In the electric industry, baseload refers to the minimum level demand over 24 hours. The baseload is generally about 30 – 40 % of the peak load. Traditionally the baseload has been served by low cost power generators, operating steadily and continuously.
Coal fired power plants, nuclear, and (depending on geography) hydro have been the backbone of baseload generation. Operating in “baseload mode” is more or less a prerequisite for nuclear and coal-fired power plants. That is because of their high fixed costs and need to run due to long start-up times and limited ability for load-following.
This paradigm has started to change.
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