Evaluation of Distributed Generation and Storage Facility Installation using a Hierarchical Structure Model of Power Transmission and Distribution Equipment

The limited reserves of fossil fuels and environmental concerns have increased the interest in renewable energy. Actually, rapid advancement in the technology for utilization of renewable energy distributed generation is bringing opportunities of participating in power systems with financial assistance. However, there is much what remains only in performance evaluation of the renewable resource distributed generation, and it is often decient in consideration of the reliability of power systems. And verication about substitution of power transmission and distribution equipment capacity by distributed generation is inadequate. In particular, increase in equipment capacity of the low voltage class is not reflected in conventional evaluation. Recently, combined use of storage facility is practical because the economic conditions are improved and supply reliability will be secured.

In this report, we built a hierarchical structure model that considers explicitly several voltage classes of power systems in order to overcome these diculties, and analyzed potential of distributed renewable power generation and storage facility installation. As the result, the complementary role of electricity storage facility with intermittent renewable power generation was verified.