A Novel On-line Monitoring System for High Voltage Cable Dielectric Loss Detection

2019 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC) Pub Date : 2019-12-01 DOI:10.1109/APPEEC45492.2019.8994744

Haoming Wang, Yuzhu Chen, Xiaosheng Peng, Hao Zhou, Xiaochuan Shi

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Abstract

Due to the difficulty of leakage current separation and cable core voltage acquisition, the traditional high voltage cable online monitoring system of dielectric loss have low precision and data instability. Therefore, a new online monitoring system for high voltage cable dielectric loss has been proposed, the accuracy of dielectric loss detection is improved, and the safe and stable operation of the cable is guaranteed. First, the principle of the high voltage cable dielectric loss detection system is introduced. Then, the influence of the distance between the cabinet and the cable on the accuracy of the dielectric loss is analyzed, and the method of correcting the distance error by the ranging method is proposed. Different cable transmission modes were analyzed for the effect of the sensor for leakage current separation, and a method of installing simultaneous sampling current monitoring units was proposed. Finally, the influence of different sampling errors on the dielectric loss detection results is analyzed, and a method of ensuring sampling synchronization using a satellite synchronization system is proposed. The high-voltage cable dielectric loss online monitoring system proposed in the paper is also applicable to live detection.

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一种新型高压电缆介质损耗在线监测系统

传统高压电缆介质损耗在线监测系统由于漏电流分离和电缆芯电压采集困难，存在精度低、数据不稳定等问题。为此，提出了一种新型高压电缆介质损耗在线监测系统，提高了介质损耗检测的准确性，保证了电缆的安全稳定运行。首先，介绍了高压电缆介质损耗检测系统的工作原理。然后，分析了机柜与电缆之间的距离对介质损耗测量精度的影响，提出了用测距法修正距离误差的方法。分析了不同电缆传输方式对传感器漏电流分离的影响，提出了安装同步采样电流监测单元的方法。最后，分析了不同采样误差对介质损耗检测结果的影响，提出了利用卫星同步系统保证采样同步的方法。本文提出的高压电缆介质损耗在线监测系统也适用于现场检测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2019 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

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