Independent power supply system and control method for independent power supply system

摘要

PROBLEM TO BE SOLVED: To provide an independent power supply system capable of easily predicting a power generation amount in photovoltaic power generation, and a control method thereof.SOLUTION: An independent power supply system comprises: a pyranometer 30 for measuring a quantity of solar radiation; a photovoltaic power generation part (photovoltaic power generation device 10) for generating power by sunlight, and capable of supplying power to a load; and a control part 40 for predicting the power generated by the photovoltaic power generation part. The control part calculates an atmospheric transmittance for calculation, for calculating a quantity of solar radiation during fine weather which is required for predicting the generated power, based on the quantity of solar radiation during fine weather and a quantity of solar radiation which is measured by the pyranometer.SELECTED DRAWING: Figure 3