North American Electric Reliability Corporation Balancing
Authority Certification EXAM LATEST 2026-2027 100
QUESTIONS AND 100% Verified ANSWERS
What is the most important information needed for forecasting load?
Planned generation outages
Historic load
Weather forecast
Planned transmission outages - answer>>Weather forecast
When coordinating under frequency load shedding and under frequency generator tripping the
_____________________________.
breakers should open at the same time as the UFLS
generators should trip before the UFLS
load should not be shed during the process
generators should trip after the UFLS - answer>>EOP-011, Emergency Operations - The Transmission Operator and
the Balancing Authority shall have Operating Plans with provisions for operator-controlled manual Load shedding
that minimizes implemented in a timeframe adequate for mitigating the Emergency. Under frequency load
shedding, or UFLS, is designed to drop load to match generation. Under frequency generator relays are designed
to protect generators from operating at low frequencies for an extended period of time. These generator relays
should be set to trip to protect the generators if UFLS is unable to return the frequency to an acceptable value
within a set period of time. The first trip of under frequency generator relays should be AFTER the last trip of UFLS
relays. generators should trip after the UFLS
What is the most important consideration in load forecasting?
Weather
Historic load
Generator outages
,Energy Profile - answer>>Weather
In an island, what is the most appropriate AGC mode of operationConstant Interchange or Flat Tie
Off
Tie-line bias control
Constant or Flat Frequency - answer>>Normally, the Tie Line Bias control mode, which compares the Net Actual
Interchange to the Net Scheduled Interchange plus the Balancing Authority's frequency bias obligation, should be
used. However if a Balancing Authority is operating asynchronously (separated from the Interconnection), it
should switch to Flat Frequency Control since its tie lines are no longer connected to the Interconnection. It is
important for the Balancing Authority to maintain 60 Hz. In the Flat Frequency control mode, ACE is looking only at
the system frequency, not the Interchange portion of the ACE equation.
150 MW is flowing into the high side of a 200 MVA transformer. If the transformer windings have a 2 to 1 ratio
what MW value is flowing out of the low side winding of the transformer?
150 MW
75 MW
250 MW
200 MW - answer>>Power flow through a transformer is constant. The transformer steps up or down the voltage,
but power flow does not change. 150 MW
After a major disturbance, Interconnection frequency is remaining around 59.92Hz, your Balancing Authorities ACE
is 0 and have 200 MW of extra generation. What should the Balancing Authority system operator do?
Offer assistance to entities needing it.
Change the AGC mode to Flat Frequency
Shed Load.
Increase Generation. - answer>>After a disturbance where frequency declines significantly, the entire
Interconnection will react (automatically) with governors increasing generation and load decreasing slightly. Load
and Generation will rebalance at a lower frequency until generation is increased to return the Interconnection
frequency to 60.00 Hz. The best answer is to offer assistance to the deficient Balancing Authority by offering the
200 MW of reserves in a bilateral interchange transaction to help restore generation and load balance in the
Interconnection
,Offer assistance to entities needing it.
Incorrect The load in Balancing Authority "A" is currently 2000 MWs. The Interconnection frequency drops from
60.00 Hz to 59.70 Hz due to a disturbance in another Balancing Authority. What change in load can BA "A" expect
to see?
The load should increase approximately 40 MWs.
The load should decrease approximately 40 MWs.
The load should decrease approximately 20 MWs.
The load should increase approximately 20 MWs. limits - answer>>Load on the power system changes with
frequency. For every 1% change in frequency, load will change approximately 2% in the same direction. This load
change is primarily from induction motor load and not from resistive loads. -
In this scenario, the frequency dropped from 60.00 to 59.70, or .3 Hz. .3 Hz is .5% of 60 Hz. Therefore, load should
decrease 1%, or 20 MWs.
NERC Frequency Response Characteristic Survey Training Document
NERC Standard BAL-003
The load should decrease approximately 20 MWs.
Balancing Authority A expecting a 5,000 MW peak at Hour Ending 1500 hour, when 3,000 MWs of the 7,500 MW
of generation trips. That leaves 4,500 MWs of generation and 1,500 MW purchases to meet the peak demand.
When the purchases are cut by 1,000 MW to a new Net of -500 MW. Total of 5,000 MW in generation and firm
schedule to meet a forecasted 5,000 MW peak load. A factor to consider is a 5,000 MW forecast will most likely
result in a higher instantaneous load and that there is NO generation available for reserves. A Balancing Authority
in this situation would be in an Energy Emergency Alert Level 2 and will work with the Reliability Coordinator to
implement mitigating actions, such as, demand side management.
1.Notify the RC that this BA is contacting TOPs and LSE's to shed 200 MW of load.
2.Notify the RC that this BA is in EEA Level 1; notify all power plants to be on alert.
Notify the RC that this BA is in EEA Lev - answer>>Notify the RC that this BA is in an EEA Level 2; start all available
generation; schedule emergency interchange purchases; prepare to reduce firm load.
, During a system emergency, the System Operator can direct other Transmission Operators and Balancing
Authorities to violate which limit?
Interconnection Reliability Operating Limit
System Operating Limit
Available Transfer Capacity
Equipment parameters should be maintained within their established limits - answer>>Throughout the NERC
Standards requirements state that System Operating Limits must be respected. To ensure a reliable power system,
established limits can not be violated.
Application Equipment parameters should be maintained within their established limits
A simple power system is composed of three transmission lines that connect the generation area to the load area.
The three lines are different lengths but each line has the same impedance. Each line is initially loaded at 200 MW.
The SOL of each line is 400 MW. If one of the three lines trips, what will be the loading on the shortest remaining
line and will the SOL of either remaining line be violated?
300 MW/No
300 MW/Yes
400 MW/Yes
400 MW/No - answer>>300 MW/No NERC Standard TOP-001: Transmission Operators should not operate outside
identified limits and they shall ensure that a Real-time assessment is performed at least once every 30 minutes. In
this scenario, there is a total of 600 MW moving from generation to load across three lines with equal impedance.
When one of the three lines trips, the two remaining lines will each carry 1/2 of the total MW flow, or 300 MW.
The SOL of 400 MW will not be violated.
A request for a generator unit outage has been made to the planners. The planners must analyze this request to
ensure the generator will not be needed
ensure adequate real and reactive reserves
ensure system reliability
Authority Certification EXAM LATEST 2026-2027 100
QUESTIONS AND 100% Verified ANSWERS
What is the most important information needed for forecasting load?
Planned generation outages
Historic load
Weather forecast
Planned transmission outages - answer>>Weather forecast
When coordinating under frequency load shedding and under frequency generator tripping the
_____________________________.
breakers should open at the same time as the UFLS
generators should trip before the UFLS
load should not be shed during the process
generators should trip after the UFLS - answer>>EOP-011, Emergency Operations - The Transmission Operator and
the Balancing Authority shall have Operating Plans with provisions for operator-controlled manual Load shedding
that minimizes implemented in a timeframe adequate for mitigating the Emergency. Under frequency load
shedding, or UFLS, is designed to drop load to match generation. Under frequency generator relays are designed
to protect generators from operating at low frequencies for an extended period of time. These generator relays
should be set to trip to protect the generators if UFLS is unable to return the frequency to an acceptable value
within a set period of time. The first trip of under frequency generator relays should be AFTER the last trip of UFLS
relays. generators should trip after the UFLS
What is the most important consideration in load forecasting?
Weather
Historic load
Generator outages
,Energy Profile - answer>>Weather
In an island, what is the most appropriate AGC mode of operationConstant Interchange or Flat Tie
Off
Tie-line bias control
Constant or Flat Frequency - answer>>Normally, the Tie Line Bias control mode, which compares the Net Actual
Interchange to the Net Scheduled Interchange plus the Balancing Authority's frequency bias obligation, should be
used. However if a Balancing Authority is operating asynchronously (separated from the Interconnection), it
should switch to Flat Frequency Control since its tie lines are no longer connected to the Interconnection. It is
important for the Balancing Authority to maintain 60 Hz. In the Flat Frequency control mode, ACE is looking only at
the system frequency, not the Interchange portion of the ACE equation.
150 MW is flowing into the high side of a 200 MVA transformer. If the transformer windings have a 2 to 1 ratio
what MW value is flowing out of the low side winding of the transformer?
150 MW
75 MW
250 MW
200 MW - answer>>Power flow through a transformer is constant. The transformer steps up or down the voltage,
but power flow does not change. 150 MW
After a major disturbance, Interconnection frequency is remaining around 59.92Hz, your Balancing Authorities ACE
is 0 and have 200 MW of extra generation. What should the Balancing Authority system operator do?
Offer assistance to entities needing it.
Change the AGC mode to Flat Frequency
Shed Load.
Increase Generation. - answer>>After a disturbance where frequency declines significantly, the entire
Interconnection will react (automatically) with governors increasing generation and load decreasing slightly. Load
and Generation will rebalance at a lower frequency until generation is increased to return the Interconnection
frequency to 60.00 Hz. The best answer is to offer assistance to the deficient Balancing Authority by offering the
200 MW of reserves in a bilateral interchange transaction to help restore generation and load balance in the
Interconnection
,Offer assistance to entities needing it.
Incorrect The load in Balancing Authority "A" is currently 2000 MWs. The Interconnection frequency drops from
60.00 Hz to 59.70 Hz due to a disturbance in another Balancing Authority. What change in load can BA "A" expect
to see?
The load should increase approximately 40 MWs.
The load should decrease approximately 40 MWs.
The load should decrease approximately 20 MWs.
The load should increase approximately 20 MWs. limits - answer>>Load on the power system changes with
frequency. For every 1% change in frequency, load will change approximately 2% in the same direction. This load
change is primarily from induction motor load and not from resistive loads. -
In this scenario, the frequency dropped from 60.00 to 59.70, or .3 Hz. .3 Hz is .5% of 60 Hz. Therefore, load should
decrease 1%, or 20 MWs.
NERC Frequency Response Characteristic Survey Training Document
NERC Standard BAL-003
The load should decrease approximately 20 MWs.
Balancing Authority A expecting a 5,000 MW peak at Hour Ending 1500 hour, when 3,000 MWs of the 7,500 MW
of generation trips. That leaves 4,500 MWs of generation and 1,500 MW purchases to meet the peak demand.
When the purchases are cut by 1,000 MW to a new Net of -500 MW. Total of 5,000 MW in generation and firm
schedule to meet a forecasted 5,000 MW peak load. A factor to consider is a 5,000 MW forecast will most likely
result in a higher instantaneous load and that there is NO generation available for reserves. A Balancing Authority
in this situation would be in an Energy Emergency Alert Level 2 and will work with the Reliability Coordinator to
implement mitigating actions, such as, demand side management.
1.Notify the RC that this BA is contacting TOPs and LSE's to shed 200 MW of load.
2.Notify the RC that this BA is in EEA Level 1; notify all power plants to be on alert.
Notify the RC that this BA is in EEA Lev - answer>>Notify the RC that this BA is in an EEA Level 2; start all available
generation; schedule emergency interchange purchases; prepare to reduce firm load.
, During a system emergency, the System Operator can direct other Transmission Operators and Balancing
Authorities to violate which limit?
Interconnection Reliability Operating Limit
System Operating Limit
Available Transfer Capacity
Equipment parameters should be maintained within their established limits - answer>>Throughout the NERC
Standards requirements state that System Operating Limits must be respected. To ensure a reliable power system,
established limits can not be violated.
Application Equipment parameters should be maintained within their established limits
A simple power system is composed of three transmission lines that connect the generation area to the load area.
The three lines are different lengths but each line has the same impedance. Each line is initially loaded at 200 MW.
The SOL of each line is 400 MW. If one of the three lines trips, what will be the loading on the shortest remaining
line and will the SOL of either remaining line be violated?
300 MW/No
300 MW/Yes
400 MW/Yes
400 MW/No - answer>>300 MW/No NERC Standard TOP-001: Transmission Operators should not operate outside
identified limits and they shall ensure that a Real-time assessment is performed at least once every 30 minutes. In
this scenario, there is a total of 600 MW moving from generation to load across three lines with equal impedance.
When one of the three lines trips, the two remaining lines will each carry 1/2 of the total MW flow, or 300 MW.
The SOL of 400 MW will not be violated.
A request for a generator unit outage has been made to the planners. The planners must analyze this request to
ensure the generator will not be needed
ensure adequate real and reactive reserves
ensure system reliability
