Research on the Application of the High-capacity Hybrid Active Power Filter

The paper presents a new high-capacity hybrid active power filter (APF) to compensate harmonics and reactive power required by non-linear loads. The proposed one put the active component and fundamental serial resonant circuit in parallel through coupling transformer, and then put in series with passive component. Thus makes it unnecessary for APF to withstand fundamental component of power system and can improve the characteristic of suppressing harmonic current and degrade resonance of passive filter. The passive component makes reactive power compensation with active and passive component make harmonic suppression together. Finally the application results indicate that the APF system can provide the required signals to perform filtering and compensation