飞机变频电力系统双向PWM功率变换器

Bidirectional PWM Converter for Aircraft's Variable Frequency Power System

以多电飞机变频电力系统电作动负载功率控制应用为背景,在三相脉宽调制(PWM)整流器基础上,通过下垂控制方法实现直流环功率自动双向流动,较传统的采用电阻耗能方式吸收作动负载回馈功率方式提高了系统的整体效率。针对变换器在有源逆变状态下交流侧电流谐波含量高的问题,采用LCL滤波器对交流侧电流滤波。仿真和样机验证表明该双向邢PWM功率变换器在变频供电时能实现功率双向流动,且谐波含量低。

Based on the application of the dynamic load power control of the multi frequency aircraft power system, The direct current loop power automatic two-way flow is realized by the droop control method based on three-phase pulse width modulation （PWM） rectifier, compared with the traditional way of energy consumption by resistance absorption load feedback power,the overai] efficiency of the system is increased.ln order to solve the problem of high harmonic current in the active inverter,the LCL filter is used to filter the alternative side current.The results of simulation and prototype verificatian show that the bidirectional PWM power converter can realize bidirectional power flow and low harmonic content when the frequency conversion power supply is used.