ECO-FRIENDLY ENERGY SYSTEM DESIGN FOR AN ISOLATED ISLAND : A CASE STUDY OF GASADO, KOREA

摘要

An eco-friendly energy-isolated island system is designed to supply electricity using a renewable energy source if power supply is not stable. A microgrid for isolated island construction refers to a small and self-supporting grid that produces and supplies electricity through an energy source. The main advantages include the self-sufficiency of power and the use of storage systems to ensure that supplies are safe and stable. Recently, the use of microgrid projects is expanding globally. In particular, South Korea is gradually expanding its isolated island business through microgrid construction in in accordance with current government's policy of energy conversion and reducing the dependence on coal and nuclear energy. However, when analyzing the economic feasibility with existing isolated island models, the following problem is revealed: the power amount of renewable energy actually used and the economic benefit are low. In this study, we constructed an isolated island model that is newly optimized based on renewable energy sources, including the Energy Storage System(ESS) in the Jindo Gasado Island area in Korea. First, we investigated the regional and environmental characteristics of the area, the power load pattern, and the generator specifications of the renewable energy generation system linked with the ESS. Also, the economics and feasibility evaluation were performed quantitatively based on the simulation of each generation source and the operating costs during the project period. Currently, the existing independent island model operates a renewable energy generation plant and a diesel generation plant together. However, the newly constructed isolated island model is constructed to enable the supply of power using 100% of the renewable energy source. In addition, the effect of reducing greenhouse gases was confirmed by considering the emission of air pollutants such as carbon dioxide, as a cost.