You are an external BA with a frequency bais of 20 MW/.1 Hz that sees a frequency of 60.02
due to a large loss of load in the contingent BA. If your generator governor control systems
responded to the frequency deviation approximately how much of a generation change
would you BA experience? - ANSWER -4MW
Net actual interchange minus Net scheduled interchange is what? -
ANSWER Inadvertent interchange
Suppose your interconnection operators at 59.97 Hz from one minute after midnight to
noon and operate at 60.05 Hz from 12:01 to midnight. What should you do if a time error
correction was implemented just after midnight to correct for the timer error accumulated
during this 24 hour period? - ANSWER Change frequency schedule to 59.98 Hz
If BA ABC's RT signal for power flow over ABC's midway tie-line with BA XYZ is significantly in
error, the ABC system operator shall - ANSWER Adjust the control setting (e.g.
substitute a value for the tie line power flow in the EMS) to compensate for the equipment
error until repairs can be made
The normal and recommended mode of AGC is what? - ANSWER Tie line frequency
bias
A 100 MW generator at 50 MW output has a 5% governor droop response will respond to
how much of a -.15Hz frequency deviation (actual frequency 59.85 Hz) - ANSWER +5
MW
1
,Which of the following complies with the control performance standard -
ANSWER CPS1=135%
A system disturbance has caused your BA to lose tie line RTUs with a neighboring BA and all
frequency meters which telemetered data into your EMS. How would you operate your GC
system for this scenario? - ANSWER Place all generating units on manual control and
try as best you can to match generation with load
Each BA shall perform control error checks using tie-line MWh meters to determine the
accuracy of its control equipment. How often do NERC reliability stands require each BA to
perform these control error checks? - ANSWER Every hour
Upon telemetry failure of a generators output, which of the following would you expect to
change - ANSWER Actual load (as displayed in the Control Room)
There is an inadvertent accumulation of 240 MWh over generation that should be used to
schedule payback with neighboring control area. If 50% is on peak, which schedule will
work? - ANSWER 20 MW delivered hour ending 0100 through HE 1300 Monday (CST)
Each BA shall operate such that its clock minute average of reporting ACE does not exceed its
clock minute BA ACE limit (BAAL) for more than how many consecutive minutes? -
ANSWER 30 minutes
Each frequency response sharing group or BA that is not a member of a Frequency Response
Sharing group shall achieve an annual FRM - ANSWER That is equal to or more
negative than its FRO to demonstrate compliance with requirement R1
Each BA that is a member of multiple BA interconnection and is not receiving overlap
regulation service and is utilizing a variable frequency bias setting shall maintain a frequency
bias setting that is : - ANSWER Less than zero at all times & equal to or more negative
than its Frequency Response obligation with Frequency varies from 60 Hz by more than +/-
.036 Hz
2
, Voltage reduction for load reduction should be performed where - ANSWER On the
Distribution system
You are a system operator in BA ABC and you notice that the voltage is steadily declining in a
known "weak" area of your system. You have exhausted all of your reactive resources in the
weak area and you have noticed that the MVAR flows across the three transmission lines
connecting this area to the system are very high. Per NERC reliability standards, what shall
you do? - ANSWER Manually shed enough load to prevent voltage collapse in this area
Which of the following is not a reactive resource, Ractor bank, Transformer, Capacitor bank,
Synchronous condenser - ANSWER Transformer
If the voltage at substation A is 235 kV and the voltage at substation b is 230 kV, then it can
be concluded that the reactive power MVARs flows how - ANSWER From substation A
to substation B
Which of the following are dynamic reactive resources
Synchronous Condenser
Capacitor Banks
Reactor Bank
Generator - ANSWER Synchronous Condenser, Generator
The Roxboro-milburnie Blak 230kV line has 80 MW and 60 MVAR flowing into the Milburnie
Substation, what is the power factor - ANSWER 80%
If a generator is underexcited, then it is - ANSWER Absorbing VARs
A lightly loaded 500 Kv transmission line has a capacitive effect which tends to -
ANSWER Cause high voltage problems that are corrected by placing reactor banks in
service
3
due to a large loss of load in the contingent BA. If your generator governor control systems
responded to the frequency deviation approximately how much of a generation change
would you BA experience? - ANSWER -4MW
Net actual interchange minus Net scheduled interchange is what? -
ANSWER Inadvertent interchange
Suppose your interconnection operators at 59.97 Hz from one minute after midnight to
noon and operate at 60.05 Hz from 12:01 to midnight. What should you do if a time error
correction was implemented just after midnight to correct for the timer error accumulated
during this 24 hour period? - ANSWER Change frequency schedule to 59.98 Hz
If BA ABC's RT signal for power flow over ABC's midway tie-line with BA XYZ is significantly in
error, the ABC system operator shall - ANSWER Adjust the control setting (e.g.
substitute a value for the tie line power flow in the EMS) to compensate for the equipment
error until repairs can be made
The normal and recommended mode of AGC is what? - ANSWER Tie line frequency
bias
A 100 MW generator at 50 MW output has a 5% governor droop response will respond to
how much of a -.15Hz frequency deviation (actual frequency 59.85 Hz) - ANSWER +5
MW
1
,Which of the following complies with the control performance standard -
ANSWER CPS1=135%
A system disturbance has caused your BA to lose tie line RTUs with a neighboring BA and all
frequency meters which telemetered data into your EMS. How would you operate your GC
system for this scenario? - ANSWER Place all generating units on manual control and
try as best you can to match generation with load
Each BA shall perform control error checks using tie-line MWh meters to determine the
accuracy of its control equipment. How often do NERC reliability stands require each BA to
perform these control error checks? - ANSWER Every hour
Upon telemetry failure of a generators output, which of the following would you expect to
change - ANSWER Actual load (as displayed in the Control Room)
There is an inadvertent accumulation of 240 MWh over generation that should be used to
schedule payback with neighboring control area. If 50% is on peak, which schedule will
work? - ANSWER 20 MW delivered hour ending 0100 through HE 1300 Monday (CST)
Each BA shall operate such that its clock minute average of reporting ACE does not exceed its
clock minute BA ACE limit (BAAL) for more than how many consecutive minutes? -
ANSWER 30 minutes
Each frequency response sharing group or BA that is not a member of a Frequency Response
Sharing group shall achieve an annual FRM - ANSWER That is equal to or more
negative than its FRO to demonstrate compliance with requirement R1
Each BA that is a member of multiple BA interconnection and is not receiving overlap
regulation service and is utilizing a variable frequency bias setting shall maintain a frequency
bias setting that is : - ANSWER Less than zero at all times & equal to or more negative
than its Frequency Response obligation with Frequency varies from 60 Hz by more than +/-
.036 Hz
2
, Voltage reduction for load reduction should be performed where - ANSWER On the
Distribution system
You are a system operator in BA ABC and you notice that the voltage is steadily declining in a
known "weak" area of your system. You have exhausted all of your reactive resources in the
weak area and you have noticed that the MVAR flows across the three transmission lines
connecting this area to the system are very high. Per NERC reliability standards, what shall
you do? - ANSWER Manually shed enough load to prevent voltage collapse in this area
Which of the following is not a reactive resource, Ractor bank, Transformer, Capacitor bank,
Synchronous condenser - ANSWER Transformer
If the voltage at substation A is 235 kV and the voltage at substation b is 230 kV, then it can
be concluded that the reactive power MVARs flows how - ANSWER From substation A
to substation B
Which of the following are dynamic reactive resources
Synchronous Condenser
Capacitor Banks
Reactor Bank
Generator - ANSWER Synchronous Condenser, Generator
The Roxboro-milburnie Blak 230kV line has 80 MW and 60 MVAR flowing into the Milburnie
Substation, what is the power factor - ANSWER 80%
If a generator is underexcited, then it is - ANSWER Absorbing VARs
A lightly loaded 500 Kv transmission line has a capacitive effect which tends to -
ANSWER Cause high voltage problems that are corrected by placing reactor banks in
service
3
