Absolutely, as long as a the energy of a wind farm displaces enough MWh of gas to cover its capital costs (incl. network costs) at the marginal price of gas it should reduce system costs. But wind energy output across an area the size of the UK is so highly correlated that additional wind capacity has diminishing returns. I suspect that the UK is already beyond the point by which additional wind is economically beneficial, but I’m not certain about that.
Also, if gas utilization falls dramatically capital costs will come to dominate. It’s not just the turbines, the gas network is costly.
Also, if gas utilization falls dramatically capital costs will come to dominate. It’s not just the turbines, the gas network is costly.