NERC Contingency Analysis and Reliability Exam Review
Questions and Answers.
What is an Operating Instruction? - Correct Answer Real-time Operating personnel
command to change or preserve the state of an element of the BES
The Transmission Operator experiences an unexpected line outage which results in the
subsequent loading of a parallel line at 101% of its SOL, what action should the
Transmission Operator take?Select all that apply. - Correct Answer Inform the Reliability
Coordinator
Take the appropriate action to return the system to within normal limits
A Generator Operator receives an Operating Instruction from its Transmission Operator
to bring on additional generation to mitigate a low voltage situation. The Generator
Operator must comply with the Operating Instruction unless: - Correct Answer It results
in safety concerns or environmental violations
A Transmission Operator performs a Real-time Assessment that identifies a SOL
exceedance. What should the Transmission Operator do next?
Contact the Reliability Coordinator and ask for assistance - Correct Answer Initiate its
Operating Plan to mitigate the SOL exceedance
Unless it's an emergency, Transmission Operators should not remove Bulk Electric
System facilities from service until which of the following actions is completed? - Correct
Answer A Real-time Assessment of the transmission facility outage is completed
When another Transmission Operator requests emergency actions to be implemented
in your area, what is the expectation? - Correct Answer The requesting TOP has also
implemented emergency actions
Which are the three types of limits to consider when determining system limits? Select
all that apply.
Angle stability
Impedance
Thermal
, Voltage - Correct Answer Angle stability
Thermal
Voltage
A transmission system must be operated so that which of the following will not occur as
a result of a single contingency? - Correct Answer Instability, uncontrolled separation, or
cascading outages
Which of the following actions would a Transmission Operator be expected to take, or
direct others to take, to mitigate SOL and IROL violations?Select all that apply.
Shed load
Change limit
Disconnect from neighbors
Change the output of generators
Reduce Interchange - Correct Answer Change the output of generators
Reduce Interchange
Shed load
Why is it necessary to report SOL and IROL exceedances to the Reliability
Coordinator? - Correct Answer The Reliability Coordinator will then evaluate actions
being taken and direct additional corrective actions as needed
Which of the following must a Transmission Operator monitor to determine SOL
exceedances within its area?Select all that apply.
Status of Remedial Action Schemes in its TOP area
BES Facilities within its TOP area
Status, voltage, and flow data outside its TOP area identified as necessary
Non-BES facilities within its TOP area identified as necessary - Correct Answer Status
of Remedial Action Schemes in its TOP area
Questions and Answers.
What is an Operating Instruction? - Correct Answer Real-time Operating personnel
command to change or preserve the state of an element of the BES
The Transmission Operator experiences an unexpected line outage which results in the
subsequent loading of a parallel line at 101% of its SOL, what action should the
Transmission Operator take?Select all that apply. - Correct Answer Inform the Reliability
Coordinator
Take the appropriate action to return the system to within normal limits
A Generator Operator receives an Operating Instruction from its Transmission Operator
to bring on additional generation to mitigate a low voltage situation. The Generator
Operator must comply with the Operating Instruction unless: - Correct Answer It results
in safety concerns or environmental violations
A Transmission Operator performs a Real-time Assessment that identifies a SOL
exceedance. What should the Transmission Operator do next?
Contact the Reliability Coordinator and ask for assistance - Correct Answer Initiate its
Operating Plan to mitigate the SOL exceedance
Unless it's an emergency, Transmission Operators should not remove Bulk Electric
System facilities from service until which of the following actions is completed? - Correct
Answer A Real-time Assessment of the transmission facility outage is completed
When another Transmission Operator requests emergency actions to be implemented
in your area, what is the expectation? - Correct Answer The requesting TOP has also
implemented emergency actions
Which are the three types of limits to consider when determining system limits? Select
all that apply.
Angle stability
Impedance
Thermal
, Voltage - Correct Answer Angle stability
Thermal
Voltage
A transmission system must be operated so that which of the following will not occur as
a result of a single contingency? - Correct Answer Instability, uncontrolled separation, or
cascading outages
Which of the following actions would a Transmission Operator be expected to take, or
direct others to take, to mitigate SOL and IROL violations?Select all that apply.
Shed load
Change limit
Disconnect from neighbors
Change the output of generators
Reduce Interchange - Correct Answer Change the output of generators
Reduce Interchange
Shed load
Why is it necessary to report SOL and IROL exceedances to the Reliability
Coordinator? - Correct Answer The Reliability Coordinator will then evaluate actions
being taken and direct additional corrective actions as needed
Which of the following must a Transmission Operator monitor to determine SOL
exceedances within its area?Select all that apply.
Status of Remedial Action Schemes in its TOP area
BES Facilities within its TOP area
Status, voltage, and flow data outside its TOP area identified as necessary
Non-BES facilities within its TOP area identified as necessary - Correct Answer Status
of Remedial Action Schemes in its TOP area
