通过电动汽车换电站提高电力系统暂态稳定性的研究

Improving power system transient stability by battery swapping station

针对电动汽车换电站大规模接入电网可能将对系统的优化运行产生较大影响的问题,提出了一种换电站的暂态数学模型,就换电站对电力系统暂态稳定的影响进行了研究。考虑简单的模型,分析了通过控制换电站和电网之间的交换功率提高系统的暂态稳定;然后借鉴电力系统储能元件控制方法,利用电力系统综合分析软件(PSASP)的用户自定义模型UD,对换电站的功率交换进行了建模。以新英格兰系统为例进行了仿真计算。研究结果表明,该模型验证了换电站在改善电力系统暂态稳定性方面的效果;同时不同接入位置的仿真结果对换电站的选址也有一定的指导意义。

Aiming at the problems of extensive impacts brought by large-scale integration of battery swapping station （BSS）into power system on power system operation,a transient model of BSS was proposed to study on its impact on power system transient stability.The simple model was considered and through the theory analysis,it was drawn the conclusion that power system transient stability can be improved by controlling the output of BSS.Then by referencing to the methods used in controlling other power system energy storage components,a power exchange model on BSS was built by user-defined modules in power system analysis software package（PSASP）.Simulations and calculations were carried out with the New England system as an example.The results indicate that the effect of BSS in improving power system transient stability is verified through the model,and the comparative analysis on the effects of BSS installed in different sites which is available for reference is given.