Battery energy storage technology can improve the transient response of the power grid, and increase the ability to resist disturbance, which has attracted much attention. However, the traditional simulation software lacks accurate battery energy storage system component model, which affects the accuracy of analysis of energy storage system response characteristics to some extent. In this paper, an electromechanical transient model of battery energy storage system without time delay is presented, which takes into account the limitation of battery charge/discharge power and charge/discharge cycles. The model is composed of three parts, active/reactive power decoupling control, the model interfaces, and the system limitation. Based on the node current injection method, the control model is built using the comprehensive program of power system analysis. The EPRI-7 standard system is selected for simulation verification. The simulation results show that the model has good embeddedness, and its output characteristics are consistent with the theoretical analysis under given working conditions.%电池储能技术可用于改善电网暂态响应,提高电网抗扰动能力,受到广泛关注.但传统仿真软件缺少准确的电池储能系统组件模型,一定程度上影响了分析储能系统响应特性的准确度.提出一种计及电池充放电功率及充放电次数限制的无时延电池储能系统机电暂态模型.该模型由有功/无功解耦控制部分、模型接口部分以及储能系统限制环节三部分组成.利用电力系统分析综合程序,基于节点电流注入法对控制模型进行搭建,并选取 EPRI-7标准系统进行仿真分析,仿真结果表明该模型具有良好的植入性,并且在给定工况下具有与理论分析一致的出力特性.
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