光耦误动原因分析及解决办法  

Cause and treatment of optical coupler maloperation

作　　者：宋小欣[1] 彭淑明[1] 戴斌[1] 

机构地区：[1]江西省电力公司超高压分公司,江西南昌330006

出　　处：《江西电力》2008年第6期10-12,共3页Jiangxi Electric Power

摘　　要：电网运行过程中,微机型继电保护装置或电网安全自动装置常常由于光耦回路的设计缺陷,在现场干扰的作用下,发生保护误动的现象。基于此,本文结合一起具体的现场实际事故排查过程,分析出光耦元件误动作的原因大多在于开入光耦动作所需功率太小,一旦遇到变电站干扰,容易导致误动作。从而提出了在保持光耦其他特性不变的前提下,增加动作功率,以提高抗干扰性能的解决办法。In power grid operation, protection maloperation often happened in microcomputer-based protection equipment and power grid stability coutrol equipment because of optical coupler design drawback and spot interference. According to an accident investigation, it is found that small power was required to act optical coupler. Therefore, provided features maintained, increasing power is the way to improve the capability of anti-interference.

关 键 词：继电保护 误动 光耦 开入量 抗干扰 

分 类 号：TM774[电气工程—电力系统及自动化]