Robust nonlinear control of battery electric vehicle charger in grid to vehicle and vehicle to grid applications

The battery electric vehicle (BEV) charger provides an effective two-way interconnection between the grid and the vehicle in both grid to vehicle (G2V) and vehicle to grid (V2G) configurations. However, the control of power flow in either of the configurations is a challenging task. In this study, a supertwisting sliding mode-based controller (ST-SMC) is designed for the control of the bi-directional power converter in a BEV charger for tracking the desired current and output voltage of the charger in both G2V and V2G operations. The proposed controller reduces the chattering effect, which is a major drawback in power converters. The robust integral backstepping controller (IBS-SMC) is also designed in this paper for comparison purposes. The stability of the system is analyzed using the Lyapunov stability criterion. The proposed controllers are simulated in Matlab/Simulink environment. The proposed controller shows better dynamic performance as compared to the IBS-SMC controller. Hardware in loop (HIL)-based experimental verification has been done by using the Delfino F28369D dual core microcontroller in order to prove the effectiveness of the proposed controller. •Robust nonlinear control of DC–DC bidirectional conversion in BEV charger is proposed.•The proposed framework ensures the regulation of current and voltage in G2V and V2G modes.•To safely battery charge and discharge in G2V and V2G modes is ensured in the presence of external disturbance.•Hardware in loop-based test validates the designed controller.