Feasibility analysis of an islanded hybrid wind-diesel-battery microgrid with voltage and power response for offshore Islands

Practically feasible and applicable design of a hybrid micro-grid wind-diesel alternative energy system has been demonstrated to get the results to fulfil the load demand of 115 kWh/d and a peak load of 11.2 kW for a small community of Mersing town, Malaysia. The whole optimization process has been conducted with the consideration of meteorological data and the technical specifications of each module by the proper utilization of the iHOGA renewable energy software, DIgSILENT PowerFactory and Matlab Simulink. From the simulation results, it can be observed that the designed and simulated Islanded Hybrid Microgrid System (IHMS) is economically and environmentally feasible, and the simulation results reported as the net present cost, cost of energy and CO2 emission, are being reduced by about 72%, 73.5% and 82% respectively per year compared to the conventional power plant of the Tanjung Bin Energy Power Plant, Johor, Malaysia. Moreover, the voltage, power and frequency responses also checked and compared with the practical results and ensured the stability of the whole energy system. Besides this, the system reliability indices also analysed and reported to ensure the technical and economic feasibility of the designed system. The optimization results reported that the least cost of energy is about USD 0.05/kWh and the net present cost is USD 77,286. The comparison between the analysed hybrid energy system and conventional energy systems has been reported properly to justify the importance of renewable energy resources all over the world. This optimized combination of the hybrid alternative energy system will be applicable for all other locations in the world with similar meteorological and environmental conditions.