一起35 kV母线电压不平衡故障的处置  

Handling of 35 kV Bus Voltage Unbalance Fault

作　　者：杜卫仕 王瑞虎 胡松华 DU Weishi;WANG Ruihu;HU Songhua(Baoshan Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Yunnan Baoshan 678000,China)

机构地区：[1]云南电网有限责任公司保山供电局,云南保山678000

出　　处：《农村电气化》2023年第9期80-82,共3页Rural Electrification

摘　　要：2022年6月26日,220 kV某变电站35 kVⅠ组母线发生母线电压不平衡事故。调查显示,变压器低压绕组中性点未接地导致变压器电容不平衡,同时35 kVⅠ母线C相熔断器熔断,导致母线电压不平衡。文章分析了事故原因并总结现场操作和调度处置办法,提出事故预防措施,供运维人员参考。On June 26,2022,a bus voltage unbalance incident occurred in the 35 kV I-phase bus of a certain 220 kV substation.Investigation revealed that the neutral point of the transformer's low-voltage winding was not grounded,resulting in capacitive imbalane in the transformer.Additionally,the C-phase fuse of the 35 kV I-phase bus was blown,leading to bus voltage unbalance.This paper analyzes the issues,summarizes the problems in on-site operations and scheduling,and provides recommendations for reference by operation and maintenance personnel.

关 键 词：母线电压不平衡 变压器 低压绕组 母线 

分 类 号：TM633[电气工程—电力系统及自动化]