The start-up costs and shut-down costs of the four units are mentioned below: Unit No Start-Up Cost ($)
Shut-Down Cost ($) 1 2500 1500 2 3000 1200 3 3400 1000 4 2600 1400 Assume that the demand during
the second interval of the day is expected to increase from 1400 MW to 1500 MW due to a prediction
error. The Unit 1 and Unit 2 are must run units and also the system load at the first stage and the final
stage are to be met only using the must-run units. Determine the optimal unit commitment policy to
serve the system load.