A Multi-model Method to Assess the Value of Power-to-Gas using Excess Renewable

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Abstract

Power-to-Gas (P2G) is a process that produces a gas from electricity, which is most commonly hydrogen via electrolysis. While some studies have considered hydrogen as a power-to-power storage vector, it could also be used as a fuel across the energy system, for example for transport or heat generation. Here, two energy models are used to explore the potential contribution of P2G as a cost-effective source of hydrogen, particularly for future energy systems with high variable renewable energy (VRE) in which there are occasional periods when electricity supply exceeds demand. A detailed electricity system model is iterated with a multi-vector energy system model using a soft-linking approach. This iterative approach addresses shortcomings in each model to better understand the optimal capacity of P2G and the potential economic capture rate of excess VRE. The modelling method is applied to Great Britain in 2050 as a case study. A substantial proportion of excess VRE in 2050 can be captured by P2G, and it is economically competitive compared with alternative sources. Moreover, the effectiveness and economic viability of P2G for reducing excess renewable is robust at even very high levels of renewable penetration.
Original languageEnglish
Pages (from-to)9103-9114
Number of pages25
JournalInternational journal of hydrogen energy
Volume47
Issue number15
Early online date17 Jan 2022
DOIs
Publication statusPublished - 19 Feb 2022

Keywords

  • integrated energy systems
  • power-to-gas (P2G)
  • energy system modelling
  • power system modelling
  • hydrogen economy
  • renewable integration
  • UK TIMES Model

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