- Dec 7, 2021 12:12 pm GMT
This commentary provides a simplified overview of the process of replacing a single dispatchable powerplant with either wind or solar generation plus storage.
The powerplant to be replaced is a 1,000 MW plant, either coal or nuclear fueled. This powerplant would be capable of generating 24,000 MW Hours (MWH)of power per day as a baseload powerplant. Replacing its nameplate generating capacity with 2.5 MW onshore wind turbines would require installation of 400 turbines. However, even assuming very favorable siting, the wind turbines would be expected to generate at approximately 40% of their nameplate rating throughout the day, so replacing the generation capability of the 1,000 MW dispatchable powerplant would require 1,000 wind turbines. However, the instantaneous output of those wind turbines could vary between 2,500 MW and 0 MW throughout the day. Therefore, dispatchable storage would be required to stabilize the output of the storage supported wind farm at 1,000 MW for baseload service. Storage capacity of 10,000 – 15,000 MWH would be required to stabilize facility output and render it dispatchable, depending on characteristic wind conditions.
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