• 한국군사과학기술학회지
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• 제8권1호
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• pp.32-38
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• 2005

In this study, Experimental analysis on submarine cable tension was performed for the safe and efficient laying and recovery of a submarine cable. The tension analysis was done through the analyzed data using the cable dynamic theory and the measured data using the experiment. The analyzed cable tension was able to decide requirements for the purpose of laying and recovery of the submarine cable. As the result of tension analysis for a Submarine cable, it was shown a proper feasibility to determine the laying and recovery conditions of the submarine cable.

• 전기학회논문지
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• 제61권2호
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• pp.329-334
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• 2012

The distribution submarine cables are normally used for power supply at island, which are mostly installed in the southern coast of KOREA, and partially installed in the west coast and Jeju-Island. There are two way of submarine cable burying system, buried and unburied type. Since 2003, KEPCO is entirely being constructing the distribution submarine cable by buried type. In this case, 'burial depth' is key index for evaluating the suitability of the buried situation. Therefore, the measurement accuracy of 'burial depth' is a big issue for burying system in the distribution submarine cable. This paper demonstrates the measurement error of burial depth that is affected by electrical factor such as grounding type of submarine cable in case of magnetic field detection method, and indicates the method to reduce the measurement error in buried type of distribution submarine cable system.

• 한국전자통신학회논문지
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• 제5권3호
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• pp.227-232
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• 2010

해저케이블은 인류의 또 다른 해저이용으로 부터 고장의 위협을 받고 있다. 이러한 해저 이용 중에 우리나라에서 해저 광케이블 안전을 위협하는 요소로는 트롤어선의 전개판이나 안강망 어선의 앵커와 같은 조업도구인 경우가 대부분이다. 그리고 연안 구간의 양식어업으로 인하여 어장을 고정시키기 위한 나무말목, 쇠말목 설치, 대형선박의 통항에 따른 앵커의 낙하 충격 및 끌림 등이 해저케이블의 위해요소로 작용한다. 본 논문에서는 동아시아횡단(EAC, East Asia Crossing)해저케이블망에 대하여 8년간 발생된 고장을 바탕으로 원인분석을 통해 해저케이블 보호대책을 제시하고자 한다.

• 한국전자통신학회논문지
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• 제2권1호
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• pp.34-39
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• 2007

해저광케이블은 대양을 횡단하는 국제통신의 대부분을 처리하고 있는 중요한 정보통신 전달매체이다. 하지만 이러한 해저광케이블 고장 발생시 막대한 수리 비용은 물론, 국제적 국가 신뢰도 추락, 통신 소통의 두절로 많은 어려움과 손실을 초래한다. 따라서, 본 논문에서는 해저케이블 안정성을 위한 방안을 도출하고자 국내외 해저광케이블 현황 및 고장원인을 분석한 후 고장 예방을 위한 기법과 해저시설 사용자간 보호 규정 마련을 제시하고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.490-491
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• 2011

This paper describes the EMTP/ATP Draw modeling HVDC submarine cable. HVDC submarine cables consist of conductor, lead sheath and amore. It is different from general cable which is composed with just conductor and aluminium sheath. Therefore, the transient characteristics are totally different between HVDC submarin cable and general cable. However, the study on HVDC cable modeling and Transient are insufficient. In this paper, characteristic and effectiveness of HVDC Submarine Cable through Transient analysis. Therefore it is evaluated that the application of HVDC Submarine cable at the field should be considered cautiously when more detailed transient analysis, another electrical testes and economic evaluations are implemented.

• 한국전자통신학회논문지
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• 제2권3호
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• pp.185-190
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• 2007

해저케이블 장애의 가장 큰 원인은 어로 활동으로써 약 70%가 어선의 닻으로 인해 발생되며, 수심 200m 이내 지역에서 가장 많이 발생 하고 있다. 이는 어선으로 부터 해저케이블 보호를 위한 보호규정마련과 천해부에서 케이블 건설 기준이 마련되어야 함을 알 수 있다. 본고에서는 해저 이용자간 구조물 설치를 위한 방안을 제시하고 관련법을 마련토록 제언하였으며, 해저케이블 포설사업자들이 일반적으로 설치하던 천해부에서 해저케이블 매설 기법을 보완 발전시켜 정부차원의 관련 기술기준을 마련하고자 한다.

• 제어로봇시스템학회논문지
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• 제7권6호
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• pp.502-508
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• 2001

In this paper, slack is computed from a comparison of the cable pay out rate and the ship ground speed in accordance with laying conditions, and the speed controller of the cable engine based on an H(sub)$\infty$ servo control id designed for adjusting the cable engine in order to lay a desired amount of slack. The controller is designed for robust tracking of the cable engine under disturbances. The performance of the designed controller is evaluated by computer simulation, and, consequently, a feasibility study for laying the submarine cable stably is done through analyzing simulation results.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2017년도 학술발표회
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• pp.329-329
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• 2017

In this study attempted to evaluate the stability of the protection methods by examining hydraulic characteristics of the area around the point in which marine cable protector is installed such as surf zone occurrence point of shore-end submarine cables suitable for coastal marine environmental conditions, flow rate t the tope of the protector and maximum wave height, and to provide basic data for the selection of the optimal protection method. In performing hydraulic model experiments, the topography of submarine cable installation location was reproduced in 2-D sectional channel, and models appropriate for experimental scale and similitude law were produced and installed for each condition of submarine cables and protectors. Since the topography and submarine cable protectors were reproduced and installed in 2-D sectional channel, the exact reproduction of surf and transformation in shallow water zone was possible, and thus the physical properties could be clearly analyzed. For stability review, an experiment to examine the stability was conducted using a wave maker with 50-year frequency design waves as target, and wave height and cycles were applied based on the approximate lowest low water level(Approx. L.L.W), which is the most dangerous in submarine cable protection methods. As for experimental time, typhoon passing time in summer (about 3 hours) was applied, and wave patterns and deviation ratio of the submarine cable protector were investigated after making irregular waves corresponding to design waves. In addition, current meter and wave height meter were installed at the installation location of the submarine cable protector, and the flow rates and wave height at the top of the protector were measured and analyzed to review hydraulic properties.

• 한국전기전자재료학회논문지
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• 제36권6호
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• pp.570-575
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• 2023

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.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.616-618
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• 2007

This paper describes the mechanical and electrical test on HVDC submarine cable, Flexible Repair Joint and termination for 180kV. This HVDC submarine cable was manufactured using LS cable's unique skill and would be applied the HVDC submarine cable system in korea. The performance test consist of mechanical test and electrical test. The tensile bending test and tensile test was done as the mechanical test and Electrical test is DC voltage and Impulse test. The tensile bending test carried out 6 times(double of specified times) for maximum reliability. The DC test voltage is $\pm$400kV/1hr. We estimate the lower limit of DC breakdown voltage is 600kV. The impulse test voltage is $\pm$800kV/10shots. The type of developed cables is the MI type. Its insulation consist of paper tapes impregnated with a high viscosity oil. The development of new HVDC cable is available for HVDC underground or submarine power transmission. The developed HVDC cable, FRJ and termination have passed the mechanical and electrical test successfully and showed excellent performance.