The designed three phase SAPF based on instantaneous p-q theory was simulated in MATLAB /SIMULINK by using different load conditions i.e. R-L load, suddenly connected R-L load, and additional unbalance R load. Its application was successfully proved and the validity achieved by minimizing the harmonics and improving PF as summarized in Table 2. Consequently, the supply current is almost pure sinusoidal. THD observed was fund to be within the prescribed limits of 5% as recommended by IEEE-519 standard.
Power System Harmonic Compensation Using Shunt Active Power FilterIJERA Editor
This paper shows the method of improving the power quality using shunt active power filter. The proposedtopic comprises of PI controller, filter hysteresis current control loop, dc link capacitor. The switching signal generation for filter is fromhysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. Thispaper represents the simulation and analysis of the using three phase three wire system active filter to compensate harmonics .Theproposed shunt active filter model uses balanced non-linear load. This paper successfully lowers the THD within IEEE norms and satisfactorily works to compensatecurrent harmonics.
Design of shunt active power filter to mitigate harmonicsager alswed
The designed three phase SAPF based on instantaneous p-q theory was simulated in MATLAB /SIMULINK by using different load conditions i.e. R-L load, suddenly connected R-L load, and additional unbalance R load. Its application was successfully proved and the validity achieved by minimizing the harmonics and improving PF as summarized in Table 2. Consequently, the supply current is almost pure sinusoidal. THD observed was fund to be within the prescribed limits of 5% as recommended by IEEE-519 standard.
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.
report of Improvement of the Electric Power Quality Using Series Active and S...Vikram Rawani
The increase of nonlinear loads due to the proliferation of electronic equipment causes power quality in the power system to deteriorate. Harmonic current drawn from a supply by the nonlinear load results in the distortion of the supply voltage waveform at the point of common coupling (PCC) due to the source impedance. Both distorted current and voltage may cause end-user equipment to malfunction, conductors to overheat and may reduce the efficiency and life expectancy of the equipment connected at the PCC.
Performance enhancement of shunt active power filter with fuzzy and hysteresi...Asoka Technologies
This paper proposes fuzzy and hysteresis controllers based three phase Shunt Active Power Filter
for current harmonic compensation to improve the performance of 3ɸ supply system feeding
non- linear loads. The Shunt Active Power Filter is used to eliminate current harmonics. The dc
link control strategy is based on the fuzzy logic controller. Gating pulses for the Shunt Active
Filter is generated using Hysteresis current controller based Pulse width modulation technique.
The proposed model is simulated in MATLAB/SIMULINK. Simulation results show that the
dynamic behavior is better than the conventional Proportional- Integral (PI) controller and is
found to be more robust for changes in load.
Power System Harmonic Compensation Using Shunt Active Power FilterIJERA Editor
This paper shows the method of improving the power quality using shunt active power filter. The proposedtopic comprises of PI controller, filter hysteresis current control loop, dc link capacitor. The switching signal generation for filter is fromhysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. Thispaper represents the simulation and analysis of the using three phase three wire system active filter to compensate harmonics .Theproposed shunt active filter model uses balanced non-linear load. This paper successfully lowers the THD within IEEE norms and satisfactorily works to compensatecurrent harmonics.
Design of shunt active power filter to mitigate harmonicsager alswed
The designed three phase SAPF based on instantaneous p-q theory was simulated in MATLAB /SIMULINK by using different load conditions i.e. R-L load, suddenly connected R-L load, and additional unbalance R load. Its application was successfully proved and the validity achieved by minimizing the harmonics and improving PF as summarized in Table 2. Consequently, the supply current is almost pure sinusoidal. THD observed was fund to be within the prescribed limits of 5% as recommended by IEEE-519 standard.
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.
report of Improvement of the Electric Power Quality Using Series Active and S...Vikram Rawani
The increase of nonlinear loads due to the proliferation of electronic equipment causes power quality in the power system to deteriorate. Harmonic current drawn from a supply by the nonlinear load results in the distortion of the supply voltage waveform at the point of common coupling (PCC) due to the source impedance. Both distorted current and voltage may cause end-user equipment to malfunction, conductors to overheat and may reduce the efficiency and life expectancy of the equipment connected at the PCC.
Performance enhancement of shunt active power filter with fuzzy and hysteresi...Asoka Technologies
This paper proposes fuzzy and hysteresis controllers based three phase Shunt Active Power Filter
for current harmonic compensation to improve the performance of 3ɸ supply system feeding
non- linear loads. The Shunt Active Power Filter is used to eliminate current harmonics. The dc
link control strategy is based on the fuzzy logic controller. Gating pulses for the Shunt Active
Filter is generated using Hysteresis current controller based Pulse width modulation technique.
The proposed model is simulated in MATLAB/SIMULINK. Simulation results show that the
dynamic behavior is better than the conventional Proportional- Integral (PI) controller and is
found to be more robust for changes in load.
The Shunt Active Power Filter to Compensate Reactive Power and Harmonics with...ijtsrd
In this paper is to study the denomination Power quality and large refers to maintaining a proximal sinusoidal power distribution bus voltage at rated magnitude and frequency. This is mainly affected by the generation of harmonics. Even though electronic and non-linear devices are flexible, economical and energy efficient, they may degrade power quality by creating harmonic currents and consuming excessive reactive power. This paper shows the method of improving the power quality using shunt active power filter with proposed optimized PI. The proposed topic comprises of PI controller, filter hysteresis current control loop, dc link capacitor. The switching signal generation for filter is from hysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. Its source current, compensating current and THD values are studied, then PI control strategy is applied then the differences in THD are compared. The PI feedback compensation design starts with the small signal system' transfer function. Then an optimum constant of PI for a Shunt-APF is proposed and implemented to enhance its response to compensation of harmonics of linear and non-linear loads. The obtained results have demonstrated the ability to compensate the current harmonics effectively under distorted source conditions. The fluctuation in the dc bus voltage of the filter depends on the compensation speed of the outer loop that regulates the dc bus voltage. The proposed shunt active filter model uses balanced linear and non-linear load works successfully lowers the THD within IEEE norms and satisfactorily works to compensate current harmonics. The model is made in MATLAB SIMULINK and successfully reduces the harmonic in the source current. Mr. Amit Kumar Rajan | Dr. E Vijay Kumar"The Shunt Active Power Filter to Compensate Reactive Power and Harmonics with optimized PI controller in a 3 Phase 3 Wire Distribution System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18196.pdf http://www.ijtsrd.com/engineering/electrical-engineering/18196/the-shunt-active-power-filter-to-compensate-reactive-power-and-harmonics-with-optimized-pi-controller-in-a-3-phase-3-wire-distribution-system/mr-amit-kumar-rajan
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
Power Quality Improvement in 3-Φ Power System with Shunt Active filter using ...AI Publications
Research paper focuses on enhancement of the power quality, Harmonic reduction and Reactive power compensation . Power quality problems became the foremost important concern now a days. Active filters with synchronous detection methodologies are vividly employed in distribution system to be sure that the harmonics generated by non-linear loads is reduced and leads to less voltage distortion and leads to lesser power superiority problems. The three physical characteristics that mostly underline the power quality and a power quality issues are Voltage, Current and Frequency. Harmonics is defined as a disturbance demonstrated in current or voltage or frequency waveforms which result in devastation, or failure of final equipment ..This paper examines the control of Shunt Active Power Filter with Synchronous Detection Method . Simulation results using MATLAB SIMULINK demonstrates the application of these methods to the control of Active Power Filter . Moreover, this work shows that how the power quality improvement in 3 phase is done with Synchronous Detection Method .
Performance analysis of three phase shunt hybrid active power filtereSAT Journals
Abstract Active filtering of electric power has now become a mature technology for harmonic and reactive power Compensation in AC networks. The past several years have seen a rapid increase of power electronics-based loads connected to low and medium voltage power distribution systems. These loads draw non-sinusoidal current from the mains, degrading the power quality by causing harmonic distortion. This paper proposes a three phase Shunt Hybrid Active Filter (SHAF) topology for harmonic reduction and power factor improvement in low voltage power distribution systems. The compensation current reference for the proposed SHAF topology is obtained by using synchronous reference frame theorem. This theorem simplifies the equations for the current reference estimation in d-q co-ordinates thus leading to a more efficient and fast computation. To generate the compensation current that follows the current reference, the hysteresis current control method is adopted for 2-level VSI in low voltage system, the system is verified by developing simulation model using MATLAB/Simulink simulation package and the results are presented. The performance of shunt active filter and the proposed shunt hybrid active filter topology in reducing total harmonic distortion (THD) is compared for low voltage distribution system. Keywords: SAPF, SHPF, PI control, THD, Hysteresis current pulse width modulation, D-Q reference frame theory.
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.
A study of hysteresis band current control scheme for shunt active power filt...Asoka Technologies
This paper gives an analysis of harmonic currents in power electronics equipment produced by nonlinear loads.. Shunt active power filters (APF) play a key role to reduce harmonics current generated by nonlinear loads. Impact of shunt active power filter (APF) for compensating the harmonics current has been examined and analyzed by using Hysteresis current control technique. In this paper, harmonic control strategy is applied to compensate the current harmonics in the system. A comparative study between PI, HCC, adaptive HCC for the harmonic current mitigation has been used using shunt active filter technique. Simulated results are analyzed using MATLAB
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
Distribution Static Synchronous Compensator (DSTATCOM) is a shunt compensating device which is used
to improve current profile by exchanging of reactive power with unbalanced and nonlinear load. DSTATCOM is a
shunt compensating device used for power quality improvement in distribution systems. Relevant solutions are
applied for harmonics, fluctuation of voltage, voltage deviation, unbalance of three phase voltage and current and
frequency deviation. Different controlling schemes such as Phase Control Method (PCM), Fryze Power Theory
(FPT), Synchronous Reference Frame Theory (SRFT) and Instantaneous Reactive Power Theory (IRPT) are used
for reactive power compensation with the help of Voltage source Inverter (VSI). In this project we are going to
balance the source current using different control schemes. The results of different source currents are compared
with a different control schemes in terms of active and reactive power and in terms of Total Harmonic Distortion
(THD) for nonlinear load using Fryze Power Theory (FPT) and Instantaneous Reactive Power Theory (IRPT).
Reference currents are generated by the different control schemes have been dynamically traced in a hysteresis
current controller. The performance of DSTATCOM for different control schemes is validated for load balancing
and harmonic elimination by using simulation models in MATLAB/SIMULINK
Adaptive Modified Minimally Switched Hysteresis Controlled Shunt Active Power...idescitation
The main focus of this article is to investigate the
effects of Adaptive control on the switching frequency and
Total Harmonic Distortion of a modified, minimally switched
hysteresis controlled shunt active power filter. Reference
current generation was done using Instantaneous real and
reactive power algorithm. Pulses to the minimally switched
grid interactive inverter in which only two switches are
controlled at a time, had been generated using a modified
hysteresis current controller. Use of Modified Hysteresis
controller results in reducing the switching loses to one-third
but results in increase in current THD than the conventional
hysteresis controller. To overcome this, pulses to the modified
hysteresis controller were generated employing adaptive
control by modifying pulses from a conventional hysteresis
controller. Using adaptive control instantaneous switching
frequency was reduced and maintained nearly constant and
THD was brought to the limits specified by the standards,
thus overcoming the disadvantage of conventional and modified
hysteresis controller which has variable switching frequency.
A comparison of Modified Hysteresis controller with and
without Adaptive control has been made, to show the reduction
in THD. The system was simulated using MATLAB-
SIMULINK.
Power system harmonics are a menace to electric power system with disastrous consequence. Due to the presence of non linear load, power quality of the system gets affected. To overcome this, shunt active power filter have been used near harmonic producing loads or at the point of common coupling to block current harmonics. The shunt active power filter is designed to minimize harmonics in source current and reactive power in the non linear power supplies which are creating harmonics. In this paper, Instantaneous power of p-q theory is employed to generate the reference currents and PI controller is used to control the dc link voltage. In addition to this, Artificial Intelligence (AI) technique is used to minimize the harmonics produced by nonlinear load. The main objective of this paper is to analyze and compare THD of the source current with PI controller and by artificial neural network based back propagation algorithm. The proposed system is designed with MATLAB/SIMULINK environment.
Harmonics created by nonlinear loads such as arc furnaces, cycloconverters and motor drives destroys the power quality in the system. They not only affect the working of adjacent loads but also shorten the life of power equipment by creating excessive losses. ‘Shunt Active Power Filter’ is a modern addition to family of compensating devices. It has superior qualities over its contemporaries namely SVCs and STATCOMs. It not only mitigates harmonics within the allowable limits defined by IEEE Std 519-1992, but also compensates unbalancing and reactive power in the system. Consequently, only active power is supplied by the source thus power factor approaches unity. A fully functional Simulink model of Shunt Active Power Filter has been designed based on ‘Instantaneous Power Theory’ or ‘p-q Theory’. The results of simulation comply with all the features described by the theory, justifying employment of SAPF in the industry.
The Shunt Active Power Filter to Compensate Reactive Power and Harmonics with...ijtsrd
In this paper is to study the denomination Power quality and large refers to maintaining a proximal sinusoidal power distribution bus voltage at rated magnitude and frequency. This is mainly affected by the generation of harmonics. Even though electronic and non-linear devices are flexible, economical and energy efficient, they may degrade power quality by creating harmonic currents and consuming excessive reactive power. This paper shows the method of improving the power quality using shunt active power filter with proposed optimized PI. The proposed topic comprises of PI controller, filter hysteresis current control loop, dc link capacitor. The switching signal generation for filter is from hysteresis current controller techniques. With the all these element shunt active power filter reduce the total harmonic distortion. Its source current, compensating current and THD values are studied, then PI control strategy is applied then the differences in THD are compared. The PI feedback compensation design starts with the small signal system' transfer function. Then an optimum constant of PI for a Shunt-APF is proposed and implemented to enhance its response to compensation of harmonics of linear and non-linear loads. The obtained results have demonstrated the ability to compensate the current harmonics effectively under distorted source conditions. The fluctuation in the dc bus voltage of the filter depends on the compensation speed of the outer loop that regulates the dc bus voltage. The proposed shunt active filter model uses balanced linear and non-linear load works successfully lowers the THD within IEEE norms and satisfactorily works to compensate current harmonics. The model is made in MATLAB SIMULINK and successfully reduces the harmonic in the source current. Mr. Amit Kumar Rajan | Dr. E Vijay Kumar"The Shunt Active Power Filter to Compensate Reactive Power and Harmonics with optimized PI controller in a 3 Phase 3 Wire Distribution System" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-5 , August 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18196.pdf http://www.ijtsrd.com/engineering/electrical-engineering/18196/the-shunt-active-power-filter-to-compensate-reactive-power-and-harmonics-with-optimized-pi-controller-in-a-3-phase-3-wire-distribution-system/mr-amit-kumar-rajan
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
Power Quality Improvement in 3-Φ Power System with Shunt Active filter using ...AI Publications
Research paper focuses on enhancement of the power quality, Harmonic reduction and Reactive power compensation . Power quality problems became the foremost important concern now a days. Active filters with synchronous detection methodologies are vividly employed in distribution system to be sure that the harmonics generated by non-linear loads is reduced and leads to less voltage distortion and leads to lesser power superiority problems. The three physical characteristics that mostly underline the power quality and a power quality issues are Voltage, Current and Frequency. Harmonics is defined as a disturbance demonstrated in current or voltage or frequency waveforms which result in devastation, or failure of final equipment ..This paper examines the control of Shunt Active Power Filter with Synchronous Detection Method . Simulation results using MATLAB SIMULINK demonstrates the application of these methods to the control of Active Power Filter . Moreover, this work shows that how the power quality improvement in 3 phase is done with Synchronous Detection Method .
Performance analysis of three phase shunt hybrid active power filtereSAT Journals
Abstract Active filtering of electric power has now become a mature technology for harmonic and reactive power Compensation in AC networks. The past several years have seen a rapid increase of power electronics-based loads connected to low and medium voltage power distribution systems. These loads draw non-sinusoidal current from the mains, degrading the power quality by causing harmonic distortion. This paper proposes a three phase Shunt Hybrid Active Filter (SHAF) topology for harmonic reduction and power factor improvement in low voltage power distribution systems. The compensation current reference for the proposed SHAF topology is obtained by using synchronous reference frame theorem. This theorem simplifies the equations for the current reference estimation in d-q co-ordinates thus leading to a more efficient and fast computation. To generate the compensation current that follows the current reference, the hysteresis current control method is adopted for 2-level VSI in low voltage system, the system is verified by developing simulation model using MATLAB/Simulink simulation package and the results are presented. The performance of shunt active filter and the proposed shunt hybrid active filter topology in reducing total harmonic distortion (THD) is compared for low voltage distribution system. Keywords: SAPF, SHPF, PI control, THD, Hysteresis current pulse width modulation, D-Q reference frame theory.
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.
A study of hysteresis band current control scheme for shunt active power filt...Asoka Technologies
This paper gives an analysis of harmonic currents in power electronics equipment produced by nonlinear loads.. Shunt active power filters (APF) play a key role to reduce harmonics current generated by nonlinear loads. Impact of shunt active power filter (APF) for compensating the harmonics current has been examined and analyzed by using Hysteresis current control technique. In this paper, harmonic control strategy is applied to compensate the current harmonics in the system. A comparative study between PI, HCC, adaptive HCC for the harmonic current mitigation has been used using shunt active filter technique. Simulated results are analyzed using MATLAB
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
Distribution Static Synchronous Compensator (DSTATCOM) is a shunt compensating device which is used
to improve current profile by exchanging of reactive power with unbalanced and nonlinear load. DSTATCOM is a
shunt compensating device used for power quality improvement in distribution systems. Relevant solutions are
applied for harmonics, fluctuation of voltage, voltage deviation, unbalance of three phase voltage and current and
frequency deviation. Different controlling schemes such as Phase Control Method (PCM), Fryze Power Theory
(FPT), Synchronous Reference Frame Theory (SRFT) and Instantaneous Reactive Power Theory (IRPT) are used
for reactive power compensation with the help of Voltage source Inverter (VSI). In this project we are going to
balance the source current using different control schemes. The results of different source currents are compared
with a different control schemes in terms of active and reactive power and in terms of Total Harmonic Distortion
(THD) for nonlinear load using Fryze Power Theory (FPT) and Instantaneous Reactive Power Theory (IRPT).
Reference currents are generated by the different control schemes have been dynamically traced in a hysteresis
current controller. The performance of DSTATCOM for different control schemes is validated for load balancing
and harmonic elimination by using simulation models in MATLAB/SIMULINK
Adaptive Modified Minimally Switched Hysteresis Controlled Shunt Active Power...idescitation
The main focus of this article is to investigate the
effects of Adaptive control on the switching frequency and
Total Harmonic Distortion of a modified, minimally switched
hysteresis controlled shunt active power filter. Reference
current generation was done using Instantaneous real and
reactive power algorithm. Pulses to the minimally switched
grid interactive inverter in which only two switches are
controlled at a time, had been generated using a modified
hysteresis current controller. Use of Modified Hysteresis
controller results in reducing the switching loses to one-third
but results in increase in current THD than the conventional
hysteresis controller. To overcome this, pulses to the modified
hysteresis controller were generated employing adaptive
control by modifying pulses from a conventional hysteresis
controller. Using adaptive control instantaneous switching
frequency was reduced and maintained nearly constant and
THD was brought to the limits specified by the standards,
thus overcoming the disadvantage of conventional and modified
hysteresis controller which has variable switching frequency.
A comparison of Modified Hysteresis controller with and
without Adaptive control has been made, to show the reduction
in THD. The system was simulated using MATLAB-
SIMULINK.
Power system harmonics are a menace to electric power system with disastrous consequence. Due to the presence of non linear load, power quality of the system gets affected. To overcome this, shunt active power filter have been used near harmonic producing loads or at the point of common coupling to block current harmonics. The shunt active power filter is designed to minimize harmonics in source current and reactive power in the non linear power supplies which are creating harmonics. In this paper, Instantaneous power of p-q theory is employed to generate the reference currents and PI controller is used to control the dc link voltage. In addition to this, Artificial Intelligence (AI) technique is used to minimize the harmonics produced by nonlinear load. The main objective of this paper is to analyze and compare THD of the source current with PI controller and by artificial neural network based back propagation algorithm. The proposed system is designed with MATLAB/SIMULINK environment.
Harmonics created by nonlinear loads such as arc furnaces, cycloconverters and motor drives destroys the power quality in the system. They not only affect the working of adjacent loads but also shorten the life of power equipment by creating excessive losses. ‘Shunt Active Power Filter’ is a modern addition to family of compensating devices. It has superior qualities over its contemporaries namely SVCs and STATCOMs. It not only mitigates harmonics within the allowable limits defined by IEEE Std 519-1992, but also compensates unbalancing and reactive power in the system. Consequently, only active power is supplied by the source thus power factor approaches unity. A fully functional Simulink model of Shunt Active Power Filter has been designed based on ‘Instantaneous Power Theory’ or ‘p-q Theory’. The results of simulation comply with all the features described by the theory, justifying employment of SAPF in the industry.
CHB VSI Based Shunt Active Power Filter for PV Connected DSTATCOM in Three Ph...ijsrd.com
This paper presents a compensating system for the harmonic currents, the reactive power and source neutral conductor current in three-phase four-wire distribution system by using a five-level cascaded H-bridge voltage source inverter (CHB-VSI) based shunt active power filter (SAPF). A controller based on the d-q-0 theory (synchronous reference frame) and in-phase disposition (IPD) modulation technique is introduced for the SAPF. The distribution network which supplies mixed non-linear loads and employing CHB-VSI based SAPF is simulated by MATLAB/SIMULINK software. The performance of SAPF is analyzed by using the proposed control technique on the total harmonic distortion of source current, power factor and reactive power. Besides, it is illustrated by extensive simulation results, the effectiveness of five-level SAPF on source neutral conductor current.
This is the 2012 vision for NICCE, the nation\'s leading modeling and simulation organization focused on clean energy and environmental technology commercialization.
Prospective economics of standalone electrofuelsIlkka Hannula
This presentation examines the economics of producing synthetic fuels from carbon dioxide (CO2) and water with renewable electricity based on current Finnish and German electricity price data.
Le Service Public de Wallonie publie une nouvelle brochure sur le développement éolien en Wallonie.
Les citoyens pourront y trouver des informations scientifiques et rigoureuses sur les éoliennes: efficacité, production, éolien participatif, bénéfice pour les citoyens, santé, environnement et sécurité.
Cette brochure est réalisée par l'APERe.
L'INVESTISSEMENT DES CITOYENS ET DES COLLECTIVITES DANS LES GRANDS PROJETS ENERGETIQUES
La réappropriation démocratique des moyens de production, de distribution et de gestion d’énergie par les collectivités locales et les citoyens est un enjeu fondamental. Les projets énergétiques publics ou citoyens émergent de la mobilisation de citoyens, d’associations ou d’élus locaux, tous concernés par la politique énergétique des territoires. Ils doivent s’appuyer sur les critères suivants : ancrage local, finalité non spéculative, «bonne gouvernance» et respect de l’environnement.
Animé par Yannick Régnier, chargé de mission Territoires au CLER, Réseau pour la transition énergétique
Intervenants :
> Projet éolien participatif "Les Landes du Mené"
Gilles Aignel et Gilles Rault, gérants de la CIMES1, structure d’investissement local du Mené
> Le parc éolien citoyen de Béganne
Pierre Jourdain, chargé de développement de projets éoliens citoyens, Éoliennes en Pays de Vilaine
> Du local à Energie Partagée... et réciproquement
Christelle Sauvage, présidente d'Enercoop Ardennes-Champagne et de l'association Énergie Partagée
> Une société d'investissement dédiée au développement des énergies renouvelables en Région Bretagne
Dominique Ramard, vice-Président chargé de l'énergie de la région Bretagne
> Une régie de production d'énergies renouvelables portée par le syndicat d'énergies
Patrick Villalon, chef du Service Énergie - Environnement du SyDEV (syndicat départemental d’énergie de la Vendée)
Cet atelier s'est déroulé le jeudi 12 juin 2011 dans le Mené, dans le cadre des 1ères rencontres nationales "énergie et territoires ruraux, vers des territoires à énergie positive".
Plus d'informations: www.territoires-energie-positive.fr
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Single Stage Single Phase Active Power Factor Corrected Ĉuk Topology Based AC...IJPEDS-IAES
This paper focuses on the analysis of a power factor correction (PFC) converter using close loop Ĉuk topology. Regardless of the input line voltage and output load variations, input current drawn by the buck or buck-boost converter is always discontinuous. The Boost converter suffers from high voltage stresses across the power electronic devices. The input current in Ĉuk converter is comparable to boost converter’s input current. In this paper output voltage is controlled by inner current and outer voltage control loop along with power factor correction (PFC). It shows less input current THD, nearly unity power factor and better output voltage regulation of AC-DC converter under variable input voltage and output load. In this paper the relative performance between normal diode rectifier, open loop Ĉuk rectifier and close loop Ĉuk rectifier is presented. An algorithm for implementing close loop Ĉuk rectifier in digital domain is developed and simulated.
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.
Power factor improvement is the essence of any power sector for realible operations. This report provides literature study of a fixed capacitor thyristor controlled reactor type of power factor compensator by matlab simulation and implementation in programmed microcontroller. To retaining power factor closed to unity under various load condition the arduino ATmega8 microcontroller is used which is programmed by keil software. The simulation is done using proteus software which display power factor according to the variation in load whenever a capacitive load is connected to the transmission line, a shunt reactor is connected which injects lagging reactive VARs to the power system. This report also includes the matlab simulation for three phase power factor improvement by using fixed capacitor thyristor controlled reactor. As a
result the power factor is improved. The results given in this report provides
suitable matlab simulation and proteus simulation based reactor power compensation and power factor improvement and techniques using a FCTCR.
Implementation for Controller to Unified Single Phase Power Flow Using Digita...IJERA Editor
Presenting in his paper, Digital signal processor (DSP)-based implementation of a single phase unified power flow controller (UPFC). For shunt side and series side An efficient UPFC control algorithm is achieved. Discussing the laboratory experimental results using DC source are taken as an UPFC linked by two ll-bridge PWM voltage source converters.
The development of active power filter (APF) using rectifier boost technique has been identified to compensate for the pulsating nature of the distorted supply current waveform of non-linear load. In this work, investigation is carried out on the operation of rectifier without any filters function. This is then extended to operate the rectifier converter with an active power filter function. APF function is implemented by enabling the closed-loop control using standard proportional integral control to rectify the distorted supply current to become continuous, sinusoidal and in-phase with the supply voltage waveform. Consequently, the total harmonic distortion (THD) level was reduced to meet the acceptable limit defined in the standard of IEEE-519 1992. The selected simulation results obtained from MATLAB/Simulink are presented to justify the proposed filter structure.
Harmonic analysis and Power factor improvement with UPQC under two Novel cont...IJERA Editor
This paper presents unified power quality conditioner (UPQC)for power quality improvements in terms of
harmonics compensation and power factor correction in a three-phase four-wire distribution system.The UPQC
is implemented with PWM controlled voltage source converter (VSC) and switching patterns are generated
through Indirect PI and Synchronous Reference Frame controller. The selected topology for voltage source
converter is the three-leg and six-leg VSC for Indirect PI and Synchronous reference frame (SRF) control
strategies respectively. The behavior of UPQC has been analyzed by considering a case study with switching of
three phase half bridge diode rectifier and a parallel star connected unbalanced R-L loads. Harmonic spectrum
of the source current and load voltage are compared in between without UPQC and with UPQC by considering
both control strategies. The complete system has been modeled using MATLAB software with its stimulus’s
sim power system toolboxes.
This paper presents study of distribution static compensator (D-STATCOM) for compensation of reactive power, harmonic distortion mitigation and load balancing in three phase three wire nonlinear load distribution system. The proposed control algorithm is developed based on synchronous reference frame theory using PI and FUZZY logic controller. The obtained reference current signal from control algorithm is compared in hysteresis band current controller for better switching of D-STATCOM. The performance of DSTATCOM with PI and fuzzy logic controller is also analysed and compared for DC voltage regulation and harmonic distortion mitigation .The proposed method is provided effective compensation for reactive power, harmonic distortion mitigation and load voltage balancing. The simulation results are obtained using MATLAB/SIMULINK soft ware.
This paper presents a grid-connected photovoltaic system (PV) used as a shunt active power filter (SAPF) to provide the power factor correction, harmonic elimination, reactive power compensation and to simultaneously supply power from a PV system to the utility. A direct power control (DPC) method is used for controlling the system to feed the photovoltaic energy in synchronization with grid and provide power quality improvement. The PI parameters of DC-link voltage controller are tuned using the Particle Swarm Optimization (PSO) algorithm without the need for an exact mathematical model of system. This PI-PSO controller gives better results for robustness, harmonic minimization and reduces the overshoot and undershoots of PI controller. The overall control of system is tested in Matlab/Simulink environment. Then, the simulations results demonstrate the robustness and feasibility of proposed method.
Implementation of Fan6982 Single Phase Apfc with Analog ControllerIJRESJOURNAL
ABSTRACT：Active power factor orrection technique can improve the input power factor and reduce the harmonic component of the input current. In small power applications, the single-phase active power factor correction circuit of high frequency switching (APFC), reduction of the boost inductance decreases the boost inductor and filter capacitor volume, reducing the net side current ripple, improve efficiency. On the basis of describing the principle of single-phase single-stage boost APFC double closed loop control, a new duty cycle compensation method is proposed, which is based on the FAN6982 simulation and the single phase APFC of the rated output power 500W is achieved. The results show that the effect of current ripple rejection is obvious, and the input current is consistent with the input voltage phase.
Source current harmonic mitigation of distorted voltage source by using shunt...IJECEIAES
In this paper, three-phase, four-wire shunt active power filter (SAPF) is utilized to mitigate system harmonics of distorted voltage source for unbalanced and nonlinear loads. Basically, the source voltage should be pure sinusoidal waveform to get a good mitigation of source current harmonics. In this under study system, the source voltage is assumed to be harmonic distortion non-sinusoidal voltage source. The phase locked loop (PLL) control circuit is wielded for extracting the fundamental component of the distorted source voltage to use it as an input signal to the SAPF control. Another input signal to the SAPF is the distorted load current. The SAPF control system uses (p-q) theory to calculate the optimum instantaneous current to be injected by the SAPF to mitigate the source current harmonics even the source voltage is harmonic distorted. MATLAB/SIMULINK software package is utilized to simulate the system under study. The effect of SAPF is tested when it’s used with and without the PLL control circuit. The simulation results show that, the THD of source current when using the PLL control circuit is improved to comply with the harmonic limits given in the IEEE 519-1992 and IEC 61000-4-7 standards.
Harmonic Analysis of Output Voltage of Single phase AC Voltage ControllersEditor IJMTER
The harmonic analysis of output voltage of single phase AC voltage controller was well
known. But, it has been found that less harmonic analysis and comparison between voltage dimmer
and thyristorised AC voltage controller. This paper presents such an analysis on the AC voltage
controller using TRIAC, thyristor and voltage dimmer circuit. Results are obtained from simulations
as well as hardware implementation and results were compared.
Three Phase Twelve Pulse Controlled Rectifier with Reduced Output Current Har...paperpublications3
Abstract: The power conversion from AC to DC and vice versa is basic need for several industrial applications, single phase or three phase controlled or uncontrolled convertor is used for this purpose. In these types of convertors large lower order harmonics are present. A twelve pulse three phase rectifier is used for reducing harmonics in high power applications, but the (12m±1) order harmonics are still present in the system. For further reduction of harmonics this paper proposes a PI controller based synchronous twelve pulse generator used for gate triggering of controlled twelve pulse rectifier with DC motor as a load.
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presentation of Conference On Electrical And Electronic Engineering 2015
1. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
DESIGN A SHUNTACTIVE POWER FILTER
TO MITIGATE THE HARMONICS CAUSED
BY NONLINEAR LOADS
Dr. DUR MUHAMMAD SOOMRO
SAGER K ALSWED
MOHAMED ASGHAIYER MOHAMED
2. Power quality (PQ) issues .
Effect of harmonics .
Solve PQ issues .
1. Passive power filter (PPF).
2. Active power filter (APF) .
Types of APF
This paper is focusing on the application of SAPF in treating the
harmonics distortion in the distribution system by determining low
Total Harmonic Distortion (THD) value and improving power factor
Power quality (PQ) issues .
Effect of harmonics .
Solve PQ issues .
1. Passive power filter (PPF).
2. Active power filter (APF) .
Types of APF
This paper is focusing on the application of SAPF in treating the
harmonics distortion in the distribution system by determining low
Total Harmonic Distortion (THD) value and improving power factor
INTRODUCTION
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
3. Principle of SAPFPrinciple of SAPF
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
4. METHODOLOGY
Design SAPF based on instantaneous PQ theoryDesign SAPF based on instantaneous PQ theory
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
5. SIMULATION CIRCUIT
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
6. Blocks for Calculation of
Compensation Current
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
7. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Blocks for Calculation of
Compensation Current
This is the heart of APF. PQ theory algorithm
for calculation of P, Q and compensation
current are implemented as given in Figure
7. Embedded MATLAB function block is used
to implement all the mathematical operations
involved in the algorithm.. . In that Clarke
transform to calculate real, reactive and zero
sequence power and stationary frame at
compensated reference current generate by
using PI controller. The SAPF at using DC link
capacitor and DC link reference voltage and
actual voltage compared to the voltage to be
8. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Hysteresis band current controller
There are two inputs for the hysteresis band
which is the reference current and the new
injection current as shown in below figure.
The load currents are sensed and compared
with respective command current by
hysteresis band. The error between reference
current and the new injection current are fed
to the six relays. This signal will guide the
inverter’s switching to compensate the
harmonic current.
9. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Hysteresis band current controller
10. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
PI controller
The actual DC link voltage is compared with a
reference DC link voltage and passed through
a PI controller. To maintain dc-link voltage at
a fixed reference value, the dc-link capacitor
requires a certain amount of real power,
which is directly proportional to the difference
between the reference and actual voltages.
The control signal coming from PI controller
to regulate DC link voltage can be expressed
as:
P(dc-link)= Kp (V (dc-ref) -Vdc )+Ki ∫ (V (dc-
11. PI controller
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
12. CIRCUIT PARAMETERS
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
13. RESULTS AND DISCUSSION
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Case 1
The simulation results of voltage, current
and THD are obtained with MATLAB tool to
analyze the performance of SAPF without and
with compensation as shown in Figures .THD
is 28.95 and power factor 0.78
SourcecurrentwithoutSAPF
SourcevoltagewithoutandwithSAPF
14. RESULTS AND DISCUSSION
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
After add shunt active power filter ,THD is
1.77 and power factor 0.9993
15. RESULTS AND DISCUSSION
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Case 2 (Additional R load with R-L
load)
Before SAPF
THD was 27.65%. PF was 0.778
16. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
RESULTS AND DISCUSSION
Case 2 (Additional R load with R-L
load)
After SAPF
The SAPF was connected to the harmonic distorted
system at time t = 0.2 sec to mitigate the effect.
On the other hand, additional connected R-L load
was connected at 0.3 sec. It can be seen that the
filter takes only 0.021 sec for the shunt APF to
follow the change of the load current as shown in
Figures. THD is 1.82%, PF is 0.9987
17. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
RESULTS AND DISCUSSION
Case 3 (Unbalanced R load with R-L
load)
In this case SAPF was investigated with R-L load
with additional unbalanced R load
THD was 34.90%. While the PF reduced to 0.688
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07
-2
0
2
FFT window: 4 of 50 cycles of selected signal
Time (s)
0 100 200 300 400 500 600 700 800 900 1000
0
5
10
15
20
Frequency (Hz)
Fundamental (50Hz) = 3.286 , THD= 34.90%
Mag(%ofFundamental)
18. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
RESULTS AND DISCUSSION
When the SAPF was connected, it generated
reference current to inject in the system to cancel
the harmonic current as shown in Figure
THD is 1.58 and PF is 0.9982
19. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
RESULTS AND DISCUSSION
20. Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
Conference On Electrical And Electronic Engineering 2015 (IC3E 2015)
CONCLUSIONThe designed three phase SAPF based on
instantaneous p-q theory was simulated in
MATLAB /SIMULINK by using different load
conditions i.e. R-L load, suddenly connected
R-L load, and additional unbalance R load.
Its application was successfully proved and
the validity achieved by minimizing the
harmonics and improving PF as summarized
in Table 2. Consequently, the supply current
is almost pure sinusoidal. THD observed
was fund to be within the prescribed limits
of 5% as recommended by IEEE-519
