This paper recommended an optimal design model for designing stand-alone hybrid solar-wind-diesel systems. The optimum configuration ensures that the annualized cost of the systems is minimized while satisfying the load demand for 5-year period from 1996 to 2000, result in zero load rejection with minimum cost. The eight decision variables included in the optimization process are the PV module number, PV module slope angle, wind turbine number, wind turbine installation height, battery number, diesel generator (DG) power, DG starting and stopping points. The objective function (annualized cost of system) minimization is implemented by using genetic algorithms, which has the ability to achieve the global optimum solution with relative computational simplicity.
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