母差装置电压开放频繁误报警分析及消弧线圈容量设计优化  

Analysis of False Alarm Accidents of Bus Differential Device and Design Optimization of Arc Suppression Coil Capacity

作　　者：李慧 钟泰军 黄吏飞 吴莎 康慨 LI Hui;ZHONG Taijun;HUANG Lifei;WU Sha;KANG Kai(Power China Hubei Electric Engineering Co.,Ltd.,Wuhan 430040,Hubei)

机构地区：[1]湖北省电力勘测设计院有限公司,湖北武汉430040

出　　处：《通信电源技术》2021年第12期87-91,94,共6页Telecom Power Technology

摘　　要：针对某新能源场站正常运行时反复出现35 kV母差保护装置电压开放误报警的情况,通过现场排查、设备校验以及理论分析,最终判定母差保护无故障报警与消弧线圈的设计容量有关。首先,分析了母差保护设备的电压开放、保护动作原理,校验了消弧线圈设备性能;其次,分析了零序电压与消弧线圈补偿特性之间的联系;最后,提出了消弧线圈容量设计的优化方案。In view of the repeated false alarms of 35kV bus differential protection device because of voltage unlock during normal operation of a new energy plant,after on-site investigation,equipment verification,and theoretical analysis,it is finally determined that the false alarm is related to the design capacity of the arc suppression coil.Firstly,analyzed the voltage unlock and protection action principle of the bus differential protection equipment,verified the performance of the arc suppression coil equipment.Secondly,analyzed the relationship between the zero sequence voltage and the compensation characteristics of the arc suppression coil.Finally,in conjunction with engineering experiences,an optimization scheme for the capacity design of the arc suppression coil is proposed.

关 键 词：母线差动保护 零序电压 消弧线圈补偿特性 消弧线圈容量设计 

分 类 号：TM7[电气工程—电力系统及自动化]