基于水树枝现象XLPE电缆在线监测系统的研究与设计

Research and Design of On-line Monitoring System of XLPE Cable Based on Water Tree Phenomenon

基于交联聚乙烯(XLPE)电缆水树状老化的原理,直流分量法和交流叠加法是两种有效的XLPE电缆在线监测方法。设计了综合上述两种方法的在线监测系统,其中包括设计方案、系统构成、关键技术等。结果表明:设计的XLPE电缆在线监测系统能够反映运行中电缆绝缘的老化程度,实现了XLPE电缆的在线监测。

Based on the theory of water tree ageing of XLPE cable, the DC component method and AC superposition method are effective methods for on-line monitoring of XLPE cable. An on-line monitoring system of XLPE cable based on the above two methods was designed, which included design plan, system construction, and key technology. The experiment results show that the on-line monitoring system can reflect the ageing degree of the running cable, and realize the on-line monitoring＇ of the cable.