电动汽车对低压变压器的影响分析

The Analysis on the Effects of Electric Vehicle on Low Voltage Transformer

指出随着国家在推动电动汽车(EV)及其充电站的过程中充电技术的创新发展,EV在充电时会产生较大的冲击负荷,这样会影响到站端低压变压器的稳定运行。对电动汽车接入状态进行仿真,分析了充电过程中产生的低压变压器损耗以及变压器两侧电压的波动情况。结果表明电动汽车的接入量对变压器的损耗值、低压侧的电压有着不同的影响;充电时间以及充电机到变压器的距离影响着变压器高压侧的电压变化。

Vigorous development of electric vehicles and their charging stations will have a greater impact on the stable operation of low-voltage transformer. By simulating the status of electric vehicle being accessed to station,the transformer losses in the process of charging and the fluctuations of both sides voltage are analysed. The results show that different amount of vehicles accessed has different impacts on transfomer loss and the voltage at low voltage side;and different charging time and the distance between the transformer and charging machine affect voltage variation of the high-voltage side of the transformer.