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http://dx.doi.org/10.6113/JPE.2014.14.6.1303

Improvement of Dynamic Behavior of Shunt Active Power Filter Using Fuzzy Instantaneous Power Theory  

Eskandarian, Nasser (Department of Electrical and Computer Engineering, Semnan University)
Beromi, Yousef Alinejad (Department of Electrical and Computer Engineering, Semnan University)
Farhangi, Shahrokh (School of ECE, College of Engineering, University of Tehran)
Publication Information
Journal of Power Electronics / v.14, no.6, 2014 , pp. 1303-1313 More about this Journal
Abstract
Dynamic behavior of the harmonic detection part of an active power filter (APF) has an essential role in filter compensation performances during transient conditions. Instantaneous power (p-q) theory is extensively used to design harmonic detectors for active filters. Large overshoot of p-q theory method deteriorates filter response at a large and rapid load change. In this study the harmonic estimation of an APF during transient conditions for balanced three-phase nonlinear loads is conducted. A novel fuzzy instantaneous power (FIP) theory is proposed to improve conventional p-q theory dynamic performances during transient conditions to adapt automatically to any random and rapid nonlinear load change. Adding fuzzy rules in p-q theory improves the decomposition of the alternating current components of active and reactive power signals and develops correct reference during rapid and random current variation. Modifying p-q theory internal high-pass filter performance using fuzzy rules without any drawback is a prospect. In the simulated system using MATLAB/SIMULINK, the shunt active filter is connected to a rapidly time-varying nonlinear load. The harmonic detection parts of the shunt active filter are developed for FIP theory-based and p-q theory-based algorithms. The harmonic detector hardware is also developed using the TMS320F28335 digital signal processor and connected to a laboratory nonlinear load. The software is developed for FIP theory-based and p-q theory-based algorithms. The simulation and experimental tests results verify the ability of the new technique in harmonic detection of rapid changing nonlinear loads.
Keywords
Fuzzy instantaneous power (FIP) theory; Fuzzy logic controller; p-q theory; Time-varying harmonic;
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