摘要
分析了一起电厂引风机在启动过程中差动保护动作事故，根据电动机电源侧及中性点侧电流相量及现场的实际情况，排除电流互感器饱和引起二次电流畸变造成差动保护误动，并指出电动机一次电缆相序排列错误是导致这次事故的直接原因。分析了HN--2041D微机电动机保护装置在此次事故中的动作情况。
The paper analyzes a differential protection operation fault during the start period in the induced draft fan in the power plant. According to the motor power supply side and current vector in the neutral point side and the field practical situation, it can be eliminated that the differential protection fault mal - operation caused by the second order current distortion brought about by the current transformer saturation. The paper presents the arrangement fault of the motor first order cable phase sequence is the direct cause to the accident and analyzes the operation situation of the HN -2041D microcomputer motor protection devices in this accident.
出处
《贵州电力技术》
2012年第3期36-37,共2页
Guizhou Electric Power Technology
关键词
电流互感器
饱和
差动保护
误动作
相序错误
Current transformer
saturation
differential protection
mal- operation
phase sequence error
作者简介
作者简介：林立平（1975-），男，大专，助理工程师，现从事继电保护工作。
