PHOTOVOLTAIC POWER GENERATION SYSTEM

PROBLEM TO BE SOLVED: To obtain a photovoltaic power generation system for making it possible to accurately calculate an expectation power generation amount of a solar cell module.SOLUTION: A photovoltaic power generation system includes: a solar cell module 3; a pyranometer 9 as insolation measurement means for measuring an amount of insolation; an insolation calculation device 12 as insolation calculation means for calculating, on the basis of a result of the measurement by the insolation measurement means, an amount of insolation that the solar cell module 3 receives; and an expectation power generation amount calculation device 11 as expectation power generation amount calculation means for calculating, by using a result of the calculation by the insolation calculation means, an expectation power generation amount of the solar cell module 3. The insolation measurement means, by being installed so as to be inclined with regard to the horizontal plane, measures an incline insolation amount depending on its incline. The insolation calculation means calculates the amount of insolation that the solar cell module 3 receives, by using installation information that is information on the incline of the insolation measurement means and a result of measuring the incline insolation amount by using the insolation measurement means. 【課題】太陽電池モジュールの期待発電量を精度良く算出可能とする太陽光発電システムを得ること。【解決手段】太陽電池モジュール３と、日射量を計測する日射量計測手段である日射計９と、日射量計測手段での計測結果を基に、太陽電池モジュール３が受ける日射量を算出する日射量算出手段である日射量算出装置１２と、日射量算出手段での算出結果を使用して、太陽電池モジュール３の期待発電量を算出する期待発電量算出手段である期待発電量算出装置１１と、を有し、日射量計測手段は、水平面に対し傾斜を持たせて設置されることにより、傾斜に応じた傾斜面日射量を計測し、日射量算出手段は、日射量計測手段の傾斜に関する情報である設置情報と、日射量計測手段による傾斜面日射量の計測結果とを使用して、太陽電池モジュール３が受ける日射量を算出する。【選択図】図１