Influence of High Temperature on Surface Flashover Characteristics of Insulating Blankets Used in Live Working of Distribution Lines

被引：0
|
作者：
Li P. [1 ,2 ]
Liu C. [1 ,2 ]
Li H. [3 ]
Huang Y. [1 ,2 ]
Wu T. [1 ,2 ]
Pu Z. [1 ,2 ]
Fang C. [1 ,2 ]
机构：
[1] College of Electrical Engineering & New Energy, China Three Gorges University, Yichang
[2] Hubei Provincial Engineering Technology Research Center for Power Transmission Line(China Three Gorges University), Yichang
[3] State Grid Hubei Wuhan Jiangxia Power Supply Company, Wuhan
来源：
Dianwang Jishu/Power System Technology | 2021年 / 45卷 / 12期
基金：
中国国家自然科学基金;
关键词：
High temperature; Insulating blanket; Leakage current; Live working; Surface flashover;
D O I：
10.13335/j.1000-3673.pst.2020.2034
中图分类号：
学科分类号：
摘要：
Live working is an important technical means to improve the reliability of the power distribution network and the quality of services, and the insulating blanket is one of the main shielding appliances to protect the safety of workers during the live working. In order to study the influence of high temperature on the insulation performance of the insulating blankets, the rubber and resin insulating blankets are selected as the research objects. The surface flashover characteristics tests under different temperatures and flashover distances are carried out. The results show that the leakage current peaks of the rubber and resin insulating blankets are both increased with the increase of temperature, and the increase rate is greater when the temperature is within 40~80 ℃. When the flashover distance is in 3~5 cm, and the temperature is at 20 or 80 ℃, the resin insulation blanket has a better insulation performance with its flashover field strength at 7.02 and 6.33 kV/cm respectively. The flashover voltages of the rubber and resin insulating blankets decrease linearly with the increase of temperature, but the insulation performance of the resin insulating blanket under high temperature decreases obviously due to the obvious thermal deformation around 60~80 ℃. Hence, in the actual live working, the resin insulation blanket should be preferred. However, it is necessary to pay attention to the hot melting phenomenon at high temperature in case its insulation performance decreases greatly and endangers the safety of the operators. © 2021, Power System Technology Press. All right reserved.
引用
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页码：4971 / 4978
页数：7
相关论文
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