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My NERC(questions with complete solutions)graded A+ already passed
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My NERC(questions with complete solutions)graded A+ already passed
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My NERCA mis operation occurred when an overhead ground wire on a 230KV transmission line between two
substations broke and fell across A phase of the line. One of the line circuit breakers failed to open
causing the breaker failure relay to pick up and as a result tripped the entire substation bus off line that
the failed circuit breaker was feeding off of. Who is charged with the responsibility to develop
procedures to ensure mis operations are reviewed and analyzed to determine proper mitigation plans? -
correct answer ✔✔D. Regional Reliability Organization for the area.
The transmission operator that you work for is installing new relays on some of their major transmission
tie lines using newer technology. Who should your company notify before work is begun? - correct
answer ✔✔C. Neighboring Transmission Operators, Balancing authorities, and Generator Operators.
When shall the transmission Operators and balancing authorities review and update emergency plans? -
correct answer ✔✔A. Annually
When the responsible entity tags a dynamic schedule, what values should it use for the energy profile? -
correct answer ✔✔Expected average MW profile for each hour.
You are reliability coordinator in the eastern interconnection. Transmission Operator AB is in your
Reliability Area. Transmission Operator AB reports that a 600 MW generator that tripped offline has
caused an overload of a 345/138/13KV Inter-tie Transformer Bank. You realize that if the overloaded
transformer trips off line, it would create an IROL. There are several Interchange Transactions that have
parallel flows that are flowing through that transformer. What should you do? - correct answer ✔✔D.
Issue a TLR on enough interchange transactions starting with the lowest priority and working up, until
enough are curtailed to relieve the transformer from its overload condition.
Which entities may determine the deviation of a dynamic schedule constitutes a Reliability concern?
Also, what entity must notify of that determination and the reason for the determination? - correct
answer ✔✔B. A Reliability Coordinator or transmission operator makes the determination and must
notify the purchasing-selling entity.
Which entity would make the original request for an EEA event? - correct answer ✔✔A. Balancing
Authority
,At 0620 local time, interconnection frequency is 60.025 Hz. Balancing Authority A's ACE at that time is -
100MW and it's L10 value is 50MW. By 0625, it's ACE has changed to -25MW and the frequency has
decreased to 60.012 Hz. By 0630, A's ACE is -5MW and frequency is 60.001 Hz. For the 10 minute period,
balancing authority A's average ACE was 55MW. What control performance standard has the BA
violated(if any)? - correct answer ✔✔B. CPS 2
The daily plan is usually generated using unit committee and __________ software. - correct answer
✔✔C.Power flow simulation
A severe lightning storm has hit your transmission system. Two 345KV lines have been damaged and are
unable to be reenergized. Two large generators of 500MW and 700MW have tripped off line. No
additional generators are available to bring on line. The parallel 230KV and 138KV lines are loaded at
their emergency limits. As a system operator, what should you do? - correct answer ✔✔A. Curtail load.
At the end of September, Balancing Authority C had CPS2 violations. Did Balancing Authority C pass or
fail their CPS2 requirements for the month? What was their final CPS2 percentage score for the month of
September? - correct answer ✔✔B. Passed. With 91.7%
Transmission Operators frequently use distance relays to protect their transmission lines. These distance
relay schemes quite often use ____ zones of protection. - correct answer ✔✔A. three
You are ready to restore power to a generator facility. Which of the following transmission lines would be
the best choice to energize the facility? - correct answer ✔✔A. 10 mile, over head TX line
When there is a problem in another part of the interconnection, a RC is expected to do all of the
following EXCEPT? - correct answer ✔✔b. Disseminate information outside the RC's area
You experience a full system shutdown. You are in the process of restoring load and you are concerned
about re-collapsing the system. Which is the best approach in the restoration process that will help
ensure your system will be restored successfully? - correct answer ✔✔B. Maintain frequency 59.5 HZ
and 60.5 HZ
, If a high voltage direct current tie is on the Scheduling Path for a transaction, then the _____, shall
coordinate the Interchange Schedule with the Transmission Operator of the HVDC tie. - correct answer
✔✔C. Sending and Receiving Authorities
A pseudo tie can be used to_____ - correct answer ✔✔b. Reflect jointly owned generation located in
another BA in ACE
If the frequency bias setting is equal to the frequency response of a balancing authority and a frequency
decline is caused by a sudden loss of generation in an external balancing area, what will be the result? -
correct answer ✔✔A. ACE will not change due to the disturbance
Strategically placing generators on line in a Balancing Area to alter or change the flow of active and
reactive power on a transmission system is _____ - correct answer ✔✔B. generation re-dispatch
When a system is on the verge of voltage collapse and nothing else can be done to alleviate the problem,
operating personnel should _______ - correct answer ✔✔A. reduce load in the area with the low voltage
If analysis tools are unavailable due to planned maintenance activities, it shall be the responsibility of the
Reliability Coordinator to have procedures in place to ____ - correct answer ✔✔D. mitigate the effects of
analysis tools outages
Generators are often equipped with protective relays to detect operation significantly outside of the
rated capability curve of the unit. When activated, these relays may initiate an.. - correct answer ✔✔C.
unit alarm, automatic runback and/or unit trip
Interchange Schedules may be implemented between________ - correct answer ✔✔C. adjacent
balancing authorities
A 500 MVA transformer has 400 MW of load with 300 MVAR. What is the power factor? - correct answer
✔✔A. 80% (0.8)
Which of the following combinations represent the best generation control performance (in terms of
helping the interconnections frequency) by a Balancing Area? - correct answer ✔✔B. ACE is positive
while frequency error is negative
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