CONTROL SCHEMES FOR SHUNT ACTIVE FILTERS TO MITIGATE HARMONICS USING TRIANGULAR CARRIER CURRENT CONTROLLER

This paper presents a method for obtaining the desired reference current for Voltage Source Converter (VSC) of the Shunt Active Power Filter (SAPF) using Synchronous Reference Frame Theory. The method relies on the performan ce of the Proportional - Integral (PI) controller for obtaining the best control performance of the SAPF using Particle Swarm Optimization (PSO) . SA P F compensates the harmonics by injecting a compensating current which is equal in magnitude but opposite in p hase to the disturbance in the system. The current controller based on Triangular Carrier Current Controller is used to generate the gate pulses. Compensation current is generated to track command current so as to eliminate the harmonic current of non - lin ear load and reduced total harmonic distortion (THD), improved accuracy and strong robustness in the presence of parameters variation and nonlinear load. The results of simulation study of APF control technique presented in this paper are found quite satis factory to eliminate harmonics and reactive power components from source current.