A New Strategy of Series-Shunt Power Quality Compensator

Abstract: Every new technology evolved with minimalism as well as stumbling blocks, as the recent innovations and excessive use of power electronic devices such as, fast switching uncontrolled/controlled converters, invertors and cyclo-converters, high voltage power converters used in HVDC etc. make the system flexible to work but also a complex problem of power quality has evolved, the measure of it was voltage and current harmonics, low power factor, reactive power demand etc. Ideally power system network must be electrically clean, harmonics free, balanced, regulated voltage at point of common coupling and must have a unity power factor. In this paper, the analysis of the Series-Shunt Power Quality Compensator (S-SPQC) is presented for three-phase three wire distorted system conditions, in this topology two types of active filter i.e. Series (SAF) and Parallel (PAF) are integrated to accomplish the goal of improving voltage quality by SAF and current quality by PAF. In combined approach of S-SPQC, SAF part is designed by using Synchronous Reference Frame (SRF) technique while PAF part is designed by using Indirect Current Control (ICC) technique. The MATLAB/ Simulink based simulation results are graphically shown as well as tabulated in detail which reflects the performance of the S-SPQC control method discussed in this paper.

Keywords: Power Quality, Harmonics, Direct and Quadrature Axes, Series-Shunt Power Quality Compensator (S- SPQC), Voltage Reference Generation, Current Reference Generation