scholarly journals Design of shunt hybrid active power filter (SHAPF) to reduce harmonics in AC side due to Non-linear loads

2018 ◽  
Vol 9 (4) ◽  
pp. 1926
Author(s):  
Madhu B R ◽  
Dinesh MN ◽  
Ravitheja BM
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Control Technique ◽  
Band Pass Filter ◽  
Shunt Active Filter ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Non Linear

<p>The quality of power is a major concern because of harmonics in the lines due to various sources. Passive filters have been used to eliminate the specific harmonics. In this paper shunt hybrid active power filter which consists of shunt active filter and shunt passive filter is designed to reduce harmonics in source   side for non linear loads. The shunt passive filter includes a tuned RLC circuit that behaves like a band-pass filter for a particular harmonic content. The shunt active filter is a VSI that produces reverse harmonic current based on Clarke’s transformation. This paper presents the control strategy by implementing instantaneous reactive power theory to design Shunt Hybrid Active Filter (SHAPF) for a non linear load. The proposed control technique is simulated using MATLAB SIMULINK, Results prove there is considerable reduction in THD of source current from 30.35% to 3.25% with the proposed controller on   shunt hybrid active power filter.   The performance of SHAPF is better than Passive and Shunt Active Power Filters.</p><p> </p>

Application of Adaptive Tabu Search Algorithm in Sinusoidal Fryze Voltage Control based Hybrid Series Active Power Filter

2014 ◽  
Vol 3 (2) ◽  
pp. 59-75
Author(s):  
Saifullah Khalid ◽  
Neeraj Kumar ◽  
V.M. Mishra
Keyword(s):  
Tabu Search ◽  
Search Algorithm ◽  
Load Condition ◽  
Active Power Filter ◽  
Voltage Control ◽  
Active Power ◽  
Control Technique ◽  
Tabu Search Algorithm ◽  
Power Filter ◽  
Non Linear

A novel hybrid series active power filter to eliminate harmonics and compensate reactive power is presented and analyzed. The proposed active compensation technique is based in a hybrid series active filter using adaptive Tabu search (ATS) algorithm in the conventional Sinusoidal Fryze voltage (SFV) control technique. Optimization of the conventional Sinusoidal Fryze voltage control technique has been done using adaptive tabu search algorithm. This paper discusses about the comparative performances of conventional Sinusoidal Fryze voltage control strategy and ATS-optimized controllers. ATS algorithm has been used to obtain the optimum value of Kp and Ki. Analysis of the hybrid series active power filter system under non linear load condition and its impact on the performance of the controllers is evaluated. Effectiveness of the hybrid series active power filter to provide harmonic damping is demonstrated by MATLAB/Simulink results. Total harmonic distortion (THD) demonstrates the practical viability of the controller for hybrid series active power filter to provide harmonic isolation of non-linear loads and to comply with IEEE 519 recommended harmonic standards.

Research on Harmonic Suppression of Electric Railway Based on Hybrid Active Power Filter

2010 ◽  
Vol 439-440 ◽  
pp. 994-998
Author(s):  
Xiang Zheng Xu ◽  
Bai Chao Chen
Keyword(s):  
Specific Property ◽  
Active Power Filter ◽  
Active Power ◽  
Supply System ◽  
Fundamental Wave ◽  
Harmonic Suppression ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Electric Railway

According to the specific property of traction supply system, a novel hybrid active power filter (HAPF) is designed in this paper. The new HAPF topology is that, after the impedance of fundamental wave is in parallel with the active power filter (APF), it is series connected passive filter. The kinds of structure can reduce the VA rating of the APF greatly. The small rating active power filter is used to improve filtering characteristics of the passive filter and suppress possible resonance between the traction supply system impedance and the passive filter. Through MATLAB simulation, it shows that the control strategy of power quality is apparently effective, and it plays an important role in enhancing the reliability of transformer station and the operating security of electric railway.

scholarly journals Stability analysis of hybrid active power filter

2014 ◽  
Vol 62 (2) ◽  
pp. 279-286
Author(s):  
D. Buła ◽  
M. Pasko
Keyword(s):  
Stability Analysis ◽  
Active Power Filter ◽  
Active Power ◽  
Loop Control ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Analysis System ◽  
The Stability ◽  
Hybrid Filters

Abstract In the paper the analysis of a three-phase hybrid active power filter stability has been presented. Configuration with a single tuned passive filter was used as an example. However, the analysis can be applied to similar configurations of hybrid filters with closed loop control. The article presents a model of the analyzed system in the frequency domain. The division of the model into two independent systems, for positive and negative components, allowed to apply the Nyquist criterion for the stability analysis in this case. As a part of the analysis, the effect of delays, control signal filter parameters, and passive filter parameters have been examined. Based on the presented stability analysis, system parameters for the experimental model of a hybrid power filter have been selected. Finally, experimental results confirming the validity of the analysis have been shown.

scholarly journals A Novel Hybrid Active Power Filter with Multi-Coupled Coils

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 998
Author(s):  
Gang Xue ◽  
Baichao Chen ◽  
Cuihua Tian ◽  
Jiaxin Yuan ◽  
Yuxiong Zhou ◽  
...  
Keyword(s):  
Power Grid ◽  
Active Power Filter ◽  
Magnetic Coupling ◽  
Active Power ◽  
Passive Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Filtering Effect ◽  
Lc Filter ◽  
Coupled Coils

This paper proposes a hybrid active power filter (HAPF) with multi-coupled coils, applied to a medium- and high-voltage power grid. The passive filter of the proposed HAPF adopts the structure of multi-coupled coils to compress the traditional multiple LC branches into one branch which presents the same harmonic impedance characteristics as the former multiple LC branches. In the active power filter of the HAPF, a coupled inductor, instead of a transformer, is used to connect with the passive filter. The coupled inductor has mutual inductances with inductors of the passive filter. Through spatial magnetic coupling, the active power filter can inject compensation current into the power grid to eliminate the residual harmonics and absorb active power from the power grid to maintain the DC capacitor voltage. When the active power filter is open-circuited or short-circuited, the filtering effect of the passive filter can still be guaranteed, which improves the reliability of the filter. The benefits of the proposed HAPF with excellent harmonic filtering performance are that the inductors occupy only 1/3 space as compared with traditional three-tuned LC filter, and very small power of the active power filter. The feasibility of the proposed HAPF is verified through simulations and experiment.

scholarly journals Four-leg active power filter control with SUI-PI controller

2021 ◽  
Vol 11 (4) ◽  
pp. 2768
Author(s):  
Mohamed M. El-sotouhy ◽  
Ahmed A. Mansour ◽  
Mostafa I. Marei ◽  
Aziza M. Zaki ◽  
Ahmed A. EL-Sattar
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Current Source ◽  
Active Power Filter ◽  
Industrial Applications ◽  
Active Power ◽  
Active Filter ◽  
Active Filters ◽  
Power Filter ◽  
Non Linear

<span>Four-leg active power filter is considered one of the greatest vital active filters that are frequently used in industrial applications, especially those that need to be controlled in each individual phase. Also, to control the neutral current that created because of a lot of unbalanced and non-linear loads. In this paper, the used active filter was controlled by a proposed control method which can achieve simplicity and intelligence at the same time. The novelty of this paper is using the proposed controller with Four-leg active power filter. This controller relies on instantaneous reactive power theory, which used to create the required currents that are injected into the network via the used active filter to remove the problems created by unbalanced and non-linear loads. It is also maintained that the current source a pure sinusoidal wave. The system is implemented on MATLAB/Simulink. The simulation results proved the preference of the proposed controller than the conventional proportional-integration controller, where it reduced the percentage of total harmonic distortion for the current source<em><span lang="AR-SA" dir="RTL">.</span></em></span>

Platform Specific FPGA Based Hybrid Active Power Filter for Power Quality Enhancement

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Santanu Kumar Dash ◽  
Pravat Kumar Ray
Keyword(s):  
Power Quality ◽  
Active Power Filter ◽  
Active Power ◽  
Control Technique ◽  
System Generator ◽  
Power Filter ◽  
Power Filters ◽  
Hybrid Active Power Filter ◽  
Xilinx System Generator ◽  
And Performance

Abstract Elimination of harmonics by the use of power filters is required for power quality improvement; provides a wide area for the researchers to develop efficient power filters with improved control platforms. This paper motivates the implementation of the embedded control platform for better control of the power filters for faster elimination of harmonics. Although many embedded processors fascinates the implementation of the control techniques but finding the feasible platform is a great task. Software implementations are feasible for most of the power electronics converters but the hardware design with required digital hardware is a challenging task. The present paper deals with the development of the control technique for the Hybrid Active Power Filter with Xilinx System Generator Platform. The virtual FPGA (Field Programmable Gate Array) platform provided by the Xilinx System Generator has the ability to generate better switching signals for the control of the power filter to generate compensating signal for elimination of harmonics to maintain the power quality in the distribution lines. Experimental results obtained by the setup developed in the Power System Laboratory presents the effectiveness of the Embedded Platform. Various source voltage conditions also simulated and performance is verified for the developed Hybrid Active Power Filter.

Comparison of Current Control Strategies of Shunt Active Power Filter 

2014 ◽  
Vol 573 ◽  
pp. 59-65
Author(s):  
B.S. Nalina ◽  
V.J. Vijayalakshmi
Keyword(s):  
Power Systems ◽  
Control Strategies ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Shunt Active Power Filter ◽  
Shunt Active Filter ◽  
Power Filter ◽  
Harmonic Currents ◽  
Non Linear

Nowadays the number of non linear loads in power systems is increasing dramatically. These non linear loads inject harmonic currents and voltage which makes the supply currents non-sinusoidal. These harmonics are eliminated via an active power filter. The reference currents are generated by shunt active filter which is provided to compensate harmonic currents demanded by the load. Different current control strategies are implemented to improve the performance of shunt active power filter. These techniques are useful in making the supply currents sinusoidal. The performance of the current control techniques are different from each other. The %THD can be reduced with the aid of shunt active power filter. In this paper, different current control schemes are analyzed and their outputs are compared to determine the effectiveness. The most effective current controller generates less %THD. The power quality of the system is improved with the reduction of %THD. The different current controllers which are compared in this paper are GA controller and PI-VPI controller.Under analysis, the PI-VPI controller is found to be effective.

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