An Investigation of Heuristic Control Strategies for Multi-Electrolyzer Wind-Hydrogen Systems Considering Degradation

Zachary Tully, Genevieve Starke, Kathryn Johnson, Jennifer King

Research output: Contribution to conferencePaper

Abstract

With the growing demand for renewable-energy-powered hydrogen generation and the corresponding increase in plant capacity, individually controlling many electrolyzer stacks will be critical for increasing the plant's lifetime and efficiency. This paper introduces a rule-based controller framework targeting electrolyzer degradation to explore the opportunity space in multi-stack hydrogen plant control. A novel control-oriented degradation model is also presented in this work, which quantifies the impact of steady power input, fluctuating power input, and the number of startup/shutdown cycles on electrolyzer degradation. Using a wind power input signal, 13 controller configurations are tested on 5 MW hydrogen plants consisting of 2, 5, 10, and 25 stacks. These configurations are evaluated on their capability to mitigate electrolyzer degradation and efficiently produce hydrogen from the time-varying input power. The results show that multi-stack control for degradation can extend the plant's lifetime by more than a factor of 3 with minimal impact on instantaneous hydrogen production.
Original languageAmerican English
Pages817-822
Number of pages6
DOIs
StatePublished - 2023
Event2023 IEEE Conference on Control Technology and Applications (CCTA) - Bridgetown, Barbados
Duration: 16 Aug 202318 Aug 2023

Conference

Conference2023 IEEE Conference on Control Technology and Applications (CCTA)
CityBridgetown, Barbados
Period16/08/2318/08/23

NREL Publication Number

  • NREL/CP-5000-86416

Keywords

  • control
  • degradation
  • hydrogen
  • multi-stack
  • PEM
  • scheduling

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