NERC BOOK QUIZ 2023 WITH COMPLETE SOLUTIONS
If a Balancing Authority does not comply with the Control Performance Standard, the Balancing
Authority is not permitted to provide which of the following for any other Balancing Authority
entities? - (correct answer)Regulation of other services related to control performance
1. It is the obligation of each Balancing Authority to fulfill its commitment to the Interconnection and
not ________ the other balancing Authorities in the Interconnection - (correct answer)Burden
A Balancing Authority is performing Overlap Regulation Service for another Balancing Authority.
Which of the following statements applies to the Balancing Authority providing this service? -
(correct answer)The Balancing Authority's Frequency Bias Setting shall be modified to reflect the
combined Frequency Bias Setting of both Balancing Areas.
Balancing Authority A is currently reading a system frequency of 59.95 Hz. Its Net Actual Interchange
is +100 MW and its Net Scheduled Interchange is +200 MW. If Balancing Authority A's frequency bias
setting is 100 MW/0.1 Hz, Balancing Authority A's AGC is pulsing its generators to do what? - (correct
answer)Increase MW output
Which of the following is a Real-time measurement of a Balancing Authority's control performance -
(correct answer)BAAL
Each Balancing Authority shall monitor which of the following against two standards: CPS1 and
BAAL? - (correct answer)Control performance
In the calculating of CPS1, which of the below conditions would contribute to ta favorable score? -
(correct answer)Negative ACE when frequency is high,
positive ACE when frequency is low.
If the frequency bias setting is a higher value than the frequency response of a Balancing Authority
and a frequency decline is caused by a sudden loss of generation is an external balancing area, what
will be the result? - (correct answer)A- The ACE will be a negative value and AGC will increase
generation
Which statement best describes the CPS1 requirement? - (correct answer)The Responsible Entity
shall operate such that its CPS1 is greater than or equal to 100% for the preceding 12 month period.
To be in compliance with the BAL-001 requirements, a Balancing Authority must have which of the
following? - (correct answer)CPS1 greater than or equal to 100% and ACE does not exceed the BAAL
more than 30 consecutive minutes
Actual System Frequency (FA) is 60.03 Hz, a Balancing Authority is under-generating slightly to
prepare for an upcoming interchange transaction. What is the Balancing Authority doing? - (correct
answer)The BA is helping the Interconnection Frequency.
You are a Balancing Authority Operator. A neighboring Balancing Authority in the Interconnection
suddenly had a 500 MW generator to trip off line by generator differential. What part of the ACE
equation,
ACE = (NIA-NIS) - 10B (FA-FS) - IME, allows you and other Balancing Authorities in the
Interconnection to contribute to the stabilization of the Interconnection frequency error? - (correct
answer)10B (FA-FS)
,NERC BOOK QUIZ 2023 WITH COMPLETE SOLUTIONS
In your Interconnection, a generator tripped that was large enough to reduce the frequency from
60.000 Hz to 59.940 Hz. Your Balancing Authority's Frequency Bias is 200 MW/0.1 Hz. How many
MW would your system initially contribute to frequency support? - (correct answer)120 MW
Which of the following would be a use of the IME portion of the ACE equation? - (correct
answer)Represent flow of a tie line with an out of service meter.
What happens to the Balancing Authority ACE Limit (BAAL) when frequency moves farther away
from scheduled frequency? - (correct answer)The limit gets more restrictive.
How is the Frequency Response Obligation (FRO) of a Frequency Response Sharing Group
determined? - (correct answer)By adding the individual FRO's of each member.
A Balancing Authority has an ACE reading of -100MWs and frequency is 60.12 Hz. Is the BA
exceeding the BAAL? - (correct answer)No
A Balancing Authority that is a member of a Generation Reserve Sharing Group is the Responsible
Entity only in periods during which the Balancing Authority is not in active status under the
applicable agreement or the governing rules for the Generation Reserve Sharing Group. - (correct
answer)False
The minimum compliance for NERC DCS is - (correct answer)100% for all reportable disturbances.
A generator tripped in your Interconnection that was large enough to cause frequency to drop to
59.950 Hz. Your Balancing Authority's Frequency Bias is 120 MW/0.1 Hz. How many MWs would
your system initially contribute to frequency support? - (correct answer)60 MWs
A Balancing Authority has a normal load of around 8500 MW. Its most severe single contingency is a
700-MW coal-fired steam unit. At 0810 the ACE value was at -55 MW when a 600-MW generator in
the Balancing Authority's northern area tripped off line as the result of a generator differential. This
resulted in a large negative ACE for the Balancing Authority. What value must the ACE return to and
in what time frame to avoid a DCS violation? - (correct answer)-55 MW ACE in 15 minutes
How is the Frequency Response Measure (FRM) of a Balancing Authority determined? - (correct
answer)It is the median of the BA's frequency response for the frequency deviation events identified
by NERC for the previous year.
The Contingency Reserve Restoration period is ________. - (correct answer)ninety minutes
When does the Contingency Reserve Restoration Period begin? - (correct answer)At the end of the
Disturbance Recovery Period.
A Balancing Authority has a normal load of around 8500 MW. Its most severe single contingency is a
700-MW coal-fired steam unit. At 0810 the ACE value was at -55 MW when a 600-MW generator in
the Balancing Authority's northern area tripped off line as the result of a generator differential. This
resulted in a large negative ACE for the Balancing Authority. What value must the ACE return to and
in what time frame to avoid a DCS violation? - (correct answer)-55 MW ACE in 15 minutes
A Balancing Authority's largest single contingency is a unit rated at 1,000 MW. Which of the
following disturbances would constitute a reportable disturbance for DCS evaluation based on the
NERC DCS criteria? - (correct answer)The loss of a 950 MW generating unit at 100%.
, NERC BOOK QUIZ 2023 WITH COMPLETE SOLUTIONS
If a Reserve Sharing Group member has experienced a Reportable Disturbance condition but does
not call for reserve activation from other members, the entire group shall still be considered to be in
a disturbance condition. - (correct answer)False
Which of the following is a potential source of Contingency Reserve?
1. Offline generation that takes 10 minutes to start at full output.
2. Online generation at 100% capacity
3. Controllable load resources.
4. Voltage reductions. - (correct answer)1 and 3
The minimum compliance for NERC DCS is _____________? - (correct answer)100% for all reportable
disturbances.
How is the Frequency Response Measure (FRM) of a Balancing Authority determined? - (correct
answer)It is the median of the BA's frequency response for the frequency deviation events identified
by NERC for the previous year.
In order to achieve sufficient Frequency Response, the Frequency Response Measure (FRM) of a
Balancing Authority or Frequency Response Sharing Group must be: - (correct answer)Equal to or
more negative than the Frequency Response Obligation (FRO)
A Balancing Authority is performing Overlap Regulation Service for another Balancing Authority.
Which of the following statements applies to the Balancing Authority providing this service? -
(correct answer)The Balancing Authority's Frequency Bias Setting shall be modified to reflect the
combined Frequency Bias Setting of both Balancing Areas.
Balancing Authority A is currently reading a system frequency of 59.95 Hz. Its Net Actual Interchange
is +100 MW and its Net Scheduled Interchange is +200 MW. If Balancing Authority A's frequency bias
setting is 100 MW/0.1 Hz, Balancing Authority A's AGC is pulsing its generators to do what? - (correct
answer)Increase MW output
In order to achieve sufficient Frequency Response, the Frequency Response Measure (FRM) of a
Balancing Authority or Frequency Response Sharing Group must be: - (correct answer)Equal to or
more negative than the Frequency Response Obligation (FRO)
If the frequency bias setting is a higher value than the frequency response of a Balancing Authority
and a frequency decline is caused by a sudden loss of generation is an external balancing area, what
will be the result? - (correct answer)The ACE will be a negative value and AGC will increase
generation
What is the primary purpose of governor dead band? - (correct answer)It prevents governors from
operating when slight variations occur in the system's frequency.
How is the Frequency Response Obligation (FRO) of a Frequency Response Sharing Group
determined? - (correct answer)By adding the individual FRO's of each member.
A portion of a Balancing Authority's EMS has gone down and the EMS can no longer calculate ACE.
According to NERC, how long can a Balancing Authority operate without the ability to calculate ACE
before notifying its Reliability Coordinator? - (correct answer)30 minutes
If a Balancing Authority does not comply with the Control Performance Standard, the Balancing
Authority is not permitted to provide which of the following for any other Balancing Authority
entities? - (correct answer)Regulation of other services related to control performance
1. It is the obligation of each Balancing Authority to fulfill its commitment to the Interconnection and
not ________ the other balancing Authorities in the Interconnection - (correct answer)Burden
A Balancing Authority is performing Overlap Regulation Service for another Balancing Authority.
Which of the following statements applies to the Balancing Authority providing this service? -
(correct answer)The Balancing Authority's Frequency Bias Setting shall be modified to reflect the
combined Frequency Bias Setting of both Balancing Areas.
Balancing Authority A is currently reading a system frequency of 59.95 Hz. Its Net Actual Interchange
is +100 MW and its Net Scheduled Interchange is +200 MW. If Balancing Authority A's frequency bias
setting is 100 MW/0.1 Hz, Balancing Authority A's AGC is pulsing its generators to do what? - (correct
answer)Increase MW output
Which of the following is a Real-time measurement of a Balancing Authority's control performance -
(correct answer)BAAL
Each Balancing Authority shall monitor which of the following against two standards: CPS1 and
BAAL? - (correct answer)Control performance
In the calculating of CPS1, which of the below conditions would contribute to ta favorable score? -
(correct answer)Negative ACE when frequency is high,
positive ACE when frequency is low.
If the frequency bias setting is a higher value than the frequency response of a Balancing Authority
and a frequency decline is caused by a sudden loss of generation is an external balancing area, what
will be the result? - (correct answer)A- The ACE will be a negative value and AGC will increase
generation
Which statement best describes the CPS1 requirement? - (correct answer)The Responsible Entity
shall operate such that its CPS1 is greater than or equal to 100% for the preceding 12 month period.
To be in compliance with the BAL-001 requirements, a Balancing Authority must have which of the
following? - (correct answer)CPS1 greater than or equal to 100% and ACE does not exceed the BAAL
more than 30 consecutive minutes
Actual System Frequency (FA) is 60.03 Hz, a Balancing Authority is under-generating slightly to
prepare for an upcoming interchange transaction. What is the Balancing Authority doing? - (correct
answer)The BA is helping the Interconnection Frequency.
You are a Balancing Authority Operator. A neighboring Balancing Authority in the Interconnection
suddenly had a 500 MW generator to trip off line by generator differential. What part of the ACE
equation,
ACE = (NIA-NIS) - 10B (FA-FS) - IME, allows you and other Balancing Authorities in the
Interconnection to contribute to the stabilization of the Interconnection frequency error? - (correct
answer)10B (FA-FS)
,NERC BOOK QUIZ 2023 WITH COMPLETE SOLUTIONS
In your Interconnection, a generator tripped that was large enough to reduce the frequency from
60.000 Hz to 59.940 Hz. Your Balancing Authority's Frequency Bias is 200 MW/0.1 Hz. How many
MW would your system initially contribute to frequency support? - (correct answer)120 MW
Which of the following would be a use of the IME portion of the ACE equation? - (correct
answer)Represent flow of a tie line with an out of service meter.
What happens to the Balancing Authority ACE Limit (BAAL) when frequency moves farther away
from scheduled frequency? - (correct answer)The limit gets more restrictive.
How is the Frequency Response Obligation (FRO) of a Frequency Response Sharing Group
determined? - (correct answer)By adding the individual FRO's of each member.
A Balancing Authority has an ACE reading of -100MWs and frequency is 60.12 Hz. Is the BA
exceeding the BAAL? - (correct answer)No
A Balancing Authority that is a member of a Generation Reserve Sharing Group is the Responsible
Entity only in periods during which the Balancing Authority is not in active status under the
applicable agreement or the governing rules for the Generation Reserve Sharing Group. - (correct
answer)False
The minimum compliance for NERC DCS is - (correct answer)100% for all reportable disturbances.
A generator tripped in your Interconnection that was large enough to cause frequency to drop to
59.950 Hz. Your Balancing Authority's Frequency Bias is 120 MW/0.1 Hz. How many MWs would
your system initially contribute to frequency support? - (correct answer)60 MWs
A Balancing Authority has a normal load of around 8500 MW. Its most severe single contingency is a
700-MW coal-fired steam unit. At 0810 the ACE value was at -55 MW when a 600-MW generator in
the Balancing Authority's northern area tripped off line as the result of a generator differential. This
resulted in a large negative ACE for the Balancing Authority. What value must the ACE return to and
in what time frame to avoid a DCS violation? - (correct answer)-55 MW ACE in 15 minutes
How is the Frequency Response Measure (FRM) of a Balancing Authority determined? - (correct
answer)It is the median of the BA's frequency response for the frequency deviation events identified
by NERC for the previous year.
The Contingency Reserve Restoration period is ________. - (correct answer)ninety minutes
When does the Contingency Reserve Restoration Period begin? - (correct answer)At the end of the
Disturbance Recovery Period.
A Balancing Authority has a normal load of around 8500 MW. Its most severe single contingency is a
700-MW coal-fired steam unit. At 0810 the ACE value was at -55 MW when a 600-MW generator in
the Balancing Authority's northern area tripped off line as the result of a generator differential. This
resulted in a large negative ACE for the Balancing Authority. What value must the ACE return to and
in what time frame to avoid a DCS violation? - (correct answer)-55 MW ACE in 15 minutes
A Balancing Authority's largest single contingency is a unit rated at 1,000 MW. Which of the
following disturbances would constitute a reportable disturbance for DCS evaluation based on the
NERC DCS criteria? - (correct answer)The loss of a 950 MW generating unit at 100%.
, NERC BOOK QUIZ 2023 WITH COMPLETE SOLUTIONS
If a Reserve Sharing Group member has experienced a Reportable Disturbance condition but does
not call for reserve activation from other members, the entire group shall still be considered to be in
a disturbance condition. - (correct answer)False
Which of the following is a potential source of Contingency Reserve?
1. Offline generation that takes 10 minutes to start at full output.
2. Online generation at 100% capacity
3. Controllable load resources.
4. Voltage reductions. - (correct answer)1 and 3
The minimum compliance for NERC DCS is _____________? - (correct answer)100% for all reportable
disturbances.
How is the Frequency Response Measure (FRM) of a Balancing Authority determined? - (correct
answer)It is the median of the BA's frequency response for the frequency deviation events identified
by NERC for the previous year.
In order to achieve sufficient Frequency Response, the Frequency Response Measure (FRM) of a
Balancing Authority or Frequency Response Sharing Group must be: - (correct answer)Equal to or
more negative than the Frequency Response Obligation (FRO)
A Balancing Authority is performing Overlap Regulation Service for another Balancing Authority.
Which of the following statements applies to the Balancing Authority providing this service? -
(correct answer)The Balancing Authority's Frequency Bias Setting shall be modified to reflect the
combined Frequency Bias Setting of both Balancing Areas.
Balancing Authority A is currently reading a system frequency of 59.95 Hz. Its Net Actual Interchange
is +100 MW and its Net Scheduled Interchange is +200 MW. If Balancing Authority A's frequency bias
setting is 100 MW/0.1 Hz, Balancing Authority A's AGC is pulsing its generators to do what? - (correct
answer)Increase MW output
In order to achieve sufficient Frequency Response, the Frequency Response Measure (FRM) of a
Balancing Authority or Frequency Response Sharing Group must be: - (correct answer)Equal to or
more negative than the Frequency Response Obligation (FRO)
If the frequency bias setting is a higher value than the frequency response of a Balancing Authority
and a frequency decline is caused by a sudden loss of generation is an external balancing area, what
will be the result? - (correct answer)The ACE will be a negative value and AGC will increase
generation
What is the primary purpose of governor dead band? - (correct answer)It prevents governors from
operating when slight variations occur in the system's frequency.
How is the Frequency Response Obligation (FRO) of a Frequency Response Sharing Group
determined? - (correct answer)By adding the individual FRO's of each member.
A portion of a Balancing Authority's EMS has gone down and the EMS can no longer calculate ACE.
According to NERC, how long can a Balancing Authority operate without the ability to calculate ACE
before notifying its Reliability Coordinator? - (correct answer)30 minutes
