Comparison of single phase shunt active power filter algorithms
05 Jun 2006-pp 601-608
TL;DR: A comparative study of different algorithms for extracting reference compensating current for single-phase shunt active power filter finds different type of approaches, both direct and indirect methods, in detail.
Abstract: A comparative study of different algorithms for extracting reference compensating current for single-phase shunt active power filter is presented. The paper discusses different type of approaches, both direct and indirect methods, in detail. The performance of these algorithms is investigated giving an emphasis to the transient performance of the active power filter.
Citations
More filters
04 Jul 2010
TL;DR: In this article, a single-phase inverter for distributed generation systems requiring power quality features, such as harmonic and reactive power compensation for grid-connected operation, is proposed, where the inverter controls the active power flow from the renewable energy source to the grid and also performs the nonlinear load current harmonic compensation keeping the grid current almost sinusoidal.
Abstract: Power electronic converters are commonly used for interfacing distributed generation systems to the electrical power network. This paper deals with a single-phase inverter for distributed generation systems requiring power quality features, such as harmonic and reactive power compensation for grid-connected operation. The idea is to integrate the DG unit functions with shunt active power filter capabilities. With the proposed approach, the inverter controls the active power flow from the renewable energy source to the grid and also performs the non-linear load current harmonic compensation keeping the grid current almost sinusoidal. The control scheme employs a current reference generator based on Sinusoidal Signal Integrator (SSI) and Instantaneous Reactive Power (IRP) theory together with a repetitive current controller. Experimental results obtained on a 4 kVA inverter prototype demonstrate the feasibility of the proposed solution.
301 citations
Cites background or methods from "Comparison of single phase shunt ac..."
...Phase Locked Loop (EPLL) scheme or a controller such as Proportional-Integral (PI) to find the reference current [5,6]....
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...The integration of APF capability in single-phase inverters needs a particular attention since the control techniques (for example, to find the reference current) were developed for three-phase APFs....
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...The literature presents different solutions to compute the harmonic extraction task for single-phase APFs [5-16]....
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...In [5], the methods are classified in direct and indirect methods....
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TL;DR: In this article, a generalised single-phase p-q theory for active power filtering under the condition of distorted utility voltage is proposed. But the authors focus on the case of single phase loads.
Abstract: The single-phase p-q theory for the purpose of active power filtering in the case of single-phase loads is dealt with here. A simple modification is proposed to develop a generalised single-phase p-q theory that can be utilised under the condition of distorted utility voltage. A systematic study is presented by realising both direct and indirect current control techniques. The simulation as well as the digital signal processor (DSP) (DS1104 of dSPACE) based experimental results are discussed. The developed single-phase shunt active power filter (APF) prototype is tested under different operating conditions with different loads to evaluate the full capabilities of the proposed generalised theory for practical uses. The shunt APF reduces the source current total harmonics distortion (THD) from 27.2 to 3.4% under a distorted supply voltage with a THD of 16.2%.
205 citations
TL;DR: In this paper, a synchronous reference frame (SRF) method was proposed to extract the reference compensating current for single-phase shunt active power filters (APFs).
Abstract: This paper discusses the design of a novel synchronous reference frame (SRF) method that can extract the reference compensating current for single-phase shunt active power filters (APFs). Unlike previous SRF studies, the proposed method has an innovative feature that does not require a fictitious current signal. Other key features of the proposed strategy include frequency-independent operation, accurate reference current extraction, and relatively fast transient response. The effectiveness of the proposed method is investigated by conducting a detailed mathematical analysis. Results of the analysis confirm the superior performance of the suggested approach. Theoretical evaluations are confirmed by the experimental results.
44 citations
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.
22 citations
Cites background from "Comparison of single phase shunt ac..."
...It can also provide a response time of half cycle for load containing odd harmonics only [15]....
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15 Jun 2008
TL;DR: In this article, a new control scheme for a single phase shunt active power filter (APF) is proposed, which can be easily adapted to work in a distributed generation system, injecting active power into the grid.
Abstract: A new control scheme for a single phase shunt Active Power Filter (APF) is proposed in this paper. The goal is the introduction of a new reference generator along with a repetitive current control scheme. The proposed reference generator uses a filter based on a sinusoidal signal integrator and the instantaneous reactive power theory to compute the APF reference current. The proposed scheme can be easily adapted to work in a distributed generation system, injecting active power into the grid. The whole control algorithm has been implemented on the dSPACE DS1103 development system controlling a single phase APF prototype to demonstrate the feasibility of the proposed solution.
16 citations
Cites methods from "Comparison of single phase shunt ac..."
...These methods are classified in direct and indirect methods [9]....
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...The direct methods include Instantaneous Reactive Power (IRP) theory [10]-[17], Synchronous Reference Frame (SRF) theory [18]-[20] and Fourier transform method [9]....
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...On the other hand, the indirect methods include the use of controllers such as ProportionalIntegral (PI) or an Enhanced Phase Locked Loop (EPLL) to find the reference current [5],[9]....
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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
"Comparison of single phase shunt ac..." refers methods in this paper
...c) Method 3- pq Theory Since its inception in 1984 [8] by Akagi et....
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TL;DR: In this paper, a nonlinear adaptive notch filter based on the concept of an enhanced phase-locked loop (PLL) is proposed for online signal analysis for power systems protection, control and power quality enhancement.
Abstract: This paper presents various applications of a nonlinear adaptive notch filter which operates based on the concept of an enhanced phase-locked loop (PLL). Applications of the filter for online signal analysis for power systems protection, control and power quality enhancement are presented. The proposed scheme can be applied for signal analysis both under stationary and nonstationary conditions. Based on digital time-domain simulations, applications of the filter for (a) sinusoidal waveform peak detection, (b) harmonic identification/detection, (c) detection/extraction of individual components of a signal, (d) instantaneous reactive current extraction, (e) disturbance detection, (f) noise reduction in zero-crossings detection, and (g) amplitude (phase) demodulation for flicker estimation, are presented.
307 citations
"Comparison of single phase shunt ac..." refers background in this paper
...b) Phase Locked Loop Method A novel phase locked loop, namely enhanced phase locked loop (EPLL) is presented in [19]....
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TL;DR: In this paper, an active power filter for single-phase power systems which are comprised of multiple nonlinear loads is presented. But the spectral performance of the active filter is not evaluated.
Abstract: This paper presents active power filters for single-phase power systems which are comprised of multiple nonlinear loads. The paper provides background on the operation of the filter, the details of the power circuit, the details of the control design, representative waveforms, and spectral performance for a filter which supports a 384 W AC controller and a 900 W uncontrolled bridge rectifier. Experimental data indicate that the active filter typically consumes 3% or less of the average load power, suggesting that a parallel filter is an efficient compensation approach. The spectral performance shows that the active filter brings the system into compliance with IEC-555 for decision frequencies in excess of 30 kHz. A discussion is presented outlining an alternative single-phase active filter which uses two controllable switches and is based on a half-bridge topology. >
212 citations
TL;DR: In this article, a new method of eliminating ac harmonic current is proposed, which is based on the principle of the magnetic flux compensation in a transformer core, by means of the new method, abnormal harmonics as well as normal harmonics can effectively be dealt with.
Abstract: A new method of eliminating ac harmonic current is proposed, which is based on the principle of the magnetic flux compensation in a transformer core. By means of the new method, abnormal harmonics as well as normal harmonics can effectively be dealt with. Considerations on the basic design of the new method are given.
209 citations
"Comparison of single phase shunt ac..." refers background in this paper
...The basic compensation principles [1]-[3] for active power conditioning were proposed in 1970’s....
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