Optimal sizing of a stand-alone hybrid system for south-west of Iran-case study

in this paper, size of stand-alone system is optimized. Hybrid system is consisting of three major power sources: wind turbine generator, photovoltaic arrays, and storage batteries that the characteristics of components are commercially available. This study is performed for the region in southwest of Iran. The optimization problem is subject to economic and technical constraints. System costs involve investments, replacements, and operation and maintenance as well as loss of load costs. The technical constraint, related to system reliability, is expressed by the equivalent loss factor. The reliability index is calculated from component’s failure, that’s including of wind turbine, PV array, battery, and inverter failure. in this study, size of components for three configuration systems are calculated and they are compared with each other. Finally, hybrid system is selected as the best configuration that has minimum costs and can satisfy the constraints. PSO algorithm is used for optimal sizing of system’s components.

Keywords:

Photovoltaic , Wind turbine , Reliability Index , Renewable energy , Stand-alone system , Particle swarm optimization