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내부고장을 고려한 고온형 연료전지 대규모 발전단지의 병렬운전 변압기 적정 뱅크수에 관한 연구
정영환(Young-Whan Chong),채희석(Hui-Seok Chai),성인제(In-Je Sung),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.3
High temperature fuel cell system, such as molten carbonate fuel cells(MCFC) and solid oxide fuel cells(SOFC), are capable of operating at MW rated power output. The power output change of high temperature fuel cell imposes the thermal and mechanical stresses on the fuel cell stack. To minimize the thermal-mechanical stresses on the stack and increase the systems reliability, we should divide the power plant configuration to several banks. However, the improvement of reliability in fuel cell power plant system causes an increase of the investment cost, for example, replacement costs, labor costs, and so on. For this reason - the balance between investment and reliability improvement - many studies about the appropriate level of investment have been conducted. In this paper, we evaluate the cost for operation and installation, the benefit for electric energy and thermal energy sales, and the system reliability for several cases : these cases relate with the bank configuration.
고온 연료전지 발전단지의 내부계통 고장에 의한 운전환경에 대한 분석
정영환(Young-Whan Chong),채희석(Hui-Seok Chai),김재철(Jae-Chul Kim),조성민(Sung-Min Cho) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.8
High temperature fuel cell system, such as molten carbonate fuel cells(MCFC) and solid oxide fuel cells(SOFC), are capable of operating at MW rated power output. The power output change of high temperature fuel cell imposes the thermal and mechanical stresses on the fuel cell stack. To minimize the thermal-mechanical stresses on the stack, increases in the power output of high temperature fuel cell typically must be made at a slow rate. So, the short time interruption of high temperature fuel cell causes considerable generated energy losses. Because of the characteristic of high temperature fuel cell, we analyzed the impact of electrical fault in the fuel cell plant on other fuel cell generators in the same plant site. A various grounding configuration and voltage sag are analyzed. Finally, we presented the solution to minimize the effect of fault on other fuel cell generators.
원전건설 성과관리시스템 성과관리시스템(EVMS) (개발을 위한 요건 분석
원서경 ( Seo Kyung Won ),박원섭 ( Weon Seob Park ),정영환 ( Young Whan Chong ),김재용 ( Jae Yong Kim ),김윤명 ( Yun Myung Kim ) 한국건축시공학회 2013 한국건축시공학회 학술발표대회 논문집 Vol.13 No.1
The Korean nuclear industry acquired technology for each construction stage including engineering, procurement, construction and commissioning from advanced nuclear countries. While the levels of technology and quality have greatly improved, the same cannot be said for the level of project management. In particular, the level of project performance measurement and forecasting project risk still remain at the single project management level. Thus, this paper reviewed the concept of the EVMS method and requirement for the system. The adoption of the EVMS, an advanced project management method, can enable efficient management of project risks and promote an adequate environment for project implementation.