适用于船舶微电网的直流有源滤波器研究

Research on a Direct Current Active Power Filter for Marine Microgrid

在船舶微电网中,一些直流敏感负载对纹波的要求极高,为此,提出基于直流有源滤波器(DC-APF)的船舶微电网纹波抑制方法。在基于48脉波整流发电机的船舶微电网系统下,设计了适用于该系统的DC-APF模型。为实现对高频谐波的抑制,解决系统频率发生变化时DC-APF的补偿效果问题,提出了基于自适应准比例谐振(PR)和比例积分(PI)复合控制的电流跟踪方法。为解决负载变化时DC-APF的直流侧电压的稳定问题,采用双有源桥(DAB)变换器来维持直流侧电压稳定。仿真和实验结果表明,在基于48脉波整流的船舶微电网系统下,所提策略能够使DC-APF在稳态、谐波频率变化以及负载变化时均保持良好的补偿效果,同时其直流侧电压始终保持相对稳定。

In marine microgrid,some direct current sensitive loads have high requirements on ripple.Therefore,a marine micro-grid ripple suppression method based on direct current active power filter(DC-APF)is proposed.Under the marine microgrid system based on the 48-pulse rectifier generator,a DC-APF model suitable for the system is designed.In order to achieve the suppression of high-frequency harmonics and solve the problem of the compensation effect of DC-APF when the system frequency changes,a current tracking method based on adaptive quasi proportional resonance(PR)and proportional integral(PI)composite control is proposed.In order to solve the problem of DC-APF direct currentside voltage stability when the load changes,a dual active bridge(DAB)converter is used to maintain the direct current side voltage stability.Simulation and experiment show that the proposed strategy can make DC-APF maintain a good compensation effect in steady state,harmonic frequency changes and load changes under marine microgrid system based on 48-pulse rectification,and its direct current side voltage has always remained relatively stable.