电池储能参与电网一次调频的自适应综合控制策略研究Study on Self-adaptation Comprehensive Strategy of Battery Energy Storage in Primary Frequency Regulation of Power Grid
吴启帆;宋新立;张静冉;禹海峰;黄家栋;戴汉扬;罗华伟;
摘要(Abstract):
为充分发挥储能参与一次调频的优势,在虚拟惯性控制及下垂控制的基础上,通过分析储能参与电网一次调频的动态特性,提出一种跟随荷电状态(state of charge,SOC)变化和最大频率偏差动态调整出力的自适应综合控制策略。该策略在负荷扰动初期采用正虚拟惯性控制模拟发电机惯性响应;在频率恢复期提出可变系数的负虚拟惯性控制,综合考虑频率恶化程度(最大频差)和SOC动态调整负虚拟惯性控制出力以加快频率恢复;在整个调频期内采用基于双曲正切函数特性的变系数下垂控制,下垂系数的大小与SOC有关,可在保证调频需求的同时兼顾电池容量的保持效果。最终形成以正/负虚拟惯性控制改善储能调频动态特性为主、下垂控制改善储能稳态特性为主,3种方法互相配合的综合控制策略,并提出电池储能参与一次调频的评价指标。最后在Matlab\Simulink中搭建了区域调频模型,分别对阶跃负荷扰动和连续负荷扰动进行仿真,验证了策略的有效性。
关键词(KeyWords): 电池储能;一次调频;自适应控制;虚拟惯性控制;下垂控制;荷电状态
基金项目(Foundation):
作者(Author): 吴启帆;宋新立;张静冉;禹海峰;黄家栋;戴汉扬;罗华伟;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.1214
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