Dielectric Response Characteristics and Insulation Condition Evaluation Under Impulse Voltage for Cables

被引：0
|
作者：
Zhao S. [1 ]
Zhou K. [2 ]
He M. [2 ]
Xie M. [2 ]
Zhang F. [2 ]
机构：
[1] Technical Training Center, State Grid Sichuan Electric Power Company, Chengdu
[2] School of Electrical Engineering and Information, Sichuan University, Chengdu
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Cable; Dielectric response; Frequency domain spectroscopy; Impulse voltage; Insulation condition; Water tree;
D O I：
10.13336/j.1003-6520.hve.20190329027
中图分类号：
学科分类号：
摘要：
In accordance with the deficiency of conventional frequency domain spectroscopy (FDS), we proposed a new test method based on the impulse voltage response to evaluate the insulation condition of cables, and discussed the feasibility of impulse dielectric spectroscopy method by analyzing the frequency spectrum of impulse voltage and the polarization characteristics of dielectrics. Moreover, to investigate the dielectric response behaviors under impulse voltage, the cables with different aging conditions were simulated through an electromagnetic transient program (EMTP). Furthermore, the cables with different water-tree length were obtained by a water-tree accelerated experiment, and an impulse voltage platform was set up. According to the experimental results, the short cable sample of different aging time can be discriminated by dissipation factor-frequency spectroscopy under 1 000 Hz, and the partial aging defect in long cable can be diagnosed by imaginary capacitance-frequency spectroscopy. From these results, the dielectric response method under the impulse voltage can effectively discriminate the aging condition of the cables. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1297 / 1304
页数：7
相关论文
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