基于LECD安全评价方法的磷酸铁锂储能电站的安全运维研究  

RESEARCH ON SAFETY OPERATION AND MAINTENANCE OF LITHIUM IRON PHOSPHATE ENERGY STORAGE POWER STATION BASED ON LECD SAFETY EVALUATION METHOD

作　　者：施朋 谢俊峰 张怡 戚英祥 Shi Peng;Xie Junfeng;Zhang Yi;Qi Yingxiang(China Resources New Energy(Yucheng)Co.,Ltd,Dezhou 251200,China;North China University of Science and Technology,Tangshan 063000,China)

机构地区：[1]华润新能源(禹城)有限公司,德州251200 [2]华北理工大学,唐山063000

出　　处：《太阳能》2024年第12期57-64,共8页Solar Energy

基　　金：国家重点研发计划项目(2021YFE0190900)。

摘　　要：随着新能源技术的不断发展,新能源电源大量投入生产运行,但其发电具有不稳定性与波动性,配套储能系统可以解决此问题,因此储能得到了快速发展,但目前如何保障储能电站安全稳定运行仍是亟待解决的问题。基于风电场配套磷酸铁锂储能电站的运行现状及存在的潜在风险,探讨了此类储能电站的标准化安全运维问题,设计了1套LECD(likelihood,exposure,consequence,danger)安全评价方法来系统性评价磷酸铁锂储能电站运维的安全性;根据LECD安全评价方法得到的分值进行风险等级划分后,基于风险等级较高的安全隐患发生的可能性、可探测性、危害程度3个方面制定了具有针对性的改进措施,从而可最大程度地提高磷酸铁锂储能电站运维的安全性。通过所提出的LECD安全评价方法及改进措施可以做到:1)在可探测性方面,根据所提出的储能安全预诊断系统,通过建立磷酸铁锂储能电站的电池热失控预诊断数据库,提高安全隐患预测的准确率。2)在可能性方面,根据提出的充放电5步法的操作指引,降低磷酸铁锂储能电站产生安全隐患的可能性;对电池能量管理系统(BMS)程序进行升级,改进荷电状态(SOC)参数,一旦SOC超出参数范围则自动停止充放电,并发出警告,从源头上避免风险的产生。3)在危害程度方面,提出了通过高硼硅有机玻璃检测磷酸铁锂电池中电解液泄漏的方法,并在储能单元区域加装了风向测定装置,减少了安全隐患发生时造成的危害,提高了储能电站运行的安全性,并保障了运维人员的人身安全与设备运行的可靠性。With the continuous development of new energy technology,a large number of new energy power sources have been put into production and operation.However,their power generation has instability and volatility,and the supporting energy storage system can solve this problem.Therefore,energy storage has developed rapidly.However,how to ensure the safe and stable operation of energy storage power stations is still an urgent problem to be solved.This paper is based on the current operation status and potential risks of wind farm supporting lithium iron phosphate energy storage power stations,and explores the standardized safety operation and maintenance issues of energy storage power stations.A set of LECD(likelihood,exposure,consequence,danger)safety evaluation methods is designed to systematically evaluate the safety of operation and maintenance of lithium iron phosphate energy storage power stations.After dividing the risk levels based on the scores obtained from the LECD safety evaluation method,targeted improvement measures are developed based on the likelihood,exposure,and consequence of safety hazards with higher risk levels,in order to maximize the safety of the operation and maintenance of lithium iron phosphate energy storage power stations.The proposed LECD safety evaluation method and improvement measures can achieve:1)In terms of detectability,based on the proposed energy storage safety pre diagnosis system,by establishing a battery thermal runaway pre diagnosis database for lithium iron phosphate energy storage power stations,the accuracy of safety hazard prediction can be improved.2)In terms of likelihood,according to the operational guidelines for the proposed 5-step charging and discharging process,the possibility of safety hazards in lithium iron phosphate energy storage power stations can be reduced.Upgrade the BMS system program and improve the SOC parameters,once the SOC exceeds the parameter range,it will automatically stop charging and discharging and issue a warning to avoid risks from the source.

关 键 词：LECD安全评价方法 储能电站 磷酸铁锂电池 预诊断 热失控 荷电状态 安全运维 

分 类 号：TM911.3[电气工程—电力电子与电力传动]