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과도한 인장력에 따른 해상풍력단지 해저케이블의 절연 특성 평가
이승원 ( Seung-won Lee ),최진욱 ( Jin-wook Choe ),권익수 ( Ik-su Kwon ),김동은 ( Dong-eun Kim ),김해종 ( Hae Jong Kim ) 한국전기전자재료학회 2024 전기전자재료학회논문지 Vol.37 No.3
Research on aged insulation of cables by stress is constantly being considered for reliable and stable power transmission of offshore wind farms. This study aimed to evaluate the insulation characteristic of aged XLPE (cross-linked polyethylene) insulation for application of offshore wind farms. In this study, The XLPE insulation of cable was set as various mechanical strains. The XLPE insulation is exposed to the mechanical stress below yield strain of 5%, 10%, and 20%. Aged samples were tested by using the method of AC BDV (alternative current breakdown voltage), tensile strength, elongation, and SEM (scanning electron microscope) to obtain insulation characteristics. The experimental results show that the dielectric breakdown of the sample with a strain 20% was 50% lower than the unaged sample; thereby, demonstrating that the mechanical strain that occurred in the submarine cables can weaken the insulation characteristics. Therefore, mechanical strain should be monitored when laying and operating submarine cables for offshore wind farms.