Active Power Filters Numericals Part 2
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Numerical Problems on Active Power Filters part 2 1. A three-phase shunt act ive power filter (APF) i s employed for harmonics c urrent compensation for a three-phase 415V, 5 !" fed 1#- pulse diode $rid%e converter drawin% 5 A constant dc current& 't consists of an ideal transformer with sin%le primary star connected windin% and two secondary windin%s connected in star and delta with same line volta%es and unity turns ratios to provide phase shift $etween two sets of three-phase output volta %es& *wo +-pulse diode $rid%es are connected in series t o provide 1#-pulse ac-dc converter& alculate the active power drawn $y the load, the current, volta%e and VA ratin% of the APF to provide harmonics current compensation at unity power factor& et the supply is stiff enou%h so that the distortion in volta%e at the point of common couplin% is ne%li%i$le& 2. A three-phase shunt active power filter (.APF) is employed for ha rmonics currents and react ive power compensation f or a three- phase 415 V, 5 !" fed 1#-pulse thyristor $rid%e converter drawin% 4 A constant dc current at / firin% an%le of its thyristors& 't consists of an ideal transformer with sin%le primary star connected windin% and two secondary windin%s connected in star and delta with same line volta%es and unity turns ratios to provide phase shift $etween two sets of three-phase output volta%es& *wo +-pulse thyristors $rid%es are connected in series to provide 1#-pulse ac-dc converter& alculate (a) fundamental active power drawn $y the load, ($) fundamental reactive power drawn $y the load, (c) VA ratin% of APF to provide (i) only harmonics current compensation, (ii) only reactive power compensation and (iii) full harmonics current and reacti ve power compensation at unity power factor& et the supply is stiff enou%h so that the distortion in volta%e at the point o f common couplin% is ne%li%i$le& 3. A three-phase shunt acti ve power filter (.APF) is employed for harmonics currents and rea ctive power compensa tion for a three-phase 44 V, 5 !" fed 1#-pulse thyristor $rid%e converter drawin% 5 A constant dc current at +/ firin% an%le of its thyristors& 't consists of an ideal transformer with sin%le primary star connecte d windin% and two secondary windin%s connected in star and delta with same line volta%es and unity turns ratios to provide phase shift $etween two sets of three-phase output volta%es& *wo +-pulse thyristors $rid%es are connected in series to provide 1#-pulse ac-dc converter& alculate (a) fundamental active power drawn $y the load, ($) fundamental reactive power drawn $y the load, (c) VA ratin% of APF to provide (i) only harmonics current compensation, (ii) only reactive power compensation and (iii) full harmonics current and react ive power compensation at unity power factor& et t he supply is stiff enou%h so 000000000000000000000000000000000 00
Transcript of Active Power Filters Numericals Part 2
Numerical Problems on Active Power Filters part 2
1. A three-phase shunt active power filter (APF) is employed for harmonics current compensation for a three-phase 415V, 5 !" fed 1#-
pulse diode $rid%e converter drawin% 5 A constant dc current& 't consists of an ideal transformer with sin%le primary star connectedwindin% and two secondary windin%s connected in star and delta with same line volta%es and unity turns ratios to provide phase shift
$etween two sets of three-phase output volta%es& *wo +-pulse diode $rid%es are connected in series to provide 1#-pulse ac-dc converter&alculate the active power drawn $y the load, the current, volta%e and VA ratin% of the APF to provide harmonics current compensation
at unity power factor& et the supply is stiff enou%h so that the distortion in volta%e at the point of common couplin% is ne%li%i$le&
2. A three-phase shunt active power filter (.APF) is employed for harmonics currents and reactive power compensation for a three-
phase 415 V, 5 !" fed 1#-pulse thyristor $rid%e converter drawin% 4 A constant dc current at / firin% an%le of its thyristors& 'tconsists of an ideal transformer with sin%le primary star connected windin% and two secondary windin%s connected in star and delta withsame line volta%es and unity turns ratios to provide phase shift $etween two sets of three-phase output volta%es& *wo +-pulse
thyristors $rid%es are connected in series to provide 1#-pulse ac-dc converter& alculate (a) fundamental active power drawn $y the load,($) fundamental reactive power drawn $y the load, (c) VA ratin% of APF to provide (i) only harmonics current compensation, (ii) onlyreactive power compensation and (iii) full harmonics current and reactive power compensation at unity power factor& et the supply isstiff enou%h so that the distortion in volta%e at the point of common couplin% is ne%li%i$le&
3. A three-phase shunt active power filter (.APF) is employed for harmonics currents and reactive power compensation for a three-phase
44 V, 5 !" fed 1#-pulse thyristor $rid%e converter drawin% 5 A constant dc current at +/ firin% an%le of its thyristors& 't consists ofan ideal transformer with sin%le primary star connected windin% and two secondary windin%s connected in star and delta with same linevolta%es and unity turns ratios to provide phase shift $etween two sets of three-phase output volta%es& *wo +-pulse thyristors $rid%esare connected in series to provide 1#-pulse ac-dc converter& alculate (a) fundamental active power drawn $y the load, ($) fundamental
reactive power drawn $y the load, (c) VA ratin% of APF to provide (i) only harmonics current compensation, (ii) only reactive powercompensation and (iii) full harmonics current and reactive power compensation at unity power factor& et the supply is stiff enou%h so 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
