考虑火电时滞特性的电池储能集群调频综合控制策略研究  

Research on Integrated Control Strategy of Battery Energy Storage Cluster for Frequency Regulation Considering Thermal Power Time Lag Characteristic

作　　者：肖家杰 李培强[1] 毛志宇 涂春鸣[1] Xiao Jiajie;Li Peiqiang;Mao Zhiyu;Tu Chunming(College of Electrical and Information Engineering Hunan University,Changsha 410082 China;CSG Electric Power Research Institute,Guangzhou 510663 China)

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]南方电网科学研究院,广州510663

出　　处：《电工技术学报》2025年第3期689-704,共16页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52377097);国家重点基础研究发展计划(973计划)(2023YFB2407605)资助项目。

摘　　要：该文提出一种电池储能集群参与电网调频的综合控制策略,能实现较好的频率控制效果和电池储能集群的安全经济运行。首先,针对火电机组响应时滞特性导致的调频精度低,甚至在负荷快速变化下反向错误调节的问题,提出基于全通滤波的电池储能-火电机组联合调频控制模型,并结合实际负荷扰动数据的频谱分析进一步提出模型参数设计方法,使电池储能作为相移器控制负荷扰动相位与火电机组出力基本一致,有效地改善了调频效果。然后,提出基于调频周期内功率权重动态修正与储能单元依次投入的荷电状态(SOC)一致性控制策略,解决了SOC差异较小时一致性迭代方向与调频功率响应方向相反的问题,兼顾SOC一致性维持和功率响应,并减小了储能单元频繁投切对其使用寿命的影响;同时考虑调频过程电池储能需频繁充放电状态切换,采用储能集群分组控制模式以减小储能集群寿命损耗,提高储能调频经济性。最后,搭建某区域电网仿真模型验证该文控制策略的有效性。To achieve the strategic goal of “carbon peak,carbon neutrality”,the renewable with random output fluctuation is connected to power grid on a large scale in recent years,which brings challenges to the frequency stability of power grid.The energy storage technology is rapidly development,and providing technical support for the frequency regulation capability improving of power grid.The energy storage has rapid response and high precision and is not affected by region and season compared with traditional frequency regulation,.Therefore,the energy storage is gradually becoming research hot spot,which as an auxiliary resource to participate in frequency regulation.At present,the energy storage is mainly applied to assist thermal power units to participate in primary and secondary frequency regulation.However,the existed researches focuses on the distribution of frequency regulation signals between battery energy storage and thermal power units to optimize the output of both,which is not to considering the output lag of thermal power units,and the wrong action of reverse regulation in the case of rapid load disturbance,so that the frequency regulation accuracy is insufficient.In addition,the energy storage system is composed of multiple energy storage units.the power distribution among the units should be researched to improve the safety and economy of the energy storage system operation.However,the state of charge(SOC) consistency,and SOC consistency control economy of energy storage is not effectively take into account at the existed researches To overcome the above shortcomings,a comprehensive control strategy of battery energy storage cluster for frequency modulation is proposed.Firstly,the frequency modulation mechanism and the output lag of thermal power units is analyzed,which causing the lack of frequency modulation accuracy.and a novel idea and control model for frequency regulation between battery energy storage system and thermal power units based on all-pass filter is proposed,and a parameter design me

关 键 词：时滞特性 火储调频 全通滤波 电池寿命 SOC一致性 

分 类 号：TM621[电气工程—电力系统及自动化]