Optimal control method for cathode gas supply system of pemfc based on maximum net power output

Abstract

The present application relates to a kind of PEMFC cathode gas supply system optimization control method based on maximum net power output, belong to fuel cell field, this method includes: establishing PEMFC cathode gas supply system mathematical model;Based on the PEMFC cathode gas supply system mathematical model, according to current load current variation, the optimal peroxide ratio and optimal cathode pressure corresponding to the PEMFC cathode gas supply system are obtained, and maximum output net power-peroxide ratio-cathode pressure optimization table is established;According to the coupling relationship between the peroxide ratio and the cathode pressure, the transfer function matrix identified, according to the transfer function matrix design the feedforward decoupling controller of the centrifugal air compressor voltage and the back pressure valve opening degree, realize the peroxide ratio supply and the cathode pressure control.The present application can be realized in maximum net power closed loop control, while the PEMFC cathode gas supply system obtains faster response speed and smaller overshoot.

Images