Q$4$ A power station has three generation units whose details are in Table $1.$

Determine: $-$

$($a$)$ The Priority List Order.

$($b$)$ The unit commitment combinations with minimum and maximum loads.

Q$5($a$)$ Determine how the units in Q$4$ should optimally share a load of $1,000$ MW$.$

$($b$)$ What is the cost when the units share the load optimally?

$($c$)$ What is the cost when units $1$ and $2$ are loaded st $400$ Mw each and Unit $3$ at $200$ MW$?$

$($d$)$ What is the saving when the units are loaded optimally?