Enhanced Battery Longevity in EV Fast Charging with Based Active Damping in DAB converter

Abstract

The Dual Active Bridge (DAB) converter is well adapted for DC micro grid- connected EVCS applications as well as off-board rapid EVCS. However, since the charging current is quite strong and any oscillations would impair the EV battery life, careful adjustment of the DAB converter architecture is essential for rapid charging. According to published research, EV battery charging using a DAB converter architecture combined with a series inductor at the output lowers output current ripple by 40%. However, we have found that adding an LC filter to the system introduces potentially unstable dynamics. Since this impacts the stability of the controller, active or passive damping is required to reduce these dynamics. The significant losses that passive damping generates, which are partially caused by switching-frequency noise and partially by low-frequency noise, make it less effective. It is also quite difficult to place the dampening at the selected resonant frequency. The most used control algorithm in industry is proportional integral derivative (PID) control, which is well recognized in the field of industrial control. PID controllers' wide spread use may be ascribed in part to their reliable operation under a variety of operating situations and in part to their as of use, which enables engineers to run them withease. In this current study in addition to the existing system we are using PID controller as extension for checking the simulation results.