North American Electric Reliability
Corporation Test Questions and
Answers Study Guide
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? - 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 - 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? - 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? - ANSWER>>Increase MW
output
Which of the following is a Real-time measurement of a Balancing Authority's
control performance - ANSWER>>BAAL
Each Balancing Authority shall monitor which of the following against two
standards: CPS1 and BAAL? - ANSWER>>Control performance
In the calculating of CPS1, which of the below conditions would contribute to ta
favorable score? - 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? - ANSWER>>A-
The ACE will be a negative value and AGC will increase generation
Which statement best describes the CPS1 requirement? - 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? - 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? - 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? - ANSWER>>10B (FA-FS)
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? - ANSWER>>120 MW
Which of the following would be a use of the IME portion of the ACE equation? -
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? - ANSWER>>The limit gets more
restrictive.
How is the Frequency Response Obligation (FRO) of a Frequency Response
Sharing Group determined? - 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? - 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. - ANSWER>>False
, The minimum compliance for NERC DCS is - 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? - 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? - ANSWER>>-55 MW ACE in 15
minutes
How is the Frequency Response Measure (FRM) of a Balancing Authority
determined? - 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 ________. - ANSWER>>ninety
minutes
When does the Contingency Reserve Restoration Period begin? - 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
Corporation Test Questions and
Answers Study Guide
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? - 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 - 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? - 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? - ANSWER>>Increase MW
output
Which of the following is a Real-time measurement of a Balancing Authority's
control performance - ANSWER>>BAAL
Each Balancing Authority shall monitor which of the following against two
standards: CPS1 and BAAL? - ANSWER>>Control performance
In the calculating of CPS1, which of the below conditions would contribute to ta
favorable score? - 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? - ANSWER>>A-
The ACE will be a negative value and AGC will increase generation
Which statement best describes the CPS1 requirement? - 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? - 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? - 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? - ANSWER>>10B (FA-FS)
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? - ANSWER>>120 MW
Which of the following would be a use of the IME portion of the ACE equation? -
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? - ANSWER>>The limit gets more
restrictive.
How is the Frequency Response Obligation (FRO) of a Frequency Response
Sharing Group determined? - 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? - 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. - ANSWER>>False
, The minimum compliance for NERC DCS is - 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? - 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? - ANSWER>>-55 MW ACE in 15
minutes
How is the Frequency Response Measure (FRM) of a Balancing Authority
determined? - 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 ________. - ANSWER>>ninety
minutes
When does the Contingency Reserve Restoration Period begin? - 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
