A new current tracking control method for high power active power filter

The paper is talked about a new current tracking control method for low-voltage high-power active power filter. The main circuit topology of APF adopts a three-phase three-line voltage source converter, which is constituted by three H-bridges. Current tracking control method of APF determines the APF performance. For high-power APF, the switching frequency of APF system is difficult to improve, resulting in a relatively narrow control bandwidth of the current loop, which affects the stability of the APF. How to solve the system switching frequency and system control bandwidth contradictions become critical. This paper presents a new hybrid control strategy, which can achieve the ideal control effect of harmonic suppression and unbalanced reactive power compensation.