Abstract
In general, the photovoltic power generation systems may be interconnected with the distribution systems of public utility. The researches of photovoltaic sysem however have been limited to the photovolataic system itself and the partial influences to a distribution system when the photovoltaic systems are interconnected with it. But the influences on the whole power systems have not been researched yet.
When the photovoltaic systems are distributed as dispersed generation systems, it is necessary to investigate the distributed insolation on the electric power service area for researching the influences of photovoltaic systems. Therefore we have approached to estimate area insulation distribution from the measured insolation data on the specific points. As the result, we have obtained a good prospect by this estimation approach.
