Research on series-shunt compound control applying to shunt active power filter

The basic principle of shunt active power filter(SAPF) is that the output compensation current is equal to the harmonic current with reverse direction, the performances of SAPF contain dynamic response and static precision. Aiming at the defect of PI control applying to SAPF has low static precision, compound control method based on putting repetitive control and PI control in series-shunt is put forward. The repetitive control is used to improve the static precision of harmonic compensation and the PI control is used to improve dynamic response. Emulated results indicate the series-shunt compound control has better performances than single PI control and shunt compound control. The experimental results verify the viability and effectiveness of the proposed method.