摘要
一次调频是储能电站支撑新型电力系统稳定运行的关键技术。本工作研究了锂离子储能电站一次调频集成设计,包括响应时间和过载能力两方面的分析及优化,主要通过信息采集与传递、策略算法运算周期两方面缩短响应时间,通过储能变流器内部功率器件开关频率控制方案提升其过载能力,并通过20 MW/10 MWh锂电池储能电站实现了上述指标优化验证。结果表明,锂离子储能电站应用于一次调频工况时,变流器响应时间为60~80 ms,变流器过载能力30 s内均能达到150%,提高了储能电站功率性价比。该储能电站在孤网中的一次调频试验中可有效平滑频率波动,减少发电机组的动作频次,可为后续功率型储能电站设计提供思路。
Primary frequency regulation is a key technology for energy storage power stations to support the stable operation of new power systems.In this paper,the integrated design of primary frequency modulation of lithium-ion energy storage power station is studied,including the analysis and optimization of response time and overload capacity.The response time is shortened mainly through information collection and transmission,and the operation cycle of strategy algorithm.The switching frequency control scheme of the power device inside the energy storage converter is proposed to improve its overload capacity,the optimization of the above indicators is verified by the 20 MW/10 MWh lithium battery energy storage power station.The results show that when the lithium-ion energy storage power station is applied to the primary frequency regulation condition,the response time of the converter is 60—80milliseconds,and the overload capacity of the converter can reach 150%within 30 seconds,which improves the power cost performance of the energy storage power station.The energy storage power station can effectively smooth the frequency fluctuation in a frequency regulation test in the isolated network,reduce the operating frequency of the generator set,and provide ideas for the design of the subsequent power energy storage power station.
作者
王立娜
谭丽平
徐志强
谭鑫
吴昌龙
叶晖
李爱魁
WANG Lina;TAN Liping;XU Zhiqiang;TAN Xin;WU Changlong;YE Hui;LI Aikui(Hunan Economic Research Power Design Co.,Ltd.;Economic and Technological Research Institute of State Grid Hunan Electric Power Co.,Ltd.;Hunan Engineering Research Center for Large-scale Battery Energy Storage Application Technology,Changsha 410001,Hunan,China;College of Electrical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)
出处
《储能科学与技术》
CAS
CSCD
北大核心
2022年第12期3862-3871,共10页
Energy Storage Science and Technology
基金
基于主动稳定支撑和经济调度运行的储能电站并网指标体系研究(5216A221000Z)。
关键词
锂离子电池
储能电站
一次调频
集成设计
过载
lithium-ion battery
energy storage power station
primary frequency modulation
integrated design
overload
