雷击导致西门子7UM622保护装置差动保护误动原因分析

Analysis of the Cause of the Differential Protection Malfunction of Siemens 7UM622 Protection Device Caused by Lightning Strike

摘要

进口国际品牌的微机保护为了适应多种系统运行方式，一般对装置的参数都采取开源的方式进行设置，大多数继保工作人员对电量计算的整定值比较重视，而对保护装置配置的系统运行方式可能会忽略，本文通过对深圳某电厂忽略设备系统方式设置导致西门子7UM622保护装置差动保护误动的实例，对西门子保护的参数设置要点进行详细的分析,提出了国际品牌微机保护整定值应增加系统运行方式的设置，可以推广至进口品牌的微机保护参考应用。

Abstract

To accommodate diverse system operating modes, imported international brand microcomputer protection systems typically adopt open-source parameter configuration. While most relay protection engineers prioritize setting power calculation values, they often overlook system operating mode configurations. This paper analyzes a case where differential protection malfunction occurred in a Siemens 7UM622 device at a Shenzhen power plant due to improper system mode settings in its shunt equipment. The study provides a detailed analysis of key parameter configuration principles for Siemens protection systems, proposing that imported microcomputer protection should incorporate expanded system operating mode configurations. This recommendation can serve as a reference for the application of imported microcomputer protection systems.

关键词

继电保护整定 / 西门子7UM622保护 / 差动保护 / 雷击 / 中性点

Key words

relay protection setting / Siemens 7UM622 protection / differential protection / lightning strike / neutral point

参考文献

[1] Q/CSG110034-2012 《中国南方电网大型发电机变压器继电保护整定计算规程》南方电网企业标准,2012年5月发布.P28-30

[2] 西门子用户功能手册《SIPROTEC 4 7UM6X多功能电机保护装置用户功能手册》P70-78

[3] 南瑞继保《PCS-985BT电厂变压器保护装置说明书》P1-9页

[4] 国电南自《DGT801U系列数字式发电机变压器保护装置技术说明书》P1-2页