Voltage Regulation in Polymer Electrolyte Fuel Cell Systems Using Gaussian Process Model Predictive Control

This study presents a novel approach using Gaus- sian process model predictive control (MPC) to stabilize the output voltage of a polymer electrolyte fuel cell (PEFC) by regulating hydrogen and airflow rates. Two Gaussian process models capture PEFC dynamics, accounting for constraints like hydrogen pressure and input change rates to reduce predictive control errors. The performance of the physical model and Gaussian process MPC in handling constraints and system inputs is compared. Simulations show that the proposed Gaussian process MPC maintains the voltage at 48 V while adhering to safety constraints, even with workload disturbances from 110-120 A. Compared to traditional MPC with detailed system models, Gaussian process MPC has similar overshoot and slower response time but requires less system information and no underlying true system model.