直流能馈型交流PEL的仿真研究

Simulation Study of DC Energy Fed AC PEL

针对逆变电源的带载测试,研究了一种直流能馈型交流电力电子负载(Power Electronic Load,PEL)。该PEL由PWM整流器和移相全桥电路级联组成。首先介绍直流能馈PEL的拓扑结构,接着对负载模拟部分进行建模,在此基础上,建立PCHD模型,通过IDA-PBC控制规律设计无源控制器,能量回馈单元采用双环PI控制,最后搭建PEL的仿真模型,在仿真中验证其性能,该PEL的负载模拟具有稳态误差小、响应速度快、THD小的特性,回馈的电能直接用于逆变电源,能量利用率高。

Aiming at the load test of inverter power supply,a kind of power electronic load(PEL)which is composed of PWM rectifier and phase-shifting full bridge circuit is studied.Firstly,the topology of PEL is introduced,and then the load simulation part is modeled.On this basis,the PCHD model is established.The passive controller is designed by IDA-PBC control law.The double loop PI control is used in the energy feedback unit.Finally,the simulation model of PEL is built to verify its performance in simulation.The load simulation of PEL has small steady-state error,fast response speed and small THD.The feedback power is directly used in the inverter power supply,and the energy utilization rate is high.