Simulation and RTDS Hardware implementation of SHAF for current harmonics cancellation using Id-Iq control strategy with PI and fuzzy controllers

The main objective of this paper is to develop PI and Fuzzy controllers to analyse the performance of instantaneous real active and reactive current (i
_d
-i
_q
) control strategy for extracting reference currents of shunt active filters under balanced, unbalanced and balanced non-sinusoidal conditions. When the supply voltages are balanced and sinusoidal, the all control strategies are converge to the same compensation characteristics; However, the supply voltages are distorted and/or un-balanced sinusoidal, these control strategies result in different degrees of compensation in harmonics. The p-q control strategy unable to yield an adequate solution when source voltages are not ideal. Extensive simulations were carried out; simulations were performed with balance, unbalanced and non sinusoidal conditions. Simulation results validate the dynamic behaviour of fuzzy logic controller over pi controller. The 3-ph 4-wire shunt active filter (SHAF) system is also implemented on a Real Time Digital Simulator (RTDS Hardware) to further verify its effectiveness. The detailed simulation and RT DS Hardware results are included.