A Strategic Approach in order to Design an Optimal Multi-charger System including Distributed Generations and Storage Systems

Recently, the need for a potential source of energy instead of fossil fuels arises, as fossil fuels make environmental problems. Also, fossil fuel cost depends on economic issues all around the world. The sustainable energies, such as wind and solar, which are unlimited and widespread and could be a suitable alternative to fossil fuels. The advent of sustainable energy resources laid a good foundation for the entrance of plug-in electric vehicles (PEVs) into the system. In order to obtain an optimal utilization of distributed generations, it is mandatory to study the objective functions and constraints comprehensively. The main problem of sustainable distributed energy resources is their uncertainty of output power. This paper is aimed to solve the aforementioned problem with a novel strategy in which a hybrid utilization of distributed generations along with storage systems is used. The proposed strategy could increase the reliability and damp the output power excursions. The main renewable energy producers in this work are wind turbine and solar panels. In this paper, an optimum strategy for the PEV’s operation is presented while there are some other distributed generations and storage systems. The objective function consists of system life-cycle cost and active power losses. Further, some constraints like equality constraint, practical constraints, power exchange constraint with upper-part sub system are taken into consideration. The practical system case study is done in a region of Kermanshah province, Iran, when there are single-charge station, multi-charge station, and a smart public park. Also, the weather information from this region is used in the simulation. This study is conducted by MATLAB framework and Genetic Algorithm (GA) in different scenarios. The simulation results prove while the system operator purchases the maximum power, the total cost of power supply will decrease. Furthermore, when the system utilizes solar panels, the system operation is more optimum in comparison to the case in which wind power generation is existed. This result comes from a fact that the maintenance cost and investment cost of wind turbines are bigger than those of solar panels. In this paper, in order to assess the economic aspects of the proposed strategy, some economic factors, for example capital recovery factor, the income of recovery value, and the current value inflation.

Keywords:

Storage Systems , Multi-Charger , Electric Vehicles