A wind-solar hybrid system was usually comprised of wind
turbine, photovoltaic (PV) modules, controller, inverter and
batteries. The major advantage of the hybrid system is that its
reliability is enhanced compared with the simple wind energy
system or solar energy system [5,6]. The research on wind-solar
hybrid system mainly focuses on the modeling for system configuration,
optimal matching between wind turbine and PV modules
[7e11], as well as simulation of power output [12e15]. Nema [16]
analyzed the future development of renewable systems and the
acceptance by users. Celik [5] presented the techno-economic
analysis of wind-solar system using different sizing method