面向一次调频的镍氢电池系统开发  

Development of high-power Ni-MH battery system for primary frequency modulation

作　　者：吴田 林闽城 海浩 孙海渔 温兆银[4] 马福元 WU Tian;LIN Mincheng;HAI Hao;SUN Haiyu;WEN Zhaoyin;MA Fuyuan(Zhejiang Energy R&D Institute Co.,Ltd.;Key Laboratory of Solar Energy Utilization&Energy Saving Technology of Zhejiang Province,Hangzhou 311121,Zhejiang,China;Ningxia Zaoquan Power Generation Co.,Ltd,Lingwu 750409,Ningxia,China;Shanghai Institute of Ceramics,Chines Academy of Sciences,Shanghai 200050,China)

机构地区：[1]浙江浙能技术研究院有限公司 [2]浙江省太阳能利用及节能技术重点实验室,浙江杭州311121 [3]宁夏枣泉发电有限责任公司,宁夏灵武750409 [4]中国科学院上海硅酸盐研究所,上海200050

出　　处：《储能科学与技术》2022年第7期2213-2221,共9页Energy Storage Science and Technology

基　　金：浙江省能源集团科技项目(ZNKJ2020003,ZNKJ2022096)。

摘　　要：新能源大规模并网降低了电力系统的转动惯量水平和抗扰动能力,削弱了电网的频率稳定性,增加了电网一次调频的难度。面对日益繁重的调频压力,开发一种能够响应电网一次调频的新型储能系统具有重要的意义。本文通过对西北某火电厂660 MW机组的一次调频实际工况分析,提出了镍氢电池储能系统参与一次调频的容量最优设计和控制策略。进一步地,针对目标容量为5 MW/0.5 MWh的储能系统,研制高功率的镍氢电池单体、电池模块以及电池系统,并进行了充放电倍率、循环寿命、一致性、一次调频工况等多项测试。结果表明:镍氢电池单体具有10 C充放的功率特性和浅充浅放条件下48万次的长循环寿命,电池模块以及电池系统具备在大功率测试条件下稳定工作的能力。验证了镍氢电池储能技术在火电一次调频中应用潜力。Large-scale grid integration of renewable energy reduces the level of inertia and anti-disturbance ability of power systems,weakens the frequency stability of the power grid,and increases the difficulty of primary frequency modulation(PFM)of the power grid.Facing the increasing pressure of frequency modulation,an energy storage system that responds to the PFM of the power grid is required.This paper introduces the principles of the nickel-metal hydride(Ni-MH)battery.Then,combined with operational condition data of 660 MW thermal power units participating in PFM in Northwest China,the optimal power/capacity configuration results and coordinated control strategy suitable for an Ni-MH battery energy storage system are proposed.In addition,high-power Ni-MH batteries,modules,and systems are developed for energy storage systems with a target capacity of 5 MW/0.5 MWh.The charge and discharge curves,cycle life,consistency,and PFM conditions of the batteries,modules,and systems were evaluated.Experimental data results demonstrate that the high-power Ni-MH batteries presented in this paper exhibit high charge and discharge rates of 10 C and 480,000cycles under short-time and high-frequency working conditions.The modules and systems work stably under high-power test conditions.The results of this study verify the application potential of Ni-MH battery energy storage technology in the PFM of thermal power.

关 键 词：镍氢电池 储能系统 一次调频 荷电状态 

分 类 号：O646.21[理学—物理化学]