Solar Charging Station for Electric Vehicles in Shopping Malls

Design, dimension and model the photovoltaic system connected to the grid to provide the energy required to charge electric vehicles. Evaluate the technical and economic feasibility of the solar charging station for electric vehicles in shopping malls.

In this article, we present the design, sizing and modelling of a grid-connected solar charging station for recharging electric vehicles in shopping malls. The applied method consists of an analysis of the solar resource available at the location of the shopping mall, as well as the analysis, evaluation and selection of the components of the grid-connected photovoltaic system with the support of simulation software such as PVsyst and Helioscope, as well as analysis, evaluation and selection of the components of the charging points of electric vehicles and finally the economic analysis of the solar charging station in the shopping mall.

The specific output photovoltaic energy where the shopping center is located is 1,435 kWh/ kWp, the optimal inclination of the photovoltaic modules is 12°, the month with the lowest irradiation is the month of July and peak solar hours (HSP) equals 4.24. The plant factor is 17.32%, the energy produced is 135,675 kWh and the specific production 1,443 kWh/kWp. Eight 11 kW Wallbox chargers are considered for charging electric vehicles. The energy consumed since 9:00 a.m. until 06:00 p.m. equates to 576 kWh, while the energy consumed since 06:00 p.m. until 09:00 p.m. equals 192 kWh. The photovoltaic system connected to the grid provides 50% of the energy consumed during 09:00 a.m. until 06:00 p.m. which is equivalent to 288 kWh. The energy consumed in the course of the day is estimated to be 768 kWh. 03 photovoltaic generators with individual power of 31,350 Wp will be required. Considering 330 Wp polycrystalline photovoltaic modules, each one will be made up of 95 photovoltaic modules, distributed in 5 chains of 19 photovoltaic modules. 03 three-phase inverters for grid interconnection of 27 kW-380/220 VAC are required, with their respective Smart Meter 50 kA-3. The conventional three-phase substation for grid connection must have a 250 kVA-10- 22.9/0.38-0.22 kV encapsulated dry transformer. For the analysis, the inverters are considered as a load, and a power factor of 0.85. The annual energy produced amounts to 142,708 kWh.

Author(s): César Alfredo Peña Ramos

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