成果報告書詳細
管理番号20090000000079
タイトル*平成20年度中間年報 太陽光発電システム共通基盤技術研究開発 発電量評価技術の研究開発」
公開日2009/7/30
報告書年度2008 - 2008
委託先名財団法人日本気象協会
プロジェクト番号P07015
部署名新エネルギー技術開発部 太陽電池グループ
和文要約従来よりも広範囲の波長領域(350-1,700 nm)の分光日射強度分布を連続測定できる分光日射計を開発し、日射特性が異なる5 地域において分光日射等の精密観測を実施し、気象データベースとして整備する。(独)産業技術総合研究所(以下、AIST)と共同で、気象条件の異なる地域で、数種類の太陽電池モジュールのI-V 特性同時計測を行う(以後、この計測をラウンドロビン計測と言う)。既存文献及び観測データをもとに、水平面全天日射から分光日射を推定する統計モデルの検討を行った。
英文要約Title: Research and Development of Common Fundamental Technologies for Photovoltaic Generation Systems. Development of new solar cell evaluation technologies. Preparation of Meteorological Database for the Solar Radiation Climatic Regions in Japan and Development a Statistical Model to Estimate Solar Spectral. (FY2006 - FY2009) FY2008 Annual Report
Solar spectral varies with seasons, time and weather depending on solar altitude and atmospheric condition. Since the efficiency of solar cell is influenced by its spectral sensitivity of solar radiation, the database of solar spectral is important for the accurate estimation of output from PV systems. However there was not the spectroradiometer that have capability of continuous measurement for wide range wavelength, solar spectral database was not prepared.
This research was started in FY 2006. In the first fiscal year, we developed a new type spectroradiometer which can measure wide range wavelength between 350 to 1700 nm continuously for filed measurements. Using the new type spectroradiometer, we started the meteorological observation from 2007 April at 5 stations which located in each solar radiation climatic regions in Japan.
From this observation, we can collect a lot of data on various meteorological conditions and insolation conditions. By analyzing these data, it is expected that we can get useful information on some meteorological elements which affect the power generation of PV system, because the data show various states; such as temperature from high to low or irradiance from gloomy to bright, etc.
For case study, we compared the spectral distribution at each station on clear day and cloudy day for each season. In this analysis we have introduced a function named Conversion Function (CF) such that, CF = irradiance at each wavelength/total irradiance. According to the analysis of CF, we can see the similarity of CF on sunny day and solar altitude is high. Also we can see the seasonal difference of CF.
Although the above were case study for few days, but we think CF is very useful function to estimate solar spectral from total irradiance which is measured at meteorological station of Japan Meteorological Agency. In next stage, we will analyze substantial data and perform statistical analysis.
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