新型直流系统绝缘在线监测方法  

Novel On-line Insulation Supervising Method for DC System

作　　者：鲍谚[1] 姜久春[1] 张维戈[1] 王嘉悦[1] 温家鹏[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《高电压技术》2011年第2期333-337,共5页High Voltage Engineering

基　　金：铁道部科技研究开发计划(2008J004-F)~~

摘　　要：针对传统直流系统绝缘监测方法的不足,提出了新型直流系统绝缘在线监测方法和检测装置。该方法采用监测主机与绝缘检测装置协调配合的模式,通过通信总线连接构成的监测系统可以同时完成多个直流系统的绝缘监测任务。同时,主机根据预设判据进行实时绝缘故障报警和绝缘故障预警,实现了绝缘监测的远程化、智能化,一定程度上避免了绝缘事故的发生。系统的绝缘电阻检测装置采用新型有源检测方法,通过注入直流电流提高了检测精度,避免了传统直流系统绝缘检测方法的缺陷。最后,通过实验运行验证了方法的有效性和准确性。In accordance with the deficiency of traditional insulation supervising method for DC system,we put forward a novel method for on-line insulation supervising and detecting device,in which the mode that coordinates the supervising host and insulation detecting devices is adopted.The supervising system formed by the host and devices is connected by communication bus,which can accomplish several DC systems＇ insulation supervising task.Meanwhile,the host gives out fault alarm or forecasting alarm according to the pre-established criteria,realizing a remote and intelligent insulation supervising system,avoiding the insulation accident to some degree.The insulation resistance detecting device of this system adopts novel active detecting method which injects DC current to improve the precision,avoiding shortcomings of the traditional method.At last,the validity and veracity are verified by the experiment and operation.

关 键 词：直流系统 绝缘 在线监测 监测系统 有源检测 故障预警 

分 类 号：TM934.3[电气工程—电力电子与电力传动]