Open AccessModelling and control of a hybrid power filter to compensate harmonic distortion under unbalanced operation
Author(s) -
ValdezFernandez Andres A.,
Escobar Gerardo,
MartinezRodriguez Panfilo R.,
Sosa Jose M.,
CamposDelgado Daniel U.,
LopezSanchez Manuel J.
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0263
Subject(s) - control theory (sociology) , total harmonic distortion , harmonic , compensation (psychology) , active filter , thd analyzer , controller (irrigation) , filter (signal processing) , distortion (music) , engineering , voltage , computer science , topology (electrical circuits) , electronic engineering , intermodulation , physics , control (management) , acoustics , electrical engineering , amplifier , cmos , artificial intelligence , psychology , agronomy , psychoanalysis , biology
This study presents a model‐based controller for a hybrid power filter (HPF) to reduce the current harmonic distortion in a three‐phase system for a general operation case considering unbalanced and distorted source voltages and load currents. The HPF comprises an active power filter (APF) grid connected by means of an LC passive filter. This topology is aimed to reduce the current rating handled by the APF, representing a cost effective solution. The controller design is split into two stages, a first one to control the fundamental component of the system dynamics, and to regulate the DC voltage; and a second stage to compensate the harmonic distortion caused by a non‐linear load. For this, the harmonic compensation scheme forces the injection of the required harmonic current to the point of common coupling. The proposed scheme keeps the very familiar proportional–resonant control structure. The compensation of the load reactive current is left to the passive filter. Experimental and simulation results are presented to exhibit the benefits of the proposed control solution.