一起换流变失步故障处置流程及原因分析  

Process and analysis for a DC converter out of step

作　　者：钟永林 于鹏 李清泉 ZHONG Yonglin;YU Peng;LI Qingquan(State Grid Shandong Electric Extrahigh Company,Jinan 250118,China)

机构地区：[1]国网山东省电力公司超高压公司,济南250118

出　　处：《黑龙江电力》2024年第3期214-218,共5页Heilongjiang Electric Power

摘　　要：介绍一起默拉直流换流变调档失步的故障。现场通过采取紧急处置措施,避免换流变档位的进一步偏差,防止换流变饱和保护或零序电流保护动作。通过对现场调档机构、交流电源检查及二次回路测量,确定事故的直接原因为交流电源监测继电器故障,交流电源切换不成功,导致换流变调档机构丢失交流电源。提出事故的应对措施,快速定位故障,缩短故障处置时间。Taking a fault in a Mertiari-Lahore DC converter out of step as an example.By taking emergency disposal measures on site,further deviations in the shifting gear were avoided and the occurrence of an accident with converter saturation protection or zero sequence current protection was prevented.Through on-site shifting mechanisms,AC power checks and secondary circuit measurements,the direct cause of the accident was eventually determined to be a fault in the AC power monitoring relay,which led to an unsuccessful AC power switch,resulting in the loss of AC power to the converter shifting mechanism.Countermeasures for the accident were proposed to quickly locate the fault and shorten the fault disposal time.

关 键 词：换流变压器 分接开关 失步 

分 类 号：TM406[电气工程—电器]