HSI Final Test UPDATED ACTUAL Questions and CORRECT Answers
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Course
HSI
Institution
HSI
HSI Final Test UPDATED ACTUAL
Questions and CORRECT Answers
The initial response to a frequency deviation is due to which of the following
1. Load / frequency response
2. AGC
3. Governor action
4. Interchange schedules
•3 and 4
•1 and 2
•2 and 3
•1 and 3 - CORRECT ANSWER- •1 a...
HSI Final Test UPDATED ACTUAL
Questions and CORRECT Answers
The initial response to a frequency deviation is due to which of the following
1. Load / frequency response
2. AGC
3. Governor action
4. Interchange schedules
•3 and 4
•1 and 2
•2 and 3
•1 and 3 - CORRECT ANSWER✔✔- •1 and 3
EMS and AGC have failed at 12:25 and generation must be controlled manually. The operator
calculates ACE to be +25 MWs. Load is expected to increase 100 MWs, and imports will
increase by 75 MWs at the top of the hour. What should the operator do?
•Maintain current generation level
•Decrease generation by 25 MWs
•Decrease generation by 50 MWs
•Increase generation by 25 MW - CORRECT ANSWER✔✔- •Decrease generation by 25
MWs
How is the Frequency Response Measure (FRM) of a Balancing Authority determined?
•lt is the average of the BA's frequency response for all the frequency deviations of the
previous year
•lt is the change in the BA's Net Interchange Actual for the largest frequency deviation during
the previous year
•lt is the previous year's Control Performance Standard 1 ( CPS1 ) score
,•It is the median of the BA's frequency response for the frequency deviation events identified
by NERC for the previous year - CORRECT ANSWER✔✔- •It is the median of the BA's
frequency response for the frequency deviation events identified by NERC for the previous
year
Sufficient Operating Reserve is defined as the capacity required to meet what?
•DOE specifications
•CPS and DCS
•CPS 1 & 2 only
•Capacity Standard - CORRECT ANSWER✔✔- •CPS and DCS
In your Interconnection , a generator tripped that was large enough to reduce the frequency
from 60.00 Hz to 59.94 Hz . Your Balancing Authority's Frequency Bias is -200 MW / 0.1 Hz
. How many MW would your system initially contribute to frequency support?
•120 MW
•80 MW
•100 MW
•200 MW - CORRECT ANSWER✔✔- •120 MW
Interconnection frequency is 59.80 Hz . Your ACE is a large negative value and your AGC is
pulsing your units down . What should you do
•Leave AGC in operation but investigate
•Place AGC in constant frequency control
•Place AGC in flat tie line control
•Suspend AGC and investigate - CORRECT ANSWER✔✔- •Suspend AGC and investigate
When a Balancing Authority's ACE value is the same sign as the frequency deviation , which
NERC control performance score is affected negatively
, •DCS
•CPS 1
•TEC
•BAAL - CORRECT ANSWER✔✔- •CPS 1
Correct Of the following , which control system would be affected by a difference in Net
Actual Interchange and Net Scheduled Interchange
•Reactive Control
•Turbine Governor Control
•Automatic Generation Control
•Automatic Voltage Regulator - CORRECT ANSWER✔✔- •Automatic Generation Control
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
•2
•0 - CORRECT ANSWER✔✔- • -20
A Balancing Authority has twenty units on governor control . The units have different
capacities that range from 200 MW to 1000 MW and droop settings from 2 % to 5 % . The
biggest adjustments in megawatt output in response to a frequency disturbance will be
provided by units that have _______________?
•large capacity and small droop setting
•large capacity and large droop setting
•small capacity and small droop setting
•small capacity and large droop setting - CORRECT ANSWER✔✔- •large capacity and
small droop setting
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