Method to control battery-backed hybrid power system in a fuel cell electric vehicle

Abstract

A method and system for controlling a hybrid power system comprising a plurality of energy sources includes obtaining, by at least one processor, a plurality of state variables associated with the hybrid power system, determining a reference value for each of the state variables, and computing an error vector representing a difference between the state variables and the reference values. An integral sliding surface is generated using the error vector, and at least one control input for respective power converters is determined based on the sliding surface and a system model of the hybrid power system to cause the state variables to converge to the reference values within a fixed time independent of initial conditions. The at least one control input is applied as pulse width modulation signals to regulate distribution of energy, thereby maintaining a stable DC bus voltage and ensuring real-time operation.