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PV모듈의 발전성능시험을 위한 Solar Simulator의 측정불확도 요인 분석
강기환,김경수,박지홍,유권종,안형근,한득영,Kang, Gi-Hwan,Kim, Kyung-Soo,Park, Chi-Hong,Yu, Gwon-Jong,Ahn, Hyung-Keun,Han, Deuk-Young 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.1
In this paper, we analyzed the elements of measurement uncertainty on electrical performance test which are the most important things in photovoltaic module performance test. Repeating the performance test by 6 men, the measurement uncertainty could be calculated. In this experiment, Solar Simulator (A-Class pulse type) used for domestic certificate test of PV module is Pasan IIIb (Balval, Switzerland). The possible elements of the measurement uncertain that could effect electrical performance test of PV module are reference cell, spectrum correction, error from measurement repetition, test condition, stability and uniformity of artificial solar simulator. To find the measurement uncertainty, 6 men repeated the test by 10 times. And the results were that numerical average value was 124.44W and measurement uncertainty was $124.44W{\pm}0.36W$ with 95% confidence level for 125W PV module(KD-5125).
강기환(Kang Gi-Hwan),김경수(Kim Kyung-Soo),유권종(Yu Gwon-Jong),안형근(Ahn Hyung-Keun),한득영(Han Deuk-Young) 한국태양에너지학회 2009 한국태양에너지학회 논문집 Vol.29 No.2
In this experiment, we did sampling 6 kinds of photovoltaic modules and analyzed the discrepancy of measurement results between 1 laboratory and 4 PV makers to have performance repeatability at Standard Test Condition (STC) condition. From the KIER's results. Korea's standard test laboratory, other laboratory showed -10% measurement variation. The causes came from correction of reference cell, test condition and the state of skill. Form the comparison test, we analyzed the problems. But three PV maker reduced measurement variation, other one PV maker and one test laboratory didn't improve the problems of correction of reference cell, test condition and the state of skill. Also, High Efficiency Module had a big discrepancy of -10.0 ~ -6.2% among 3 laboratories which have a less than 10msec light pulse duration time. This made low spectrum response speed so the Fill Factor decreased maximum output power under 10msec light pulse duration time.
강기환(Kang Gi-Hwan),김경수(Kim Kyung-Soo),박지홍(Park Chi-Hong),유권종(Yu Gwon-Jong),안형근(Ahn Hyunggun),한득영(Han Deuk-Young) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper, we examined 10 domestic samples of three different model using thermal, humidity freeze, thermal-endurance and damp heat test under IEC61215 photovoltaic module environmental endurance test condition. Three was almost no changes on power generation. Insulation resistance capacity was much higher than judgement standard but, showed unstable results depending on environmental test items. On external appearance test, there were two models which showed bubble, humidity penetration, seal melted frame phenomenon. From this results, the degree of aging under the external environment is a main cause that shortens photovoltaic module life time. So it is considered that the efforts for finding optimum condition of manufacturing process should be needed.
외부환경적 가속시험에 의한 지붕일체형 태양전지모듈의 내구성 분석
강기환(Kang Gi-Hwan),김경수(Kim Kyung-Soo),유권종(Yu Gwon-Jong),이소미(Lee So-Mi),홍성민(Hong Sung-Min) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
In this paper. we studied analysis of roof integrated photo voltaic module's durability with acceleration test. Two kinds of modules and ten samples were manufactured and tested by electrical and environmental acceleration test method. Through this experiment, we found that all modules have excellence in insulation resistance and maximum output power generation. But there was a great deformation in the external appearance by naked eye examination like bubble, humidity penetration and backsheet tearing. These might be caused by manufacturing process condition and lead degradation when installed outside. The detailed analysis is described in the following paper.
외부환경변화가 태양전지모듈의 광학적 전기적 출력 특성에 미치는 영향
강기환(Kang Gi-Hwan),김경수(Kim Kyung-Soo),박지홍(Park Chi-Hong),유권종(Yu Gwon-Jong),안형근(Ahn HyungKeun),한득영(Han Deuk-Young) 한국태양에너지학회 2007 한국태양에너지학회 학술대회논문집 Vol.- No.-
In this paper. we studied the effects of environmental changes on photovoltaic module's optical and electrical output power characteristics. Five modules were prepared and tested by electrical and optical test methods when exposed outdoor. Through this experiment, we found that all modules have a fluctuation in maximum output power generation and transmittance through the front side glass depending on environmental condition like rain, dust and snow. Combining these results, we did a simulation using SolarPro and annual power generation capacity was calculated. The detailed analysis is described in the following paper.
PV 모듈용 EVA Sheet의 Curing 조건에 따른 Gel Content 특성
강기환(Kang Gi-Hwan),김경수(Kim Kyung-Soo),박경은(Park Kyung-Eun),김현일(Kim Hyun-Il),유권종(Yu Kwon-Jong) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In this paper, we analyzed the effect of EVA Sheet Gel Content depending on curing condition for photovoltaic module. Gel Content was measured by manufacturing Glass/EVA Sheet/Back Sheet scheme at several curing temperature and curing time. And the surface analysis of EVA Sheet depending on process condition could be observed using SEM(Scanning Electron Microscope). Through this experiment, we could confirm that there are differences on Gel Content of EVA Sheet and surface configuration depending on curing temperature and curing time. To find out the optical characteristic dependency on curing condition, Glass/EVA Sheet/Glass scheme was fabricated. The optical transmittance of EVA Sheet at visible wavelength was enhanced 5% when compared to Glass/Glass scheme. And the transmittance of 130 ℃/4min, 110℃/4min, 110℃/6min process condition was higher at ultraviolet wavelength range. These curing conditions could be regarded as the best process for suppression the discoloration speed of EVA Sheet under UV light.
PV용 투명유리와 G/G모듈의 광학적 특성 평가 및 분석
김경수(Kim Kyung-Soo),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.5
In this study, we analyze the electrical optical characteristics of transparent glass for photovoltaic and glass-glass module application. The elemental facts from raw glass to laminated glass with solar cells are analyzed using UV spectrophotometer and spectroradiometer. From the data of transmittance and reflectance, the optimum PV module processing condition and selection of material for fabrication should be considered deeply for obtaining high module efficiency. Also we introduce two glasses which has 2%~4% higher transmittance using coating technology with anti-reflection material. From this experiment, we try to give some basic information for PV module manufacturing industry. The detail description is specified as the following paper.a
후면 유리 종류에 따른 G/G타입 BIPV 모듈의 계절별 특성분석
김하련(Kim Ha-Ryeon),권오은(Kwon Oh-Eun),강기환(Kang Gi-Hwan),유권종(Yu Gwon-Jong),김경수(Kim Kyung-Soo),김준태(Kim Jun-Tae) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11
The purpose of this study is to analysis on the seasonal performance characteristics of glass-glass BIPV modules. In this study five types of semi-transparent glazing with PV modules, distinguished by the backside glass material, have been dealt with: clear glass, PVF(poly vinyl fluoride), bronze glass, low-e glass, and reflecting glass. The analysis of monitoring data shows that the PV module temperature was closely related to the solar radiation on the PV module surface, and the glass type used at the backside also had an effect on the PV module temperature that in turn determines its thermal performance.