摘要详情

ID / 提交时间

374 / 2021-11-10 19:56:30

标题

Study on the characteristics of dielectric charge transport in polypropylene cables

关键字

Polypropylene cable,Dielectric,Charge transport

主题及专题

High voltage and insulation technology > Other topics in high voltage and insulation technology

状态

终稿

作者

Liying Yu / North China Electric Power University

Haozhi Shi / North China Electric Power University

Zhen Zhang / North China Electric Power University

Shusheng Zheng / North China Electric Power University

Chengrong Li / North China Electric Power University

摘要

The performance of cables in HVDC transmission projects is directly related to the safe and stable operation of the entire system. As the main insulation material of cables, the space charge injection and accumulation characteristics of polypropylene under the action of DC voltage are important factors for the electrical breakdown of the insulation medium. This paper establishes a bipolar carrier simulation model of polypropylene material, and analyzes the influence of different parameters on the charge transport process. The simulation results show that with the increase of trap density, the electric field distribution inside the material has a similar change trend, but the charge migration speed gradually slows down; the decrease of the trapping coefficient and the increase of the detrapping coefficient will accelerate the migration of the charge; the temperature difference on the electrode The existence of, the charge injected on the high-temperature side becomes the dominant charge; when the polarity is reversed, the injection of electrons and holes at both ends of the medium is also reversed, and the degree of charge change increases with the increase of the voltage after the reversal.

重要日期

会议日期

07月11日

2023

至

08月18日

2023
11月10日 2021

初稿截稿日期
12月10日 2021

注册截止日期
12月11日 2021

报告提交截止日期

主办单位

IEEE IAS

承办单位

IEEE IAS Student Chapter of Southwest Jiaotong University (SWJTU)
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
IEEE PELS (Power Electronics Society) Student Chapter of HUST