NERCgTOPgSystemgOperationsgEXAMgQuestionsgandgAnswersg(Downlo
adgTogScoregAngA)
Atgwhatgtorqueganglegofgoperationgdoesgpowergtypicallygbegingtogflowgfromgtheggeneratorgtogthegsyste
m?
A) 90gdegrees
B) 60gdegrees
C) 30gdegrees
D) 10gdegrees
10gdegrees
Choosegtheganswergthatgbestgdescribesgthegoperationgofgagrotor.
A) Thegstationarygpartgofgthegtransmissiongsystem.
B) Agtypegofgsuperconductor.
C) Thegstationarygelementgofgaggeneratorgthatghasgitsgwindingsgconnectedgtogthegsystem.
D) Thegexcitedg(energized)gfieldgwindinggthatgrotatesginsidegthegstatorgtoginducegcurrentgintogthegsta
torgwindings.
Thegexcitedg(energized)gfieldgwindinggthatgrotatesginsidegthegstatorgtoginducegcurrentgintogthegstator
gwindings.
Ingagsystemgthatgisgmoregcapacitivegthanginductive,gthegcurrentgsinegwavegwillg
thegvoltagegsinegwavegwithgtendsgtog voltage.
A) lag;graise
B) lead;graise
C) lead;glower
D) lag;glower
,lead;graise
Sustainedgoperationgwithgagpowerganglegorgtorqueganglegaboveg cangleadgtogsystemginstability.
A) 10gdegrees
B) 90gdegrees
C) 120gdegrees
D) 360gdegrees
90gdegrees
Whichgofgthegfollowinggconditionsgmaygcausegtransientginstabilitygingthegpowergsystem?
A) Whengthegpowerganglegincreasesgtog90gdegreesgorgmore.
B) Whengagdisturbancegcausesgmomentarygpowerganglegexcursionsggreatergthang90gdegrees.
C) Whengheavygpowergtransfersgoccurgingthegsystem,gsuchgasgwhengtheregisgaglossginggeneration.
D) Allgofgthegabove
Allgofgthegabove
WhichgofgthegfollowinggisgagmethodgthatgReliabilitygCoordinatorsgandgBalancinggAuthoritiesgmaygusegtog
managegtransmissiongoutages?
A) Coordinategandgadheregtogvoltagegschedulesgtogminimizegreactivegpowergflow.
B) OptimizegthegusegofgLoadgTapgChangergtransformers,gcapacitors,gandgreactors.
C) Verifygvoltagegcontrolgequipmentgaregongautomaticgtogsupplygthegrequiredgvoltagegsupport.
D) Allgofgthegabove
Allgofgthegabove
, WhengaglargeggeneratorgongangInterconnectiongtripsgoffgline,gtheg ofgthegInterconnection
.
A) frequency;gdrops
B) transformergtemperature;gdrops
C) AVRs;gdrops
D) voltage;gincreases
frequency;gdrops
A(n)g
isgthegvaluegthatgsatisfiesgthegmostglimitinggofgthegprescribedgoperatinggcriteriagfo
rgagspecifiedgsystemgconfigurationgtogensuregoperationgwithingacceptablegreliabilitygcriteria.
A) SystemgOperatinggLimit
B) CircuitgOverload
C) SystemgOverloadgLimit
D) InterconnectiongReliabilitygOperatinggLimits
SystemgOperatinggLimit
Generatorgratingsgspecifygtheg andg atgwhichgtheygcangoperategsafely.
A) temperature;gvoltage
B) torquegangle;gvoltage
C) SystemgOperatinggLimits;gInterconnectiongOperatinggLimits
D) voltage;gfrequency
voltage;gfrequency
adgTogScoregAngA)
Atgwhatgtorqueganglegofgoperationgdoesgpowergtypicallygbegingtogflowgfromgtheggeneratorgtogthegsyste
m?
A) 90gdegrees
B) 60gdegrees
C) 30gdegrees
D) 10gdegrees
10gdegrees
Choosegtheganswergthatgbestgdescribesgthegoperationgofgagrotor.
A) Thegstationarygpartgofgthegtransmissiongsystem.
B) Agtypegofgsuperconductor.
C) Thegstationarygelementgofgaggeneratorgthatghasgitsgwindingsgconnectedgtogthegsystem.
D) Thegexcitedg(energized)gfieldgwindinggthatgrotatesginsidegthegstatorgtoginducegcurrentgintogthegsta
torgwindings.
Thegexcitedg(energized)gfieldgwindinggthatgrotatesginsidegthegstatorgtoginducegcurrentgintogthegstator
gwindings.
Ingagsystemgthatgisgmoregcapacitivegthanginductive,gthegcurrentgsinegwavegwillg
thegvoltagegsinegwavegwithgtendsgtog voltage.
A) lag;graise
B) lead;graise
C) lead;glower
D) lag;glower
,lead;graise
Sustainedgoperationgwithgagpowerganglegorgtorqueganglegaboveg cangleadgtogsystemginstability.
A) 10gdegrees
B) 90gdegrees
C) 120gdegrees
D) 360gdegrees
90gdegrees
Whichgofgthegfollowinggconditionsgmaygcausegtransientginstabilitygingthegpowergsystem?
A) Whengthegpowerganglegincreasesgtog90gdegreesgorgmore.
B) Whengagdisturbancegcausesgmomentarygpowerganglegexcursionsggreatergthang90gdegrees.
C) Whengheavygpowergtransfersgoccurgingthegsystem,gsuchgasgwhengtheregisgaglossginggeneration.
D) Allgofgthegabove
Allgofgthegabove
WhichgofgthegfollowinggisgagmethodgthatgReliabilitygCoordinatorsgandgBalancinggAuthoritiesgmaygusegtog
managegtransmissiongoutages?
A) Coordinategandgadheregtogvoltagegschedulesgtogminimizegreactivegpowergflow.
B) OptimizegthegusegofgLoadgTapgChangergtransformers,gcapacitors,gandgreactors.
C) Verifygvoltagegcontrolgequipmentgaregongautomaticgtogsupplygthegrequiredgvoltagegsupport.
D) Allgofgthegabove
Allgofgthegabove
, WhengaglargeggeneratorgongangInterconnectiongtripsgoffgline,gtheg ofgthegInterconnection
.
A) frequency;gdrops
B) transformergtemperature;gdrops
C) AVRs;gdrops
D) voltage;gincreases
frequency;gdrops
A(n)g
isgthegvaluegthatgsatisfiesgthegmostglimitinggofgthegprescribedgoperatinggcriteriagfo
rgagspecifiedgsystemgconfigurationgtogensuregoperationgwithingacceptablegreliabilitygcriteria.
A) SystemgOperatinggLimit
B) CircuitgOverload
C) SystemgOverloadgLimit
D) InterconnectiongReliabilitygOperatinggLimits
SystemgOperatinggLimit
Generatorgratingsgspecifygtheg andg atgwhichgtheygcangoperategsafely.
A) temperature;gvoltage
B) torquegangle;gvoltage
C) SystemgOperatinggLimits;gInterconnectiongOperatinggLimits
D) voltage;gfrequency
voltage;gfrequency
