A new current tracking control method for three-phase three-line active power filter

Three-phase bridge converter topology is difficult to meet the requirements for low-voltage high-power APF. In this paper, the topology of APF adopts a three-phase three-line voltage source converter, which is Delta-connection by three single 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. Switching frequency and bandwidth control system of APF can not take into account. The paper is talked about a new current tracking control method for high-power active power filter. This paper presents a new hybrid control strategy, which can achieve the ideal control effect of harmonic suppression and unbalanced reactive power compensation.