New Method to Harmonic Isolation Based on High Selectivity Filter to Control of Shunt Active Filter with Experimental Validation Using DSPACE System

2014 ◽  
Vol 666 ◽  
pp. 53-58
Author(s):  
Mohamed Muftah Saleem
Keyword(s):  
High Selectivity ◽  
Control Method ◽  
Active Filter ◽  
Current Control ◽  
Control Technique ◽  
Harmonic Compensation ◽  
Shunt Active Filter ◽  
Active Power Filters ◽  
Power Filters ◽  
Current Controller

This paper presents a new control method of a parallel active power filters based on improved harmonic isolation with hardware implementation. The harmonic isolator is based on High Selectivity Filters (it can be tuned at any frequency) and the current control technique consists in a modulated hysteresis current controller. This active filter is intended for harmonic compensation of a diode rectifier feeding a RL load. The study of the active filter control is divided in two parts. The first part deals with the harmonic isolator which generates the harmonic reference currents and is implemented into a DSPACE DS1104 prototyping card. The second part focuses on the generation of the switching pattern of the IGBTs of the inverter by the modulated hysteresis current controller, implemented into an analogue card. The use of High Selectivity Filters instead of classical extraction filters allows extracting directly the voltage and current fundamental components in the α-β axis at high performances. The effectiveness of the new proposed method is verified by computer simulation and by experimental study.

scholarly journals Adaptive filter based current controller for Shunt Active filter

2018 ◽  
Vol 7 (2.24) ◽  
pp. 545
Author(s):  
R Sriranjani ◽  
S Jayalalitha
Keyword(s):  
Adaptive Filter ◽  
Reactive Power ◽  
Load Condition ◽  
Active Filter ◽  
Current Control ◽  
Control Technique ◽  
Nonlinear Load ◽  
Shunt Active Filter ◽  
Current Controller ◽  
Linear Load

This paper deals with the harmonic mitigation and reactive power compensation using Shunt Active filter. The performance of the Shunt active filter depends on the design and current control technique for generating a reference current. The design of the filter involves the iterative procedure for choosing the filter components so that it compensates the harmonics and reactive power for maximum load condition. The current controller method adopted for indirect current control technique where the reference signal is similar to the supply current signal. The Adaptive filter used in current controller mitigates harmonics and reactive power and voltage control loop of SAF balancing the active power between the load and supply unit. The learning rate is fixed by repeated simulation. The SAF active filter is tested in four load condition ie., nonlinear load(37% Total Harmonic Distortion(THD)),highly nonlinear load(>100% THD), linear load(<8% THD, power factor(pf) <0.5) and both nonlinear and linear load(37% THD and 0.7 pf). The study is carried out in MATLAB Simulink and the results are presented.  

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 Shunt Active and Series Active Filters-Based Power Quality Conditioner for Matrix Converter

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
P. Jeno Paul
Keyword(s):  
Power Quality ◽  
High Performance ◽  
Matrix Converter ◽  
Active Filter ◽  
Active Filters ◽  
Shunt Active Filter ◽  
Active Power Filters ◽  
Power Filters ◽  
The Matrix ◽  
Power Quality Conditioner

This paper proposes a series active filter and shunt active filter to minimize the power quality impact present in matrix converters instead of passive filter. A matrix converter produces significant harmonics and nonstandard frequency components into load. The proposed system compensates the sag and swell problems efficiently in matrix converter. The proposed system has been tested and validated on the matrix converter using MATLAB/Simulink software. Simulated results confirm that the active power filters can maintain high performance for matrix converter.

scholarly journals An Improved Control Method Based on Source Current Sampled for Shunt Active Power Filters

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1405 ◽  
Author(s):  
Xudong Cao ◽  
Kun Dong ◽  
Xueliang Wei
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Active Power ◽  
Current Control ◽  
Pi Control ◽  
Current Loop ◽  
Active Power Filters ◽  
Power Filters ◽  
Source Current ◽  
The Impact

Active power filters (APFs) are dynamic power electronic devices that suppress harmonics and reactive power. To simplify the detection and extraction of traditional APF harmonics and reactive current, this paper proposes a direct source current control based on a three-phase three-wire shunt APF. The compensation principle and control method of the source current are analyzed systematically. The currents can be controlled without static errors by a proportional-integral (PI) controller in d-q rotating coordinates. Therefore, the compensation accuracy and dynamic performance of the system can be improved by the control strategy. Moreover, considering the grid voltage fluctuations, a droop regulator is proposed to address the impact of DC-link voltages on APF power losses and compensation performance. The regulator is combined with a traditional voltage outer loop PI control to achieve a comprehensive optimization between the power loss and compensation performance of the APF system. Finally, the inner current loop and the outer voltage loop form a double closed-loop cascade PI control structure to achieve the control effect of the APF. Simulation and experimental results verified the validity and feasibility of the APF control approach.

A robust digital current control method for active power filters

2000 ◽  
Vol 36 (4) ◽  
pp. 1158-1164 ◽  
Author(s):  
M. Sedighy ◽  
S.B. Dewan ◽  
F.P. Dawson
Keyword(s):  
Control Method ◽  
Active Power ◽  
Current Control ◽  
Active Power Filters ◽  
Power Filters
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