Given a system frequency of 60.00 Hz and a frequency bias setting of 100 MW/0.1 Hz, what is the ACE if the Net Actual Interchange is +100 MW?

Given a system frequency of 60.00 Hz and a frequency bias setting of 100 MW/0.1 Hz, what is the ACE if the Net Actual Interchange is +100 MW?

• A. -100
• B. 0
• C. 10
• D. 100

Answer: (A)

The correct answer is -100 MW for the Area Control Error (ACE) in this context. To understand why this is the case, we can break down the components involved in calculating ACE. ACE is determined by the formula: ACE = Net Actual Interchange (NAI) - Frequency Bias (FB) * (System Frequency - Nominal Frequency) In this scenario, you have: - System Frequency = 60.00 Hz - Nominal Frequency = 60.00 Hz (standard frequency for grid operation) - Frequency Bias = 100 MW/0.1 Hz - Net Actual Interchange = +100 MW Now, plugging in these values: 1. **Calculate the frequency deviation:** Frequency Deviation = System Frequency - Nominal Frequency Frequency Deviation = 60.00 Hz - 60.00 Hz = 0 Hz 2. **Calculate the impact of frequency bias:** Frequency Bias Impact = Frequency Bias * Frequency Deviation Since the frequency deviation is 0 Hz, the calculation for the frequency bias impact also results in 0 MW. 3. **Substituting into the ACE calculation:** ACE = NAI - Frequency Bias Impact ACE = +100

The correct answer is -100 MW for the Area Control Error (ACE) in this context. To understand why this is the case, we can break down the components involved in calculating ACE.

ACE is determined by the formula:

ACE = Net Actual Interchange (NAI) - Frequency Bias (FB) * (System Frequency - Nominal Frequency)

In this scenario, you have:

• System Frequency = 60.00 Hz

• Nominal Frequency = 60.00 Hz (standard frequency for grid operation)

• Frequency Bias = 100 MW/0.1 Hz

• Net Actual Interchange = +100 MW

Now, plugging in these values:

1. Calculate the frequency deviation:

Frequency Deviation = System Frequency - Nominal Frequency

Frequency Deviation = 60.00 Hz - 60.00 Hz = 0 Hz

2. Calculate the impact of frequency bias:

Frequency Bias Impact = Frequency Bias * Frequency Deviation

Since the frequency deviation is 0 Hz, the calculation for the frequency bias impact also results in 0 MW.

3. Substituting into the ACE calculation:

ACE = NAI - Frequency Bias Impact

ACE = +100