Pollution Flashover Properties and Its Mechanism of External Insulation Structures with High Vertical Electric Field Component

被引：0
|
作者：
Zhu M. [1 ]
Wang L. [1 ]
机构：
[1] Graduate School at Shenzhen, Tsinghua University, Shenzhen
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 10期
基金：
国家重点研发计划;
关键词：
Creepage length; Pollution flashover development; Pollution flashover properties; Transition of pollution flashover to slide flashover; Vertical electric field;
D O I：
10.13336/j.1003-6520.hve.20190786
中图分类号：
学科分类号：
摘要：
The external insulation properties of bushings are more complicated compared with those of ordinary insulators. In order to study the influence and its mechanism of vertical electric field on the bushing structure pollution flashover, a simulation platform was established. In accordance with the occurrance of a bushing pollution flashover accident in indonesia, first, the process and causes of this accident were analyzed, and the properties of pollution flashover in this accident were summarized. Secondly, bushing samples based on real bushing were designed and the crucial parameters were verified. Then the samples in the presence or absence of vertical electric fields were tested using an artificial pollution test method. The properties and comparison in the presence or absence of vertical electric field samples were obtained under different equivalent salt deposit density and creepage length, and the real-time voltage-current waveforms was recorded. Lastly, a model of transformation of pollution flashover to slide flashover fitting strong vertical electric field structure characteristics was established. This model fits well with the phenomena in both actual accident and lab experiments. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3615 / 3621
页数：6
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