A Simple Control Scheme for Single-Phase Shunt Active Power Filter with Fuzzy Logic Based DC Bus Voltage Controller
01 Jan 2009-
TL;DR: In this article, a simple control scheme of single-phase shunt active power filter for current harmonics and reactive power compensation of linear and non-linear loads, is proposed, which is based on uncomplicated reference source current generation and fuzzy logic based dc bus voltage regulation methods.
Abstract: In this paper, a simple control scheme of single-phase shunt active power filter for current harmonics and reactive power compensation of linear and non-linear loads, is proposed. Simplicity of the proposed control scheme is based on uncomplicated reference source current generation and fuzzy logic based dc bus voltage regulation methods. Thus, complex computations are not needed. To indicate reactive power and current harmonics compensation capability in both transient and steady state, leading and lagging power factor linear loads and uncontrolled rectifier and thyristor based ac regulator non-linear loads are connected to the system. The effectiveness of the proposed control technique is verified by the simulation results.
Citations
More filters
20 Mar 2009
163 citations
TL;DR: In this article, a two-loop cascade control strategy is developed that includes an inner-loop designed, using the Lyapunov design approach, to cope with the compensation issue and an outerloop designed to regulate the capacitor voltage.
Abstract: The problem of controlling single-phase shunt active power filters is addressed in presence of nonlinear loads. The control objective is twofold: (i) compensation of harmonic and reactive currents absorbed by the nonlinear load, this objective is referred to as power factor correction (PFC); (ii) regulation of the inverter output capacitor voltage. A two-loop cascade control strategy is developed that includes an inner-loop designed, using the Lyapunov design approach, to cope with the compensation issue and an outer-loop designed to regulate the capacitor voltage. The controller performances are formally analysed using system averaging theory. The theoretical results are illustrated by simulation.
40 citations
Cites background from "A Simple Control Scheme for Single-..."
...In Doğan and Akkaya (2009), a fuzzy control design is considered and the control performances are illustrated by simulation....
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TL;DR: In this paper, an adaptive hysteresis current controller that changes its bandwidth according to the active power demand of the load was proposed to compensate the current harmonics and reactive power at common coupling of the AC mains.
Abstract: In recent years, active power filters (APFs) have become popular because of their excellent current harmonics and reactive power mitigation ability. The performance of the APF is directly related to the selected control strategy, which is mainly divided into 2, the reference current generation and current control. Most of the reference current generation methods are very complicated and require precise mathematical expressions. Moreover, being the most preferred current control method, conventional hysteresis controllers have a fixed bandwidth, which causes different total demand distortion values under different load conditions. In this study, a novel control scheme for a single-phase shunt APF is proposed. The proposed scheme uses an uncomplicated modification of the sine multiplication method for extraction of the reference filter current. Moreover, it employs an adaptive hysteresis current controller that changes its bandwidth according to the active power demand of the load. Thus, the requirements of the current harmonics limits specified in IEEE Std. 519-1992 are always fulfilled under different load conditions. A single-phase shunt APF controlled by the proposed scheme is modeled and simulated under nonlinear load conditions using MATLAB/Simulink. The simulation results indicate that the APF effectively compensate the current harmonics and reactive power at the point of common coupling of the AC mains.
13 citations
Cites background from "A Simple Control Scheme for Single-..."
...As a result, the other loads supplied from same point were badly affected, even though they had linear V-I characteristics [1]....
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TL;DR: This paper focuses on an Artificial Neural Network controller based Shunt Active Power Filter (SAPF) for mitigating the harmonics of the distribution system and shows that the novel control method is not only easy to be computed and implemented, but also very successful in reducing harmonics.
Abstract: 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.
11 citations
Cites background from "A Simple Control Scheme for Single-..."
...INTRODUCTION In recent years with the expansion of power semiconductor technology, power electronics based devices such as adjustable-speed drives, arc furnace, switched-mode power supply, uninterruptible power supply etc are employed in various fields [1], [5]-[7]....
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01 Sep 2014
TL;DR: In this article, an Artificial Neural Network (ANN) controller based Shunt Hybrid Active Power Filter (SHAPF) is proposed for compensating the harmonics of the distribution system.
Abstract: This paper focuses on an Artificial Neural Network (ANN) controller based Shunt Hybrid Active Power Filter (SHAPF) for compensating the harmonics of the distribution system. To enhance the performance of the conventional controller (Hysteresis controller) and to take advantage of intelligent controllers, a back propagation algorithm based feed forward-type ANN technique is implemented in shunt active power filter for producing the controlled pulses required for IGBT inverter. The proposed approach mainly work on the principle of energy stored by capacitor 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 complete power system set model of the proposed filter technique has been developed in MATLAB. The control algorithm developed is very simple. Simulations are carried out for the proposed scheme 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.
7 citations
References
More filters
TL;DR: In this paper, a new instantaneous reactive power compensator comprising switching devices is proposed, which requires practically no energy storage components, and is based on the instantaneous value concept for arbitrary voltage and current waveforms.
Abstract: The conventional reactive power in single-phase or three- phase circuits has been defined on the basis of the average value concept for sinusoidal voltage and current waveforms in steady states. The instantaneous reactive power in three-phase circuits is defined on the basis of the instantaneous value concept for arbitrary voltage and current waveforms, including transient states. A new instantaneous reactive power compensator comprising switching devices is proposed which requires practically no energy storage components.
3,331 citations
"A Simple Control Scheme for Single-..." refers methods in this paper
...For this purpose several methods such as pq-theory [5]-[8], dq-transformation [9], multiplication with sine function [10]-[12] and fourier transform [13]-[14] have been introduced in literature....
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05 Dec 2005
TL;DR: This paper deals with general pure active filters for power conditioning, and specific hybridactive filters for harmonic filtering of three-phase diode rectifiers.
Abstract: Unlike traditional passive harmonic filters, modern active harmonic filters have the following multiple functions: harmonic filtering, damping,isolation and termination, reactive-power control for power factor correction and voltage regulation, load balancing, voltage-flicker reduction, and/or their combinations. Significant cost reductions in both power semiconductor devices and signal processing devices have inspired manufactures to put active filters on the market. This paper deals with general pure active filters for power conditioning, and specific hybrid active filters for harmonic filtering of three-phase diode rectifiers.
954 citations
"A Simple Control Scheme for Single-..." refers background in this paper
...However the APFs have still the disadvantages of higher cost and complexity of control [3]....
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01 Sep 2000
TL;DR: There has been considerable interest in the development and applications of active filters because of the increasing concern over power quality, at both distribution and consumer levels, and the need to control reactive power and voltage stability at transmission levels as mentioned in this paper.
Abstract: There has been considerable interest in the development and applications of active filters because of the increasing concern over power quality, at both distribution and consumer levels, and the need to control reactive power and voltage stability at transmission levels. The existing approaches are classified and assessed to provide a framework of references for both researchers in this field and for generators, suppliers and consumers of electrical power who are, or may be, concerned about the problems associated with power quality and are considering installing active filters for their particular sets of problems.
668 citations
"A Simple Control Scheme for Single-..." refers background in this paper
...Main purpose of the filter is to cancel the load current harmonics injected to the supply but it can also implement reactive power compensation and three phase currents balancing [4]....
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01 Jan 1976
469 citations
"A Simple Control Scheme for Single-..." refers background in this paper
...Power system and power electronics engineers made an effort to develop dynamic and adjustable solution to these power quality problems and a concept of active power filter (APF) –also called active power line conditioner (APLC) or active power quality conditioner (APQC)– was introduced first a couple of decade ago by Gyugi and Strycula [2]....
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01 Jan 1996
TL;DR: In this article, an active power filter (APF) is proposed to control the voltage of an energy-storage capacitor, which employs a new control method, using an integration and sampling technique, to simplify the calculation algorithm for load current.
Abstract: The paper presents an active power filter (APF) circuit which employs a new control method, using an integration and sampling technique, to simplify the calculation algorithm for the real fundamental component of load current. In addition, a new simple control scheme, based on the energy balance concept, is proposed to control the voltage of an energy-storage capacitor. Since the energy change in the energy-storage capacitor can be compensated in the next cycle, and a larger DC bus voltage ripple can be tolerated if a sampling technique is used, a relatively smaller energy storage capacitor is required. The advantages of this APF circuit are simplicity of control circuits, low cost (a smaller energy-storage capacitor) and good transient response. In theory, the time delay for the compensation of reactive power and harmonic currents is zero. The feasibility of this theory is veriffied by using a PSPICE simulation and experimental results.
183 citations
"A Simple Control Scheme for Single-..." refers methods in this paper
...For this purpose several methods such as pq-theory [5]-[8], dq-transformation [9], multiplication with sine function [10]-[12] and fourier transform [13]-[14] have been introduced in literature....
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