[1]项恩新,周婉亚,王 科,等.高压电缆中间接头外半导电层缺陷放电研究[J].高压电器,2020,56(03):135-140.[doi:10.13296/j.1001-1609.hva.2020.03.020]
 XIANG Enxin,ZHOU Wanya,WANG Ke,et al.Discharge in High Voltage Cable Joint with Defect on Outer Semi-conductive Layer[J].High Voltage Apparatus,2020,56(03):135-140.[doi:10.13296/j.1001-1609.hva.2020.03.020]
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高压电缆中间接头外半导电层缺陷放电研究()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年03期
页码:
135-140
栏目:
研究与分析
出版日期:
2020-03-15

文章信息/Info

Title:
Discharge in High Voltage Cable Joint with Defect on Outer Semi-conductive Layer
作者:
项恩新1 周婉亚2 王 科1 王 鹏2 马 仪1 杨 能2周 群2 雷 勇2
(1. 云南电网有限责任公司电力科学研究院, 昆明 650106; 2. 四川大学电气信息学院, 成都 610065)
Author(s):
XIANG Enxin1 ZHOU Wanya2 WANG Ke1 WANG Peng2 MA Yi1 YANG Neng2ZHOU Qun2 LEI Yong2
(1. Yunnan Electric Power Research Institute, Yunnan Power Co., Ltd., Kunming 650106, China; 2. College of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China)
关键词:
高压电缆接头 外半导电层 贯穿性缺陷 局部放电
Keywords:
high-voltage cable joints outer semi-conductive layer perforative defect partial discharge
DOI:
10.13296/j.1001-1609.hva.2020.03.020
摘要:
为研究高压电缆中间接头在外半导电层被划伤后的放电行为,采用脉冲电流法与高频电流耦合法以及硬件实时放电谱图采集,提取外半导电层含有贯穿性缺陷的高压电缆预制式中间接头中的局部放电信号,结合电场仿真以及接头放电模型对放电发展机理进行分析,结果表明:高频电流耦合传感器的灵敏度以及信噪比不及脉冲电流法,不易发现贯穿性缺陷激发的放电信号;外半导电层存在贯穿性缺陷的情况下,一旦线路中由于操作过电压或故障引起的过电压激发接头缺陷内发生放电,放电将迅速向增强绝缘层内部发展,最终形成贯穿性放电通道导致增强绝缘失效,因此实际生产安装过程中应注意防护此类缺陷,确保接头安全运行。
Abstract:
By using pulse current method, high frequency current transformer(HFCT) and hard ware real time data acquisition technologies, partial discharge induced by perforative defect in outer semi-conductive layer of prefabricated cable joint was detected, and the discharge mechanism was investigated in the respect of electric field distribution and the discharge model to acknowledge the discharge characteristics of cable joint with scratch on the outer semi-conductive layer. The results show that the sensitivity and signal to noise ratio of the high frequency current coupling method is lower than that of the pulse current method, thus HFCT would miss the discharge signal induced by the perforative defect. The switching and fault overvoltage may induce discharge in the defect of cable joint with scratch on the outer semi-conductive layer and the discharge will rapidly expand to the reinforced insulation and finally lead to the occurrence of a perforative discharge channel in reinforced insulation. Therefore, this kind of defect should be carefully prevented in the period of manufacture and installation to ensure safe operation of cable joint.

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备注/Memo

备注/Memo:
收稿日期:2019-11-25; 修回日期:2020-01-27 基金项目:国家自然科学基金青年基金资助项目(51407121)。 Project Supported by National Natural Science Foundation of China(51407121).项恩新(1968—),男,工程师,主要从事输配电电缆检测技术研究。 周婉亚(1994—),女,硕士研究生,主要从事电力电子装备中的绝缘系统性能评估研究(通讯作者)。
更新日期/Last Update: 2020-03-15