HSI Final Test Questions and Complete Answers| Verified 100% Correct|

HSI Final Test Questions and Complete Answers|
Verified 100% Correct|

Sufficient Operating Reserve is defined as the capacity required to meet what?


•DOE specifications
•CPS and DCS
•CPS 1 & 2 only

•Capacity Standard - ✔✔•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 - ✔✔•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 - ✔✔•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 - ✔✔•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 - ✔✔•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 - ✔✔• -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 - ✔✔•large capacity and small droop setting


Balancing Authority A is scheduled to import 300 MW but is only importing 260 MW .
Interconnection frequency is 59.94 and Balancing Authority A's Frequency Bias Setting is
-120 MW / 0.1 Hz What is Balancing Authority A's ACE reading?


• -32 MW
• +32 MW
• 0 MW

• -112 MW - ✔✔• -32 MW


Which of the following is used to calculate a Balancing Authority's yearly Frequency
Response Obligation (FRO)


•The Balancing Authority's percentage of the Interconnection's generation and load
•The Balancing Authority's average Frequency Bias Setting for the previous year
•The Balancing Authority's average ACE for the previous year
•The change in the Balancing Authority's Net Interchange Actual for a frequency
deviation of .1 Hz - ✔✔•The Balancing Authority's percentage of the
Interconnection's generation and load

, If the frequency bias setting is less negative than the frequency response of a Balancing
Authority and a frequency decline is caused by a sudden loss of generation in an
external balancing area , what will be the result?


•The ACE will be a negative value and AGC will increase generation
•The ACE will be a positive value and AGC will lower generation
•The ACE will be zero and will take no AGC action

•This will not affect the ACE - ✔✔•The ACE will be a positive value and AGC will lower
generation


Once a Balancing Authority informs the Reliability Coordinator of future or current
Capacity and Energy Emergencies , it is the responsibility of the to mitigate the
emergency condition?


•Reliability Coordinator and Balancing Authority
•Transmission Owner
•Transmission Operator

•Balancing Authority - ✔✔•Reliability Coordinator and Balancing Authority


Re - synchronization with the Interconnection should only be attempted at a
________________?


•Substation with auto re - closing relays
•Location with a synchroscope
•Substation with an auto synchronization relay

•Generating plant with an auto - synchronization relay - ✔✔•Location with a
synchroscope