全球能源互联网2024，Vol.7Issue(4)：383-392,10.DOI:10.19705/j.cnki.issn2096-5125.2024.04.004
考虑配电网与电化学储能交互耦合关系的异常运行状态预警方法
An Abnormal Operation State Early Warning Method Considering the Interactive Coupling Relationship Between Distribution Networks and Electrochemical Energy Storage
摘要
Abstract
The stability of the distribution network is directly related to the operational quality of energy storage on the end user side.A thermal runaway early warning method for user-side energy storage systems under abnormal operation scenarios in distribution networks is proposed.The method establishes a complete transmission path from the abnormal state of the distribution network to the user-side energy storage and identifies key characteristic quantities of lithium-ion battery thermal runaway,including abnormal current/voltage values and the duration of abnormal states.The study constructs a state evolution model for user-side energy storage to analyze the impact of these characteristic quantities on the safe operation state of the energy storage.Simulation results reveal the specific impact of different abnormal electrical quantity changes on energy storage safety,such as the high positive correlation between abnormal current/voltage values and the abnormal temperature of energy storage,and the strong positive correlation of the duration of abnormal states.Based on this,the study determines the triggering boundary for thermal runaway of user-side energy storage and formulates preventive,control,and response measures for various abnormal operation states,including single-phase grounding,two-phase short circuits,two-phase grounding,and three-phase short circuits.These measures include preparing to disconnect energy storage in case of untimely fault elimination and strengthening line protection construction.The application of this method significantly improves the safety and stability of the distribution network and user-side energy storage systems.关键词
配电网/用户侧储能/锂电池热失控/状态演化模型/热失控预警/安全稳定性Key words
distribution network/user-side energy storage/lithium-ion battery thermal runaway/state evolution model/early warning/safety and stability分类
信息技术与安全科学引用本文复制引用
范培潇,刘学成,杨军,李勇汇,柯学,洪华伟,张抒凌..考虑配电网与电化学储能交互耦合关系的异常运行状态预警方法[J].全球能源互联网,2024,7(4):383-392,10.基金项目
国家电网有限公司科技项目(用户侧储能并网安全监测与故障溯源关键技术研究及应用,5108-202218280A-2-148-XG). Science and Technology Foundation of SGCC(5108-202218280A-2-148-XG). （用户侧储能并网安全监测与故障溯源关键技术研究及应用,5108-202218280A-2-148-XG）
