交联聚乙烯中压电缆绝缘性能的检测和分析

doi:10.11930/j.issn.1004-9649.2014.2.73.4

中国电力 ›› 2014, Vol. 47 ›› Issue (2): 73-77.DOI: 10.11930/j.issn.1004-9649.2014.2.73.4

交联聚乙烯中压电缆绝缘性能的检测和分析

黄昊, 雷勇, 颜嘉俊, 李陈

四川大学电气信息学院,四川成都 610065

收稿日期:2013-09-28 出版日期:2014-02-28 发布日期:2015-12-18
作者简介:黄昊（1989-）,男,湖北武汉人,硕士研究生,从事电缆绝缘性能监测研究。E-mail: 942631257@qq.com

Insulation Detection and Analysis of XLPE Medium-Voltage Cables

HUANG Hao, LEI Yong, YAN Jia-jun, LI Chen

School of Electrical and Information Engineering, Sichuan University, Chengdu 610065, China

Received:2013-09-28 Online:2014-02-28 Published:2015-12-18

摘要/Abstract

摘要： 由于去极化电流的高频成分特性与被测电缆的长度相关,当标准新电缆长度与老化电缆长度相差较大时,会影响对电缆老化状况的判定。通过极化-去极化电流法对中压电缆的绝缘状况进行检测,并对检测数据进行分析。尝试使用对电缆长度相对不敏感的去极化电流低频成分来克服电缆长度带来的影响,然后对电缆绝缘状态进行分析。通过分析去极化电流低频成分的幅值范围、平均放电速率及其受到不同极化时间的影响来判定电缆的绝缘老化状况。最后将该分析用于已修复电缆,可以发现已修复电缆特性接近于相同长度的新电缆,说明该分析确实可以实现鉴定电缆老化状况的功能。

关键词: 交联聚乙烯, 中压电缆, 绝缘性能检测, 极化-去极化（PDC）方法

Abstract: The high frequency component characteristics of depolarization current is associated with the length of the tested cables, so large difference between the standard cable length and the aged cable length will affect the judgment of cable’s aging status. The polarization- depolarization current (PDC) method is used to detect the insulation status of medium-voltage cables and the testing data are analyzed. The low frequency component of depolarization current, which is relatively less sensitive to the cable length, is used to overcome the impact of cable length. Cable aging status is determined through analyzing the value range of the depolarization current’s low frequency components, the average discharge rate and the impact of different polarization time. Finally, this method is applied in repaired cables and it is verified that the characteristics of the repaired cable is close to that of new cable with same length, which shows that the method can be used for identification of the cable’s aging status.

Key words: XLPE, medium-voltage cable, insulation detection, polarization and depolarization (PDC) method

中图分类号:

TM855

黄昊, 雷勇, 颜嘉俊, 李陈. 交联聚乙烯中压电缆绝缘性能的检测和分析[J]. 中国电力, 2014, 47(2): 73-77.

HUANG Hao, LEI Yong, YAN Jia-jun, LI Chen. Insulation Detection and Analysis of XLPE Medium-Voltage Cables[J]. Electric Power, 2014, 47(2): 73-77.

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交联聚乙烯中压电缆绝缘性能的检测和分析

Insulation Detection and Analysis of XLPE Medium-Voltage Cables

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交联聚乙烯中压电缆绝缘性能的检测和分析

Insulation Detection and Analysis of XLPE Medium-Voltage Cables

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