A transmission line has a 10% distribution factor. If 200 MW is scheduled from Bus "X" to Bus "Y", how much of that will flow on line "A-B"?

To determine how much of the scheduled 200 MW from Bus "X" to Bus "Y" will flow on transmission line "A-B," one needs to apply the concept of the distribution factor. The distribution factor indicates the proportion of a scheduled transfer that will actually flow over a particular transmission line. In this case, a 10% distribution factor means that only 10% of the power transfer from Bus "X" to Bus "Y" will pass through line "A-B."

To calculate the flow, you multiply the amount of power being transferred (200 MW) by the distribution factor (10%), which can be expressed mathematically as:

Flow on line A-B = Scheduled power × Distribution factor

So, we have:

Flow on line A-B = 200 MW × 0.10 = 20 MW

Thus, 20 MW of the scheduled 200 MW will flow on line "A-B." This direct calculation confirms that the correct answer is indeed that 20 MW will flow on this specific transmission line.