Bidirectional Power Control of Solar PV array and DABs Based Charger for Electric Vehicles

Abstract

In the upcoming years, the electric vehicles (EVs) are turn out to be essential component of transportation. The bidirectional DC-DC converter topology along with solar PV array is proposed for the charging and discharging process of the electric vehicle (EVs) battery pack with an improved efficiency. The dual-active bridge (DAB) converter is used here which is having a unique feature like high power density, zero voltage switching and high efficiency. Moreover the phase shift modulation (PSM) technique is used in order to get the required output voltage level at the battery side. The converter consists of two full bridges working as converter/ inverter modes of operation according to the requirement. Here, there is intentionally a phase shift provided between the primary and secondary bridges of converter to control the power flow. The current control algorithm with a PSM technique is implemented to produce the switching pulses for the front-end converter that gives accurate control as compared to proportional integral (PI) controller based technique. The DAB with a high frequency isolating transformer is modelled and designed to operate in both the directions. The control algorithm and performance of the charger are evaluated by the MATLAB and Simulink based platform and correspondingly simulation results are obtained.