NERC Update 2024/2025 Questions with Correct
Solutions | Latest
The Disturbance Control Standard measures a Balancing Authority's response to a rapid
loss of _____________.
demand for energy.
interchange.
ACE.
supply of energy. - ANSWER supply of energy
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 Disturbance
Control Performance evaluation based on the NERC DCS criteria?
The loss of a 950 MW generating unit at 100% output.
The loss of 3 generating units totaling 1,300 MW over a period of 3 hours.
The loss of a 750 MW generating unit at 100% output.
The loss of 715 MW of firm load. - ANSWER The loss of a 950 MW generating unit at
100% output.
Balancing Authority informs the Reliability Coordinator that the projected load in a
Balancing Area for the next four hours (over the morning peak) is trending above the
available generation that had been committed for the day. Operating Reserves will be
required to be converted into energy to cover the shortfall. Which Energy Emergency
Alert (EEA) level should the RC declare?
No EEA should be declared until load shed is expected.
,EEA 1
EEA 2
EEA 3 - ANSWER EEA 1
A Balancing Authority anticipating an operating capacity or energy emergency shall
perform all actions necessary which includes:
Bringing on all available generation
All answers are correct
Preparing to reduce firm load
Postponing equipment maintenance - ANSWER All answers are correct
As a Transmission Operator, you realize that the voltage level is starting to decline in the
North West part of the system. Which of the following devices should you, as a
Transmission Operator, be able to operate, and/or have another entity operate to raise
the voltage level back to normal in the North West part of the system?
Generator Reactive Output
Transformer Underload Tap Changers
All answers are correct
Shunt Capacitor Banks - ANSWER All answers are correct
If a Balancing Authority, Reserve Sharing Group is experiencing conditions where all
available resources are committed to meet firm load, firm transactions, and reserve
commitments, what does the deficient entity need to request their Reliability
Coordinator to issue?
Energy Emergency Warning
,Energy Emergency Alert Level 2
Energy Emergency Alert Level 3
Energy Emergency Alert Level 1 - ANSWER Energy Emergency Alert Level 1
One of the functions of underfrequency load shedding is to ______________ within an
electrical island that may have been created by a system disturbance.
establish balance between load and interchange
balance generation and load
stabilize balance between generators
stabilize the Interconnection - ANSWER balance generation and load
A Balancing Authority that is operating asynchronously (separated from the
Interconnection) should switch its AGC to which mode __________.
flat frequency control
tie line bias control
manual control
flat tie-line control - ANSWER flat frequency control
During a system restoration, what is the system operators priority?
Interconnection frequency
Restoration of customer load
Restoration of interchange
Restoration of off-site startup power to generating facilities - ANSWER Restoration of
off-site startup power to generating facilities
, If multiple lines trip resulting in parallel lines overloading and voltage decreasing, the
system operator should first consider which mitigating actions?
Re-dispatch or bring on additional generation
Shed load to reduce the powerflow on the overloaded lines
Open the line breakers to the overloaded lines.
Curtail Interchange Scheduled to the low voltage area - ANSWER Re-dispatch or bring on
additional generation
A Balancing Authority foresees or is experiencing conditions where all available
resources are committed to meet firm load, firm transactions. The BA should request
which level of the Energy Emergency Alerts?
Energy Emergency Alert Level 1
Energy Emergency Alert Level 4
Energy Emergency Alert Level 2
Energy Emergency Alert Level 3 - ANSWER Energy Emergency Alert Level 1
The System Operator experiences a major transmission system disturbance which
results in a large loss of load. Which of the following results is most likely to occur?
an increase in system frequency
an increase in system voltage in a wide-area
a decrease in system voltage
a decrease in system frequency - ANSWER an increase in system frequency
Solutions | Latest
The Disturbance Control Standard measures a Balancing Authority's response to a rapid
loss of _____________.
demand for energy.
interchange.
ACE.
supply of energy. - ANSWER supply of energy
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 Disturbance
Control Performance evaluation based on the NERC DCS criteria?
The loss of a 950 MW generating unit at 100% output.
The loss of 3 generating units totaling 1,300 MW over a period of 3 hours.
The loss of a 750 MW generating unit at 100% output.
The loss of 715 MW of firm load. - ANSWER The loss of a 950 MW generating unit at
100% output.
Balancing Authority informs the Reliability Coordinator that the projected load in a
Balancing Area for the next four hours (over the morning peak) is trending above the
available generation that had been committed for the day. Operating Reserves will be
required to be converted into energy to cover the shortfall. Which Energy Emergency
Alert (EEA) level should the RC declare?
No EEA should be declared until load shed is expected.
,EEA 1
EEA 2
EEA 3 - ANSWER EEA 1
A Balancing Authority anticipating an operating capacity or energy emergency shall
perform all actions necessary which includes:
Bringing on all available generation
All answers are correct
Preparing to reduce firm load
Postponing equipment maintenance - ANSWER All answers are correct
As a Transmission Operator, you realize that the voltage level is starting to decline in the
North West part of the system. Which of the following devices should you, as a
Transmission Operator, be able to operate, and/or have another entity operate to raise
the voltage level back to normal in the North West part of the system?
Generator Reactive Output
Transformer Underload Tap Changers
All answers are correct
Shunt Capacitor Banks - ANSWER All answers are correct
If a Balancing Authority, Reserve Sharing Group is experiencing conditions where all
available resources are committed to meet firm load, firm transactions, and reserve
commitments, what does the deficient entity need to request their Reliability
Coordinator to issue?
Energy Emergency Warning
,Energy Emergency Alert Level 2
Energy Emergency Alert Level 3
Energy Emergency Alert Level 1 - ANSWER Energy Emergency Alert Level 1
One of the functions of underfrequency load shedding is to ______________ within an
electrical island that may have been created by a system disturbance.
establish balance between load and interchange
balance generation and load
stabilize balance between generators
stabilize the Interconnection - ANSWER balance generation and load
A Balancing Authority that is operating asynchronously (separated from the
Interconnection) should switch its AGC to which mode __________.
flat frequency control
tie line bias control
manual control
flat tie-line control - ANSWER flat frequency control
During a system restoration, what is the system operators priority?
Interconnection frequency
Restoration of customer load
Restoration of interchange
Restoration of off-site startup power to generating facilities - ANSWER Restoration of
off-site startup power to generating facilities
, If multiple lines trip resulting in parallel lines overloading and voltage decreasing, the
system operator should first consider which mitigating actions?
Re-dispatch or bring on additional generation
Shed load to reduce the powerflow on the overloaded lines
Open the line breakers to the overloaded lines.
Curtail Interchange Scheduled to the low voltage area - ANSWER Re-dispatch or bring on
additional generation
A Balancing Authority foresees or is experiencing conditions where all available
resources are committed to meet firm load, firm transactions. The BA should request
which level of the Energy Emergency Alerts?
Energy Emergency Alert Level 1
Energy Emergency Alert Level 4
Energy Emergency Alert Level 2
Energy Emergency Alert Level 3 - ANSWER Energy Emergency Alert Level 1
The System Operator experiences a major transmission system disturbance which
results in a large loss of load. Which of the following results is most likely to occur?
an increase in system frequency
an increase in system voltage in a wide-area
a decrease in system voltage
a decrease in system frequency - ANSWER an increase in system frequency
