Abstract
Photovoltaics(PV) system is expected to play an important part in electricity supply as a clean and renewable power source. But, because of the unstability and uncontrollability of the output of PV system, its economic value is significally decreased as a power source. One way to improve the economic value of PV system is to combine the system with a storage facility. We evaluated the economic value of the storage facility which is optimally managed in conjunction with PV systems.The probabilistic relationship between electricity demand and the output of PV system is also considered.
The results quantitaitively show that the main factor to determine the economic value of storage facility is its contribution in cutting the peak of electricity demand. The dependance of the economic value on the load profile and the capacity of PV systems is also examined.
