Improvement of Power Quality Using Multioulse Converters

8/13/2019 Improvement of Power Quality Using Multioulse Converters

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REPORT ON:-

Improvement

Of

Power Quality

Using

Multipulse

Converters


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ATMIYAINSTITUTE OF TECHNOLOGY & SCIENCE -

RAJKOT

CERTIFICATE

This is to certify that Mr.Vipul K. Mecwan Reg. No.1030507081

ranch: !lectrical engineering se"ester 7th has satisfactorily

co"plete# the ter" wor$ in the su%&ect of 'e"inar within the

four walls of the (nstitute.

)ate of su%"ission* +

,,,,,,,,,


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,,,,,,,,,

,,,,,,,,,

Staff in chargHa! "f #$t%

ACKNOWLEDGEMENT

Then ( woul# li$e to e-press "y heartily than$s toATMIYA

INSTITUTE OF TECHNOLOGY & SCIENCE for proi#ing "e

such an e-cellent gui#ance for the se"inar. They were the Main

force %ehin# all this wor$ %ecause of its alua%le 'uggestions an#

proper gui#ance for the se"inar. They taught us how to /or$ in

an rganiation2 how to co"plete gien /or$ within )ea#lines2

/or$ing un#er ressure an# %eing (n#epen#ent.

( ta$e the opportunity to e-press "y #eep an# sincere sense

of gratitu#e towar#s "y gui#e r"f% Nitin at' who was the

real source of "y inspiration an# encourage"ent. 4is constant

help2 thoughtful suggestions an# #eep interest hae ena%le# "e

to co"plete this wor$.

( a" also than$ful to all those who hae helpe# "e in this

en#eaor either #irectly or in#irectly2 inclu#ing "y frien#s for

their coor#ination an# gui#ance


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r$ar!

()

*i$+' K%

Mc,an

In! :-

/hat is power uality6

eneral power uality pro%le"s.

ro%le"s create# in general 9+)9 conerters.

/hat are Multipulse 9+)9 conerters6

9lassification of Multipulse 9+)9 conerters.

Mo#eling an# #esign of 'tar:)elta connecte#

autotransfor"er %ase# 1;+pulse2 18+pulse an# ;


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3=+pulse 9+)9 conerter for line current har"onic

re#uction.

Types of Multipulse full wae 9+)9 conerters.

'election criterion of Multipulse 9+)9 conerters.

#antages of Multipulse 9+)9 conerters.

pplications.

References.

What is Power Quality

ower uality is si"ply the interaction of electrical power

with electrical euip"ent.

(f electrical euip"ent operates correctly an# relia%ly

without %eing #a"age# or stresse#2 we woul# say that the

electrical power is of goo# uality.

n the other han#2 if the electrical euip"ent

"alfunctions2 is unrelia%le2 or is #a"age# #uring nor"al

usage2 we woul# suspect that the power uality is poor.

(t can %e #efine# as*

ny power pro%le" create# in

Voltage2

9urrent2


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or freuency #eiations

That results in failure or "isoperation of electrical

euip"ent.


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Gnra' ",r .+a'it) r"/'01 ar a1

/'",!"

Rolling %rownouts

Voltage 'ags

'pi$es

!lectrical noise

4ar"onic #istortion

Gnra' c'a111 "f $",r 2+a'it)

$r"/'01 $r IEC3

C"n!+ct! '",-fr2+nc) $hn"0na

'ignal syste"s >power line carrier?

Voltage fluctuations >flic$er?

Voltage #ips an# interruptions

Voltage ("%alance >un%alance?

ower freuency ariations

(n#uce# low+freuency oltages

)9 in ac networ$s

4ar"onics2 interhar"onics.

Ra!iat! '",-fr2+nc) $hn"0na

Magnetic an# !lectric @iel#s.


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r"/'01 crat! in gnra' AC-#C

C"n4rtr1 ar a1 /'", *+

The "a&or pro%le"s in 9+)9 conerters are in&ection of

har"onics at input an# output.

4ar"onics cause #ielectric2 ther"al or oltage stress2 which

cause pre"ature ageing of electrical insulation.

Voltage #istortion at point of co""on coupling ta$es place

#ue to the oltage #rop of har"onic currents flowing

through syste" i"pe#ances.

9apacitor %an$ oerloa#ing #ue to syste" resonance.

(nterference on telephone an# co""unication lines #ue to

noise in#uce# fro" the power con#uctors.

oor power factor.

!uip"ent #a"age fro" oltage spi$es create# %y high

freuency resonance resulting fro" notching.

/e can sole all the a%oe power uality

pro%le"s using Multipulse 9+)9 9onerters.


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5hat ar M+'ti$+'1 AC-#C C"n4rtr13

Multipulse conerters are conerters proi#ing "ore than

si- pulses of )9 oltage per cycle fro" 9 input.

r the conerter haing "ore steps in 9 input current than

that of si- pulse %ri#ge rectifier supply current.

ri#ge rectifier is the %asic %loc$ reuire# for 9+)9

conersion2 howeer2 full+wae an# half+wae rectifiers arealso use# up to 1;0$/ ratings.

hase shifting transfor"ers are use# to #erie "ultiple

phase supply fro" three+phase 9 "ains using #ifferent

co"%inations of transfor"er win#ings such as star2 #elta2

igag2 for$2 polygon2 etc.

CLASSIFICATION OF MULTIULSE AC-#C

CON*ERTERS

9+)9 9onerters with re#uce#

har"onics

Ancontrolle#

>Ani+#irectional?

"ultipulse

9ontrolle#

>i+#irectional?

"ultipulse

Non+(slolate#

"ultipulse

conerters

Non+(slolate#

"ultipulse

conerters

(solate#

"ultipulse

conerters

(solate#

"ultipulse

conerters


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@ull

wae

ri#ge

conert

@ull

wae

@ull

wae

@ull

wae

ri#ge

conert

ri#ge

conert

ri#ge

conert


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CLASSIFICATION OF MULTIULSE AC-#C

CON*ERTERS

(a1! "n $ha1 1hift

hase 'hift B =00: Nu"%er of 'i-+ulse 9onerters

+'1 (a1! C"nfig+rati"n1

Twele+ulse 9onerters 00an# 300hase 'hift

Twele+ulse 9onerters ase# on C150

an# +150

hase 'hift

!ighteen +ulse 9onerters ase# on C;00an# +;00

hase 'hift

Twenty+@our+ulse 9onerters ase# on 150hase

'hift

Thirty+ulse 9onerters ase# on 1;0hase 'hift

N"n-I1"'at! M+'ti$+'1 AC-#C

C"n4rtr1

A+t"tran1f"r0r C"nncti"n (a1! C"nfig+rati"n1

'tar 9onnecte# utotransfor"er

)elta 9onnecte# utotransfor"er

olygon 9onnecte# utotransfor"er

)elta+olygon 9onnecte# utotransfor"er


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4e-agon 9onnecte# utotransfor"er

T+ 9onnecte# utotransfor"er

Digag utotransfor"er


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STAR C"nnct! A+t"tran1f"r0r (a1!

67 +'1 C"n4rtr


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M"!'ing An! #1ign Of M+'ti$+'1 AC-#C

C"n4rtr1

T,'4-+'1 C"n4rtr1 (a1! "n 869 an! -69

ha1 Shift

Star C"nnct! A+t"tran1f"r0r

VaB K1EVa+ K;E V%

VaB K1EVa+ K;EVc

VaBV002 V%BV+1;002 VcB V 1;00

Va B V C1502 V%B V+1050

VcB V 1350

VaB 0.81= Va + 0.;F8 V%

VaB 0.81= Va + 0.;F8 Vc


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T,'4-+'1 C"n4rtr1 (a1! "n 8 an! ; ha1

Shift

#'ta C"nnct! A+t"tran1f"r0r

#1ign "f A+t"tran1f"r0r

VaBVa C K1Vca C K;V%c

VaBV002 V%BV+1;002 VcB V1;00

Va B V C3002 V%

B V+F002 VcB V 1500

K1B0.08


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Star C"nnct! A+t"-Tran1f"r0r (a1! 6


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#'ta C"nnct! A+t"-Tran1f"r0r (a1! 6


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VaBVa C 0.0


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Va;B V ;;.502 V%;B V+F7.502 Vc;B V1;;.50

Va3B V +7.502 V%3B V+1;7.502 Vc3B V11;.50

Va


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Mat'a/ 0"!' "f 7=-$+'1 AC-#C c"n4rtr ,ith

*CIM# '"a!


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C"0$ari1i"n Of ",r .+a'it) ara0tr1

Of #iffrnt AC-#C C"n4rtr1

Topol

ogy

Goa

#

9

"ains

current

(ac>?

HT4)

of (ac

at

)istorti

on

factor

)isplac

e"ent

power

factor

ower

factor

)9

Volta

ge >V?

Gig

+ht

loa+#

@ul

l

loa+#

Gig

+ht

lo+a#

@ul

l

loa+#

Gig

+ht

lo+a#

@ul

l

loa+#

Gi+

gh

tlo+

a#

@ull

loa

#

Gi+

g

htlo

+

a

#

@u

+ll

lo+a#

Gi

+

ght

lo

+

a

#

@

ull

lo+

a

#

=+

pulse

10.

58

8.

70

1

1F.

1;

7-$+'1 AC-#C c"n4rtr i1 ra'i!

/) thr 7%7 @*AB1ing'-$ha1 tran1f"r0r an!

th !1ign !tai'1 ar a1 f"''",1:

@lu- )ensity* 0.8Tesla2 9urrent )ensity*;.3:"";2

Turns per olt* 0.88

!+Ga"inations* GengthB;3.5c"2 /i#thB1=c"

(+Ga"inations* GengthB;3.5c"2 /i#thB 7.= c" J 8.=c"?

Tran1f"r0r ,in!ing !tai'1:

/in#ing Voltage No. f Turns uage f /ire

>'/?

Vac 3=5 17K1EVr 31 15

K;EVr =8 17

K3EVr ;0 17

K


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Multipulse @ull /ae 9+)9 9onerters

(solate# @ull+/ae

Multipulse 9+)9

'tar+

connection

Digag+

9onnection

T+

connection

=+pulse

1;+pulse

18+pulse

;


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'tar 9onnecte# Multipulse

@ull /ae =+ulse 9+)9 9onerter


@ull /ae 1;+ulse 9+)9 9onerter


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@ull /ae 18+ulse 9+)9 9onerter


@ull /ae ;


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'election 9riterion of Multipulse 9+)9

9onerters *+

Nu"%er of phases in 9 "ains

Reuire# leel of power uality in input >per"itte# @2

9@2 T4)?

Type of output )9 oltage >constant2 aria%le2 etc.?

ower+flow >uni#irectional an# %i+#irectional?

Nu"%er of ua#rants >one2 two or four?

Nature of )9 output >isolate#2 non+isolate#?

Reuire"ent of )9 output >9ontrolle# an#

Ancontrolle#?

Reuire# leel of power uality in )9 output >oltage

ripple2 oltage regulation?

Type of )9 loa#s >linear2 nonlinear2 etc.?

9ost

'ie

/eight

!fficiency

Noise leel >!M(2 R@(2 etc.?

Rating >/2 $/2 M/2 etc.?

Relia%ility


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Nu"%er of )9 outputs

!niron"ent >a"%ient te"perature2 altitu#e2 pollution

leel2 hu"i#ity2 types of cooling2 etc.?

A!4antag1 "f M+'ti-$+'1 AC-#C

C"n4rtr1 :-

The perfor"ance para"eters such as total+har"onic+

#istortion >T4)? of 9 "ains current an# ripple factor

of output )9 oltage i"proe2 si"ultaneously.

The i"proe"ent is in#epen#ent of supply freuency

ariation2 unli$e passie filters.

Mini"al or no control reuire# as )io#es an#:or

thyristors are "ainly use#.

!cono"ic2 "aintenance free an# efficient.

hase shifting transfor"ers are use# to #erie "ultiplephase supply fro" three+phase 9 "ains using

#ifferent co"%inations of transfor"er win#ings such as

star2 #elta2 igag2 for$2 polygon2 etc.

Gesser rating transfor"er reuire# in autotransfor"er

%ase# topologies.

Gess losses.

4igh !fficiency.


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A$$'icati"n1 :-

N"n-I1"'at! C"ntr"''! Rctifir1:

)9 "otor #rie syste" with regeneratie

capacity.

'o"e power supplies of large rating also use non+

isolate# #ual conerters.

I1"'at! C"ntr"''! Rctifir1 :

4V)9 syste"s.

attery energy storage syste"s.


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#&usta%le spee# synchronous "otor #rie of

large power ratings for applications such as

"ining.

rc furnaces.

N"n-I1"'at! Unc"ntr"''! Rctifir1*

@ront en# of 'witche# "o#e powers li$e+'M'2

A'2 9+)9 "otor #ries2 #c sero #ries.

ircraft V'9@ >Voltage source controlle#

freuency? syste"s an# aircraft "aintenance

syste"s using =04:


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References *+

www.google.co"

www.ieee.org
http://www.google.com/http://www.google.com/

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Improvement of Power Quality Using Multioulse Converters