The Coupling Fields Characteristics of Cable Joints and Application in the Evaluation of Crimping Process Defects

Fan Yang, Kai Liu, Peng Cheng, Shaohua Wang, Xiaoyu Wang, Bing Gao, Yalin Fang, Rong Xia and Irfan Ullah
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Fan Yang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Kai Liu: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Peng Cheng: Chengdu Electrical Power Department, SiChuan Electrical Power Company, Chengdu 610041, China
Shaohua Wang: State Grid Zhejiang Electric Power Company, Hangzhou 310008, China
Xiaoyu Wang: State Grid Zhejiang Electric Power Company, Hangzhou 310008, China
Bing Gao: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Yalin Fang: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Rong Xia: The Wuhan Branch of China Electric Power Research Institute, Wuhan 430071, China
Irfan Ullah: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China

Energies, 2016, vol. 9, issue 11, 1-19

Abstract: The internal defects of cable joints always accelerate the deterioration of insulation, until finally accidents can arise due to the explosion of the joints. The formation process of this damage often involves changes in the electromagnetic, temperature and stress distribution of the cable joint, therefore, it is necessary to analyze the electromagnetic-thermal-mechanical distribution of cable joints. Aiming at solving this problem, the paper sets up a 3-D electromagnetic-thermal-mechanical coupling model of cable joints under crimping process defects. Based on the model, the electromagnetic losses distribution, temperature distribution and stress distribution of a cable joint and body are calculated. Then, the coupling fields characteristics in different contact coefficient k , ambient temperature T amb and load current I were analyzed, and according to the thermal-mechanical characteristics of a cable joint under internal defects, the temperature difference ? T f and stress difference ? ? f of cable surface are applied to evaluate the internal cable joint defects. Finally, a simplified model of the cable joint is set up to verify the accuracy of the coupling field model proposed in this paper, which indicates that the model can be used to analyze the coupling fields characteristics of cable joints and the method can be applied to evaluate crimping process defects of cable joints.

Keywords: coupling fields; defects characteristics; temperature field; stress field; evaluation of internal defects; power cable joint (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: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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