Charge Management of Electric Vehicles from Undesired Dynamics in Solar Photovoltaic Generation

Abstract

Power generation from photovoltaic solar systems contributes to mitigate the problem of climate change. However, the intermittency of solar radiation affects power quality and causes instability in power grids connected to these systems. This paper evaluates the dynamic behavior of solar radiation in an Andean city, which presents rapid power variations that can reach an average of 7.20 kW/min and a variability coefficient of 32.09%. The study applies the ramp-rate control technique to reduce power fluctuations at the point of common coupling (PCC), with the incorporation of an energy storage system. Electric vehicle batteries were used as the storage system due to their high storage capacity and contribution to power system flexibility. The application of the control strategy shows that, with a minimum of five electric vehicle charging stations at the PCC, the rate of change of the photovoltaic can be reduced by 14%.

Heterogeneous Communication Network Architecture for the Management of Electric Vehicle Charging Stations: Multi-Aggregator Management in Microgrids with High Photovoltaic Variability Based on Multiple Solar Radiation Sensors

“…These oscillations were identified as variations that fall within a range oscillating between 54% and 72% of the nominal capacity of the installation. Additionally, when examining the direct current component of the generated power, it was observed that variations in the solar system occur at intervals on the order of 15 s [ 16 ], with peak values of 800 Wm −2 /min and an average of 275 Wm −2 /min (see Figure 1 ). The data correspond to the 35 kWp PV generator from the Microgrid Laboratory at the Balzay Campus of the University of Cuenca, Ecuador.…”