一种新颖的直流系统在线绝缘检测方法  

Novel Measurement Method for On-Line Insulating Detection in DC System

作　　者：陈志强 宋凡峰[2] 刘畅 

机构地区：[1]山东省冶金设计院有限责任公司,山东济南250101 [2]山东水利职业学院,山东日照276826

出　　处：《电工电气》2009年第6期40-42,共3页Electrotechnics Electric

摘　　要：针对现有的直流系统在线绝缘检测方法,分析了其存在的缺点,在此基础上提出了一种新颖的在线绝缘检测方法。该方法采用改进的乒乓式变电桥测量法,实现了直流系统正负极接地电阻的准确在线测量,大大完善了在线检测装置的性能。经现场运行情况表明:在线检测精度高、可靠性高、大大减少了误报警等情况的发生,给故障分析人员提供了极大的方便。Shortcomings were analyzed in allusion to the present on-line insulating detection measurements in DC system, and then a novel insulating detection measurement was proposed. It adopted the ameliorative measurement of ping-pong variable bridge, accomplishing the exact on-line measurement to the insulating resistance in DC system. Experimental tests verified that performance of the designed devices was improved greatly. Site operation results show that on-line measurement is high in accuracy and reliability and greatly reduces false alarming etc situations, so that it is convenient for the personnel to carry out malfunction analysis.

关 键 词：直流系统 绝缘检测 乒乓式变电桥 接地电阻 

分 类 号：TM855[电气工程—高电压与绝缘技术]