Abstract
In recent years, the concept of hybrid energy systems (HESs) is drawing more attention for electrification of isolated or energy-deficient areas. When optimally designed, HESs prove to be more reliable and economical than single energy source systems. This study examines the feasibility of a combined dispatch (CD) control strategy for a photovoltaic (PV)/diesel/battery HES by combining the load following (LF) strategy and cycle charging (CC) strategy. HOMER software is used as a tool for optimization analysis by investigating the techno-economic and environmental performance of the proposed system under the LF strategy, CC strategy, and combined dispatch CD strategy. The simulation results reveal that the CD strategy has a net present cost (NPC) and cost of energy (COE) values of $110,191 and $0.21/kWh, which are 20.6% and 4.8% lower than those of systems utilizing the LF and CC strategies, respectively. From an environmental point of view, the CD strategy also offers the best performance, with CO2 emissions of 27,678 kg/year. Moreover, the results show that variations in critical parameters, such as battery minimum state of charge, time step, solar radiation, diesel price, and load growth, exert considerable effects on the performance of the proposed system.
Highlights
Progressive energy demand growth and rapid depletion of fossil fuels have raised concerns of future energy supplies [1]
The utilization of conventional energy sources from fossil fuels has resulted in tremendous increases in CO2 emissions, which are the primary cause of global warming [2,3]
Optimization of energy sources is a critical key in the assessment of the feasibility of hybrid energy systems (HESs)
Summary
Progressive energy demand growth and rapid depletion of fossil fuels have raised concerns of future energy supplies [1]. The atmospheric CO2 concentration has increased by approximately 40% compared with that at the beginning of the industrial revolution [4]. These issues have led to the determination of alternative energy sources with the potential to reduce pollution and produce a sustainable energy supply [5]. The major drawback of RESs is the unpredictable and intermittent nature of power generation. This issue can be overcome by integrating different energy sources to produce a hybrid energy system (HES), which can solve reliability problems
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