A Novel High Performance Current Control for Shunt Active Filters

This paper proposes an accurate and simple current control for shunt active filters (SAF) based on a P+Resonant compensator used in conjunction with traditional PI control. The proposed current control system is designed to operate with a single dq reference frame, synchronous with the 50 Hz supply voltage, for the compensation of 5th and 7th harmonics. Another major advantage of this strategy is the ability to eliminate the external disturbance from the 5th and 7th harmonic components caused by power supply. The principle of the proposed control method and the design procedure is here presented. Control stability under the variation of supply impedance is also investigated. Simulation and experimental results confirm the effectiveness of the suggested approach