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NERC RC Final Exam | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+)
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NERC RC Final Exam | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+)
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NERC RC Final Exam | Actual Questions and Answers Latest Updated 2024/2025 (Graded A+) What is ACE? - ✔✔(NIa - NIs) - 10β(fa - fs) - Ime Calculated every 6 seconds Uses Tie line Frequency Bias What is Tie line deviation? - ✔✔Largest offset to ACE What is NIA? - ✔✔Net Interchange Actual (sum of all tie -line values) What is NIS? - ✔✔Net Interchange Scheduled (sum of all interchange schedules) What is the multiplier for frequency bias? - ✔✔10 What is β? - ✔✔Frequency bias - represented as negative number in ACE calculation - reflects area natural response to frequency changes (Inertia, Governor, Load) - atleast 1% of annual peak load for areas with native load - 1% of peak generation output for area with no load What is FA? - ✔✔Frequency Actual What is FS? - ✔✔Frequency Schedule - normally 60.00 HZ except for time corrections - +/- .02 Hz What is IME? - ✔✔Meter error fudge factor used for inadvertent bilateral payback Negligible What should be done if unable to calculate ACE for 30 minutes? - ✔✔Contact RC How often should time error and frequency devices be checked/calibrated? - ✔✔Annually Negative Ace - ✔✔The BA is Undergenerating Positve ACE - ✔✔The BA is Overgenerating What happens during Internal Loss of Load? - ✔✔Frequency and ACE increas e. What happens during External Loss of Load? - ✔✔Frequency increases, no change in ACE. What is the Frequency Bias Setting? - ✔✔Monthly average >= 1% of estimated yearly peak demand per 0.1 Hz When should the Balancing Authority recalculate its Frequency Bias Setting? - ✔✔By January 1 of each year What happens when there is internal generation loss? - ✔✔Frequency and ACE drop, tie -line flows increase into the system What happens when there is external generation loss? - ✔✔Frequency drops, no change in ACE, net tie -line flows increase out of the system What happens when Frequency bias setting is lower than frequency response? - ✔✔ACE will be positive causing the AGC to lower generation What is the percentage change in load required for a 1% change in frequency? - ✔✔1% - 2% change in load What is the load reduction when Transmission Customer Voltage is reduced by 5%? - ✔✔Load will reduce by 3% What happens to ACE and AGC when the frequency bia s setting is set to a less negative value than the frequency response of a Balancing Authority and a frequency increase is caused by a sudden loss of load in an external balancing area? - ✔✔ACE will be a negative value and AGC will increase generation Wha t happens to ACE and AGC when the frequency bias setting is less negative than the frequency response of a Balancing Authority and a frequency decline is caused by a sudden loss of generation in an external balancing area? - ✔✔ACE will be a positive value and AGC will lower generation What is the normal schedule frequency? - ✔✔60.00 Hz What is the frequency correction for fast clock schedule? - ✔✔59.98 Hz What is the frequency corrections for a slow clock schedule? - ✔✔60.02 Hz When does frequency incre ase? - ✔✔Generation increases or load decreases When does frequency decrease? - ✔✔Generation decreases or load increases Who is the Time Monitor? - ✔✔Can only be RC one per Interconnection Who is designated as Interconnection Time Monitor? - ✔✔Single RC designated by NERC Operating Committee When can a time error correction be cancelled? - ✔✔with 30% BAs in area requests What is the minimum duration for time error correction? - ✔✔1 hour
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