400Hz逆变电源并联控制技术研究

Study on Parallel Operation of Single-phase 400 Hz Interver

400 Hz中频电源在各种军用和民用系统中得到广泛应用,针对其输出电压波形难以控制和并联运行存在环流等问题进行了分析和研究。详细分析了两台逆变器参考信号存在相位差时造成逆变器输出电流矢量不相等的原因。采用CPLD实现各逆变器启动基准信号同步,采用DSP实现瞬时无功理论方法控制各逆变器输出的电流瞬时值相等,以确保各逆变器之间无环流。用DSP实现有功功率和无功功率分别调节输出电压的相位与幅值以达到均流的目的。通过理论分析、仿真和实验验证了该方法的可行性,该方法对逆变器并联的工程应用起到一定的指导作用。

The 400 Hz m-frequency power in various military and civilian system has been widely used, the problems that its output voltage waveform is difficult to control and parallel-running exist circulation are analysed and studied. The reasons of the unequal vector of inverter output current caused by the two inverter reference signal existing phase difference are analyzed.Based on this,the paper adopts CPLD to realize the synchronous of benchmark signals when inverter start, and adopts DSP to realize instantaneous reactive theory method algorithm control every inverter output current instantaneous equal to ensure that each inverter between without cireulation.DSP is used to realize active power and reactive power output voltage phase adjust respectively with amplitude in order to achieve the purpose of all ~ow.Through theoretical analysis,simulation and experimental results verify the feasibilily of this method.The method used in this paper plays a guiding role in engineering application of inverter parallel.