Assessment of Economic and Environmental for a Hybrid Energy System in Sebesi Island, South Lampung, Indonesia

The use of new and renewable energy in the supply of electrical energy is something that needs to be considered. The use of fossil energy such as coal and diesel will contribute to a very large level of emissions that can lead to an increase in global warming. But on the other hand, investment for the construction of new and renewable energy generators is still relatively expensive. To reduce losses on investment costs, it is necessary to study the locations where new and renewable energy plants will be built. Sebesi Island is one of the most remote islands in Indonesia and has beautiful beaches and extraordinary natural resources. However, currently, the supply of electrical energy is still using diesel generators. Higher fuel prices and shipping costs, increasingly scarce fossil energy sources and the resulting environmental effects are the factors behind this study. Options for non-fossil energy use need to be considered. This study examines the economic and environmental feasibility. The software used is HOMER with 3 scenarios, namely: Case 1: three diesel generators or existing generators (3DG) as the base case, case 2: 3DG-PV-WT hybrid, and case 3: 3DG-PV-WT-BAT hybrid. The simulation results based on an economic review show that case 3 has the lowest net present cost (NPC) and level of cost energy (COE) values, namely USD 912,180 and 0.281, respectively. These two parameters were able to reduce respectively 29.29 % and 29.22% of the base case. Meanwhile, from the environmental aspect, it shows that case 3 also has a very superior performance. This case can reduce gas emissions by 68 %. This means that case 3 is very feasible economically and environmentally to be implemented in Sebesi Island, Indonesia in the future.