换流变压器充电时开关跳闸的原因分析  

Malfunction Analysis of Switch Trip during Converter Transformer Charging

作　　者：谷永刚 齐卫东 韩彦华[2] 徐靖东[2] 

机构地区：[1]陕西省电力公司,陕西西安710048 [2]陕西电力科学研究院,陕西西安710054

出　　处：《陕西电力》2011年第9期52-54,共3页Shanxi Electric Power

摘　　要：对A换流站500kV换流变压器充电时,零序过流保护误动导致开关跳闸的原因进行分析。根据故障电流特征及现场实际情况,得出本次故障的原因是由于预防性试验造成换流变压器三相剩磁发生改变,导致励磁涌流较通常状态表现出新的特征,最终造成零序过流保护误动,并提出了防范此类故障的可行性措施。This paper analyzes the cause of zero-sequence over-current malfunction which led to the switch trip during the converter transformer charging. According to the fault current characteristics and field situation, the cause is obtained that the preventive test made remanence of the three phase converter transformer changed, which resulted in inrush current showing the new features. Thus feasible measures to prevent such failures have been proposed.

关 键 词：换流变压器 励磁涌流 零序过流保护 

分 类 号：TM743[电气工程—电力系统及自动化]