提高数字接口设备抗干扰性能的措施  

Intelligent protection simulation system for local power network

作　　者：曹更新[1] 王芊[1] 余荣云[2] 陈志锋[1] 邹志杨[1] 

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211100 [2]江苏省电力公司,江苏南京210024

出　　处：《电力自动化设备》2007年第4期124-126,共3页Electric Power Automation Equipment

摘　　要：继电保护要求数字接口设备在有故障、受干扰时数据传输不出现任何误码。针对可能存在的电磁干扰采取了有效的抗干扰措施。改进了机箱结构,提高机箱的屏蔽性能;使用了屏蔽性能更好的通信电缆;改进了通信电缆的接地方式;给通信电缆加套磁环;改变电缆和机箱之间的接口方式,在接口处安装滤波器,减小通信电缆上耦合的干扰对数字接口设备造成的影响。结果表明,在国家标准所规定的最高等级的电磁干扰下,继电保护装置中用于监视通道状态的相应计数器没有变化,数字接口设备工作正常。The protective relays require error- free data communication of digital interface devices under conditions of faults or disturbances. Considering the possible existing electro magnetic interference,effective anti-jamming measures are taken. The case structure is improved to enhance its shield performance;the cable with better shield performance is used;the grounding mode is improved; the communication cable is equipped with magnetic ring;the interface mode between cable and case is improved and effective filter is used at the connector to prevent external interference. EMI（Electro -Magnetic Interference） tests at the highest severity level according to national standards verify that, the counters specially designed in relays to monitor the communication states of digital channel have no error found,showing that the digital interface device runs properly.

关 键 词：继电保护 数字接口设备 电磁兼容性 电快速瞬变 

分 类 号：TM774[电气工程—电力系统及自动化]