Iterative Learning Control for Current-tracking of Shunt Hybrid Active Power Filter

Due to the traditional PI controller can only deal with given direct current signal,and can not control cycle harmonic signal well,the performance of shunt hybrid active power filter used traditional PI controller is not satisfied.According to the character of re-period of current harmonics in steady-load power system,this paper presents an algorithm of PI-type iterative learning control,in the same of using a forgetting factor to enhance systemic robust;and constructing a feed forward based D-type learning law of inferenced current error by fuzzy reasoning to improve its dynamic performance.The proposed algorithm is small computation capacity and easy to realize.Simulation and engineering results confirm the value of the algorithm.