电动汽车快速充电负荷模型构建方法

Construction Method of Electrical Vehicle Fast Charging Load Model

随着电动汽车大规模的发展,给电网带来了不小的冲击和影响,尤其电动汽车快速充电对电网电压稳定性的影响,准确的负荷模型对研究电压稳定性研究尤其重要。本文分析了电动汽车充电对电网电压稳定性影响。基于快速充电配置建立了电动汽车快速充电的静态负荷模型,通过仿真分析了快速充电器中的整流变换器Rs及Rl对电网电压稳定性的影响。仿真也分析了电动汽车快速充电负载模型与常规的P,Z,I负载模型对电网电压稳定性的影响,结果表明本文所建立的电动汽车负载模型比把电动汽车建立为常规的恒功率、恒流和恒阻抗负载模型有更低的负荷裕度,对电压稳定性影响更高。

Electric vehicle (EV) has been popular in recent years, which bring more challenges to power grids, especially its impact on voltage stability. Accurate EV model is important to the evaluation of voltage stability. This paper analyzed the effect of EV charging on the stability of power grids, developed a static load model for EV based on charging configuration. The impact of Rs and Rl in the rectifier of fast charger , the fast charging load model and normal P, Z, I load model on voltage stability was simulated, the results showed that loading margin with EV load model was more lower than other load models such as P, Z, I.