HSI Final Test Questions WITH ANSWERS,

HSI Final Test Questions WITH ANSWERS
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The initial response to a frequency deviation is due to which of
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the following |\




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 |\ |\




•1 and 2 |\ |\




•2 and 3 |\ |\




•1 and 3 - CORRECT ANSWERS ✔✔•1 and 3
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EMS and AGC have failed at 12:25 and generation must be
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controlled manually. The operator calculates ACE to be +25 MWs.
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Load is expected to increase 100 MWs, and imports will increase
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by 75 MWs at the top of the hour. What should 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 ANSWERS|\ |\ |\ |\ |\ |\ |\ |\


✔✔•Decrease generation by 25 MWs |\ |\ |\ |\

,How is the Frequency Response Measure (FRM) of a Balancing
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Authority determined? |\




•lt is the average of the BA's frequency response for all the
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frequency deviations of the previous year |\ |\ |\ |\ |\




•lt is the change in the BA's Net Interchange Actual for the
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largest frequency deviation during the previous year
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•lt is the previous year's Control Performance Standard 1 ( CPS1 )
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score
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•It is the median of the BA's frequency response for the
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frequency deviation events identified by NERC for the previous
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year - CORRECT ANSWERS ✔✔•It is the median of the BA's
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frequency response for the frequency deviation events identified
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by NERC for the previous year
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Sufficient Operating Reserve is defined as the capacity required
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to meet what?
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•DOE specifications |\




•CPS and DCS |\ |\




•CPS 1 & 2 only |\ |\ |\ |\




•Capacity Standard - CORRECT ANSWERS ✔✔•CPS and DCS |\ |\ |\ |\ |\ |\ |\




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

,•120 MW |\




•80 MW
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•100 MW |\




•200 MW - CORRECT ANSWERS ✔✔•120 MW
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Interconnection frequency is 59.80 Hz . Your ACE is a large |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


negative value and your AGC is pulsing your units down . What
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should you do |\ |\




•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 ANSWERS
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✔✔•Suspend AGC and investigate |\ |\ |\




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




•DCS
•CPS 1 |\




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


•Reactive Control |\




•Turbine Governor Control |\ |\




•Automatic Generation Control |\ |\




•Automatic Voltage Regulator - CORRECT ANSWERS |\ |\ |\ |\ |\ |\


✔✔•Automatic Generation Control |\ |\




Balancing Authority A is currently reading a system frequency of
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59.98 Hz . Its Net Actual Interchange is +100 MW and its Net
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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 ANSWERS ✔✔• -20
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A Balancing Authority has twenty units on governor control . The
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units have different capacities that range from 200 MW to 1000
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MW and droop settings from 2 % to 5 % . The biggest
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adjustments in megawatt output in response to a frequency |\ |\ |\ |\ |\ |\ |\ |\ |\


disturbance will be provided by units that have _______________? |\ |\ |\ |\ |\ |\ |\ |\




•large capacity and small droop setting
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