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About RISS
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RISS API 센터
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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RISS 인기검색어
- 검색키워드
- 저자 : 박민원(MinWon Park) (검색결과 199 건)
- 무료
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- 유료
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Sangsoo Park(박상수),Sang-Yong Kim(김상용),Seong-Jae Jang(장성재),Gyeong-Hun Kim(김경훈),Hyo-Ryong Seo(서효룡),Minwon Park(박민원),In-Keun Yu(유인근) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
PV (Photovoltaic) power generation system has been widely studied as a clean and renewable power source. Tracking the MPP (maximum power point) of a PV array is usually an essential part of a PV system. This paper describes POS (Photovoltaic Output Sensorless) MPPT method and optimization technique of its operational characteristics for grid-connected PV generation system. A DC-DC converter has been used to step-up the PV voltage and DC-AC converter has been used for connecting the system to the grid. Optimization technique has been implemented to optimize the current and voltage controller gain parameters and duty ratio increment of DC-DC converter. Simulation results reveal that the proposed control has better response.
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Sang-Min Park(박상민),Chang-Soon Kim(김창순),Le Dinh Vuong(레딘브엉),Minwon Park(박민원),In-Keun Yu(유인근) 한국산업정보학회 2016 한국산업정보학회논문지 Vol.21 No.3
청정에너지 발전설비의 요구가 늘면서 태양광, 풍력, 연료 전지 등의 분산전원 개발이 급속도로 증가하고 있다. 반면에 이러한 증가로 인하여 배전시스템은 복잡해지고 있으며 무효전력으로 인한 역률저감, 불평형 부하에 의한 불평형 전류 등의 문제점을 가지고 있다. 이러한 문제점들을 해결하기 위하여 본 논문에서는 태양광용 3상 4선 타입의 전력변환장치에 무효전력, 불평형 전류를 보상하는 알고리즘을 적용하였다. 제안한 태양광 전력변환장치는 기본 출력동작 뿐만 아니라 계통 전력 품질의 저해요소들에 대해서 보상이 가능하며 PSCAD/EMTDC를 이용한 시뮬레이션을 통하여 그 성능을 검증하였다. Development of the distributed energy resources such as photovoltaic, wind, and fuel cell has increased rapidly due to the rising demand for clean energy utilization. On the other hand, the distribution system became complex and has problems such as degradation of power factor and current unbalance caused by power converters, reactive power and unbalanced loads. To solve these problems, this paper proposes a 3-phase 4-leg type power conditioning system with compensation control algorithm for the reactive power and unbalance current in distribution system using photovoltaic resource. It is simulated in PSCAD/EMTDC and the effectiveness is confirmed.
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박희철(Heecheol Park),정환준(Hwanjun Jung),김석호(Seokho Kim),박민원(Minwon Park) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.5-3
HTS (High Temperature Superconductor) technology enables compact and high efficient power generators. To keep the superconducting state, the HTS rotor should be cool down to cryogenic temperature. In general, it is known that the optimum operation temperature is about 30 K considering the cost of the HTS conductors and cooling system. Therefore, cooling system should be designed to keep the temperature of the HTS rotor around 30 K. This can be realized by using the liquid neon thermosyphon cooled by crycooler. This paper describes the design process and experimental results for liquid nitrogen re-condensing cooling system. Heat loss of the torque tube is estimated. Flow areas for liquid and gaseous neon are determined considering the pressure drop. Experiments are performed to estimate the background loss of the cooling system itself and to investigate the heat loss through the torque tube. Additional heating is applied to verify the performance of the cooling system.
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