考虑SOC的自适应分组策略在储能参与一次调频中的应用  

Adaptive Grouping Strategy of the Battery Energy Storage System Participating in the Primary Frequency Regulation Considering SOC

作　　者：赵熙临[1] 桂玥 付波[1] 张大恒 李品 ZHAO Xilin;GUI Yue;FU Bo;ZHANG Daheng;LI Pin(School of Electrical&Electronic Engineering,Hubei University of Technology,Wuhan 430068,Hubei,China)

机构地区：[1]湖北工业大学电气与电子工程学院,湖北武汉430068

出　　处：《电网与清洁能源》2022年第10期116-125,共10页Power System and Clean Energy

基　　金：国家自然科学基金资助项目(61603127)。

摘　　要：大规模储能电站中各电池组状态的不一致性,使得传统电池参与一次调频研究时的归一化处理难以涵盖所有电池组状态,容易导致部分电池过度充放电。提出了一种考虑电池荷电状态(state of change,SOC)的自适应分组策略,用于储能参与一次调频的应用研究。根据电池的额定容量和SOC对储能电池进行分组,以实时调整各电池组的出力比例;设计评价指标以量化分析电池使用寿命,根据每组电池SOC对其进行综合控制,以实时调整每组电池出力大小,减小电池循环深度,提升其使用寿命。通过Matlab/Simulink进行仿真验证,结果表明,所提分组策略能在保证一次调频性能的同时,有效提升储能电池的使用寿命。Battery energy storage(BES)is used for primary frequency regulation in power systems to compensate the randomness of renewable energy generation because of its advantages of fast response, easy controlling and flexible configuration. The battery energy storage participating in primary frequency regulation in the most studies of control strategy is equivalent to a single battery. Therefore,an adaptive grouping strategy of energy storage system for primary frequency modulation considering the state of charge(SOC)is proposed in this paper. Firstly,battery energy storage is grouped according to the rate capacity and SOC of the battery to adjust the output ratio of the batteries in real time. Secondly, evaluation indicators are designed to analyze the battery life. The comprehensive control is conducted according to each group of battery SOC to adjust the output ratio of each battery,which can reduce the depth and improve the service life of the battery. The simulation results of MATLAB/Simulink show that the proposed grouping strategy can ensure the performance of the primary frequency regulation and effectively improve the lifetime of the energy storage battery.

关 键 词：储能电池 荷电状态 一次调频 自适应分组 综合控制 

分 类 号：TM712[电气工程—电力系统及自动化]