Influence of Surface Charge on Flashover Voltage of Gas Insulated Substation Basin Insulator under AC and DC Voltage

被引：0
|
作者：
Qi B. [1 ,2 ]
Gao C. [2 ]
Zhao L. [3 ]
Li C. [1 ,2 ]
Tu Y. [2 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing
[2] Beijing Key Laboratory of High Voltage & Electromagnetic Compatibility, North China Electric Power University, Beijing
[3] Electric Power Research Institute of China Southern Power Grid, Guangzhou
来源：
Gaodianya Jishu/High Voltage Engineering | 2017年 / 43卷 / 03期
关键词：
Accumulation characteristic; Basin insulator; Flashover voltage; Gas insulated substation; Insulating design margin; Static capacitive probe; Surface charge;
D O I：
10.13336/j.1003-6520.hve.20170303031
中图分类号：
学科分类号：
摘要：
The accumulated surface charge of the insulators in gas insulated substation (GIS) can not only distort the electric field but also decrease the surface flashover voltage. We established a set of high-precision surface charge measurement system utilizing the static capacitive probe method and a matched three-dimensional manipulation devices based on actual 252 kV GIS basin insulator. Referring to the insulating design and flashover properties of GIS basin insulator, an effective surface flashover experimental model was set up. The experimental results indicate that no matter under AC or DC voltage, the more the accumulated surface charge is, and the more the decrease of surface flashover voltage will be. Compared to the surface flashover voltage of insulator under 50 kV AC voltage for 1 hour, the voltage under the condition of 53 kV AC voltage for 3 hours can decrease by 10.2%, while it reaches 23.0% under DC voltage, which indicates the accumulated surface charge has a significant influence on the flashover and must be considered seriously for the insulation design. The research achievement in this paper can provide meaningful reference to the insulating design of insulators in GIS and gas insulated line (GIL). © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：915 / 922
页数：7
相关论文
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