摘要
利用储能参与互联电网负荷频率控制(load frequency control,LFC)可有效提升电网的频率韧性。然而,受到荷电状态、突发物理故障等因素影响,储能随机接入或退出可能造成LFC系统结构的不确定变化,不利于控制策略的设计。为此,提出基于异步切换的自适应LFC策略。首先,预设了一系列储能参与LFC的场景,针对每个场景,通过构造Lyapunov泛函确定控制参数设计约束。其次,针对储能随机接入/退出行为,基于平均驻留时间技术推导控制参数在任意2个场景间切换时的更新准则。最后,以最小化任意2个运行场景间的平均驻留时间为目标,设计基于和声搜索的LFC参数优化方法,有效提升电网对储能随机接入/退出行为的容忍度。仿真结果表明,与不考虑储能接入/退出的方案相比,所提方法有效降低了储能接入/退出行为对LFC系统动态行为的冲击影响。
Utilizing energy storage systems(ESSs)to participate in load frequency control(LFC)can effectively improve the frequency stability of power systems.However,due to such factors as state of charge or sudden physical failures,the random access or exit of ESSs may cause uncertain changes in LFC structure,which is not conducive to the controller design.In this paper,an asynchronous switched adaptive LFC strategy is proposed.Firstly,a series of possible scenarios for ESSs to participate in LFC were pre-set.For each scenario,the control parameter design constraints were determined by constructing Lyapunov functionals.Secondly,to address the uncertainties of LFC structure caused by random access/exit of ESSs,update criteria for control parameters switching between any two scenarios were derived based on the average dwell time technique.Finally,to minimize the average dwell time between any two operating scenarios,an LFC parameter optimization method based on harmony search was designed to effectively improve the tolerance of the power system for stochastic energy storage access/exit behaviors.Simulation results show that compared with existing control schemes that do not consider the factors of access/exit of ESSs,the proposed method can effectively reduce the impact of ESSs'access/exit on the dynamic behaviors of LFC system.
作者
满林坤
吴珂鸣
迟成
尤金石
赵梓潼
张亚健
MAN Linkun;WU Keming;CHI Cheng;YOU Jinshi;ZHAO Zitong;ZHANG Yajian(Northeast Branch of State Grid Corporation of China,Shenyang 110000,China;State Grid Baishan Power Supply Company,Baishan 134300,China;North China Electric Power University,Baoding 071000,China;Shanghai University,Shanghai 200444,China)
出处
《中国电力》
北大核心
2025年第9期164-174,共11页
Electric Power
基金
国家电网有限公司科技项目(东北电网新型储能参与电力市场机制与运行效果评估推演的关键技术研究,529926240003)。
关键词
互联电网
负荷频率控制
异步切换
储能系统
自适应控制
interconnected power system
load frequency control
asynchronous switch
energy storage system
adaptive control
作者简介
满林坤(1992),男,工程师,从事电力市场、电力系统研究,E-mail:849031168@qq.com;通信作者:张亚健(1991),男,副教授,从事电力系统网络化控制、综合能源系统研究,E-m a i l:zhang_ya_jian@shu.edu.cn。
