Power Quality Improvement by Using Modular Multilevel Cascade Converter Based UPQC

Abstract

The widespread use of non-linear loads is leading to a variety of undesirable phenomena in the operation of power systems. The harmonic components in current and voltage waveforms are the most important among these. Conventionally, passive filters have been used to eliminate line current harmonics. However, they introduce resonance in the power system and tend to be bulky. So, active power line conditioners have become more popular than passive filters as it compensates the harmonics and reactive power simultaneously. This paper presents the power quality improvement by using multilevel cascade converter based UPQC. total circuit is implemented using MATLAB software.