直流电缆主绝缘与屏蔽层界面形貌对电场畸变的仿真研究

doi:10.11985/2018.11.004

电气工程学报 ›› 2018, Vol. 13 ›› Issue (11): 30-36.doi: 10.11985/2018.11.004

直流电缆主绝缘与屏蔽层界面形貌对电场畸变的仿真研究

尹毅¹,吴建东¹,胡嘉磊¹,张磊^2,³,孙璐^2,³,沈耀军^2,³

^1. 上海交通大学电子信息与电气工程学院电气工程系上海 200240
^2. 国网浙江省电力有限公司舟山供电公司舟山 316021
^3. 浙江舟山海洋输电研究院舟山 316021

收稿日期:2018-08-03 出版日期:2018-11-30 发布日期:2020-01-02
作者简介:尹毅男 1972年生,博士,教授,博士生导师,主要从事电介质物理理论与相关测试技术等方面的研究工作。|吴建东男 1982年生,博士,副研究员,主要从事电介质物理理论与相关测试技术等方面的研究工作。
基金资助:
国网科技项目《±320kV及以下柔性直流电缆性能评价体系研究》(52110116004Z)

Simulation of Electric Field Distortion Caused by Interface Morphology Between Insulation and Shielding in HVDC Cables

Yin Yi¹,Wu Jiandong¹,Hu Jialei¹,Zhang Lei^2,³,Sun Lu^2,³,Shen Yaojun^2,³

^1. Shanghai Jiao Tong University Shanghai 200240 China
^2. Zhoushan Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd. Zhoushan 316021 China
^3. Zhejiang Zhoushan Marine Power Research Institute Zhoushan 316021 China

Received:2018-08-03 Online:2018-11-30 Published:2020-01-02

摘要/Abstract

摘要：

高压直流电缆中,主绝缘与屏蔽层的界面形貌,引起界面附近主绝缘内电场的畸变,是造成电缆绝缘故障的原因之一。这种界面形貌形成的机理与屏蔽层中掺杂的炭黑颗粒有关,在生产过程中,这些颗粒进入主绝缘内,形成局部凸起,引发电场集中。本文从该机理出发,基于随机过程建立界面形貌的几何模型,有限元仿真计算界面附近的电场分布,从统计的意义上,研究该界面形貌对电场畸变的影响。结果表明,为降低界面形貌引起的电场畸变,最有效的方法之一是增大屏蔽层中掺杂炭黑颗粒的粒径和减小这些颗粒进入主绝缘的深度。若屏蔽层中有不可去除的小粒径颗粒,则可以掺杂大颗粒炭黑从概率上减小电场畸变。

关键词: 界面形貌, 直流电缆, 随机过程, 有限元, 仿真

Abstract:

In HVDC cables, the interface morphology between insulation and shielding will cause electric field distortion. This is one of the reasons of cable insulation faults. Such morphology is related to the carbon black particles added in the shielding. In the process of cable production, these carbon black particles may enter insulation, form bulges on the interface, and thus cause electric field concentration. In this paper, the above mechanism is considered. Geometric model of such morphology is established based on stochastic process. Finite element method is used to solve electric field distribution near the interface. Electric field distortion caused by interface morphology is studied from the aspect of statistics. As results show, to reduces such distortion, one of the most effective methods is increase carbon black particle diameter or reduce the depth of particle entry. If there are small and unremovable particles in the shielding, it is recommended that big carbon black particles should be added.

Key words: Interface morphology, HVDC cable, stochastic process, finite element method, simulation

中图分类号:

TM215

尹毅,吴建东,胡嘉磊,张磊,孙璐,沈耀军. 直流电缆主绝缘与屏蔽层界面形貌对电场畸变的仿真研究[J]. 电气工程学报, 2018, 13(11): 30-36.

Yin Yi,Wu Jiandong,Hu Jialei,Zhang Lei,Sun Lu,Shen Yaojun. Simulation of Electric Field Distortion Caused by Interface Morphology Between Insulation and Shielding in HVDC Cables[J]. Journal of Electrical Engineering, 2018, 13(11): 30-36.

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直流电缆主绝缘与屏蔽层界面形貌对电场畸变的仿真研究

Simulation of Electric Field Distortion Caused by Interface Morphology Between Insulation and Shielding in HVDC Cables

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