HSI Final Test Questions With Correct Answers

HSI Final Test Questions With Correct
Answers

The initial response to a frequency deviation is due to which of the following
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1. Load / frequency response
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2. AGC
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3. Governor action
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4. Interchange schedules
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•3 and 4
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•1 and 2
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•2 and 3
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•1 and 3 - CORRECT ANSWER✔✔-•1 and 3
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EMS and AGC have failed at 12:25 and generation must be controlled manually.
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The operator calculates ACE to be +25 MWs. Load is expected to increase 100
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MWs, and imports will increase by 75 MWs at the top of the hour. What should
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the operator do?
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•Maintain current generation level | | |




•Decrease generation by 25 MWs | | | |




•Decrease generation by 50 MWs | | | |

,•Increase generation by 25 MW - CORRECT ANSWER✔✔-•Decrease generation
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by 25 MWs
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How is the Frequency Response Measure (FRM) of a Balancing Authority
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determined?


•lt is the average of the BA's frequency response for all the frequency deviations
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of the previous year
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•lt is the change in the BA's Net Interchange Actual for the largest frequency
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deviation during the previous year | | | |




•lt is the previous year's Control Performance Standard 1 ( CPS1 ) score
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•It is the median of the BA's frequency response for the frequency deviation
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events identified by NERC for the previous year - CORRECT ANSWER✔✔-•It is the
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median of the BA's frequency response for the frequency deviation events
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identified by NERC for the previous year | | | | | |




Sufficient Operating Reserve is defined as the capacity required to meet what?
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•DOE specifications |




•CPS and DCS | |




•CPS 1 & 2 only | | | |




•Capacity Standard - CORRECT ANSWER✔✔-•CPS and DCS
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In your Interconnection , a generator tripped that was large enough to reduce the
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|frequency from 60.00 Hz to 59.94 Hz . Your Balancing Authority's Frequency Bias
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,is -200 MW / 0.1 Hz . How many MW would your system initially contribute to
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frequency support? |




•120 MW |




•80 MW|




•100 MW |




•200 MW - CORRECT ANSWER✔✔-•120 MW
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Interconnection frequency is 59.80 Hz . Your ACE is a large negative value and
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your AGC is pulsing your units down . What should you do
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•Leave AGC in operation but investigate
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•Place AGC in constant frequency control
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•Place AGC in flat tie line control
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•Suspend AGC and investigate - CORRECT ANSWER✔✔-•Suspend AGC and
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investigate


When a Balancing Authority's ACE value is the same sign as the frequency
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deviation , which NERC control performance score is affected negatively
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•DCS
•CPS 1 |




•TEC
•BAAL - CORRECT ANSWER✔✔-•CPS 1
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, Correct Of the following , which control system would be affected by a difference
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in Net Actual Interchange and Net Scheduled Interchange
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•Reactive Control |




•Turbine Governor Control | |




•Automatic Generation Control | |




•Automatic Voltage Regulator - CORRECT ANSWER✔✔-•Automatic Generation
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Control


Balancing Authority A is currently reading a system frequency of 59.98 Hz . Its Net
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|Actual Interchange is +100 MW and its Net Scheduled Interchange is +100 MW .
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If Balancing Authority A's frequency bias setting is 100 MW / 0.1 HZ , what is ACE
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• -20
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•20
•2
•0 - CORRECT ANSWER✔✔-• -20
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A Balancing Authority has twenty units on governor control . The units have
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different capacities that range from 200 MW to 1000 MW and droop settings
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from 2 % to 5 % . The biggest adjustments in megawatt output in response to a
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frequency disturbance will be provided by units that have _______________?
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•large capacity and small droop setting
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