一种适用于飞机电网的新型三相四线制有源滤波器

A Novel Three-Phase Four-Wire Active Power Filter Applicable to Aircraft Power System

随着飞机多电化进程的发展,各种机载用电设备的广泛使用,给飞机供电系统带来了较大的谐波压力。传统的三相四线制有源电力滤波器(APF)的主电路拓扑内在可靠性不高,用于飞机电网中有一定的局限性,为此提出了一种高可靠性的分裂桥臂-分裂电容式APF拓扑。文中建立了新型APF的开关模型,分析了新型APF的工作原理,研究并给出了一种优化的SPWM电流控制策略,最后搭建了仿真和实验平台。仿真和实验结果表明,经过新型APF补偿后,飞机电网的电压畸变率和电流畸变率分别在5%和8%以下,符合相关标准的要求。

With the development of the more electric aircraft, number of the airborne electric equipment gets increased. It brings the aircraft electric power system large harmonic pressure which will be harmful to the flight safety. The inherent reliability of the conventional three-phase four-wire active power filter(APF) is not high so that it has limitations in aircraft applications. A novel APF with high reliability is proposed to solve this problem. The switching model of the novel APF is established to indicate the relationship between the novel APF and the conventional one. The operation principle and the current control strategy of the novel APF are studied. Furthermore, the simulation model and experimental platform are built and tested to verify the feasibility of the proposed APF. The results show that, after novel APF's compensation, the voltage and current distortion rates of the aircraft grid are below 5% and 8% separately and both of them meet the relevant standards.