NERC RC Exam Prep
200 MW is scheduled to flow from Area X to Area Y. A transmission line on the scheduled
course has an 80% distribution factor for this agenda. How tons of the 2 hundred MW agenda
will drift at the transmission line?
A. 160 MW
B. One hundred MW
C. 40 MW
D. 200 MW - ANS-A. A hundred and sixty MW
A 50 MVA generator is presently generating forty MWs and 10 MVARS.
What are the dynamic reactive reserves currently on this generator?
A. Zero
B. 50
C. 30
D. 20 - ANS-D. 20
A 200 MW agenda begins at 1200 hours with a ten-minute ramp and ends at 1400 hours. What
is the actual integrated brought electricity for hour ending 1300?
A. One hundred seventy five MW
B. 188 MW
C. 196 MW
D. 200 MW - ANS-C. 196 MW
A 230/115 kV transformer is rated at 100 MVA and has eighty MWs coming into the number one
side. What would you expect the actual power output to be at the secondary facet?
A. A hundred and sixty MW
B. 100 MW
C. Eighty MW
D. Forty MW - ANS-C. Eighty MW
A 354 kV line carrying 1250 MWs of energy journeys off-line. This consequences in a SOL and
IROL violation for a 230 kV parallel line and a few substation buses to be 10% under their
nominal voltage. What can the transmission operator do to return the device to its hooked up
voltage limits prepared, for the next contingency?
,A. Request energy marketers buy strength.
B. Use Under Load Tap Changers to increase the distribution voltage.
C. Send out an attraction for voluntary reductions.
D. Re-dispatch technology, request MVAR aid from each generator, region all available voltage
support equipment on line, and curtail load if vital. - ANS-D. Re-dispatch technology, request
MVAR help from every generator, vicinity all available voltage support equipment on-line, and
curtail load if important.
A 500 MW generator to your Balancing Area has a droop placing of 5%. It is presently running
at 300 MWs. If frequency of the Interconnection dropped to fifty nine.94, what is the resulting
MW output of the generator?
A. Four hundred MWs
B. 310 MWs
C. 325 MWs
D. 290 MWs - ANS-B. 310 MWs
A 500 MW generator journeys in a Balancing Authority outside your Balancing Authority Area.
Which of the following responses would you expect to look for your place?
A. Net Actual Interchange extra than Scheduled Interchange.
B. Reduced internet generation on your device.
C. Frequency above 60 Hz.
D. Reduced Net Actual Interchange - ANS-A. Net Actual Interchange more than Scheduled
Interchange.
A seven-hundred MW generator in a Balancing Authority location trips due to operator mistakes.
Which control system on the remaining mills would reply to the drop in machine frequency as a
result of the loss of technology?
A. Governor control structures
B. Automatic voltage regulators
C. Special safety structures
D. Differential relay systems - ANS-A. Governor manipulate structures
A Balancing Authority reports a Reportable Balancing Contingency Event which ends up in ACE
losing to -540 MW. The BA's ACE turned into 0 previous to the occasion. Ten minutes into the
restoration, a 150 MW generator journeys, resulting in ACE losing again. What need to the BA
go back its ACE to through the give up of the recuperation length to be compliant?
A. 150 MW
B. Zero MW
C. -390 MW
D. -one hundred fifty MW - ANS-D. -150 MW
,A Balancing Authority studies generators that become unavailable to start -up due to gasoline
shortages. When a massive generator trips the Balancing Authority reaches out to its Reliability
Coordinator. What would the Reliability Coordinator subsequent actions consist of?
A. The Reliability Coordinator will difficulty a TLR as quickly as viable
B. The Reliability Coordinator will notify neighboring Reliability Coordinators as wanted.
C. The Reliability Coordinator will notify the Balancing Authorities and Transmission Operators
inside its RC Area within an hour
D. The Reliability Coordinator will notify the Balancing Authorities and Transmission Operators
inside its RC Area within 30 minutes - ANS-D. The Reliability Coordinator will notify the
Balancing Authorities and Transmission Operators within its RC Area inside half-hour
A Balancing Authority has four schedules of 25 MW (sales) for a Net Interchange Schedule
(NIs) of a hundred MW. One 25 MW schedule was entered into the EMS backwards. What time
table will your mills move toward?
A. 50 MW
B. -50 MW
C. -100 MW
D. 150 MW - ANS-A. 50 MW
A Balancing Authority has a Net Interchange Schedule of 150 MW, and a frequency bias of -a
hundred MW/zero.1 Hz. Its Net Interchange Actual is a hundred ninety MW, and the real
Interconnection frequency is 59.95 Hz.
Calculate the Balancing Authorities ACE.
A. 50 MW
B. Forty MW
C. -10 MW
D. 0 MW - ANS-C. -10 MW
A Balancing Authority has a normal load of round 8500 MW. Its most severe unmarried
contingency is a seven hundred MW coal-fired steam unit. At 0810, the ACE price changed into
at -55 MW when a six hundred MW generator within the Balancing Authority's northern area
tripped off line because of a generator differential. This event resulted in a massive bad ACE for
the Balancing Authority. What cost should ACE return to and in what time frame to keep away
from a DCS violation?
A. -55 MW ACE in 15 minutes
B. Zero ACE in 10 mins
C. -55 MW ACE in 10 mins
, D. Zero ACE in 15 minutes - ANS-A. -fifty five MW ACE in 15 mins
A Balancing Authority has determined one tie line meter studying is off through 30 MW, inflicting
the ACE values to be wrong. What have to be carried out to briefly alter for the mistake till the
meter may be calibrated or repaired?
A. Take the numbers from the incorrect tie line and insert them into the NIS portion of the ACE
equation
B. Use the IME part of the equation to modify for the meter blunders
C. Change the AGC mode to Flat Frequency Control
D. Change the Frequency Bias part of the ACE equation to mirror the error - ANS-B. Use the
IME part of the equation to alter for the meter blunders
A Balancing Authority is barely undergenerating its Actual System Frequency (FA) is 60.03 Hz.
What is the end result of the Balancing Authority's action?
A. The Balancing Authority is supporting the Interconnection Frequency.
B. The Balancing Authority is in CPS1 violation.
C. The Balancing Authority is hurting the Interconnection Frequency.
D. The Balancing Authority is in BAAL violation - ANS-A. The Balancing Authority is helping the
Interconnection Frequency
A Balancing Authority keeps era-interchange-load stability for their Balancing Authority Area.
How does the Balancing Authority make certain that SOLs aren't passed?
A. Do no longer permit unscheduled power drift.
B. Set technology at most output.
C. Ensure generator assets are sufficient to fulfill call for.
D. Increase limits primarily based on wishes. - ANS-C. Ensure generator sources are sufficient
to satisfy call for.
A Balancing Authority notices their Operating Reserve has steadily declined all through the
hour. What is the maximum probably reason.
A. Loss of a large generator inside the vicinity
B. An faulty load forecast
C. Loss of a prime transmission line
D. Disable AGC - ANS-B. An faulty load forecast
A Balancing Authority's CPS1 calculation is computed using its clock-minute common of two
values. What are the ones values?
A. Reporting ACE and Frequency Error
200 MW is scheduled to flow from Area X to Area Y. A transmission line on the scheduled
course has an 80% distribution factor for this agenda. How tons of the 2 hundred MW agenda
will drift at the transmission line?
A. 160 MW
B. One hundred MW
C. 40 MW
D. 200 MW - ANS-A. A hundred and sixty MW
A 50 MVA generator is presently generating forty MWs and 10 MVARS.
What are the dynamic reactive reserves currently on this generator?
A. Zero
B. 50
C. 30
D. 20 - ANS-D. 20
A 200 MW agenda begins at 1200 hours with a ten-minute ramp and ends at 1400 hours. What
is the actual integrated brought electricity for hour ending 1300?
A. One hundred seventy five MW
B. 188 MW
C. 196 MW
D. 200 MW - ANS-C. 196 MW
A 230/115 kV transformer is rated at 100 MVA and has eighty MWs coming into the number one
side. What would you expect the actual power output to be at the secondary facet?
A. A hundred and sixty MW
B. 100 MW
C. Eighty MW
D. Forty MW - ANS-C. Eighty MW
A 354 kV line carrying 1250 MWs of energy journeys off-line. This consequences in a SOL and
IROL violation for a 230 kV parallel line and a few substation buses to be 10% under their
nominal voltage. What can the transmission operator do to return the device to its hooked up
voltage limits prepared, for the next contingency?
,A. Request energy marketers buy strength.
B. Use Under Load Tap Changers to increase the distribution voltage.
C. Send out an attraction for voluntary reductions.
D. Re-dispatch technology, request MVAR aid from each generator, region all available voltage
support equipment on line, and curtail load if vital. - ANS-D. Re-dispatch technology, request
MVAR help from every generator, vicinity all available voltage support equipment on-line, and
curtail load if important.
A 500 MW generator to your Balancing Area has a droop placing of 5%. It is presently running
at 300 MWs. If frequency of the Interconnection dropped to fifty nine.94, what is the resulting
MW output of the generator?
A. Four hundred MWs
B. 310 MWs
C. 325 MWs
D. 290 MWs - ANS-B. 310 MWs
A 500 MW generator journeys in a Balancing Authority outside your Balancing Authority Area.
Which of the following responses would you expect to look for your place?
A. Net Actual Interchange extra than Scheduled Interchange.
B. Reduced internet generation on your device.
C. Frequency above 60 Hz.
D. Reduced Net Actual Interchange - ANS-A. Net Actual Interchange more than Scheduled
Interchange.
A seven-hundred MW generator in a Balancing Authority location trips due to operator mistakes.
Which control system on the remaining mills would reply to the drop in machine frequency as a
result of the loss of technology?
A. Governor control structures
B. Automatic voltage regulators
C. Special safety structures
D. Differential relay systems - ANS-A. Governor manipulate structures
A Balancing Authority reports a Reportable Balancing Contingency Event which ends up in ACE
losing to -540 MW. The BA's ACE turned into 0 previous to the occasion. Ten minutes into the
restoration, a 150 MW generator journeys, resulting in ACE losing again. What need to the BA
go back its ACE to through the give up of the recuperation length to be compliant?
A. 150 MW
B. Zero MW
C. -390 MW
D. -one hundred fifty MW - ANS-D. -150 MW
,A Balancing Authority studies generators that become unavailable to start -up due to gasoline
shortages. When a massive generator trips the Balancing Authority reaches out to its Reliability
Coordinator. What would the Reliability Coordinator subsequent actions consist of?
A. The Reliability Coordinator will difficulty a TLR as quickly as viable
B. The Reliability Coordinator will notify neighboring Reliability Coordinators as wanted.
C. The Reliability Coordinator will notify the Balancing Authorities and Transmission Operators
inside its RC Area within an hour
D. The Reliability Coordinator will notify the Balancing Authorities and Transmission Operators
inside its RC Area within 30 minutes - ANS-D. The Reliability Coordinator will notify the
Balancing Authorities and Transmission Operators within its RC Area inside half-hour
A Balancing Authority has four schedules of 25 MW (sales) for a Net Interchange Schedule
(NIs) of a hundred MW. One 25 MW schedule was entered into the EMS backwards. What time
table will your mills move toward?
A. 50 MW
B. -50 MW
C. -100 MW
D. 150 MW - ANS-A. 50 MW
A Balancing Authority has a Net Interchange Schedule of 150 MW, and a frequency bias of -a
hundred MW/zero.1 Hz. Its Net Interchange Actual is a hundred ninety MW, and the real
Interconnection frequency is 59.95 Hz.
Calculate the Balancing Authorities ACE.
A. 50 MW
B. Forty MW
C. -10 MW
D. 0 MW - ANS-C. -10 MW
A Balancing Authority has a normal load of round 8500 MW. Its most severe unmarried
contingency is a seven hundred MW coal-fired steam unit. At 0810, the ACE price changed into
at -55 MW when a six hundred MW generator within the Balancing Authority's northern area
tripped off line because of a generator differential. This event resulted in a massive bad ACE for
the Balancing Authority. What cost should ACE return to and in what time frame to keep away
from a DCS violation?
A. -55 MW ACE in 15 minutes
B. Zero ACE in 10 mins
C. -55 MW ACE in 10 mins
, D. Zero ACE in 15 minutes - ANS-A. -fifty five MW ACE in 15 mins
A Balancing Authority has determined one tie line meter studying is off through 30 MW, inflicting
the ACE values to be wrong. What have to be carried out to briefly alter for the mistake till the
meter may be calibrated or repaired?
A. Take the numbers from the incorrect tie line and insert them into the NIS portion of the ACE
equation
B. Use the IME part of the equation to modify for the meter blunders
C. Change the AGC mode to Flat Frequency Control
D. Change the Frequency Bias part of the ACE equation to mirror the error - ANS-B. Use the
IME part of the equation to alter for the meter blunders
A Balancing Authority is barely undergenerating its Actual System Frequency (FA) is 60.03 Hz.
What is the end result of the Balancing Authority's action?
A. The Balancing Authority is supporting the Interconnection Frequency.
B. The Balancing Authority is in CPS1 violation.
C. The Balancing Authority is hurting the Interconnection Frequency.
D. The Balancing Authority is in BAAL violation - ANS-A. The Balancing Authority is helping the
Interconnection Frequency
A Balancing Authority keeps era-interchange-load stability for their Balancing Authority Area.
How does the Balancing Authority make certain that SOLs aren't passed?
A. Do no longer permit unscheduled power drift.
B. Set technology at most output.
C. Ensure generator assets are sufficient to fulfill call for.
D. Increase limits primarily based on wishes. - ANS-C. Ensure generator sources are sufficient
to satisfy call for.
A Balancing Authority notices their Operating Reserve has steadily declined all through the
hour. What is the maximum probably reason.
A. Loss of a large generator inside the vicinity
B. An faulty load forecast
C. Loss of a prime transmission line
D. Disable AGC - ANS-B. An faulty load forecast
A Balancing Authority's CPS1 calculation is computed using its clock-minute common of two
values. What are the ones values?
A. Reporting ACE and Frequency Error
