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NERC SOS 326 Questions And Answers Updated
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NERC SOS 326 Questions And Answers Updated2023 -2024
Quiz :If a Balancing Authority does not comply with the Control Performance
Standard, the Balancing Authority is not permitted to provide which of the
following for any other Balancing Authority entities? - Answer :Regulation of
other services related to control performance
Quiz :1. It is the obligation of each Balancing Authority to fulfill its
commitment to the Interconnection and not ________ the other balancing
Authorities in the Interconnection - Answer :Burden
Quiz :A Balancing Authority is performing Overlap Regulation Service for
another Balancing Authority. Which of the following statements applies to the
Balancing Authority providing this service? - Answer :The Balancing Authority's
Frequency Bias Setting shall be modified to reflect the combined Frequency
Bias Setting of both Balancing Areas.
Quiz :Balancing Authority A is currently reading a system frequency of 59.95
Hz. Its Net Actual Interchange is +100 MW and its Net Scheduled Interchange is
+200 MW. If Balancing Authority A's frequency bias setting is 100 MW/0.1 Hz,
Balancing Authority A's AGC is pulsing its generators to do what? -
Answer :Increase MW output
Quiz :Which of the following is a Real-time measurement of a Balancing
Authority's control performance - Answer :BAAL
Quiz :Each Balancing Authority shall monitor which of the following against
two standards: CPS1 and BAAL? - Answer :Control performance
Quiz :In the calculating of CPS1, which of the below conditions would
contribute to ta favorable score? - Answer :Negative ACE when frequency is
high,
positive ACE when frequency is low.
Quiz :If the frequency bias setting is a higher value than the frequency
response of a Balancing Authority and a frequency decline is caused by a
sudden loss of generation is an external balancing area, what will be the
,result? - Answer :A- The ACE will be a negative value and AGC will increase
generation
Quiz :Which statement best describes the CPS1 requirement? - Answer :The
Responsible Entity shall operate such that its CPS1 is greater than or equal to
100% for the preceding 12 month period.
Quiz :To be in compliance with the BAL-001 requirements, a Balancing
Authority must have which of the following? - Answer :CPS1 greater than or
equal to 100% and ACE does not exceed the BAAL more than 30 consecutive
minutes
Quiz :Actual System Frequency (FA) is 60.03 Hz, a Balancing Authority is under-
generating slightly to prepare for an upcoming interchange transaction. What
is the Balancing Authority doing? - Answer :The BA is helping the
Interconnection Frequency.
Quiz :You are a Balancing Authority Operator. A neighboring Balancing
Authority in the Interconnection suddenly had a 500 MW generator to trip off
line by generator differential. What part of the ACE equation,
ACE = (NIA-NIS) - 10B (FA-FS) - IME, allows you and other Balancing Authorities
in the Interconnection to contribute to the stabilization of the Interconnection
frequency error? - Answer :10B (FA-FS)
Quiz :In your Interconnection, a generator tripped that was large enough to
reduce the frequency from 60.000 Hz to 59.940 Hz. Your Balancing Authority's
Frequency Bias is 200 MW/0.1 Hz. How many MW would your system initially
contribute to frequency support? - Answer :120 MW
Quiz :Which of the following would be a use of the IME portion of the ACE
equation? - Answer :Represent flow of a tie line with an out of service meter.
Quiz :What happens to the Balancing Authority ACE Limit (BAAL) when
frequency moves farther away from scheduled frequency? - Answer :The limit
gets more restrictive.
Quiz :How is the Frequency Response Obligation (FRO) of a Frequency
Response Sharing Group determined? - Answer :By adding the individual FRO's
of each member.
,Quiz :A Balancing Authority has an ACE reading of -100MWs and frequency is
60.12 Hz. Is the BA exceeding the BAAL? - Answer :No
Quiz :A Balancing Authority that is a member of a Generation Reserve Sharing
Group is the Responsible Entity only in periods during which the Balancing
Authority is not in active status under the applicable agreement or the
governing rules for the Generation Reserve Sharing Group. - Answer :False
Quiz :The minimum compliance for NERC DCS is - Answer :100% for all
reportable disturbances.
Quiz :A generator tripped in your Interconnection that was large enough to
cause frequency to drop to 59.950 Hz. Your Balancing Authority's Frequency
Bias is 120 MW/0.1 Hz. How many MWs would your system initially contribute
to frequency support? - Answer :60 MWs
Quiz :A Balancing Authority has a normal load of around 8500 MW. Its most
severe single contingency is a 700-MW coal-fired steam unit. At 0810 the ACE
value was at -55 MW when a 600-MW generator in the Balancing Authority's
northern area tripped off line as the result of a generator differential. This
resulted in a large negative ACE for the Balancing Authority. What value must
the ACE return to and in what time frame to avoid a DCS violation? - Answer :-
55 MW ACE in 15 minutes
Quiz :How is the Frequency Response Measure (FRM) of a Balancing Authority
determined? - Answer :It is the median of the BA's frequency response for the
frequency deviation events identified by NERC for the previous year.
Quiz :The Contingency Reserve Restoration period is ________. -
Answer :ninety minutes
Quiz :When does the Contingency Reserve Restoration Period begin? -
Answer :At the end of the Disturbance Recovery Period.
Quiz :A Balancing Authority has a normal load of around 8500 MW. Its most
severe single contingency is a 700-MW coal-fired steam unit. At 0810 the ACE
value was at -55 MW when a 600-MW generator in the Balancing Authority's
northern area tripped off line as the result of a generator differential. This
resulted in a large negative ACE for the Balancing Authority. What value must
, the ACE return to and in what time frame to avoid a DCS violation? - Answer :-
55 MW ACE in 15 minutes
Quiz :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 DCS evaluation based on the NERC DCS criteria? - Answer :The
loss of a 950 MW generating unit at 100%.
Quiz :If a Reserve Sharing Group member has experienced a Reportable
Disturbance condition but does not call for reserve activation from other
members, the entire group shall still be considered to be in a disturbance
condition. - Answer :False
Quiz :Which of the following is a potential source of Contingency Reserve?
1. Offline generation that takes 10 minutes to start at full output.
2. Online generation at 100% capacity
3. Controllable load resources.
4. Voltage reductions. - Answer :1 and 3
Quiz :The minimum compliance for NERC DCS is _____________? -
Answer :100% for all reportable disturbances.
Quiz :How is the Frequency Response Measure (FRM) of a Balancing Authority
determined? - Answer :It is the median of the BA's frequency response for the
frequency deviation events identified by NERC for the previous year.
Quiz :In order to achieve sufficient Frequency Response, the Frequency
Response Measure (FRM) of a Balancing Authority or Frequency Response
Sharing Group must be: - Answer :Equal to or more negative than the
Frequency Response Obligation (FRO)
Quiz :A Balancing Authority is performing Overlap Regulation Service for
another Balancing Authority. Which of the following statements applies to the
Balancing Authority providing this service? - Answer :The Balancing Authority's
Frequency Bias Setting shall be modified to reflect the combined Frequency
Bias Setting of both Balancing Areas.
Quiz :Balancing Authority A is currently reading a system frequency of 59.95
Hz. Its Net Actual Interchange is +100 MW and its Net Scheduled Interchange is
+200 MW. If Balancing Authority A's frequency bias setting is 100 MW/0.1 Hz,
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