Hybrid Controller for Three Level Shunt Active Power Filter to Reduce Supply Current Harmonics for Power Quality Improvement

Elango Sundaram ； Manikandan Venugopal

《Research Journal of Applied Sciences, Engineering and Technology》 10卷5期 (2015/06) Pp. 581-590

並列摘要

Shunt Active Power Filter (SAPF) of electric power has become a grown-up technology for mitigating supply current harmonics and compensation of reactive power in the grid. In this study, a combined Proportional Integral (PI) and Fuzzy Logic Controller (FLC) are proposed to extract required reference current of the SAPF for balanced, unbalanced with static and dynamic conditions. The DC bus voltage of three level diode clamped multilevel PWM inverter functioning as a SAPF is maintained at stable value by regulating the current error using the conjunction of PI and FLC algorithm. Switching pulses for the multilevel inverter are generated from the sampled reference phase voltage magnitudes as in the case of conventional space vector PWM. The implementation of PI and FLC algorithm is executed using MATLAB fuzzy logic tool box. The simulation results shows that, the proposed model provides with low harmonic content in supply side and necessary reactive power is supplied to the Point of Common Coupling (PCC) thereby power factor of the system is improved in both static and dynamic conditions.

並列關鍵字

Active power filter ； fuzzy logic ； harmonics ； power factor ； proportional integral ； reactive power