• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2011년도 춘계학술대회 초록집
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• pp.136.1-136.1
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• 2011

An energy modeling analysis method currently has been considered as a new approach for energy policy research, because the importance of renewable energy use has been emphasized more and more. This study used RETScreen model as a clean energy decision making methodology for adaptation to climate change and elimination of various pollutions. This modeling method includes five step standard analysis; energy model, cost analysis, GHG analysis, financial analysis, and sensitivity & risk analysis and it also assesses both conventional and modern energy sources and technologies. This methodology for the photovoltaic(PV) energy modeling is used to evaluate the energy production, financial performance and GHG emissions reduction of photovoltaic projects. In addition, the PV application systems are classified into three basic applications; On-grid system, Off-grid system and water pumping system. This study assesses the renewable energy techno-economic modeling method with the feasibility analysis result of 10 MW PV power plant in Abu Dhabi in United Arab Emirates. Furthermore this study stresses the importance of renewable energy model research by applying to domestic PV power plant which is now in preparation.

• 복합신소재구조학회 논문집
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• 제5권1호
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• pp.1-8
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• 2014

Pultruded glass fiber reinforced polymeric plastic (PFRP) and FRP member manufactured by sheet molding compound (SMC) have superior mechanical and physical properties compared with those of conventional structural materials. Since FRP has an excellent corrosion-resistance and high specific strength and stiffness, the FRP material may be highly appreciated for the development of floating-type photovoltaic (PV) power generation system. In this paper, advanced floating PV generation system made of PFRP and SMC is designed. In the design, it includes tracking solar altitude by tilting photovoltaic arrays and tracking solar azimuth by spinning structures. Moreover, the results of the finite element analysis (FEA) are presented to confirm stability of entire structure under the external loads. Additionally, installation procedure and mooring systems in the Hap-Cheon Dam are discussed and the measurement of strain under the actual circumstances is conducted for assuring stability of actually installed structures. Finally, by comparison with allowable stress, appropriate safety of structure is confirmed to operate the system.

• 한국산학기술학회논문지
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• 제14권2호
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• pp.828-834
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• 2013

본 논문에서는 태양광 집광 효율 향상을 위한 많은 연구 방법 중 하나로서 태양광을 효율적으로 집광할 수 있는 TMC(Tracker Motion Controller) 시스템 구성하여 발전효율의 향상성을 갖춘 집광형 태양광 발전시스템(CPV)과 실리콘을 이용한 PV 시스템으로 실험하였다. 태양추적 발전시스템에 사용되는 마이크로프로세서는 실시간으로 태양광의 고도와 위도 각을 계산한다. 또 한 센서로부터 값을 받아들이고, 태양의 현재 위치 값을 계산하여 모터를 제어하며 중앙제어 시스템과의 통신을 하기 때문에 적용 가능성에 대한 부담이 커지고 있다. 따라서 집광형 태양광 발전시스템에 적합한 프로그램 방식과 센서방식을 혼합한 하이브리드 방식의 알고리즘 통하여 ARM코어를 내장한 TMC에 구현하였으며, 구현된 TMC를 통하여 기존 PV시스템, CPV 시스템 대비하여 국내에서의 발전효율을 비교 분석하였다. 실험결과 기존의 센서방식을 이용한 집광형 태양광 발전 시스템에 GPS통신 값을 통해 프로그램 방식의 천문학 계산에 의하여 지평좌표계에서의 태양의 방위각과 고도각을 계산하는 하이브리드 태양위치추적 방식을 실험한 결과를 보면 맑고 일사량이 높은 날에는 큰 차이를 보이진 않았다. 그러나 흐리고 맑은 날 등 일사량이 없어 센서가 태양의 위치를 추적하지 못하고 멈춘 상태에서 일정 시간이 지난 후 태양이 센서의 사각지대에서 나타나면 센서의 오류가 생길 수 있는 기후변화에서는 오히려 센서방식보다 더 우수함을 확인할 수 있었다. 태양전지의 발전효율이 높아지고 생산발전 단가가 줄이는 부분에 대한 지속적인 연구, 더불어 기후의 변화에 따른 최적의 발전 능력을 가진 TMC를 적용한 고효율 집광형 시스템에 대한 연구가 지속적으로 필요할 것으로 기대된다.

• 태양에너지
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• 제16권2호
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• pp.7-14
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• 1996

Korean goverment is promoting "the Rural Electrification Project" to replace the diesel generators with PV power supply. The PV-diesel hybrid system are proven more cost effective than that of the existing, especially in the. case of small islands(less than 70 households). In this paper, we intend to introduce the Hahwado island PV system assisted with diesel generator and remote monitoring systems as observator. The purpose of this observator is to have minimum maintenance, to improve economical effciency and system reliability by checking the system periodically at certain time interval, and to make diagnosis of its operating situations. The remote monitoring system was designed to communicate between the central and local site through exclusive telephone line on real-time base, using Window '95 version.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 춘계학술발표대회 논문집
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• pp.49-54
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• 2008

This study is to investigate an optimal size and position of PV system for apartment complex enough the electrical load matching analysis. The 4 types of arrangements of apartment buildings are considered as follows; ㅡtype, alternative ㅡtype, ㄱtype and ㅁtype. We assume that the studied site is composed of 9 buildings. Firstly, solar access evaluation of roof and facade in apartment buildings was performing with the hourly simulations of total received insolation on each surface considering the hading effect of buildings. Electrical load profile of typical Korean apartments was investigated for the lad matching analysis. To calculate an annual total PV output, we used MERIT program which is a sourly based load matching tool developed by ESRU. TRY weather data of Daejeon are applied for this analysis. Result shows that approximately 11% of total electric load of the site can be supplied by the PV system in the case of full installation of PV system at the whole south-face roof area of 9 buildings in this stuided apartment complex. Depending of a various installation option of roof and facade area, the possible ratio of PV supply in total electrical load varies from 9% to 42%. Among the 4 arrangement types, the ㅡ type revealed the best option for the maximum output of PV system.

• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.169-174
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• 2007

Building integrated photovoltaic(BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated. This study is to establish basic Information for designing effective BIPV by discovering relations between temperature and generation capability through experiment when the PV module is used as roof material for houses. To do so, we established 3kW full scale mock-up model with real size house and attached an PV array by cutting in half. This is to assess temperature influence depending on whether there is a ventilation on the rear side of PV module or not.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 추계학술대회 논문집
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• pp.291-295
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• 2009

Economic and environmental concerns over fossil fuels encourage the development of photovoltaic(PV) energy systems. Due to the intermittent nature of solar energy. energy storage is needed in a stand-alone PV system for the purpose of ensuring continuous power flow. Grid-connected PV system that supply power in a critical load demand require to curb power fluctuation. In this case. SCB is a effectiveness in controlling power variation due to intrinsic PV system. We propose the Matlab/Simulink dynamic model and power flow characteristics of a hybrid energy system with PV and SCB.

• Journal of Advanced Marine Engineering and Technology
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• 제31권5호
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• pp.583-591
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• 2007

This paper reports the performance of a 150W PV-wave hybrid system with battery storage in buoy. This system was originally designed to meet a new hybrid ower system for buoy in Korea. In the case or lighted buoys and lighthouses, a light failure alarm system of wireless radio is attached so that light failures are immediately notified to the office. At lighthouse offshore fixed lights and light buoys where commercial electricity is not available, the power source depends on solar system and batteries. This power system has a various problems. Therefore energy derived from the sunshine, wind and waves has been used as the energy source lot aids to navigation. Recently a hybrid system of combining the solar, wind and the wave generator is a favorable system lot the ocean facilities like lighthouse and buoy. The hybrid system in this paper is intended for variable DC load like light, communication system in the buoy and includes a PV-wane generation system and battery. This is composed a high efficiency charging algorithm, switching converter and controller. This paper includes discussion on system reliability, power quality, and effects of hybrid system in the buoy. Simulation and experimental results show excellent performance.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1996년도 창립기념 전력전자학술발표회 논문집
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• pp.103-108
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• 1996

In this paper, a novel utility connected photovoltaic power generation system with unity power factor and uninterruptable power system facility and its control strategy are proposed. The proposed photovoltaic(PV) system is connected in parallel between utility and load. The PV system provides an uninterruptable voltage to load, a maximum power tracking to solar array, and power factor correction to the utility. The proposed system has the following advantages compared with the conventional utility connected PV system. 1. Harmonic elimination Function 2. Feeding the photovoltaic energy to the utility 3. Providing the uninterruptible power source along battery to the load In case that the photovoltaic array system is on the poor power generation, the battery and capacitor of the PV system are charged by three phase utility source and the inverter in the PV system only provides the reactive current to eliminate the harmonic current exited on the utility. In the normal operation mode, the PV system supplies active power to load and reactive power to utility in order to maintain the unity power factor and to regulate ac load voltage.

• 한국산학기술학회논문지
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• 제21권5호
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• pp.585-591
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• 2020

최근 정부정책에 따른 원자력 발전의 감축과 신재생에너지의 급속한 보급확대에 따라 국내 태양광 발전 설치가 급격히 확대되고 있다. 이러한 태양광 발전 설비의 급속한 증가는 필연적으로 신재생에너지 산업에서의 폐기물 증가로 이어진다. 그러나 현재 신재생에너지 분야에서 발생한 폐기물에 대한 국내 사후 관리 시스템 구축에 대한 정책 논의는 미비하다. 동 연구는 태양광 패널 재활용 산업의 비용 및 편익을 추정하고 한국의 태양광 폐기물 재활용 정책에 대한 시사점을 도출하고자 한다. 동 연구의 결과에 따르면, 태양광 패널 재활용 사업의 실행 기간이 10년일 경우, 재활용 프로젝트의 수익성이 매우 낮다는 결론이 도출된다. 반면 재활용 프로젝트의 기간이 20년으로 연장될 경우, 2030년 이후 국내 태양광 폐기물의 총 용량이 크게 증가하여 규모의 경제로 인해 프로젝트의 경제 효율성이 충분히 높아질 수 있다는 결론을 도출하였다. 태양광 패널 재활용 사업의 경우 단기적으로는 경제적 효율성이 매우 낮기 때문에 민간 기업의 자발적 사업 참여를 기대하기 어렵다. 따라서 재활용 사업의 경제성 향상 및 관련 산업 활성화를 위한 다양한 정부의 정책마련이 긴요하다. 이를 위해서는 i) 폐태양광 패널의 재활용을 위한 법률 제정, ii) 태양광 패널 폐기물 모니터링 및 비용관리를 위한 협회 지정, iii) 태양광 패널 재활용 관련 R & D 수립 및 재활용과 관련된 다양한 비즈니스 모델 개발 등의 정책 마련이 필요하다.