大容量电化学储能电站储能评价平台设计

Design of Energy Storage Evaluation Platform for Large-capacity Electrochemical Energy Storage Power Station

在国内贯彻落实“双碳”目标和大规模推广可再生能源的背景下,电化学储能作为提高新能源利用率的重要技术手段,近年来快速发展。但目前尚缺乏完备的大容量电化学储能电站储能效果评价平台。首先剖析了储能电池组和储能变流器模型的运行特性,采用k-means聚类算法提取电化学储能电站的等值参数并建立等值模型。其次,基于现有储能并网运行架构,以四象限变流器为核心,开发了测试大容量储能电站故障电压穿越能力和电网适应性的评价平台,以实现对大容量电化学储能电站的并网检测及运行评价。测试结果显示,提出的储能电站等值模型和大容量电化学储能电站评价平台能够在较短的仿真时间内对电化学储能电站做出较准确的评价。

In the context of implementing“the goal of carbon emission peak and carbon neutrality”and large-scale renewable energy,electrochemical energy storage is an important technical means to improve utilization of renewable energy,and it has developed rapidly in recent years.However,there is currently a lack of a complete evaluation platform for the energy storage effect of large-capacity electrochemical energy storage power stations.Therefore,this paper first analyzes the operating characteristics of the energy storage battery pack and the energy storage converter model,using the k-means clustering algorithm to extract the equivalence parameters of the electrochemical energy storage power station and establish an equivalent model.Secondly,based on the existing energy storage and broadcast architecture,the evaluation platform with four quadrant converters is developed to test the ability of faulty voltage through and grid adaptability for large-capacity energy storage power station,so as to realize grid-connected detection and operation evaluation of large-capacity electrochemical energy storage power stations.The test results show that the energy storage power station equivalent model and the large-capacity electrochemical energy storage power station evaluation platform can make accurate evaluation of electrochemical energy storage power plants within short simulation time.