Power Allocation of Multi-Stack Fuel Cells in an Electric-Hydrogen Hybrid Storage System for a Wind Farm Under a Dispatch Strategy

Le résumé fourni par la source

To tackle the challenges of low system efficiency and irrational operating hours in electric-hydrogen hybrid storage systems, stemming from the constrained output of single fuel cell stacks, this paper constructs a hierarchical energy management strategy. The upper layer employs a Model Predictive Control (MPC) based controller to optimally schedule the power of the hybrid system, with the objectives of ensuring precise grid command tracking and maximizing wind power consumption. In the lower layer, a controller based on the Rotary Daisy Chain (RDC) algorithm allocates the total power reference from the upper layer among individual stacks. This distribution is based on the efficiency-power characteristics and operating conditions of each stack, generating precise commands for their start-stop and power output. The simulation results validate that the proposed hierarchical strategy can effectively mitigate wind power volatility and ensure accurate tracking of dispatch schedules, limiting the wind curtailment rate to 3.43%. Furthermore, it boosts the operating efficiency of the multi-stack system and markedly improves the degradation consistency among fuel cells by dynamically balancing their loads, thereby reinforcing the longterm operational stability of the system.

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