期刊论文

Research on Online Monitoring for HV Cable Based on Differential Current Analysis

中文

高压电器

1001-1609

2019

55

7

165-172

10.13296/j.1001-1609.hva.2019.07.024

______________________________ 收稿日期：2018⁃11⁃18； 修回日期：2019⁃01⁃10 基金项目：国家自然科学基金资助项目(51307009)；湖南省自然科学衡阳联合基金(2018JJ4025)。 Project Supported by National Natural Science Foundation of China(51307009)，Hunan Natural Science (2018JJ4025).

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针对当前高压电缆故障单一参数监测判断准确度低,多参数监测存在数据融合分析不足等问题,提出一种基于差值电流分析的高压电缆故障在线监测方法。该方法通过测量直接接地箱和交叉互联接地箱处接地线电流,对故障及正常情况下接地线三相电流进行比值分析和不平衡度分析来识别故障,根据模糊控制原理建立了故障判别依据和相关数据库,以此进行故障诊断。分析了故障情况下接地箱电流变化情况并仿真模拟了不同位置的接地箱进水、同轴电缆破损、接头开路、接头短路等故障。最后以此设计出一套高压电缆线路故障在线监测系统。通过实例分析验证了该方法的可行性,能及时预警高压电缆线路故障,防止高压电缆线...

Since single-parameter monitoring of power cable sheath fault cannot be evaluated fault accurately and multi-parameter fault monitoring is not enough for data fusion analysis, an on-line cable faults method based on differential current analysis is proposed to precautions for early failures of high-voltage cable lines. This method measures grounding current at the direct grounding box and the cross-connected grounding box and calculate the fault and normal conditions of the grounding wire three-phase current for ratio analysis and unbalance to ...