A Fuzzy Logic Controlled Sliding Mode Control (SMC) of Inverter in Shunt Active Power Filter for Power Quality Improvement

摘要

In this study, author proposes a fuzzy controlled sliding mode control of inverter in shunt active power filter in order to minimize the harmonics pollution and related effects in the utility which are caused by the rapid growth of active and non linear loads. we proposes a simple and new modeling approach based on Fourier transform applied to the inverter leading a state space model in the a-b-c frame. While, compared to d-q frame modeling approach, this alternative exhibit good dynamic response, simple to handle and robustness and stability. In addition the reference current is generated based on Fourier transform. Furthermore, the switching signals of the inverter are generated by sliding mode control concept and their stability condition is reviewed to prove its existence. This system is developed and simulated under MATLAB 7.3/SIMULINK package. The effectiveness of this proposed control system is high lighted in terms of THD in the source current through simulation results.