故障限流器对带有光伏电源的配电网低电压穿越能力的影响

The Impact of Fault Current Limiter to LVRT of Distributed Network with Photovoltaic Power

本文从理论上分析了故障电流限流器在电网电压跌落时对保护电力电子开关、提高光伏电源低电压穿越的能力的影响,然后在PSCAD/EMTDC中建立了光伏、DC-DC升压转换器和逆变器的小信号模型,并将上述器件并入模拟配电网中仿真。仿真结果表明在电压跌落时故障电流限流器使故障量大小变为对电力电子开关无影响的值,验证了故障电流限流器提高光伏电源低电压穿越能力的有效性。

This paper analyzes the impace of protecting electronic switches and improving the ability of LVRT when fault current limiter connected to distributed network, then set up a solar cell model the DC-DC small signal model, a boost converter and inverter model in the PSCAD/EMTDC, and the above devices incorporated into the model to simulate in PSCAD/EMTDC. The simulation results show that fault current fault current limiter can limiting the size of the the fault current and improving the ability of LVRT.