An Advanced Robust Noise Suppression Control of Bidirectional DC-DC Converter for Fuel Cell Electric Vehicle

This article focuses on improving the power quality of a 1-kW fuel cell electric vehicle (FCEV), especially the robustness and noise suppression of the system. A bidirectional floating-interleaved buck-boost dc-dc converter (FIBDC) is used to enable the charge and discharge control of energy storage devices, such as batteries. To reduce the current ripple, a novel sliding mode control (SMC) is proposed by using hyperbolic tangent function (tanh). Compared with conventional SMC, the proposed tanh-function based-supertwisting SMC (TST-SMC or TST) can not only suppress the chattering problem caused by highly nonlinear feedback but also suppress the oscillation caused by the control lag. In addition, the convergence conditions of each control loop are analyzed for improving the robustness and rapidity of TST, as well the smoothness. In order to verify the effectiveness of the proposed control algorithm, simulations and experiments are conducted under PI, supertwisting (ST), and TST control, respectively. The results indicate that the proposed control can guarantee the strong robustness and fast dynamics of bus voltage, and also the excellent suppression for system noise.