高电压技术2009，Vol.35Issue(3)：533-538,6.
电缆外护套环流分布在线监测系统的研制
Distributed On-line Monitoring System for Sheath Circulating Current of Cross-linked Power Cables
摘要
Abstract
The value of metal sheath's circulating current of cross-linked power cables is very small in ideal condition, but the value is not so small that the circulating current can't be ignored because of various factors in actual running condition. The circulating current method can judge whether the multipoint earthing fault happens by monitoring the variety of metal sheath's circulating current value. This article introduces an on-line monitoring system which uses the circulating current method to monitor the muhipoint earthing fault of the metal sheath. In the hardware layer, we use distributed current sensors and microcontroller's acquisition units to complete the signal acquisition and signal conditioning of the circulating current value. After the distributed acquisition and conditioning, the signals, through the RS485 bus, will be sent to the Ethernet Serial Device Server network system and then connected to the console cabinet. The computer of the console cabinet could read the circulating current value on-line by the Real Corn Mode of the Ethernet Serial Device Server. This distributed on-line monitoring system has a simple structure, excellent real-time performance and high reliability proved by the practical operation.关键词
cross-linked/power cable/distributed system/circulating current/on-line monitoring/XLPEKey words
cross-linked/power cable/distributed system/circulating current/on-line monitoring/XLPE分类
信息技术与安全科学引用本文复制引用
孟永鹏,彭发东,闫力..电缆外护套环流分布在线监测系统的研制[J].高电压技术,2009,35(3):533-538,6.基金项目
Project Supported by National High Technology Research and Development Program of China-863 Program (2007AAO4Z412). （2007AAO4Z412）
