• Journal of Electrical Engineering and Technology
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• 제2권1호
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• pp.10-18
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• 2007

The importance of conducting necessary studies on grid reliability evaluation has become increasingly important in recent years due to the number of blackout events occurring throughout the world. Additionally, quantitative evaluation of transmission system reliability is very important in a competitive electricity environment. The reason behind this is that successful operation of an electric power company under a deregulated electricity market depends on transmission system reliability management. The results of many case studies for the Korea Electric Power Cooperation (KEPCO) system using the Transmission Reliability Evaluation for Large-Scale Systems (TRELSS) Version 6.2 are illustrated in this paper. The TRELSS was developed by EPRI and Southern Company Services Inc. This paper presents the reliability analysis of KEPCO system expansion planning by using the TRELSS program.

• 수산경영론집
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• 제54권2호
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• pp.59-76
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• 2023

This study is to propose ways to improve the system for rational procedures for offshore wind power generation projects. The results of this study are summarized as follows. In order to quickly distribute and develop offshore wind power projects, the permitting period should be shortened through special laws, the government actively intervenes to support the formation and operation of privat-public councils to ensure residents' acceptance. In this way, it can be competitive in the future energy market. Above all, a special law (proposal) related to offshore wind power currently pending in the National Assembly should be passed as soon as possible. Finally, the government and local governments that manage public waters should provide active administrative support based on system improvement measures in consideration of these permits, and the project's main body should minimize damage to the marine environment and ecosystem. Through these subject-specific roles, offshore wind power generation will be able to reduce carbon emissions and help establish a sustainable energy production system.

• 한국산학기술학회논문지
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• 제13권5호
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• pp.2045-2053
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• 2012

본 연구는 21세기의 화두로 제시되고 있는 융합기술에 대한 기업이 요구하고 있는 융합형 인재에 대한 기업의 인식을 규명하는데 있다. 이를 위해 대전지역의 기업 110개를 대상으로 기업이 인식하고 있는 융합형 인적자원에 대해 기업의 기술경쟁력 수준에 따라 실증분석을 통해 조사하였다. 본 연구의 결과는 기업의 경쟁력 수준에 따라 선도추격자, 혁신자 및 후발추격자로 분류하여 이들 기업들이 기업 경쟁력을 강화하기 위한 수단으로 융합관련에 대한 패러다임을 어떻게 인식하고 있는지를 조사했다. 선도추격자들은 종합설계자, 문제해결자와 통찰자의 인재를 요구하고 있으며, 혁신자들은 종합설계자, 문제해결자와 전문가를 요구하고 있다. 후발추격자들은 전통적인 인성을 중요시 했다. 기술경영에 대한 인식으로는 모든 집단에서 중요하게 생각하고 있는 것으로 조사되었다. 선도추격자 및 혁신자들은 미래시장에 대한 예측을 위해서는 CEO 및 연구인력 그리고 중간 관리자의 역할이 중요하게 나타났으며 이들에 대한 교육은 이종기술과의 융합능력, 기존 기술의 첨단화 능력 및 시장 수요에 대한 이해를 요구하고 있다. 자사의 제품 혹은 기술에 대해서는 이종 기술과의 접목이 매우 필요한 것으로 나타났다. 이러한 융합기술분야의 전문가에 적합한 인재상은 선도추격자와 혁신자들은 다른 업종과 접목하는 전문가, 기술과 경영을 잘 아는 전문가 및 동종의 다양한 기술을 접목할 줄 아는 전문가를 요구했다. 반면에 후발추격자들은 다른 업종과의 접목하는 전문가를 요구했다.

• 한국정보처리학회논문지
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• 제6권9호
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• pp.2460-2469
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• 1999

최근 다양한 무선통신 서비스가 출현함에 따라 무선호출 서비스의 경쟁력이 요구된다. 본 논문에서는 가격 및 기술 경쟁력을 높이기 위해 양방향 무선호출 위성지구국 시스템을 제안하였고 위성링크를 설계하였으며 무궁화위성을 이용한 무선호출망에 대해 설명하였다. 또한 단말국의 비용을 줄이기 위해 중심국과 단말국의 크기를 다르게 설계하였고, 인바운드와 아웃바운드의 전력배당 방법을 제안하였으며 본 위성링크설계에 이용하였다. 링크설계 결과 강우시간율 0.043%에서 중심국과 단말국의 안테나 크기는 3.7m와 1.2m이고 HPA 크기는 10.37W와 2.0W이며 아웃바운드와 인바운드의 전력배당은 84%와 16%로 설계되었다. 또한 강우시간율 0.02%에서 중심국과 단말국의 안테나 크기는 3.7m와 1.8m 그리고 아웃바운드와 인바운드의 전력배당은 63%와 37%로 설계되었다.

• 한국항해항만학회지
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• 제31권2호
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• pp.133-139
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• 2007

Relative importance of maritime transport that takes charge of main current of freight in country' economy is very large. Especially, port and facility carry out important role which treats freight of import and export smoothly and improves international trade as turning point, to achieve key role on connection and association between sea and land. For such reason, enlargement of port facilities or development of port needs to grasp exactly the utilization of port, attributes and selective factors of shipper. On the other hand, the amounts of physical distribution on Mokpo port located in Korean west coast are increasing, with fast economic growth of East Asian including China. This study uses discrete choice model that is measuring to analyze attribute and characteristic of Mokpo port, and analyzes port selection by decision factors of shipper. This paper composed a questionnaire using the result of preceding research, to decide port selection factor among competitive ports. Through factor analysis on a basis of the questionnaire' result, five principal components were extracted. These are resorted out by Logit model, to grasp competitive elements of port. This research fin present direction which raises competitive power of ports in west coast of Korea, especially on alternative and concentration of middle-class port as Mokpo may be useful.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2006년도 춘계종합학술대회
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• pp.1047-1050
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• 2006

지식기반사회에서는 국가 경쟁력은 핵심원천기술의 보유여부가 크게 좌우한다. 국내 기업들이나 국가출연연구원들은 우수특허를 많이 확보하고 있으나 이러한 특허들은 대개 경쟁적인 등록으로 인해 상용화되기 어렵다. 또한 관리대상 특허들이 많아 매년 많은 유지비용을 부담한다. 따라서 체계적인 산업재산권의 관리에 대한 연구의 필요성에 따라 웹상에서 전문평가위원들의 특허 평가와 관리자의 효율적 관리가 가능한 특허관리시스템을 구현하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
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• pp.237-239
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• 2005

The importance and necessity conducting studies on grid reliability evaluation have been increasingly important in recent years due to the number of black-out events occurring through in the world. Quantity evaluation of transmission system reliability is very important in a competitive electricity environment. The reason is that the successful operation of electric power under a deregulated electricity market depends on transmission system reliability management. Also in Korea it takes places. This paper presents the probabilistic reliability evaluation for 765KV transmission lines of KEPCO grid expansion planning. The Transmission Reliability Evaluation for large-Scale Systems (TRElSS) Version 6.2, a software package developed by Electric Power Research Institute (EPRI) is utilized in determining the improved probabilistic reliability indices of (KEPCO) system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.11-14
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• 2004

In recent, the importance and necessity of some studies on reliability evaluation of grid comes from the recent black-out accidents occurred in the world. The quantity evaluation of transmission system reliability is very important under competitive electricity environment. The reason is that the successful operation of electric power under the deregulated electricity market depends on transmission system reliability management. This paper introduces features and operation modes of the Transmission Reliability Evaluation for Large-Scale Systems(TRELSS) Version 6.2, a program made in EPRI, for assessing reliability indices of composite power system. The package accesses not only bulk but also buses indices for reliability evaluation of composite powers system. The characteristics of the TRELSS program are illustrated by the case studies using the KEPCO system

• 한국유체기계학회 논문집
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• 제19권4호
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• pp.43-47
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• 2016

Vertical axis wind turbine, despite of its limit in power efficiency, the simplicity in structure and maintenance is a competitive factor that keeps this type of turbine in the game until nowadays. Continuous solutions have been given to handle its major weakness and the use of omni-directional guide vane is an considerable one. In this paper, a 5kkW scale Savonius-based wind turbine enhanced with such guide vane system was design and studied. Together with reasonable blade design, the wind turbine shows promising performance compared with basic design while maintaining its original advantages.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전력기술부문
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• pp.67-70
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• 2003

In recent, the importance and necessity of some studies on reliability evaluation of grid come from the recent black-out accidents occurred in the world. The quantity evaluation of transmission system reliability is very important under competitive electricity environment. The reason is that the successful operation of electric power under the deregulated electricity market depends on transmission system reliability management. The various results of many case studies for the IEEE 25buses system using the Transmission Reliability Evaluation for Large-Scale Systems(TRELSS) Version 5_1, a program made in EPRI are introduced in this paper. Some sensitivity analysis has been included. This paper suggests that the some important input parameters of the TRELSS can be determined optimally from this sensitivity analysis for high reliability level operation of a system.