Research on Alternating Current Resistance of High-Voltage Cable Conductors: Optimization of Test Method and Discussion of Test Results

Guiyuan Yang, Yanqi Zeng, Xiaofeng Xu, Xiaodong Liu, Haowen Chen, Dong Dai and Gang Liu ()
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Guiyuan Yang: Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
Yanqi Zeng: Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
Xiaofeng Xu: Shanghai Electric Cable Research Institute Co., Ltd., Shanghai 200093, China
Xiaodong Liu: Guangzhou Nanyang Cable Group Co., Ltd., Guangzhou 511356, China
Haowen Chen: Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
Dong Dai: Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
Gang Liu: Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China

Energies, 2025, vol. 18, issue 6, 1-16

Abstract: With advancements in cable manufacturing processes, the physical parameters of certain cable conductors fall outside of the scope specified by the IEC60287-1-1 standard, and the alternating current (AC) resistance calculated using the IEC standard may lead to reliability issues in the thermal evaluation of cable lines. Therefore, conducting an AC resistance test on cable conductors becomes critical for the thermal evaluation of cable lines. The source of error in the existing AC resistance test was analyzed first. It was found that the characteristics of the source used in the test lead to an error between the test value and the actual value of AC resistance. Moreover, an optimized AC resistance testing method based on active power was proposed to decrease the error. The accuracy of the method was also demonstrated. Finally, AC resistance tests were conducted on cable conductors with different cross-sectional areas, segmental methods, and oxidation methods by using the proposed method. The test results are also thoroughly discussed.

Keywords: cable manufacturing processes; IEC standard; AC resistance; active power (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: 2025
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