Carbon dioxide is one major component of greenhouse gases and is mainly caused by fossil fuels combustion.Renewable energy provides a great substitution for traditional fossil fuels because of its environmental friendness and high abundance. The deployment and application of renewable energy resources is, therefore, of great significance for improving the decarbonization and availability of island’s power system. In order to address the problems caused by fluctuation features of renewable energy power generation, the utilization of energy storage measures has been increasingly proposed in recent years. This article takes the Liugong island, which is located in the Yellow Sea, as a study case and constructs an off-grid hybrid renewable energy system for this 3.15 km2 islands. Hybrid Optimization of Multiple Energy Resources (HOMER) model based on multi-objective optimization is applied to conduct the technologyeconomic- environmental analysis of proposed renewable energy systems equipped with different energy storage modes. Major simulation results demonstrate that the cost of energy, the net present cost, and the reduction rate of carbon dioxide emissions for two alternative systems are 0.191 $/kWh, 7.0 million, 89.9% and 0.293 $/kWh 10.8 million, 47.6%, respectively. According to the simulation results, hybrid renewable systems with battery storage methods perform higher feasibility at current stage.
Keywords renewable energy; off-grid; energy storagemodes; carbon dioxide emissions