变电站蓄电池开路故障定位及集中式续流方法  

Open-circuit fault localization and centralized freewheeling methods for the substation storage battery

作　　者：谢翔杰 魏桃胜 贺星煚 甘洪丽 许晓艳 XIE Xiangjie;WEI Taosheng;HE Xingjiong;GAN Hongli;XU Xiaoyan(State Grid Chongqing Electric Power Company Shibei Power Supply Branch,Chongqing 401147;State Grid Chongqing Electric Power Company Skill Training Center,Chongqing 401329)

机构地区：[1]国网重庆市电力公司市北供电分公司,重庆401147 [2]国网重庆市电力公司技能培训中心,重庆401329

出　　处：《电气技术》2024年第3期63-67,73,共6页Electrical Engineering

摘　　要：变电站蓄电池开路将严重威胁电网运行稳定性,现有开路续流装置通常分散布置于每节蓄电池,成本、控制难度、可靠性等问题突出。鉴于此,本文提出一种简易、可靠的变电站蓄电池开路故障定位及集中式续流方法。首先,比较蓄电池及直流负载电流,确定蓄电池充放电状态。然后,在非人为放电状态下,基于蓄电池电压及内阻,检测并定位开路的蓄电池。最后,利用集中式续流装置驱动二极管至开路的蓄电池,完成精准、可靠续流。仿真及实验结果验证了所提方法的有效性。The open-circuit fault of substation storage battery critically challenges the steady operation of power grid.Traditional freewheeling device,however,is installed individually on each battery,resulting in cost,control,reliability problems.Thus,simple and reliable open-circuit fault localization and centralized freewheeling methods are proposed in this paper.First,by comparing the currents of battery and DC load,charge and discharge states can be determined.Then,in the state of non-artificial discharge,faulty battery can be detected and localized with the voltage and internal resistance.Finally,the centralized freewheeling device drive a diode to the faulty battery,achieving accurate and reliable freewheeling.Simulation and experimental results demonstrate the validity of the proposed methods.

关 键 词：蓄电池 开路检测 故障定位 集中式续流 

分 类 号：TM912[电气工程—电力电子与电力传动] TM63