10 kV透明电缆终端典型缺陷局部放电特征研究
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摘要
为研究电缆终端典型缺陷的局部放电(PD)特征差异,本研究设计了适用于实验室观测的透明电缆终端,并在终端内预制刀痕缺陷及半导体突起两种常见缺陷。首先利用COMSOL有限元软件对刀痕及半导体突起两种缺陷进行建模与电场仿真;然后搭建10 kV透明硅橡胶终端电热老化试验平台以模拟真实工况并加速老化,利用高频电流传感器(HFCT)获取典型缺陷下的局部放电数据,并构造二维放电谱图;最后对不同电缆终端缺陷的PD信号进行对比分析,并结合仿真结果说明刀痕缺陷及半导体突起缺陷的电场分布特征差异。结果表明:采用透明硅橡胶终端可以实现对电缆终端典型缺陷的连续观测;相比刀痕缺陷,半导体突起缺陷内的电场畸变更严重,其绝缘劣化速度更快。
In order to study the partial discharge(PD) characteristics difference of typical defects in cable termination, a transparent cable termination suitable for laboratory observation was designed, and two kinds of typical defects, the cutting defect and the semiconductor protrusion defect, were prefabricated in the termination. Firstly, the cutting defect and semiconductor protrusion defect were modeled and their electric fields were simulated by COMSOL finite element software. Then an electrical-thermal ageing test platform for 10 kV transparent cable termination was set up to simulate the real condition and accelerate ageing, the PD data of the typical defects was extracted by high frequency current transformer(HFCT),and the two-dimensional discharge spectrogram was constructed. Finally, the PD signals of different cable terminal defects were compared, and the difference of electric field distribution characteristics between cutting defect and semiconductor protrusion defect was illustrated with simulation results. The results show that the transparent silicone rubber termination can realize the continuous observation on the defects in cable termination. Compared with the cutting defect, the electric field distortion in the semiconductor protrusion defect is more serious, and its insulation deterioration rate is faster.
In order to study the partial discharge(PD) characteristics difference of typical defects in cable termination, a transparent cable termination suitable for laboratory observation was designed, and two kinds of typical defects, the cutting defect and the semiconductor protrusion defect, were prefabricated in the termination. Firstly, the cutting defect and semiconductor protrusion defect were modeled and their electric fields were simulated by COMSOL finite element software. Then an electrical-thermal ageing test platform for 10 kV transparent cable termination was set up to simulate the real condition and accelerate ageing, the PD data of the typical defects was extracted by high frequency current transformer(HFCT),and the two-dimensional discharge spectrogram was constructed. Finally, the PD signals of different cable terminal defects were compared, and the difference of electric field distribution characteristics between cutting defect and semiconductor protrusion defect was illustrated with simulation results. The results show that the transparent silicone rubber termination can realize the continuous observation on the defects in cable termination. Compared with the cutting defect, the electric field distortion in the semiconductor protrusion defect is more serious, and its insulation deterioration rate is faster.
引文
[1]江日洪.交联聚乙烯电力电缆线路[M].北京:中国电力出版社,2009.
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[4]罗俊华,邱毓昌,杨黎明. 10kV及以上电力电缆运行故障统计分析[J].高电压技术,2003,29(6):14-16.
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[9]万利,周凯,李旭涛,等.以电场特征理解电缆终端气隙的局部放电发展机理[J].高电压技术,2014,40(12):3709-3716.
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[12]罗新,刘海清,胡日亮,等.基于小波包分解的XLPE配电电缆局部放电波形特征识别与提取[J].高压电器,2013,49(11):110-116.
[13]唐炬,龚宁涛,李伟,等.高压交联聚乙烯电缆附件局部放电特性研究[J].重庆大学学报,2009,32(5):528-534.
[14]吴春玲,曾宪灿,陈朝晖,等. 64/110kV交联聚乙烯绝缘电缆硅橡胶干式终端[J].高电压技术,2003,29(11):50-51.
[15]卓金玉.电力电缆终端结构中的应力锥电场数值分析和模拟实验研究[J].电工技术学报,2000,15(2):15-19.
[16]赵智大.高电压技术[M].北京:中国电力出版社,2013.
[17]陈茂荣,杨忠,牛海清.中压电缆缺陷原因及其状态检测技术现状[J].电线电缆,2013,5(15):39-42.
[18]赵学风,蒲路,琚泽立,等. XLPE电力电缆附件局部放电测量与分析[J].电机与控制学报,2016,20(6):94-100.
[19]陆国俊,熊俊,李光茂,等.振荡波电压下XLPE电缆局部放电模式识别研究[J].高压电器,2017,53(2):95-100.
[2]吴科,马春亮,周凯,等. 10kV电缆终端绝缘气隙缺陷的局部放电及缺陷表面烧蚀特征[J].绝缘材料,2015,48(7):38-43.
[3]吴明祥,欧阳本红,李文杰.交联电缆常见故障及原因分析[J].中国电力,2013,46(5):66-70.
[4]罗俊华,邱毓昌,杨黎明. 10kV及以上电力电缆运行故障统计分析[J].高电压技术,2003,29(6):14-16.
[5] BOGGS S, DENSLEY J. Fundamentals of partial discharge in the context of field cable testing[J]. IEEE Electrical Insulation Magazine,2000,16(5):13-18.
[6] NIEMEYER L. A generalized approach to partial discharge modeling[J]. IEEE transactions on Dielectrics and Electrical insulation,1995,2(4):510-528.
[7] BOGGS S, DENSLEY J. Fundamentals of partial discharge in the context of field cable testing[J]. IEEE Electrical Insulation Magazine,2000,16(5):13-18.
[8]张龙,张伟,李锐鹏,等. 10kV电缆终端缺陷仿真与电场分析[J].绝缘材料,2014,47(4):83-88.
[9]万利,周凯,李旭涛,等.以电场特征理解电缆终端气隙的局部放电发展机理[J].高电压技术,2014,40(12):3709-3716.
[10]刘刚,陈志娟. 10kV交联聚乙烯电缆终端主绝缘含空气气隙缺陷试验[J].高电压技术,38(3):678-683.
[11]周凯,李旭涛,黄华勇,等.电缆终端安装刀痕缺陷的局部放电特性分析[J].电力系统保护与控制,2013,41(10):104-109.
[12]罗新,刘海清,胡日亮,等.基于小波包分解的XLPE配电电缆局部放电波形特征识别与提取[J].高压电器,2013,49(11):110-116.
[13]唐炬,龚宁涛,李伟,等.高压交联聚乙烯电缆附件局部放电特性研究[J].重庆大学学报,2009,32(5):528-534.
[14]吴春玲,曾宪灿,陈朝晖,等. 64/110kV交联聚乙烯绝缘电缆硅橡胶干式终端[J].高电压技术,2003,29(11):50-51.
[15]卓金玉.电力电缆终端结构中的应力锥电场数值分析和模拟实验研究[J].电工技术学报,2000,15(2):15-19.
[16]赵智大.高电压技术[M].北京:中国电力出版社,2013.
[17]陈茂荣,杨忠,牛海清.中压电缆缺陷原因及其状态检测技术现状[J].电线电缆,2013,5(15):39-42.
[18]赵学风,蒲路,琚泽立,等. XLPE电力电缆附件局部放电测量与分析[J].电机与控制学报,2016,20(6):94-100.
[19]陆国俊,熊俊,李光茂,等.振荡波电压下XLPE电缆局部放电模式识别研究[J].高压电器,2017,53(2):95-100.