[논문]해상풍력단지 J-Tube 내부 해저케이블의 절연 특성 평가

이승원; 최진욱; 김해종

doi:10.4313/jkem.2023.36.6.5

[국내논문] 해상풍력단지 J-Tube 내부 해저케이블의 절연 특성 평가
Insulation Characteristics Evaluation of Submarine Cables Inside the J-Tube of Offshore Wind Farms 원문보기

전기전자재료학회논문지 = Journal of the Korean institute of electronic material engineers, v.36 no.6, 2023년, pp.570 - 575

이승원 (한국전기연구원 전력케이블연구센터) , 최진욱 (한국전기연구원 전력케이블연구센터) , 김해종 (한국전기연구원 전력케이블연구센터)

Abstract ▼ AI-Helper

Demand and necessity for eco-friendly offshore wind farms have been increasing. Research on submarine cables is constantly being considered for a reliable and stable power transmission. This study aimed to evaluate the thermal aging characteristic of submarine cables inside the J-tube of offshore wind farms. In this study, a submarine cable was set in three sections: The first is the part exposed to the air above the sea level at high temperature. The second is the section exposed to repeated temperature fluctuation as the sea level rises and falls. The third is the part submerged at low temperature below the sea level. Aged samples were tested by using the method of electrical evaluation to obtain insulation characteristics. The experimental results show that the dielectric breakdown of the sample with temperature fluctuation was 7% lower than the sample with a constant temperature; thereby, demonstrating that the section where the temperature fluctuation occurred in the submarine cables was weaker than the other. The sections of submarine cable with temperature fluctuations are believed as a weak point during operation; therefore, this part should be monitored preferentially.

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표/그림 (15)

그림 Fig. 1. Submarine cable inside J-tube of offshore wind farm.
그림 Fig. 2. Circuit and vector diagram for tanδ.
표 Table 1. Methods of insulation characteristics evaluation and test standards.
그림 Fig. 3. Cross section of 66 kV three-core submarine cable.
그림 Fig. 4. Flow chart for manufacturing test samples in sheet form.
그림 Fig. 5. Test samples in sheet form.
그림 Fig. 6. Thermal aging conditions for 1 cycle.
그림 Fig. 7. Thermal aging test using oven.
그림 Fig. 8. Electrode for dielectric breakdown test.
그림 Fig. 9. Measuring tanδ of XLPE insulation.
표 Table 2. Aging conditions of the test sample according to the area of submarine cable inside J-tube.
표 Table 3. Measurement conditions according to methods of insulation characteristics evaluation.
그림 Fig. 10. Measuring system of volume resistivity.
그림 Fig. 11. Dielectric breakdown according to section.
표 Table 4. Insulation characteristics by aging conditions.

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