POWER QUALITY IMPROVEMENT USING SHUNT ACTIVE POWER FILTER WITH HYBRID NON-LINEAR CONTROLLER IN THREE PHASE FOUR WIRE FOR DIODE LOAD

Abstract

This paper describes the reactive power compensation and harmonic reduction in non-linear load with help of Hybrid Non-Linear Controlled (HNLC) Shunt Active Power Filter (SAPF) in three phase four wire system. The diode load is tested with hybrid controller for harmonic reduction in 3Ø, 4wire system. The SAPF contains control loop namely hysteresis current loop for current shaping inner loop and the voltage regulation of DC link controlled by outer loop. The outer loop is selected as HNLC such Sliding Mode Control (SMC) plus Proportional Integral Controller (PIC) and Fuzzy Logic Controller (FLC) plus Proportional Integral Controller (PIC). HNLC and synchronous reference frame theory receive the reference current for inner current loop indirectly. The performance of HNLC is validated at various load operating conditions by creating the Matrix Laboratory (MATLAB)/ Simulink