Abstract
This paper proposes a new methodology to assess the economy on the photovoltaic power plant of utilities in an isolated island, where the photovoltaic power is of great advantage since the scale of power system is small and the generating costs of existing plants are high. For this purpose we have developed the method of calculating the capacity credit and the energy credit for photovoltaic power plant by the hourly computer simulation using the standard meteorological data and the daily peak load duration period of the island.
Further we have estimated the allowable generating cost of the photovoltaic power plant by using the capacity and energy credit described above. The economy of photovoltaic power plant is determined by comparing the allowable generating cost with the actual generating cost.
We lastly try to assess the economy of the photovoltaic power plant which would be installed in a certain isolated island in Okinawa.
