Research on the Non-Contact Pollution Monitoring Method of Composite Insulator Based on Space Electric Field

Dongdong Zhang, Hong Xu, Jin Liu, Chengshun Yang, Xiaoning Huang, Zhijin Zhang and Xingliang Jiang
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Dongdong Zhang: School of Electrical Engineering, Nanjing Institute of Technology, Nanjing 210000, China
Hong Xu: School of Electrical Engineering, Nanjing Institute of Technology, Nanjing 210000, China
Jin Liu: State Grid Zhejiang Ninghai County Power Supply Company, Ningbo 315000, China
Chengshun Yang: School of Electrical Engineering, Nanjing Institute of Technology, Nanjing 210000, China
Xiaoning Huang: School of Electrical Engineering, Nanjing Institute of Technology, Nanjing 210000, China
Zhijin Zhang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400000, China
Xingliang Jiang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400000, China

Energies, 2021, vol. 14, issue 8, 1-15

Abstract: Through spatial electric field monitoring, it is expected to realize insulator pollution condition monitoring and contamination flashover warning in a non-contact way. Therefore, in this paper, the spatial electric field distribution characteristics of 110 kV composite insulators are simulated, where the effects of different surface states and their discharge levels on the spatial electric field of insulators are analyzed. On this basis, a non-contact monitoring method for composite insulator pollution based on the spatial electric field is proposed. The results show that there are significant differences in the spatial electric field of the composite insulator among three conditions, namely cleaning, pollution layer wetting, and dry band arcing. Increases of pollution layer wetting and dry band arcing would lead to an increase of the amplitude of the spatial electric field of the insulator. Verification experiments well indicated that it is feasible to identify the degree of pollution layer wetting as well as dry band arcing of the insulator string by fixed-point monitoring, the spatial electric field signal at the cross-strand of d = 0.5 m and directly opposite the last three positions. Research results can provide references for the online monitoring of overhead line polluted insulators and its flashover warning.

Keywords: finite element; composite insulator; electric field strength; operating state; pollution flashover (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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