Nerc test 3 Questions with Verified Answers, 100% Guarantee Pass Score
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Course
NERC
Institution
NERC
A CPS1 violation is an indication that :
A BA's ACE is hindering frequency .
A BAS ACE is helping frequency
A BA's Frequency Bias is set too high .
A BA is not meeting its L10 . Correct Answer-A BA's ACE is hindering frequency .
A Balancing Authority has a normal generation cap...
Nerc test 3 Questions with Verified
Answers, 100% Guarantee Pass Score
A CPS1 violation is an indication that :
A BA's ACE is hindering frequency .
A BAS ACE is helping frequency
A BA's Frequency Bias is set too high .
A BA is not meeting its L10 . Correct Answer-A BA's ACE is hindering frequency .
A Balancing Authority has a normal generation capacity of approximately 9400 MW and its most
severe single contingency is an 800 MW coal fired steam unit . At 1430 , with an ACE value of 20
MW , a 600 - MW generator trips 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 ?
Must return ACE to 20 MW in 15 minutes .
Must return ACE to 0 MW in 10 minutes .
This does not constitute a reportable disturbance .
Must return ACE to 0 MW in 15 minutes . Correct Answer-This does not constitute a reportable
disturbance .
The DCS criteria applies to a sudden loss of generation that exceeds 80 % of the Balancing
Authorities most severe single contingency , or in this case 80 % of 800 MWs which is 640 MWs .
Since only 600 MWs were lost , the DCS criteria does not apply . However , the BA should return
ACE as quickly as possible .
,Balancing Authority A is currently reading a system frequency of 59.98 Hz . Its Net Actual
Interchange is +100 MW and its Net Scheduled Interchange is +100 MW . If Balancing Authority
A's frequency bias setting is 100 MW / 0.1 HZ , what is ACE ?
20
-20
0
2 Correct Answer--20
On problems like this actual do the ace equation
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 +120 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 ___________
Remain at current MW output level
Increase MW output
Decrease MW output
Increase excitation on the field windings Correct Answer-Take the two portions of the ACE
equation separately . 1 ) Frequency is low which contributes to a negative ACE . 2 ) Actual
Interchange is less than scheduled which also causes negative ACE . Without even calculating
the ACE value , it is evident that ACE will be negative and therefore AGC should be pulsing
generators to increase their MW output
Balancing Authority " A " is importing 225 MWs , and is only scheduled to import 200 MWs . The
BA's Bias Setting is 200 MWS / .1 Hz and frequency is 59.99 Hz . What does ACE indicate ?
,45 MW over - generating
20 MW over - generating
20 MW under - generating
45 MW under generating Correct Answer-45 MW under generating
Plug into the ace equation!
A Balancing Authority's inadvertent accumulation reflects over - generation during on peak
hours . When system load is decreasing , what actions could a Balancing Authority system
operator take to limit additional on peak inadvertent accumulation
1. Decrease transactions into their system
2. Increase transactions into their system
3. Decrease generation
4. Increase generation
02 and 3
01 and 4
2 and 4
1 and 3 Correct Answer-1 and 3
The Frequency Response Measure ( FRM ) of a Balancing Authority is determined by using actual
data from past frequency events . What provides Interconnection Frequency support ?
All generators in North America will increase generation according to their size .
, All generators ' automatic generation control response to ACE .
Generator governor response within the Interconnection resulting in an increase of generation .
Each generator has a fixed amount of support to provide regardless of status and size . Correct
Answer-Generator governor response within the Interconnection resulting in an increase of
generation .
At the end of the business day , two adjacent Balancing Authorities must agree with which of
the below actual operating values regarding Inadvertent Interchange ?
1. The hourly integrated values of Net Interchange Schedule .
2. The hourly values of each Interchange Transaction .
3. The hourly integrated megawatt values of individual interconnecting the lines .
4. The hourly integrated values of Net Actual Interchange .
1 , 2 , 3 and 4
1 and 4
2 and 3
2 and 4 Correct Answer-1 and 4
Which of the following are true about system frequency ?
lt is related to the speed of the generators tied to the system .
lt is an indication of generation to load demand balance .
It is measured in Hertz .
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