| 高压XLPE电力电缆缓冲层放电问题分析 |
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| 作者姓名： | 李陈莹 李鸿泽 陈杰 胡丽斌 谭笑 曹京荥 |
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| 作者单位： | 国网江苏省电力有限公司电力科学研究院;国网江苏省电力有限公司; |
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| 基金项目： | 国家自然科学基金资助项目(51377089);国家电网有限公司科技项目"重要电缆通道新型可控运维技术研究 |
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| 摘 要： | 高压与超高压交联电缆金属护套与电缆线芯之间的缓冲层是电缆的重要组成部分。近年,国内交联聚乙烯(XLPE)高压电缆线路故障中多次出现缓冲层放电现象。文中总结国内电缆缓冲层设计经验,分析不同类型高压电力电缆缓冲层作用,总结缓冲层半导电材料、长期进水运行、缓冲层设计缺陷等可能放电原因,通过分析三起高压电缆缓冲层放电典型案例,说明缓冲层设计的缺陷隐患及缓冲层放电问题原因,对电缆设计及电缆故障分析提供有效参考。
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| 关 键 词： | 电缆 缓冲层 放电 铜丝纤维编织布 |
| 收稿时间： | 2017/11/9 0:00:00 |
| 修稿时间： | 2017/12/27 0:00:00 |
Analysis of High Voltage XLPE Power Cable Buffer Layer Discharge Problem |
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| Authors: | LI Chenying LI Hongze CHEN Jie HU Libin TAN Xiao CAO Jingying |
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| Affiliation: | State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China;State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210024, China |
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| Abstract: | The buffer layer is an important part of HV and EHV XLPE cable,influencing the cable mechanical properties and thermal performance.In recent years,most of cross-linked polyethylene (XLPE) HV cable faults in domestic were the buffer layer discharge.The designs of domestic cable buffer layer were summarized,with different types of high voltage power cables buffer layer effect analyzed.The possible reasons including materials,running in water,buffer layer design were exposed.With the analysis of three typical cases,the design hidden trouble and the buffer layer discharge problem were exposed to provide effective reference for cable design and cable fault analysis. |
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| Keywords: | cable buffer layer discharge copper fiber woven cloth |
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