A Blend Control Scheme of Active Power Filter Based on Harmonic Voltage

2011 ◽  
Vol 268-270 ◽  
pp. 434-439
Author(s):  
Chen Guo ◽  
Cun Bing Gui ◽  
Jian Huang
Keyword(s):  
Distribution System ◽  
Active Filter ◽  
Laboratory System ◽  
Nonlinear Load ◽  
Shunt Active Filter ◽  
Power Filter ◽  
Control Scheme ◽  
Harmonic Voltage ◽  
The Relationship ◽  
Current Detection

This paper proposes a blend control scheme of APF based on harmonic voltage to solve the problem that load current detection APF cannot change the harmonic impedance in distribution system. In addition, based on the relationship between the rated volt-ampere of APF and the load volt-ampere, the conductance value could automatic adjustment. Computer simulation and laboratory system are designed and constructed to verify the validity and effectiveness of the shunt active filter equipped with the blend control. The shunt active filter with blend control not only can compensate the nonlinear load harmonic current but also can help to damp the harmonic voltage in distribution system.

scholarly journals Multiple AI based Controlling Techniques for Power Filter Output Quality Improvement

2021 ◽  
Vol 7 (1) ◽  
pp. 11-20
Author(s):  
Rajesh Raghuvanshi ◽  
Dr Sukul Lomash
Keyword(s):  
Distribution System ◽  
Output Voltage ◽  
Learning Algorithm ◽  
Harmonic Distortion ◽  
Active Filter ◽  
Voltage Source ◽  
Quality Factors ◽  
Nonlinear Load ◽  
Shunt Active Filter ◽  
Power Filter

The excessive of power electronics devices in distribution system has evolved the problem of power quality. This work represents the effective solution of shunt active power filter for eliminating the harmonics to maintain the quality of utility power supply. In the proposed scheme shunt active filter acts as a voltage source and eliminates harmonics by injecting equal but opposite harmonics components at the point of common coupling. Simulation of shunt active filter based on instantaneous reactive has been achieved in the MATLAB/SIMULINK environment. The controllers are being designed with the objective of reducing the THD% in voltage and current available at the nonlinear load terminal of the system. The controller incorporated optimization algorithms based on the artificial intelligence techniques as well. The comparative analysis of the effectiveness and efficiency of the controllers in improving the quality factors has been carried out. The distortion level in the output voltage waveforms in both the cases being fed to the load when compared, it is found that proposed hybrid structure of control for the filter is more effective in reducing the distortion as compared to standard PQ theory based architecture. The study concluded that the total harmonic distortion in the voltage output waveform being fed to the load using only PQ theory based online learning algorithm is found to be 1.59 % while in case of the output voltage at the load terminal from the power filter using proposed hybrid algorithm comprising of NN learning with CSA optimizing control and PQ_RLS algorithm for THD reduction the THD% level is 0.43 %.

scholarly journals Harmonics Mitigation Techniques in Renewable Energy Systems using Shunt Active Power Filter

2020 ◽  
Vol 9 (5) ◽  
pp. 377-381
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Fuzzy Logic Controller ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Nonlinear Load ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Simulation Results

This paper depicts the methodology of improving power quality at load end is connected with renewable source of energy for power generation. The excessive of power physics devices in distribution system has evolved the matter of power quality. Shunt active power filter (SAPF) acts as a current supply and suppresses the harmonics by introducing the same amount of compensating opposite harmonics component along with common coupling. Simulation design of SAPF based on d-q model is implemented using MATLAB/simulink Toolbox. It explores the modelling of a Proportional Integral (PI) and fuzzy logic controller (FLC) based, SAPF for a 3 wire network to compensate current harmonics fed to a nonlinear load. The proposed model can be validated and its robustness will be checked through the simulation results. Simulation results illustrate that the logic based active filter out performs the PI based shunt active filter.

Intelligent Controller for Shunt Active Power Filter to Improve Power Quality

2014 ◽  
Vol 573 ◽  
pp. 40-45
Author(s):  
S.S. Lalitha Maheswari ◽  
V. Revathi ◽  
S. Muralidharan
Keyword(s):  
Distribution Systems ◽  
Fuzzy Controller ◽  
Active Filter ◽  
Voltage Source ◽  
Nonlinear Load ◽  
Shunt Active Power Filter ◽  
Shunt Active Filter ◽  
Power Filter ◽  
Three Phase ◽  
Bridge Rectifier

This paper presents a comparative study on performance of conventional PI controller and fuzzy controller on three phase, three wire voltage source inverter based shunt active filter that is used to compensate the harmonics currents drawn by non-linear loads in distribution systems. Hysteresis PWM method is used to generate the pulses to the switches used in active filter. The compensation is based on PLL method of fundamental current extraction. The nonlinear load taken into account is a three phase diode bridge rectifier.

A Shunt Active Power Filter for 12 Pulse Converter Using Source Current Detection Approach

2016 ◽  
Vol 7 (1) ◽  
pp. 225 ◽  
Author(s):  
Rajesh T ◽  
Nirmalkumar A
Keyword(s):  
Distribution System ◽  
Active Power Filter ◽  
Active Power ◽  
Detection Methods ◽  
Shunt Active Power Filter ◽  
Power Distribution System ◽  
Power Filter ◽  
Pulse Converter ◽  
Source Current ◽  
Current Detection

A shunt Active Power Filter (APF) with current detection at the source side is considered as a closed-loop system from the view of the whole power distribution system, which is expected with better harmonics filtering performance compared with conventional current detection methods such as load current detection and open loop control.  This paper introduces an efficient source current detection method (direct) control scheme to mitigate the grid current harmonics generated by the twelve pulse converter.  The proposed system uses Control Rectifier (12 –pulse converter) which efficiently regulates the DC voltage by varying the angle of each 6 pulse converter. Moreover, the proposed system uses three winding transformer which eliminates the harmonics during equal angles switching at each six pulse converter which in turn simplifies the operation of the SAPF. The proposed system is simulated in MATLAB SIMULINK to evaluate the performance of the proposed system.

scholarly journals An Efficient Shunt Active Filter for Harmonic Reduction in Hospital Building Electrical Installation

2019 ◽  
Vol 8 (4) ◽  
pp. 8161-8166
Keyword(s):  
Distribution System ◽  
Active Filter ◽  
Active Filters ◽  
Distribution Transformer ◽  
Air Conditioners ◽  
Shunt Active Filter ◽  
Excessive Heat ◽  
Harmonic Reduction ◽  
Hospital Building ◽  
Electrical Installation

This paper proposes an efficient shunt active filter for harmonic reduction in hospital building electrical installation. Harmonic installation in distribution system is caused by non-linear electrical loads, especially those containing coils, such as air conditioners, pump machines, fans, and others. Harmonic can cause excessive heat in a distribution transformer that supplies an electrical installation in a multi-storey building. This heat is a power loss and has the potential to shorten the life of a distribution transformer, so that efforts are needed to reduce harmonics. One effective method to reduce harmonics is to use active filters. In this study, a shunt active filter application in the electrical installation of a hospital building was carried out. The results showed that the filter was able to reduce harmonic currents significantly, so that the harmonic threshold was still in accordance with the IEEE standard.

scholarly journals Performance Investigation of Grid-Connected DFIG using Integrated Shunt Active Filtering Capabilities

2020 ◽  
Vol 184 ◽  
pp. 01041
Author(s):  
Krishna S. Patel ◽  
Vijay H. Makwana
Keyword(s):  
Pulse Width Modulation ◽  
Reactive Power ◽  
Active Filter ◽  
Current Control ◽  
Control Technique ◽  
Nonlinear Load ◽  
Shunt Active Filter ◽  
Grid Current ◽  
Wind Speeds ◽  
Active Filtering

This paper presents the modified grid side converter control (GSC) technique which enable the GSC to work as a shunt active filter to mitigate the grid current harmonics produced by the nonlinear load, as well as to transfer power from the grid to the rotor of doubly fed induction generator (DFIG) or vice versa. The main contribution of this proposed technique is an addition of a shunt active filter with space vector pulse width modulation (SVPWM) controller in GSC control itself in order to achieve a better grid current %THD profile, and simultaneously to control active power for variable wind speed. The reactive power supply to the DFIG and extraction of maximum power is achieved using RSC. The comparison of the modified GSC control technique using hysteresis current control (HCC), and SVPWM controller used to mitigate the harmonics is presented with different wind speeds. The proposed modified GSC control technique is simulated for grid-connected 2.6 MW DFIG based wind energy conversion system (WECS) in MATLAB Simulink environment.

scholarly journals Voltage Regulation Performance of a Shunt Active Filter Intended for Installation on a Power Distribution System

2003 ◽  
Vol 123 (11) ◽  
pp. 1351-1358 ◽  
Author(s):  
Hiroshi Yamashita ◽  
Pichai Jintakosonwit ◽  
Hideaki Fujita ◽  
Hirofumi Akagi ◽  
Junya Shinohara ◽  
...  
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Voltage Regulation ◽  
Active Filter ◽  
Shunt Active Filter ◽  
Power Distribution System
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