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电动汽车(Electric Vehicle)作为电网中移动式储能单元,在向电网“索取”电能的同时,也可提供应急电源、调频等V2G(Vehicle to Grid)服务,使电网运行更加安全经济。电动汽车接入系统建模是各种分析计算的基础。本文基于控制逻辑,提出了等效智能充电机的概念;并借鉴其它电力系统储能元件的控制方法,分析了基于代理模式的电动汽车参与调频的控制策略;运用PSASP中用户自定义建模方法建立了电动汽车参与调频服务模型;最后,利用该模型对EPRI 7系统进行了仿真计算。结果表明,该模型能够很好地反映电动汽车系统频率响应特性,并根据频率偏差调整调频功率从而控制系统频率回至额定值的过程。所建模型可用于复杂电网的分析计算。
Electric Vehicle, as a mobile energy storage unit in the power grid, can also provide V2G (Vehicle to Grid) services such as emergency power and frequency control to the grid to “get” electric energy and make the grid operate more safely and economically. Electric vehicle access system modeling is the basis for a variety of analytical calculations. In this paper, based on the control logic, the concept of equivalent smart charger is proposed. Based on the control method of other energy storage components, the control strategy of electric vehicle based on the agent mode is analyzed. By using the user-defined modeling method in PSASP Established a service model of EV participation in FM service. Finally, the model was used to simulate the EPRI 7 system. The results show that this model can well reflect the frequency response characteristics of electric vehicle system, and adjust the FM power according to the frequency deviation to control the system frequency back to the rated value. The model can be used in the analysis of complex power grids.