Storing renewables in the gas network: modelling of power-to-gas seasonal storage flexibility in low-carbon power systems

摘要: The power-to-gas (P2G) process, whereby excess renewable electrical energy is used to form hydrogen and/or synthetic natural gas (NG) that are injected, transported, and stored in the network, has prospect become an important flexibility option for seasonal storage of low-carbon electricity. This study first model assess potential P2G when combined with operation accounting two networks' characteristics constraints (including amount can be blended NG under different network conditions). Power system analysed via a two-stage optimisation based on DC power flow production from otherwise curtailed renewables, also considering impact short-term long-term prices. Additionally, its potentially required re-dispatch evaluated steady-state model. Case studies conducted Great Britain transmission networks quantify benefits limitations integrated usage scenarios. proposed thus sets fundamentals further development this emerging technology as systems.