents the modified synchronous reference frame based Shunt
Active Filter (SAF) for the instantaneous compensation of harmonic current
present at the Point of Common Coupling. The harmonics generated by the
non linear load are extracted using the positive frame and negative frame of
the input signal using the modified synchronous reference frame theory with
extended Multiple Reference Frame based PLL (EMRFPLL). Based on the
harmonics extracted, pulse width modulation signals are generated using
Artificial Neural Network based Space Vector Pulse width Modulation
technique (ANNSVPWM). Using this switching technique the losses can be
reduced and compensation can be done more accurately The concept was
verified using MATLAB / Simulink Simulation and the results confirm the
THD at point of common coupling is below the required standards.
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 and Control of Switched-Inductor Quasi-Z-Source Inverter for Photovolt...irjes
The conventional Z-Source Inverter (ZSI) used for photovoltaic applications has certain
shortcomings such as high stress across the passive components and low boost factor. This paper presents the
design and analysis of three phase switched inductor quasi Z-source inverter (SL-QZSI) for photovoltaic (PV)
applications. The wide voltage gain and the compensation for dead time effect of SL-QZSI with the help of
shoot-through states makes it suitable for PV application. Modulation strategies such as Simple boost,
Maximum boost and Constant maximum boost control methods are investigated for the operation and control
of SL-QZSI. PV source is modeled in MATLAB and incremental & conductance MPPT algorithm is
implemented .Simulation of the SL-QZSI circuit powered by PV source is carried out by implementing
maximum boost control method and the performance parameters are discussed.
The transmission overhead line is one of the vital elements in the power system for transmitting the electrical energy. In the transmission, the disturbances are often occurred. In the conventional algorithm, alpha and beta (mode) currents generated by Clarke’s transformation are utilized to convert the signal of Discrete Wavelet Transform (DWT) to obtain the Wavelet Transform Coefficient (WTC) and the Wavelet Coefficient Energy (WCE). This study introduces a new algorithm, called Modified Clarke for fault detection and classification using DWT and Back-Propagation Neural Network (BPNN) based on Clarke’s transformation on transmission overhead line by adding gamma current in the system. Daubechies4 (Db4) is used as a mother wavelet to decompose the high frequency components of the signal error. Simulation is performed using PSCAD / EMTDC transmission system modeling and carried out at different locations along the transmission line with different types of fault, fault resistances, fault locations and fault of the initial angle on a given power system model. The simulated fault types are in the study are the Single Line to Ground, the Line To Line, the Double Line to Ground and the Three Phases. There are four statistic methods utilized in the present study to determine the accuracy of detection and classification of faults. The result shows that the best and the worst structures of BPNN occurred on the configuration of 12-24-48-4 and 12-12-6-4, respectively. For instance, the error using Mean Square Error Method. The Error Of Clarke’s, Without Clarke’s and Modified Clarke’s are 0.05862, 0.05513 and 0.03721 which are the best, respectively, whereas, the worst are 0.06387, 0.0753 and 0.052, respectively. This indicates that the Modified Clarke’s result is in the lowest error. The method is successfully implement can be utilized in the detection and classification of fault in transmission line by utilities and power regulation in power system planning and operation.
In this paper the multicarrier pulse width modulation (MCPWM) with multi value DC voltage source multilevel inverter is presented. These MLI’s are suitable in high voltage & high power application due to their ability to synthesize waveforms with better harmonic spectrum. Seven level inverter is simulated using MATLAB/Simulink. The use of Photovoltaic Cell as a DC source for the multilevel Inverter is proposed here.
Design and Simulation Analysis of Sliding Mode Controller for DC-DC Cuk Conve...IJMREMJournal
Due to compact size and fast dynamic response DC-DC converters are used to a great extent. DC-DC Cuk
converter has switching transients which leads to switching losses and harmonics generation. With a linear
controller like Proportional integral derivative (PID), the transients and oscillations under supply and load
variations cannot be controlled. So, it becomes necessary to use a nonlinear controller to make transient
performance of the converter stable increase its efficiency. A great advantage of this controller includes, it’s
based on large signal model of DC to DC converters hence its stability is not bounded by the size of the
interpretations around the working point. In this research work, simulation model of cuk converter with sliding
mode controller is developed and tested using MATLAB SIMULINK. Effectiveness of proposed sliding mode
controller for cuk converter is proved from simulation results.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Simulation of 3-phase matrix converter using space vector modulationIJECEIAES
This paper illustrates the simulation of 3-phase matrix converter using Space Vector Modulation (SVM). Variable AC output voltage engendered using matrix converter with bidirectional power switches controlled by appropriate switching pulse. The conventional PWM converter engenders switching common mode voltage across the load system terminals, which cause to common mode current and its leads to bearing failure in load drive. These problems can be rectified using SVM and which minimize the effect on the harmonic fluctuation in AC output voltage and stress on the power switch is reduced using bidirectional switch for proposed 3-phase matrix converter. The simulation results have been presented to validate the proposed system using matlab / simulink.
Control of inverters to support bidirectional power flow in grid connected sy...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
This manuscript deals with the simulation of AC - DC Zeta converter for high power drive application with greater efficiency, lesser losses and power factor correction. It involves simpler control circuitry with less external components. The explanation of Fundamental function of Zeta converter is given in this paper. To condense the harmonic content the PI, PID and Fuzzy Logic controller are used. The operation of Zeta converter in open loop, closed loop is obtained. Closed loop system of zeta converter proves better performance over open loop system. Open and closed loop circuits are simulated by using MATLAB simulink. By giving disturbance in closed loop and open loop systems, feat of Zeta converter is compared.
Power System Simulation Laboratory Manual Santhosh Kumar
Date:-(13-07-2016)
Hii friends
I Have Attached Our Power System Simulation Laboratory Manual Here for your Reference
Kindly download the Manual and Start Writing the Observation Note By Mr.G.Shivaraj-AP/EEE
Please follow it friends✌
With Happy,
Šαηтн๑zzζzz
SIMULATION OF REDUCED SWITCH INVERTER BASED UPQC WITH FUZZY LOGIC AND ANN CON...MABUSUBANI SHAIK
ABSTRACT
This paper presents a new methodology to reduce harmonic distortion in UPQC using artificial neural network
and fuzzy logic controller. So this paper main aim is improve power quality by using UPQC with ANN and FLC. The most purpose of the proposed (ANN & FLC) is capable of providing good static and dynamic performances compared to PI controller. The UPQC is to control on voltage flicker/unbalance, reactive power and harmonics. In different words, the UPQC has the potential of up power quality at the purpose of installation on power industrial power systems. The appliance of computing is growing quick within the space of power electronics and drives. From olden days to now days we are using twelve switches used in back to back configuration. But now we are using nine switches instead of 12
switches. In 9 switch UPQC converter given the most useful benefits compared to 12 switches power converter. The nine switches UPQC converter gets the best results by using of three methods. They are one is PI controller technique, ANN controller technique and FLC controller technique. By contrast PI, FLC and ANN, ANN is better than (FLC & PI) for power quality enhancement and voltage sag and voltage swell mitigations. The factitious neural network (ANN) is taken into account as a replacement tool to style management electronic equipment for power quality (PQ) devices. A whole
simulation study is administrated to analysis the performance of the ANN controller and compares its performance with the quality FLC & PI controller’s results. The nine-switch convertor has already been proved to possess sure benefits,
additionally to its part saving topological feature. Despite these benefits, the nine-switch convertor has thus far found restricted applications because of its several perceived performance tradeoffs like requiring associate degree outsized
dc-link capacitance, restricted amplitude sharing, and unnatural part shift between its 2 sets of output terminals. Rather than acceptive these tradeoffs as limitations, a nine-switch power conditioner is projected here that nearly “converts” most of those topological short comings into fascinating performance benefits. Aiming more to cut back its switch losses,
Harmonics, Voltage Sag & Swell associate degree acceptable discontinuous modulation theme is projected and studied here thoroughly to doubly make sure that top reduction of commutations is achieved. With associate degree suitably
designed management theme with PI and ANN with Fuzzy logic controller then incorporated, the nine-switch convertor is shown to favorably raise the general power quality in Simulation, thus justifying its role as an influence conditioner at a reduced value.
KEYWORDS: ANN, Active Power Filters, PI Controller, Nine Switch Converter, Power Quality, UPQC
Space Vector of Three Phase Three level Neutral Point Clamped Quasi Z Source ...IJTET Journal
Space vector of three phase three level neutral point clamped quasi z source inverter is proposed in this paper. Space vector modulation is the pulse width modulation consists of number of switching states. Space vector pulse width modulation technique utilizes 15% more power from DC source. Harmonics are reduced by the presence of switching states. Quasi Z-source inverter is advanced topologies which performs both boost and buck operation of a converter. The proposed inverter obtains continuous input current and the boost converter is not needed. So, maximum voltage can be obtained in the load and system complexity is reduced. Maximum power can be obtained from the solar panel by using MPPT. The implementation of MPPT is to operate a PV array under constant voltage and power reference to modify the duty cycle of the inverter.The simulation of proposed topology is done in MATLAB/SIMULINK software.
Modified Synchronous Reference Frame based Harmonic Extraction for Shunt Acti...IJPEDS-IAES
This paper presents the modified synchronous reference frame based Shunt
Active Filter (SAF) for the instantaneous compensation of harmonic current
present at the Point of Common Coupling. The harmonics generated by the
non linear load are extracted using the positive frame and negative frame of
the input signal using the modified synchronous reference frame theory with
extended Multiple Reference Frame based PLL (EMRFPLL). Based on the
harmonics extracted, pulse width modulation signals are generated using
Artificial Neural Network based Space Vector Pulse width Modulation
technique (ANNSVPWM). Using this switching technique the losses can be
reduced and compensation can be done more accurately The concept was
verified using MATLAB / Simulink Simulation and the results confirm the
THD at point of common coupling is below the required standards.
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 and Control of Switched-Inductor Quasi-Z-Source Inverter for Photovolt...irjes
The conventional Z-Source Inverter (ZSI) used for photovoltaic applications has certain
shortcomings such as high stress across the passive components and low boost factor. This paper presents the
design and analysis of three phase switched inductor quasi Z-source inverter (SL-QZSI) for photovoltaic (PV)
applications. The wide voltage gain and the compensation for dead time effect of SL-QZSI with the help of
shoot-through states makes it suitable for PV application. Modulation strategies such as Simple boost,
Maximum boost and Constant maximum boost control methods are investigated for the operation and control
of SL-QZSI. PV source is modeled in MATLAB and incremental & conductance MPPT algorithm is
implemented .Simulation of the SL-QZSI circuit powered by PV source is carried out by implementing
maximum boost control method and the performance parameters are discussed.
The transmission overhead line is one of the vital elements in the power system for transmitting the electrical energy. In the transmission, the disturbances are often occurred. In the conventional algorithm, alpha and beta (mode) currents generated by Clarke’s transformation are utilized to convert the signal of Discrete Wavelet Transform (DWT) to obtain the Wavelet Transform Coefficient (WTC) and the Wavelet Coefficient Energy (WCE). This study introduces a new algorithm, called Modified Clarke for fault detection and classification using DWT and Back-Propagation Neural Network (BPNN) based on Clarke’s transformation on transmission overhead line by adding gamma current in the system. Daubechies4 (Db4) is used as a mother wavelet to decompose the high frequency components of the signal error. Simulation is performed using PSCAD / EMTDC transmission system modeling and carried out at different locations along the transmission line with different types of fault, fault resistances, fault locations and fault of the initial angle on a given power system model. The simulated fault types are in the study are the Single Line to Ground, the Line To Line, the Double Line to Ground and the Three Phases. There are four statistic methods utilized in the present study to determine the accuracy of detection and classification of faults. The result shows that the best and the worst structures of BPNN occurred on the configuration of 12-24-48-4 and 12-12-6-4, respectively. For instance, the error using Mean Square Error Method. The Error Of Clarke’s, Without Clarke’s and Modified Clarke’s are 0.05862, 0.05513 and 0.03721 which are the best, respectively, whereas, the worst are 0.06387, 0.0753 and 0.052, respectively. This indicates that the Modified Clarke’s result is in the lowest error. The method is successfully implement can be utilized in the detection and classification of fault in transmission line by utilities and power regulation in power system planning and operation.
In this paper the multicarrier pulse width modulation (MCPWM) with multi value DC voltage source multilevel inverter is presented. These MLI’s are suitable in high voltage & high power application due to their ability to synthesize waveforms with better harmonic spectrum. Seven level inverter is simulated using MATLAB/Simulink. The use of Photovoltaic Cell as a DC source for the multilevel Inverter is proposed here.
Design and Simulation Analysis of Sliding Mode Controller for DC-DC Cuk Conve...IJMREMJournal
Due to compact size and fast dynamic response DC-DC converters are used to a great extent. DC-DC Cuk
converter has switching transients which leads to switching losses and harmonics generation. With a linear
controller like Proportional integral derivative (PID), the transients and oscillations under supply and load
variations cannot be controlled. So, it becomes necessary to use a nonlinear controller to make transient
performance of the converter stable increase its efficiency. A great advantage of this controller includes, it’s
based on large signal model of DC to DC converters hence its stability is not bounded by the size of the
interpretations around the working point. In this research work, simulation model of cuk converter with sliding
mode controller is developed and tested using MATLAB SIMULINK. Effectiveness of proposed sliding mode
controller for cuk converter is proved from simulation results.
Power Quality Compensation in Distribution System based on Instantaneous Powe...IJECEIAES
In this paper, the power quality compensation problems such as current harmonics and system load's reactive power are considered. In this context, we use static distribution synchronous compensator to inject compensation current into the system, which its reference current signals have been derived from the instantaneous power theory. To improve the current control operation and fast tracking of reference signals, a PI recursive controller has been used which is able to reduce to zero tracking error compared to its conventional type. The performance of the controller is delayed for a period; to overcome this problem, the phase rules have been used to adjust the controller parameters to increase the control performance speed. Finally, in simulation we used Matlab / Simulink software, which has been proven to be better than conventional PI controller-based compensation for power quality.
Comparison of Soft Computing Techniques applied in High Frequency Aircraft Sy...ijeei-iaes
Sinusoidal Current Control strategy for extracting reference currents for shunt active power filters have been optimized using Fuzzy Logic control and Adaptive Tabu search Algorithm and their performances have been compared. The acute analysis of Comparison of the compensation capability based on THD and speedwell be done, and recommendations will be given for the choice of technique to be used. The simulated results using MATLAB model are shown, and they will undoubtedly prove the importance of the proposed control technique of aircraft shunt APF.
PI and fuzzy logic controllers for shunt active power filterISA Interchange
This paper presents a shunt Active Power Filter (APF) for power quality improvements in terms of harmonics and reactive power compensation in the distribution network. The compensation process is based only on source current extraction that reduces the number of sensors as well as its complexity. A Proportional Integral (PI) or Fuzzy Logic Controller (FLC) is used to extract the required reference current from the distorted line-current, and this controls the DC-side capacitor voltage of the inverter. The shunt APF is implemented with PWM-current controlled Voltage Source Inverter (VSI) and the switching patterns are generated through a novel Adaptive-Fuzzy Hysteresis Current Controller (A-F-HCC). The proposed adaptive-fuzzy-HCC is compared with fixed-HCC and adaptive-HCC techniques and the superior features of this novel approach are established. The FLC based shunt APF system is validated through extensive simulation for diode-rectifier/R–L loads.
Unified Power Quality Conditioner Model Based with Series and Shunt FiltersIAES-IJPEDS
With the increase of the complexion in the power distribution system, it is very possible that several kinds of power quality disturbances are happened in a power distribution system simultaneously.This paper proposes a unified power quality conditioner (UPQC) including a series and a shunt active power filter (APF) to compensate harmonics in both the distorted supply voltage and nonlinear load current. In the series APF control scheme, a proportional-integral (PI) controller, meanwhile a PI controller and are designed in the shunt APF control scheme to relieve harmonic currents produced by nonlinear loads. The DC voltage is maintained constant using Two degree of freedom proportional integral voltage controller (2DoFPI). The performance of the proposed UPQC is significantly improved compared to the conventional control strategy. The feasibility of the proposed UPQC control scheme is validated through the simulations.
An Improved Double Fuzzy PI Controller For Shunt Active Power Filter DC Bus R...IJPEDS-IAES
This paper targets to demonstrate the importance of the choice of the
algorithm references detection to be applied with a double fuzzy PI corrector
(DFPI) for the control and the regulation of a shunt active power filter
(SAPF) DC bus voltage. In a previous work, the synchronous reference
frame (SRF) algorithm was applied and gave satisfactory results. In the
present paper, the SRF is compared to the positive sequence of the
fundamental of the source voltage algorithm (PSF) which offered better
results regarding the power quality of the considered main utility feeding a
variable DC RL load throughout a diode bridge. The results were carried out
using computer simulation performed under MATLAB/Simulink
environment. To make the obtained results more convenient, a comparison
between the couples (SRF, PI), (PSF, PI), (SRF, DFPI), (PSF, DFPI) is added
to prove the effectiveness of the couple (PSF, DFPI) in satisfying the
compromise between a good regulation of the SAPF DC bus voltage and a
good quality of filtering resulting in an improved quality of power.
International Journal of Engineering Research and Development (IJERD)IJERD Editor
We would send hard copy of Journal by speed post to the address of correspondence author after online publication of paper.
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Power Quality Improvement in Distribution System using ANN Based Shunt Active...IAES-IJPEDS
This paper focuses on an Artificial Neural Network (ANN) controller based Shunt Active Power Filter (SAPF) for mitigating the harmonics of the distribution system. To increase the performance of the conventional controller and take advantage of smart controllers, a feed forward-type (trained by a back propagation algorithm) ANN-based technique is implemented in shunt active power filters for producing the controlled pulses required for IGBT inverter. The proposed approach mainly work on the principle of capacitor energy to maintain the DC link voltage of a shunt connected filter and thus reduces the transient response time when there is abrupt variation in the load. The entire power system block set model of the proposed scheme has been developed in MATLAB environment. Simulations are carried out by using MATLAB, it is noticed that the %THD is reduced to 2.27% from 29.71% by ANN controlled filter. The simulated experimental results also show that the novel control method is not only easy to be computed and implemented, but also very successful in reducing harmonics.
Closed Loop Non Linear Control of Shunt Hybrid Power Filter for Harmonics Mit...IAES-IJPEDS
In recent years, the amount of non-linear loads has increased considerably since there were improvements in power electronic equipment (such as adjustable speed drives or converter ac-dc, ac-ac, dc-ac and dc-dc) in industrial sectors which cause deterioration of the quality of the electric power supply through distortion of supply voltage and supply current. This has led to improvement of many stringent needs regarding generation of harmonic current, which are found in IEEE519 and IEC61000 standards. This paper proposes a non-linear function based closed loop control strategy (without load current extraction) for three-phase Shunt Active Power Line Conditioner and LC passive filter to compensate harmonics, power factor improvement and enhance the dynamic performance of Shunt Hybrid Power Filter (SHPF). By using a PI controller the DC bus voltage of the Shunt Active Power Filter is maintained constant. Results obtained from simulation shows the performance of expected hybrid filter in transient and steady state operation . This indicates that the controller is able to compensate even under severe load current imbalances.
The extensive use of non-linear loads in industry becomes increasingly a serious problem that affects the quality of energy delivered to customers. Therefore, the shunt active power filter (SAPF) has emerged as an important industrial tool to eliminate induced harmonic currents and compensating of reactive power. This paper proposes an improved control configuration for SAPF based on a modern technique called predictive direct power control (Predictive-DPC). The principle of this control is based on the direct regulation of the instantaneous active and reactive powers to guarantee a good energy quality on the grid side. For this purpose the appropriate average voltage vector which cancels power tracking errors is calculated by a simple predictive model at the bigining of each control period. This type of control includes various features such as the lack of look up table (LUTs) and closed current loops and the constant switching frequency is achieved through the use of PWM modulation. The results of the simulation process show a high performance in the steady and transient state function for predictive-DPC control that might be a reasonable alternative to conventional DPC in the field of active power filtering.
Simulation and Design of SRF based Control Algorithm for Three Phase Shunt Ac...idescitation
Active power filters are effective in mitigating line
current harmonics and compensating for the reactive power
in the line. There are basically two types of Active Power
Filters (APFs): shunt type and series type. Shunt active power
filters (SAPFs) represent the most important and most widely
used filters in industrial purposes, this is due not only to the
fact that eliminate the harmonic current but also they are
suitable for a wide range of power ratings. In this paper,
Synchronous Reference Frame (SRF) theory is employed to
calculate compensating currents while the three phase source
is feeding a highly non-linear load. The main objective is to
study and investigate the performance of Shunt active power
filter using SRF theory. The algorithm is simulated under
M ATLAB
7.8
environment
using
Simulinkand
SimPowerSystems toolbox. The results shown are within the
IEEE Standard 512-1992.
[9] a systematic parameter tuning of pi current controller for lcl type activ...Ngoc Dinh
Phuong Vu, Nam Hoang, Ngoc Nguyen, Quan Nguyen, Minh Tran;”A systematic parameter tuning of PI current controller for LCL-type active rectifiers under unbalanced grid voltage conditions”; Journal of Electrical Systems.
Performance Evaluation of GA optimized Shunt Active Power Filter for Constant...ijeei-iaes
Sinusoidal Current Control strategy for extracting reference currents for shunt active power filters have been modified using Genetic Algorithm and its performances have been compared. The acute analysis of Comparison of the compensation capability based on THD and speedwell be done, and recommendations will be given for the choice of technique to be used. The simulated results using MATLAB model are shown, and they will undoubtedly prove the importance of the proposed control technique of aircraft shunt APF.
COMPARISON ANALYSIS OF SHUNT ACTIVE FILTER AND TRANSFORMERLESS PARALLEL HYBRI...cscpconf
This research work presents the comparison analysis of Shunt Active Filter (SAF) with Parallel Hybrid Active Filter (PHAF). The performances of SAF and PHAF have been analyzed with PI controllers based on Synchronous Reference Frame theory. In each case, simulation is carried out for three phase unbalanced non liner load conditions. The advantages of the designed system and the proposed current reference calculation methods are verified by simulations using MATLAB Power system Toolbox.
Comparison analysis of shunt active filter and transformerless parallel hybri...csandit
This research work presents the comparison analysis of Shunt Active Filter (SAF) with Parallel
Hybrid Active Filter (PHAF). The performances of SAF and PHAF have been analyzed with PI
controllers based on Synchronous Reference Frame theory. In each case, simulation is carried
out for three phase unbalanced non liner load conditions. The advantages of the designed
system and the proposed current reference calculation methods are verified by simulations
using MATLAB Power system Toolbox.
A Novel Fuzzy Variable-Band Hysteresis Current Controller For Shunt Active Po...IDES Editor
This paper presents a novel fuzzy control scheme
applied to shunt active power filters for harmonic and reactive
power compensation. A TSK type fuzzy logic controller is
proposed for APF reference current generation. To control
the maximum switching frequency of the converter within
limit a novel fuzzy hysteresis band current controller is used.
The band height, based on fuzzy control principle is changed
with the value of supply voltage and slope of reference current
In this paper a new combination Radial Basis Function Neural Network and p-q Power Theory (RBFNN-PQ) proposed to control shunt active power filters (SAPF). The recommended system has better specifications in comparison with other control methods. In the proposed combination an RBF neural network is employed to extract compensation reference current when supply voltages are distorted and/or unbalance sinusoidal. In order to make the employed model much simpler and tighter an adaptive algorithm for RBF network is proposed. The proposed RBFNN filtering algorithm is based on efficient training methods called hybrid learning method.The method requires a small size network, very robust, and the proposed algorithms are very effective. Extensive simulations are carried out with PI as well as RBFNN controller for p-q control strategies by considering different voltage conditions and adequate results were presented.
Sensitive loads are widely used in industrial, which is the main cause of sag-swell and harmonics voltages problems that can affect the power quality. Among the devices that solve such power quality perturbations, the series active power Filter APFS is considered in this paper. Thus, a single phase APFS is developed through an analytic analysis, supported by an experimental validation, where we applied classical proportional integrator PI, fuzzy logic FLC and sliding mode SM controllers to improve the dynamic response of the APFS. In addition, a comparative study between these control strategies has made in order to mitigate voltage sag-swell and especially harmonics, where the SMC has showed more effective and robust results compared to PI and FLC and proved by the Total harmonic distortion THD ratio. Results of the proposed controllers are simulated in MATLAB simulink® and validated through experimental tests applied on our system prototype.
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K1102016673
1. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
e-ISSN: 2278-1676,p-ISSN: 2320-3331, Volume 11, Issue 2 Ver. I (Mar. – Apr. 2016), PP 66-73
www.iosrjournals.org
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 66 | Page
Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
Yasser A. Elshrief1
, Galal A. Atlam2
, Belal A. Abozalalm3
1,2,3
(Industrial Electronics And Automatic Control Engineering, Department, FAE.,Menofiua University, Egypt)
Abstract: In this paper, Harmonic distortion, lower efficiency and poor power factor caused by nonlinear
loads can be compensated and improved by applying Fuzzy Logic Controller (FLC)(Takagi-Sugeno (TS)-type)
to a three-phase Shunt Active Power Filter (SAPF).
Unlike conventional controllers like Proportional-Integral (PI) controller, discussed in many papers, FLCs
cover a wider range of operating conditions and does not require any mathematical model of the system.
This controller is used to generate the desired reference current and maintains the dc-side capacitor voltage of
the inverter nearly constant.
Further, in this paper, the hysteresis current control mode of operation is implemented as a pulse width-
modulation technique for switching signal generation.
Practical design considerations will be presented using MATLAB/SIMULINK showing that the dynamic
behavior of the FLC (TS) is better than the conventional (PI) controller as it has a strong robustness to changes
in load and other system parameters.
Keywords: Active Power Filter, Harmonics, hysteresis control, Power Quality, Takagi-Sugeno Fuzzy control
I. Introduction
In recent years, the widely usage of electronic equipment produces a lot of harmonics in the power
distribution systems because of non-sinusoidal currents consumed by non-linear loads, such as inverters,
Switching power supplies, diode-rectifiers, thyristors converters, uninterruptible power supplies and adjustable
speed drives, etc.
All of these non-linear loads resulting in a lot of Power Quality (PQ) problems such as harmonic
distortion of supply current /voltage, low system efficiency, poor power factor, excessive heating in
transformers and equipment failure due to over voltages caused by the resonance between the impedance of the
equipment and the whole Transmission system [1, 2].
Earlier To avoid these undesirable effects, passive L-C power filters were used, but it has some drawbacks as
the limitations of fixed compensation, large size, resonance with the grid and their inability to adapt to network
characteristic variation. So the SAPF based on Voltage Source Inverter (VSI) structure is an attractive solution
to harmonic Current problems [3-5]. It is connected in parallel with the non-linear load, injecting specific
currents components that cancel the harmonic currents components caused by the nonlinear loads [6].
However, the conventional PI controller was used for obtaining a reference current template. It
requires precise linear mathematical models of the system, which are difficult to obtain and fails to perform
satisfactorily under parameter Variations, nonlinearity load disturbance.
Recently, (FLCs) have generated a good deal of interest in certain applications [7]. The advantages of FLCs
over conventional controllers are that they do not need an accurate mathematical model, they can work with
linguistics inputs, can handle linearity, and they are more robust than conventional nonlinear controllers [8].
Two types of fuzzy controllers are reported in practice- Mamdani type and Takagi-Sugeno (TS) type.
As stated earlier in [9] to the same case Mamdani type fuzzy controllers used for the control of APF gives better
results compared with the PI controller [10], but it has the drawbacks of a larger number of fuzzy sets and rules
and thus needs to optimize larger number of coefficients, demands large computation time and may not be
useful for real time application with small sampling time. On the other side, superiority of TS fuzzy controllers
lies in smaller number of fuzzy sets and rules set and hence reduction in computation time.
The performance of APF depends mainly on harmonic detection and current control method used to
inject the desired compensation current into the line [10, 11]. Two main approaches are used for reference
compensating current estimation: Frequency domain using Fast Fourier Transformation or Time domain with its
different techniques. Time domain method (Instantaneous Reactive-power theory) for APF harmonic current
references generation will be used because they require less calculation .There are many techniques which are
used to generate pulses for APF switches, and we use the Hysteresis band control [12] because of its simplicity
of Implementation, fast transient response, suitable stability and high accuracy.
In this paper, the two ways discussed to maintain a DC voltage across the Capacitor of the dc link
fixed, are classical PI Controller and Fuzzy logic controller.
At the end of the paper, a comparison between the performance of PI controller and fuzzy controller is
performed.
2. Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 67 | Page
II. Instantaneous Reactive-Power Theorem (IRPT) Or (P-Q Theory) For Compensation
Reference Current Estimation:
Through this method, the compensation reference current is generated from the instantaneous active
and reactive power of the non-linear load, which consists of a DC component and an AC component. With the
help of HPF, the AC component of the instantaneous active power is extracted. Finally taking inverse
transformation to obtain the compensation reference signals as shown in fig.1
Fig (1) Block diagram of APF based on (p-q) theory
Based on algebraic transformation (Clarke transformation) the p-q theory first transformed three phase
voltage and current waveforms from the a-b-c coordinates to α-β-coordinates and then defines instantaneous
active and reactive power on these coordinates.
𝑣 𝛼
𝑣 𝛽
=
2
3
1 −1/2 −1/2
0 3 2 − 3 2
𝑣 𝑎
𝑣 𝑏
𝑣 𝑐
(1)
𝑖 𝐿𝛼
𝑖 𝐿𝛽
=
2
3
1 −1/2 −1/2
0 3 2 − 3 2
𝑖 𝐿𝑎
𝑖 𝐿𝑏
𝑖 𝐿𝑐
(2)
Using eq (1), (2) to calculate The instantaneous active and reactive powers p and q
𝑝 = 𝑝 + 𝑝
𝑞 = 𝑞 + 𝑞
=
𝑣 𝛼 𝑣 𝛽
−𝑣 𝛽 𝑣 𝛼
𝑖 𝛼
𝑖 𝛽
(3)
The compensating reference currents are calculated by taking the inverse of Eq. (3) after the process of filtering
of the instantaneous active power (p) by H.P.F to pass only the AC components
𝑖∗
𝑐𝛼
𝑖∗
𝑐𝛽
=
1
𝑣2
𝛼 + 𝑣2
𝛽
𝑣 𝛼 −𝑣 𝛽
𝑣 𝛽 𝑣 𝛼
𝑝 + 𝑝 𝑙𝑜𝑠𝑠
𝑞
(4)
Taking inverse transformation for eq (4)
𝑖∗
𝑐𝑎
𝑖∗
𝑐𝑏
𝑖∗
𝑐𝑐
=
2
3
1 0
−1/2 3 2
−1/2 − 3 2
𝑖∗
𝑐𝛼
𝑖∗
𝑐𝛽
(5)
III. Proposed Fuzzy Control Scheme
FLCs are an excellent choice when precise mathematical formula calculations are impossible.
In order to implement the control algorithm of a SAPF in a closed loop, the dc capacitor voltage( 𝑉𝑑𝑐 ) is sensed
and then compared with the reference value( 𝑉𝑑𝑐𝑟𝑒𝑓 ) .In case of a fuzzy logic control scheme, the error
( 𝑒 = 𝑉𝑑𝑐𝑟𝑒𝑓 − 𝑉𝑑𝑐 ) and integration of error signal 𝑒 are used as inputs for fuzzy processing.
The output of the FLC limits the magnitude of peak reference current 𝐼 𝑚𝑎𝑥 .This current takes care of the active
power demand of the non-linear load and losses in the distribution system.
The schematic diagram of the fuzzy control scheme is shown in fig.2
3. Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 68 | Page
Fig (2) Fuzzy Based Hysteresis Current Controlled (SAPF)
IV. Design Of Ts Fuzzy Control Algorithm
A fuzzy controller consists of stages: fuzzification, knowledge base, interference mechanisms and
defuzzification as shown in fig.3
Fig (3) Fuzzy Logic Controller
1) Fuzzification:
Fuzzy logic uses linguistic variables instead of numerical variables. In a control system, In this case the
inputs are fuzzified with two fuzzy sets P(positive) and N(negative).The process of fuzzification converts
numerical variable (real number) to a linguistic variable (fuzzy number).
For the positive set, the membership function for input Y1&Y2 is respectively given by:
𝜇Ρ 𝑦𝑖 =
0 𝑦𝑖 < −𝐿
𝑦𝑖 + 𝐿
2𝐿
− 𝐿 ≤ 𝑦𝑖 ≤ 𝐿
1 𝑦𝑖 > 𝐿
(6)
On the other hand, the membership function of the negative set for input Y1&Y2is respectively given by:
𝜇N 𝑦𝑖 =
1 𝑦𝑖 < −𝐿
−𝑦𝑖 + 𝐿
2𝐿
− 𝐿 ≤ 𝑦𝑖 ≤ 𝐿
0 𝑦𝑖 > 𝐿
(7)
Where 𝑦𝑖 = [𝑦1, 𝑦2]
Y1 (k) =e (k) =Vdcref -Vdc , Y2 (k) =∑e (k)
Fig.4 (a, b) shows the membership function for positive and negative sets for input y1 &y2 respectively
(a) (B)
Fig (4) Membership function for Y1 and Y2 respectively
2) Design of control rules:
TS fuzzy controller uses the four simplified rule as:
R1: If y1 (k) is P and y2 (k) is P then u1 (k) =a1.y1 (k) +a2 .y2 (k)
R2: If y1 (k) is P and y2 (k) is N then u2 (k) =u1 (k)
4. Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 69 | Page
R3: If y1 (k) is N and y2 (k) is P then u3 (k) =K3u1 (k)
R4: If y1 (k) is N and y2 (k) is N then u4 (k) =K4u1 (k)
Where u1, u2, u3, u4 represent the consequent of the TS fuzzy controller.
3) Defuzzification:
Using Zadeh’s rule for AND operation and the general defuzzifier, the output of the TS fuzzy
controller is:
𝑈 𝑘 =
(𝜇 𝐽 ) 𝛾 𝑈 𝑗 (𝐾)
4
𝐽 =1
(𝜇 𝑗 ) 𝛾
4
𝐽 =1
( 8)
However, for ɣ=1, we get the centroid defuzzifier with u (k) given by:
𝑈 𝑘 = 𝑎 𝑦1 𝐾 + 𝑏 𝑦2 𝐾 (9)
Where a =a1K& b=a2K
And 𝑘 =
𝜇1+𝑘2 𝜇2+𝑘3 𝜇3+𝑘4 𝜇4
(𝜇1+ 𝜇2+𝜇3+𝜇4)
(10)
As K is the operating condition dependent on the effective value of control gain varies widely during
the control process.
V. Adaptive Hysteresis Current Control (AHCC)
Hysteresis current control with variable band can be implemented to generate the switching pattern for APF.
AHCC is the method that builds variable hysteresis bandwidth which is calculated instantaneously, hence the
switching speed becomes smooth and the frequency switching will be fixed considerably.
The adaptive Hysteresis Band(HB) should be derived instantaneously using eq (11) during each sample time to
keep the Switching frequency constant
𝐻𝐵 =
0.125 𝑉𝑑𝑐
𝐹𝑐 𝐿
1 −
4𝐿2
𝑉𝑑𝑐
2
𝑉𝑠
𝐿
+
𝑑𝑖 𝑐
∗
𝑑𝑡
2
(11)
Fig (5)adaptive hysteresis current controller
VI. Simulation And Results
To examine the performance of the proposed APF, 3phase, 3wire system is considered. The parameters
used for the simulation are:
5. Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 70 | Page
System parameters Values
Source voltage (𝑉𝑠) 220V (rms)
System frequency (f) 50 HZ
Source impedance (𝑅𝑠; 𝐿 𝑠) 0.5 mΩ ; 15 𝜇𝐻
Filter impedance (𝑅𝑐; 𝐿 𝑐) 1.5 mΩ ; 1200 𝜇𝐻
Load impedance (𝑅𝑙; 𝐿𝑙) 1.2 mΩ ; 50 𝜇𝐻
Reference Dc Link Voltage (𝑉𝑑𝑐𝑟𝑒𝑓 ) 700 V
Fig (6)AC source voltage (for phase a)
Fig (7)Distorted source current (for phase a)
a) Under action of APF &PI controller:
Fig (8) Compensating current (for phase a)
Fig (9) DC bus Voltage
6. Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 71 | Page
The line current and its spectrum after compensation using active power filter with PI controller are
represented in Figure (10) and figure (11)
Fig (10) Source current after compensation (for phase a)
Fig (11)Harmonic Spectrum of Source Currents
B) Under action of APF & TS-fuzzy controller
Fig (12)Compensating current ic(for phase a)
Fig (13) DC bus Voltage
7. Adaptive –Fuzzy Logic Power Filter for Nonlinear Systems
DOI: 10.9790/1676-1102016673 www.iosrjournals.org 72 | Page
The line current and its spectrum after compensation using active power filter with TS fuzzy controller
are represented in Figure (14) and figure (15)
Fig (14) Source current after compensation
Fig (15) Harmonic Spectrum of Source Currents
VII. Conclusion
In this paper, A TS fuzzy controller is applied to balanced three phase system. by comparing the
performance of TS&PI controllers. By visualizing all Figures of current source, we can conclude a successful
operation of harmonics compensation using the proposed shunt active power filter based on TS Fuzzy
controller. it is noticed the TS Fuzzy Logic controller shows some dynamic performance over Conventional PI
controller, and The performances of the proposed shunt active filter based on Fuzzy current controller in terms
of harmonics elimination is better than PI controller, in addition, fast dc link voltage response over conventional
PI controller,
The total harmonic distortion (THD) values of the supply current with the proposed controllers well below 5%
[13] that respect IEEE standard Norms (THD ≤5%).
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