Power quality enhancement using intelligent controllers for a Nine Switch Converter based UPQC [articol]

Abstract

A unified power quality conditioner is a FACTS device which consists of both shunt and series converter with DC link capacitor. Each converter has six switches and these switches are controlled in order to mitigate power quality issues. A nine switch UPQC topology is proposed to reduce the switches in UPQC. But this topology has some limitations such as more switching stress, high value of DC link voltage etc. Hence in this work, intelligent control techniques are implemented in this nine switch UPQC to overcome the aforementioned issues. The proposed control techniques for UPQC are implemented in MATLAB/Simulink and the results are validated for various Nonlinear loads, sag and swell conditions.