电池储能电源参与电网一次调频的自适应控制策略  

The Self-Adaption Control Strategy of Energy Storage Batteries Participating in the Primary Frequency Regulation

作　　者：李欣然[1] 崔曦文[1] 黄际元 黎淑娟[1] 孟娅 Li Xinran;Cui Xiwen;Huang Jiyuan;Li Shujuan;Meng Ya(College of Electrical and information Engineering Hunan University,Changsha 410082 China;Grid Hunan Electric Power Limited Corporation Changsha Power Supply Company,Changsha 410015 China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]国网湖南省电力有限公司长沙供电分公司,长沙410015

出　　处：《电工技术学报》2019年第18期3897-3908,共12页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划(2017YFB0903504);国网湖南省电力公司科技项目(5216A1170002)资助

摘　　要：考虑电网频率特性,提出一种基于虚拟惯性和虚拟下垂动态结合的电池储能电源参与 电网一次调频的自适应控制策略。通过分析储能电源虚拟惯性和虚拟下垂两种控制策略对频率特 性的影响,提出一种可随频率偏差值和频率偏差变化率变化而自动调整两种调频模式参与调频的 分配比例系数的模型,此模型可实现这两种控制策略的优势互补,同时可实现两种调频模式的平 滑切换,可有效地避免控制模式直接切换时引起的二次扰动。基于此模型提出电池储能电源参与 电网一次调频的自适应控制策略,结合调频评估指标,确定储能电源的动作深度,进而得出储能 电源的功率和容量配置需求。最后,分别以阶跃扰动工况和连续扰动工况进行验证,并与虚拟下 垂和虚拟惯性直接切换的一次调频控制策略进行对比分析,结果表明所提控制策略能以较小的储 能电源的容量配置来满足调频评估指标要求并达到较好的调频效果,同时可减小传统机组的备用 容量。Considering frequency characteristics in the power system,this paper proposes a self-adaption control strategy for energy storage batteries participating in the primary frequency regulation based on the dynamic combination of virtual inertial control and virtual droop control.By analyzing the influence of the two control strategies on frequency characteristics,a model is proposed,which can adjust the proportions of two control modes automatically when the frequency deviation and the rate of change of frequency change.This model can achieve the complementary advantages of the two control strategies.At the same time,it can realize the smooth switching between the two control strategies,which can effectively avoid the secondary disturbance caused by the direct switching of the two control strategies.Based on this model,a self-adaption control strategy of energy storage batteries participating in the primary frequency regulation is presented.Considering the evaluation indexes of frequency regulation,the parameters of power and capacity of energy storage batteries are obtained by the output of energy storage batteries.Finally,compared with the control strategies of the direct switching between the virtual droop and the virtual inertial,the proposed control strategy is verified by the operation of step disturbance and continuous disturbance.The results show that using the control strategies proposed in this paper can achieve better effect of frequency regulation with a smaller power demand of energy storage batteries,while reducing the reserve capacity of traditional generators.

关 键 词：电池储能电源 调频分配 比例系数 容量配置 

分 类 号：TM732[电气工程—电力系统及自动化]