基准电压不一致引起主变过励磁保护误动的原因分析  

Analysis and preventive measures of main transformer overexcitation protection maloperation caused by inconsistent reference voltage

作　　者：关延伟 厉志波 岳啸鸣 Guan Yanwei;Li Zhibo;Yue Xiaoming(Rundian Energy Science and Technology Co.Ltd,Zhengzhou 450002)

机构地区：[1]润电能源科学技术有限公司,郑州450002

出　　处：《电气技术》2020年第12期102-104,109,共4页Electrical Engineering

摘　　要：本文通过对一起主变过励磁保护误动的原因分析认为,保护定值计算采用的基准电压与变压器过励磁能力曲线基准电压不一致是造成主变过励磁保护误动的主要原因,并通过对不同主流保护厂家主变过励磁保护算法的调研,给出了不同保护厂家主变过励磁保护定值整定计算中应注意的问题及防止保护误动的预防措施,为主变过励磁保护定值整定计算和主变过励磁保护安全及其可靠运行提供了有益参考。Based on the analysis of a main transformer overexcitation protection maloperation,the existing problems in the setting calculation of the main transformer overexcitation protection on site are exposed.Through the investigation of the logic of the main transformer overexcitation protection of different mainstream protection manufacturers,the precautions and preventive measures in the setting calculation of the main transformer overexcitation protection of different protection manufacturers are given.For the setting calculation of the overexcitation protection,equipment Safe and reliable operation has certain reference value.

关 键 词：主变过励磁保护 采样偏差 基准电压值 补偿系数 

分 类 号：TM774[电气工程—电力系统及自动化]