Pollution Distribution Performance of Windward/Leeward Sides of Insulators and Influential Rule on DC Pollution Flashover Voltage

被引：0
|
作者：
Zhang D. [1 ,2 ]
Ni X. [1 ]
Cheng G. [1 ]
Li J. [1 ]
Hao S. [1 ]
Zhang Z. [2 ]
机构：
[1] Jiangsu Collaborative Innovation Center for Smart Distribution Network, Nanjing Institute of Technology, Nanjing
[2] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 04期
基金：
国家重点研发计划;
关键词：
Contamination; DC pollution flashover; Fluid dynamic; Insulator; Non-uniform pollution; Residual pollution layer resistance; Wind tunnel;
D O I：
10.13336/j.1003-6520.hve.20190513012
中图分类号：
学科分类号：
摘要：
Accidents of pollution flashover still exists in certain areas. It is still of practical significance to further study external insulation pollution issues. The field observations have already shown that insulator surface is coated with obvious non-uniform pollution on windward and leeward sides. Lack of systematical research on this phenomenon makes the existing contamination tests and outdoor pollution insulation designs not to fully reflect the actual situations. Consequently, by carrying out fluid dynamic simulation and artificial tests, we studied the pollution distribution performance of the windward/leeward sides of insulator and their influential rule on DC pollution flashover voltage. Research results indicate that the contamination on insulator windward/leeward side is in fan-shape non-uniform distribution, and the non-uniformity may reach 1/10. The function of DC electric field, the increment of wind velocity, and particle diameters will enhance the pollution non-uniformity. Under windward/leeward side non-uniform pollution, insulator flashover voltage will subject to a considerable reduction of about 30%. The research results are of certain reference value for the external insulation design of high voltage transmission lines. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1353 / 1360
页数：7
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