If a generator trip causes the frequency to drop to 59.940 Hz and the Frequency Bias is 200 MW/0.1 Hz, how much MW will the system provide for frequency support?

To determine how much megawatts (MW) the system will provide for frequency support in response to a frequency drop, we need to use the concept of frequency bias. Frequency bias is a measure of how much power is added or removed from the grid for every 0.1 Hz change in frequency.

In this scenario, the frequency drops to 59.940 Hz from the nominal 60 Hz, which represents a change of 0.060 Hz (or 0.1 Hz reduction from the nominal frequency). Given the frequency bias of 200 MW/0.1 Hz, we can first establish how this bias applies to the change in frequency.

Since the frequency drop is 0.060 Hz, we calculate the MW provided for frequency support by using the following formula:

Support MW = Frequency Bias × Change in Frequency.

Substituting in the given values:

Support MW = 200 MW/0.1 Hz × 0.060 Hz

Calculating this gives:

Support MW = 200 MW × (0.060 / 0.1)

Support MW = 200 MW × 0.6

Support MW = 120 MW.

Thus, when a generator trips and the frequency drops by 0.