Comparison techniques using phase – loop locked (PLL) and synchronous references frame (SRF) controller to mitigate voltage flicker

Abstract

Voltage flicker is one of the vital disruptions in electrical distribution power systems. An electric arc furnace is considering as one of the major causes of voltage flicker due to it an unbalanced, nonlinear and time-varying behaviours. Distribution Synchronous static compensator (D-STATCOM) has been shown to be a competent and dynamic device to compensate voltage flicker in power system. This paper presents a comparison between Phase-Loop Locked (PLL) Controller and Synchronous References Frame (SRF) Controller technique for 6-pulse D-STATCOM to compensate voltage flicker due to electric arc furnace load. To observe the effectiveness of the proposed technique, testing has been conducted on IEEE 13 distribution bus test system. The simulation results show the effectiveness of 6-pulse D-STATCOM using PLL Controller compare to the SRF Controller techniques to alleviate the fast-varying voltage flicker.