Solar Based electric vehicle charging station using MATLAB Simulink

Abstract

MATLABSolutions demonstrate In this particular task, step-by-step guide In this Solar ev chargingwith MPPT (Maximum Power Point Tracking) refers to the process of efficiently ev charginga battery or power system using solar panels and an MPPT charge controller. MPPT technology maximizes the power output from solar panels by continuously tracking and adjusting the operating point at which the panels produce maximum power.

Dc-Dc converter

The DC-DC converter transforms a source of DC input voltage into a higher or lower source of DC output voltage. A PV array has a higher voltage than a battery does, so For applications involving solar PV charge controllers, the buck topology is frequently used [14–16]. The buck converter functions as a regulator to reduce the PV array's input voltage while keeping the power delivery for battery charging. Stepping down the input voltage and raising the output current provided to the battery accomplish this. As illustrated in Fig. 1, the buck converter circuit comprises of an input and output capacitor, a Schottky diode, a high power inductor, and a MOSFET switching device. To stop the flow of reverse current through the reverse blocking diode D1, the PV array from the battery during night time. The MOSFET Ron is set to 0.02 Ω and the Schottky diode D2 forward voltage is set to 0.5 V. The MOSFET is switch by a pulse generator with 1000 Hz switching frequency. The output voltage of the buck converter can be determined by the ratio between Vout the output voltage and Vin the input voltage of buck converter (1) where D is the duty cycle of the PWM signal

Battery charge controller

The PV array source's effective input resistance, which is necessary for MPPT to work, can also be determined by duty cycle. In (2), where Rload is the load resistance or battery resistance and D is the duty cycle, the effective input resistance Rin perceived by the source can be calculated.MPPT. The battery is charged at a constant voltage during the second stage of constant voltage charging, which is also known as absorption charging. MPPT is disabled during this step. When the battery is fully charged, the third stage float charge merely keeps the State of Charge (SoC) at 100%. This is done to avoid a battery gassing reaction and overheating from an excessive, unchecked charge that is over 100%.