Question

The incremental cost curves in Rs/MWhr for two generators supplying a common load of 700 MW are shown in the figures. The maximum and minimum generation limits are also indicated. The optimum generation schedule is:

• A. Generator A: 400 MW, Generator B: 300 MW
• B. Generator A: 350 MW, Generator B: 350 MW
• C. Generator A: 450 MW, Generator B: 250 MW
• D. Generator A: 425 MW, Generator B: 275 MW

Answer 1

The correct option is C Generator A: 450 MW, Generator B: 250 MW

Maximum incremental cost in Rs/Mwhr for generator A = 600(at 450 MW)

Minimum incremental cost in Rs/Mwhr for generator B = 650 (at 150 MW)

As maximum value of incremental cost of A is less than minimum value of B.

$\therefore$ Generator 'A' will operate at its maximum (o/p) 450 MW and B at (700 - 450) = 250MW