NERC TEST QUESTIONS AND ANSWERS A+ GRADED. Buy Quality Materials!

NERC TEST QUESTIONS AND ANSWERS A+
GRADED. Buy Quality Materials!

1. You are an external Balancing Authority with a frequency bias of 20MW/0.1 Hz
that sees a frequency of 60.02 Hz due to a large loss of load in the contingent
Balancing Authority. If your generator governor control systems responded to
this frequency deviation, approximately how much of a generation change would
your Balancing Authority experience?

a. 1.2 MW

b. -4 MW

c. -40 MW

d. +4 MW
b
Net Actual Interchange minus Net Scheduled Interchange is what?

a. Always equal to the frequency bias contribution

b. The ACE equation

c. Inadvertent interchange

d. Meter error
c
3. Suppose your Interconnections operates at 59.97 Hz from one minute after
midnight (00:01) to noon (12:00) and operates at 60.05Hz from 12:01 to midnight
(24:00). What should you do if a time error correction was implemented just after
midnight to correct for the time error accumulated during this 24 hour period?

a. Change the frequency schedule to 59.98 Hz

b. Increase the net interchange schedule by 20% of the Balancing Authority's
frequency bias setting

c. Nothing, since you determined your Balancing Authority did not create the time

d. Change the frequency schedule to 60.02 Hz
a
4. If Balancing Authority ABC's RTU signal for power flow over ABC's Midway tie-
line with Balancing Authority XYZ is significantly in error, the ABC system
operator shall..

,a. Adjust the control settings (e.g. substitute a value for the tie-line power flow in
the energy management system) to compensate for the equipment error until

repairs can be made b. Not make any adjustments, but after the RTU gets
repaired, perform a true-up calculation on the inadvertent account

c. Call the XYZ Balancing Authority and set up an inadvertent interchange
schedule that is larger than the RTU error

d. Let the AGC system handle the problem
a
5. The normal and recommended mode of Automatic Generation Control (AGC) is
what?

a. Net tie-line

b. Flat 60Hz frequency

c. Predictor-corrector

d Tie line frequency bias
d
6 . A 100 MW generator at 50 MW output that has a 5% governor droop response
will respond Alomuch to a -0.15 HZ frequency deviation (Actual Frequency = 59.85
Hz)?

a -10 MW

b. -5 MW

c. +5 MW

d. +10 MW
c
7. Which of the following complies with the Control Performance Standard?

a. CPS1=90%

b. CPSI 95%

c. CPS1=135%

d. CPS1-205%
c

,8. A system disturbance has caused your Balancing Authority to lose tie-line
RTUs with a neighboring Balancing Authority and all frequency meters which
telemeter data into your energy management system. How would you operate
your AGC system for this scenario?

a. Implement a flat 60 Hz frequency control mode and do not change your
frequency bias

b. Leave the AGC system in tie-line bias control mode

c. Place all generating units on manual control and try as best you can to match
generation with load.

d. Implement a flat 60 Hz frequency control mode and increase your frequency
bias based on your system restoration procedure
c
9. Each Balancing Authority shall perform control error checks using tie-line MWh
meters to determine the accuracy of its control equipment. How often do NERC
Reliability Standards require each Balancing Authority to perform these control
error checks?

a. Every 10 minutes

b. Every hour

c. At least once per day

d. At least once per week
b
10. Upon telemetry failure of a generator's output, which of the following would
you expect to change?

a. Frequency

b. Area Control Error (ACE)

d. Tie-line flow

c. Actual Load (as displayed in the Control Room)
c
11. There is an inadvertent accumulation of 240MWh over generation that should
be used to schedule payback with a neighboring control area. If 50% is on peak,
which schedule will work?

a. 10 MW delivered hour ending 1300 Saturday through hour ending 1200 Sunday
(CST)

, b. 10 MW delivered all day Wednesday

c. 20 MW delivered hour ending 0100 through hour ending 1300 Monday (CST)

d. 24 MW delivered hour ending 0100 through hour ending 1000 Friday (CST)
c
12. Each Balancing Authority shall operate such that its clock-minute average of
Reporting ACE does not exceed its clock-minute Balancing Authority ACE Limit
(BAAL) for more than how many consecutive clock-minutes?

a. 15 minutes

b. 90 minutes

c. 30 minutes

d. 120 minutes
c
13. Each Frequency Response Sharing Group or Balancing Authority that is not a
member of a Frequency Response Sharing Group shall achieve an annual FRM

a. that is equal to or more negative than its FRO to demonstrate compliance with
Requirement R1.

b. that is equal to or more positive than its FRO to demonstrate compliance with
Requirement R1.

c. that is equal to or more positive than its IFRO to demonstrate compliance with

Requirement R1.

d. that is equal to or more negative than its Frequency Bias setting to
demonstrate compliance with Requirement R1.
a
14. Each Balancing Authority that is a member of a multiple Balancing Authority
Interconnection and is not receiving Overlap Regulation Service and is utilizing a
variable Frequency Bias Setting shall maintain a Frequency Bias Setting that is:

a. Less than zero at all times

b. Equal to or more negative than its Frequency Response Obligation when
Frequency varies from 60 Hz by more than +/-0.036 Hz.

c. None of the above