Electricity Quality Analysis of Teuri-Yagishiri Island Microgrid

On Teuri Island and Yagishiri Island, in Haboro, Hokkaido, local production for energy consumption has become a challenge from the points of view of fuel transportation and conservation of local environment. Due to this, the "Eco Island Concept Demonstration Project" was launched and the introduction of renewable energy is being considered. This study aims at developing an optimal clean energy system on Teuri Island and Yagishiri Island. In this paper, the study of the optimization of the installed capacity and the suppression of frequency variation in the microgrid comprising these two islands was performed. For the optimization of the infrastructure capacity, the objective function of the economics of the system was considered, and the most economically advantageous system with the less environmental impact was found. Because frequency and voltage fluctuations in the system can increase by the introduction of renewable energy, we analyzed the frequency variation and the voltage variation of the Teuri-Yagishiri Microgrid. Then, we considered the introduction of a limited amount of renewable energy.