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Energies 2016, 9(11), 932; doi:10.3390/en9110932

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

1
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
2
Chengdu Electrical Power Department, SiChuan Electrical Power Company, Chengdu 610041, China
3
State Grid Zhejiang Electric Power Company, Hangzhou 310008, China
4
The Wuhan Branch of China Electric Power Research Institute, Wuhan 430071, China
*
Author to whom correspondence should be addressed.
Academic Editor: Marco Marengo
Received: 14 September 2016 / Revised: 23 October 2016 / Accepted: 1 November 2016 / Published: 9 November 2016
(This article belongs to the Special Issue Advanced Thermal Simulation of Energy Systems)

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 Tamb and load current I were analyzed, and according to the thermal-mechanical characteristics of a cable joint under internal defects, the temperature difference ΔTf and stress difference Δσf 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. View Full-Text
Keywords: coupling fields; defects characteristics; temperature field; stress field; evaluation of internal defects; power cable joint coupling fields; defects characteristics; temperature field; stress field; evaluation of internal defects; power cable joint
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yang, F.; Liu, K.; Cheng, P.; Wang, S.; Wang, X.; Gao, B.; Fang, Y.; Xia, R.; Ullah, I. The Coupling Fields Characteristics of Cable Joints and Application in the Evaluation of Crimping Process Defects. Energies 2016, 9, 932.

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