一起电压并列异常导致主变保护告警的故障分析  

Fault Analysis of Main Transformer Protection Alarm Caused by Voltage Parallel Anomaly

作　　者：伍惠铖 李健 唐仁良 钟鈜州 刘星 WU Huicheng;LI Jian;TANG Renliang;ZHONG Hongzhou;LIU Xing(State Grid Yichun Power Supply Company,Yichun,Jiangxi 336000,China)

机构地区：[1]国网宜春供电公司,江西宜春336000

出　　处：《东北电力技术》2024年第9期36-40,共5页Northeast Electric Power Technology

基　　金：国家电网有限公司科技项目(5218M0220001)。

摘　　要：电压并列装置在变电站一次主接线为桥形接线、单母分段或双母线接线等含有母联断路器的接线方式中应用广泛。两段母线的二次电压可以通过电压并列装置进行并列,以使继电保护、测量、计量等装置在本段母线电压互感器退出运行而母联断路器投入的情况下,可以从另一段母线的电压互感器二次绕组获得电压,对变电站的安全、可靠运行具有重要意义。针对220 kV变电站110 kV母线电压并列异常导致主变压器保护告警事件,结合电压并列原理和逻辑,详细阐述了该故障发生后完整的故障处理思路和过程,为现场变电二次检修人员处理电压并列异常提供一定参考。The voltage parallel device is widely used in the transformer substation with the primary main connection being bridge connection,single busbar or double busbar and other wiring modes containing busbar circuit breaker.The secondary voltages of the two busbars can be parallel through the voltage parallel device,so that the relay protection,measurement and metering devices can obtain the secondary voltage from the voltage transformer of the other busbar when the voltage transformer of this busbar is out of operation and the busbar circuit breaker is put in,which has important significance for the safe and reliable operation of the substation.Aiming at the main transformer protection alarm caused by 110 kV bus voltage parallel anomaly in 220 kV substation,combined with the principle and logic of voltage parallel,the complete fault treatment idea and process are elaborated in detail after the fault occurs,which can provide reference for the secondary maintenance personnel to deal with voltage parallel anomalies.

关 键 词：变电站 电压并列 主变保护 合并单元 

分 类 号：TM63[电气工程—电力系统及自动化]