bài dịch-transient stability improvement using upfc and svc-huỳnh thăng huy

8/17/2019 Bài Dịch-transient Stability Improvement Using Upfc and Svc-huỳnh Thăng Huy

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Bài báo môn Ổn định quá độ trong Hệ thống điện

TRANSIENT STABILITYIMPROVEMENT USING

UPFC AND SVC

CẢI THIỆN ỔN ĐỊNHQUÁ ĐỘ SỬ DỤNG UPFC

V SVC

S.V Ravi Kumar 1 and S. Siva Nagaraju11J.N.T.U. College of Engineering, KAKINADA, A., India

E!mail" ravijn#u$gmail.%om

ABSTRACT T!" #$#

&i#' in%rea(ed )o*er #ran(fer, #ran(ien#(#a+ili# i( in%rea(ingl im)or#an# for (e%ureo)era#ion. Tran(ien# (#a+ili# evalua#ion of large(%ale )o*er ((#em( i( an e-#remel in#ri%a#eand 'ig'l non!linear )ro+lem. An im)or#an#

fun%#ion of #ran(ien# evalua#ion i( #o a))rai(e #'e%a)a+ili# of #'e )o*er ((#em #o *i#'(#and(eriou( %on#ingen% in #ime, (o #'a# (omeemergen%ie( or )reven#ive %on#rol %an +e %arriedou# #o )reven# ((#em +reado*n. In )ra%#i%alo)era#ion( %orre%# a((e((men# of #ran(ien#(#a+ili# for given o)era#ing (#a#e( i( ne%e((arand valua+le for )o*er ((#em o)era#ion.

V/i vi0% #ng %2ng (u3# #ru4n, 5n 67n'8u9 6: #'; %


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#ran(former(. A( a %on(e8uen%e of in%rea(ing )o*er demand, (ome #ran(mi((ion line( aremore loaded #'an *a( )lanned *'en #'e *ere

+uil#. &i#' #'e in%rea(ed loading of long#ran(mi((ion line(, #'e )ro+lem of #ran(ien#

(#a+ili# af#er a major faul# %an +e%ome a#ran(mi((ion limi#ing fa%#or 1. Tran(ien#(#a+ili# of a ((#em refer( #o #'e (#a+ili# *'en(u+je%#ed #o large di(#ur+an%e( (u%' a( faul#(and (*i#%'ing of line( k. T'e re(ul#ing ((#emre()on(e involve( large e-%ur(ion( of genera#or ro#or angle( and i( influen%ed + #'e nonlinear

)o*er angle rela#ion('i). S#a+ili# de)end( u)on +o#' #'e ini#ial o)era#ing %ondi#ion( of #'e((#em and #'e (everi# of #'e di(#ur+an%e. T'evol#age (#a+ili#, and (#ead (#a#e and #ran(ien#

(#a+ili#ie( of a %om)le- )o*er ((#em %an +eeffe%#ivel im)roved + #'e u(e of ACTSdevi%e( X.

+iGn 9). KG# 8u %a vi0% #ng n'u %u %2ng(u3#, m:# v


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5/ MODELING OF PO6ER SYSTEM ANDFACTS DEVICES 7UPFC AND SVC8

5/ M9 H:NH HỆ TH;NG ĐIỆN V THI SVC8

5/. S'?@2*)?)4, "@20?& ")+& 5/. M 2?2 "' ? J

Ha#'ema#i%al model( of a (n%'ronou(

ma%'ine var from elemen#ar %la((i%al model(#o more de#ailed one(. In #'e de#ailed model(,#ran(ien# and (u+ #ran(ien# )'enomena are%on(idered. {ere, #'e #ran(ien# model( are u(ed#o re)re(en# #'e ma%'ine( in #'e ((#em,a%%ording #o follo*ing e8ua#ion(. To re)re(en##ran(ien# effe%#( #*o ro#or %ir%ui#(, one field*inding on #'e d!a-i( and a ')o#'e#i%al %oildam)er *indingp on #'e 8!a-i( are ade8ua#e.

H2 ';n' #o9n '>% %a m9 6hng +: #'a

65i #O m2 ';n' % +n %' Gu 6 %P n'i4u#=n' %'3# 'n. Trong n'zng m2 ';n' %'i #iG#,8u9 6: v< 'i0n #^_ng 8u9 6: #'; 6^_% -em-#. | 6 m2 ';n' 8u9 6: #'; 6^_% (b dcng6 #'a mM# m9 6i0n #rong '0 #'Bng, #'eo 6P%9% '


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&'ere 6P

p p

T'e differen#ial e8ua#ion de(%ri+ing #'eeffe%# of #ran(ien# (alien% i( e-)re((ed a("

'^ng #r;n' vi )'n miu # n' '^ng%a 8u9 6: %% lhi #'; 6^_% +iu di`n"

Yp Yp

&'ere T c i( #ime %on(#an# of #'e dumm%oil and ψ c i( #'e vol#age %orre%#ion #'a#a%%oun#( for #'e effe%# of #ran(ien# (alien%.T'u(

V/i T c l< 'xng (B #'i gian %a %u:n gi67n' v< ψ c l< ( 'i0u %'‚n' 6i0n 9) 6P #=n'#o9n %'o n' '^ng %a 8u9 6: %% lhi. N'^v@

1p 1p

T'e genera#or arma#ure %urren# and #erminal

vol#age in #'e 8!d referen%e frame are rela#ed #o#'eir re()e%#ive )'a(or 8uan#i#ie(.

D]ng )'n Fng m9 )'9# v< 6i0n 9) 6u

%uBi #rn #rc% 8!d 8uan '0 6Gn 6?i l^_ng )'a#^ng Fng.

11p 11p

1kp 1kp

T'e angle δ mea(ure( #'e ro#or )o(i#ion of #'e genera#or rela#ive #o #'e (n%'ronou(lro#a#ing referen%e frame, *'i%' i( im)lied in #'e

)'a(or (olu#ion( of #'e ne#*or. Referring #o

ig.1, *e 'ave"

WP% δ 6o l^ng v7 #r= ro#or %a m9 )'9#8uan '0 6Gn v/i #rc% 8ua 6hng +:, NP +ao'


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T'e vol#age regula#or %onfigura#ion i(('o*n in igure!k. T'e AVR e8ua#ion( are

S 6h 5n 67n' 6i0n 9) #'; 6^_% v… ';n' k.'^ng #r;n' AVR l<

1sp

1tp

1sp

1tp

F04*&K5/ AVR model. F04*&K5/ AVR model.

5/ U?00&+ )(&* )( @)?#*)&* 7UPFC8 5/ BJ 04 20? +? @? ,4# 2?2# 7UPFC8

F04*&K/ Weneral UC (%'eme. F04*&K/ Weneral UC (%'eme.

UC %on(i(#( of #*o (*i#%'ing%onver#er(, *'i%' in #'e im)lemen#a#ion(%on(idered are Vol#age Sour%ed Conver#er(VSCp u(ing Wa#e Turn!ff WTp #'ri(#or

valve(, a( illu(#ra#ed in igure!X. T'e(e%onver#er( are o)era#ed from a %ommon D.C.lin )rovided + a D.C. (#orage %a)a%i#or. T'i(arrangemen# fun%#ion( a( an ideal A.C. #o A.C.

)o*er %onver#er in *'i%' #'e real )o*er %anfreel flo* in ei#'er dire%#ion +e#*een #'e A.C.#erminal( of #'e #*o %onver#er( and ea%'%onver#er %an inde)enden#l genera#e or a+(or+p rea%#ive )o*er a# i#( o*n A.C. ou#)u##erminal. In )rin%i)le a UC %an )erformvol#age (u))or#, )o*er flo* and dnami%

(#a+ili# im)rovemen# in one and #'e (amedevi%e.

UC +ao ghm 'ai +: %'un m?%', %9im< #rong ( #'% 'i0n 6^_% -em -# n'^ +:%'un 65i nguhn 6i0n 9) VSCp (b dcngWa#e Turn!ff WTp van #'ri(#or 6^_%

miu # ';n' X. C9% +: %'un 65i n


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5//. C)?#*)&* )* V,& 5//. BJ 04 20? @2) V,&

T'e in )'a(e %om)onen# of #1 q'e (erie(inje%#ed vol#age, V(e) i( u(ed #o regula#e #'emagni#ude of #'e vol#age Vk. T'e %on#roller

(#ru%#ure i( ('o*n in igure!q. In #'i( Vkref i( #'evalue of #'e de(ired magni#ude of vol#age Vko+#ained from e8ua#ion 1p, Tmea( i( #'e %on(#an##o re)re(en# dela in mea(uremen#(. A (im)lein#egral %on#roller i( u(ed for #'e %on#rol of V(e).}imi#( are on #'e minimum and ma-imumvalue( of V(e). T'e gain of #'e in#egral %on#roller 'a( #o +e adju(#ed (o a( #o )reven# fre8uen#'i##ing of #'e limi#( + #'e %on#roller. I# i( al(oa((umed #'a# V(e) follo*( V(e)ref *i#'ou# an #imedela. During %on#ingen% Vkref %an i#(elf +e

varied. T'e differen#ial e8ua#ion( rela#ing In! )'a(e Vol#age Con#rol are

Trong #'


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)erforman%e re8uiring fa(# %on#rolp. T'u(,*'ile real and rea%#ive )o*er referen%e( are (e#from #'e (#ead (#a#e load flo* re8uiremen#(, #'ereal )o*er referen%e %an al(o +e modula#ed #oim)rove dam)ing and #ran(ien# (#a+ili#. An

au-iliar (ignal Smp i( u(ed #o modula#e #'e )o*er referen%e ref p of #'e UC. A *a('ou#%ir%ui# i( )rovided (o a( #o )reven# an (#ead(#a#e +ia(. T'e differen#ial e8ua#ion( rela#ing8uadra#ure Vol#age Con#rol are

#'i0n ( 8u9 6: u %u 6i4u 'in n'an'p. N'^ v@, #rong 'i %2ng (u3# #9% dcng v< %2ng(u3# )'n '9ng %'un 6Gn #'; 6M# #O #r?ng #'9i5n 67n' d]ng #i u %u, %2ng (u3# #9% dcng%'un 6Gn %P #' %yng 6i4u %'‚n' 6 %i #'i0n

gim %'3n v< 5n 67n' 8u9 6:. H:# #=n 'i0u )'cSmp #'; (b dcng 6 6i4u %'‚n' %2ng (u3# muref p %a UC. H:# m?%' %'Bng -B% #'; %ung%3) 6 ngn ngOa n' '^ng #r?ng #'9i #\n'.'^ng #r;n' vi )'n 8uan '0 vu2ng gP% v/i6i0n 9) 6i4u 'in l<

kp kp

k1p k1p

F04*&KW/ Con#roller (#ru%#ure for V(e8 F04*&KW/ Con#roller (#ru%#ure for V(e8

5// M)+&0? ) UPFC )* #*?,0&?#,#00#' &=4#0)?

5// M 2?2 @X UPFC @2) =03@ ?2 0? Z?2 4 J

In T*o!)or# re)re(en#a#ion of UC, T'e%urren# inje%#ion( due #o UC a# #'e #*o )or#(are I 1 and I 2, *'i%' 'ave #o +e de#ermined a#ever #ime (#e) of #'e (imula#ion )ro%e((.

Trong ( miu # 'ai %ba %a UC, ( +m d]ng l< v; UC 'ai %5ng l< I 1 v< I 2,nP 6^_% -9% 67n' m>i ln m†i +^/% %a #iGn#r;n' m2 )'€ng.

kkpkXp

kkpkXp

I# i( #o +e no#ed #'a# (erie( inje%#ed vol#agei( (um of 8uadra#ure %om)onen# and in )'a(e%om)onen#( V(e8 and V(e). In a (imilar *a, #'e('un# %urren# i( e-)re((ed a( #*o %om)onen#(I('8 and I('). T'e magni#ude of ('un# real %urren#i( de#ermined from real )o*er +alan%ere8uiremen# and i( given +

NP 6 %' ‡ rxng 6i0n 9) +m nBi #iG) l<#5ng %a #'


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T'e magni#ude( of #'e %om)onen#( of #'e(erie( inje%#ed vol#age, V(e) and V(e8T'e ne#*or e8ua#ion a# #'e #*o )or#( of #'e UC, *'en #'ee-#ernal ne#*or i( re)re(en#ed + i#(T'eveninw( e8uivalen# a# #'e #*o )or#(, %an +e

*ri##en a("

: l/n %a #'


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(#a#i% genera#or( and or a+(or+er( *'o(e ou#)u#(are varied (o a( #o %on#rol vol#age of #'e ele%#ri%

)o*er ((#em(. In i#( (im)le form SVC i(%onne%#ed of C!TCR %onfigura#ion a( ('o*n inigure!s. T'e SVC i( %onne%#ed #o a %ou)ling

#ran(former #'a# i( %onne%#ed dire%#l #o #'e a% +u( *'o(e vol#age i( #o +e regula#ed. T'eeffe%#ive rea%#an%e of #'e C!TCR i( varied +firing angle %on#rol of #'e an#i )arallel #'ri(#or(.T'e firing angle %an +e %on#rolled #'roug' a I%on#roller in (u%' a *a #'a# #'e vol#age +u(*'ere #'e SVC i( %onne%#ed i( main#ained a# #'ereferen%e value.

+[ #\n' #'; 6^_% G# nBi (ong (ong m9 )'9##\n' v< '3) #'u %2ng (u3# )'n '9ng ng~ ra#'a 65i 6 6i4u 'in 6i0n 9) %a '0 #'Bng6i0n. Trong SVC #'; 6^_% G# nBi %a %3u';n' C!TCR 6^_% +iu di`n #rong ';n' s.

SVC 6^_% G# nBi 6Gn m:# +iGn 9) g') 6P#'; 6^_% G# nBi #r% #iG) 6Gn +u( a% m< 6i0n9) %n 6i4u %'‚n'. i0n '9ng #9% 6:ng %aC!TCR #'; #'a 65i +i +i 6i4u 'in gP%=%' #'ri(#or (ong (ong, gP% =%' %P #' 6i4u'in #'2ng 8ua m:# +: 6i4u 'in I +xng%9%' 6P 6i0n 9) +u( ni SVC G# nBi 6^_%du #r; gi9 #r7 6M#.

F04*&K]/ T)i%al SVC ((#em. F04*&K]/ T)i%al SVC ((#em.

/ DEVELOPMENT OF TRANSIENTSTABILITY SOLUTION

/ PHÁT TRI^N GIẢI PHÁP ỔN ĐỊNHQUÁ ĐỘ

Tran(ien# (#a+ili# anal(i( i( u(ed #oinve(#iga#e #'e (#a+ili# of )o*er ((#em under (udden and large di(#ur+an%e(, and )la( anim)or#an# role in )lanning and o)era#ion of #'e

)o*er ((#em. T'e #ran(ien# (#a+ili# anal(i( i( )erformed + %om+ining a (olu#ion of #'ealge+rai% e8ua#ion( de(%ri+ing #'e ne#*or *i#'numeri%al (olu#ion of #'e differen#ial e8ua#ion(.Al#'oug' (ignifi%an# im)rovemen#( 'ave +eenmade in #'e a))li%a#ion of numeri%al and%om)u#a#ional me#'od( #o #'e #ran(ien# (#a+ili#%al%ula#ion, #'e %om)u#a#ional demand( areri(ing ra)idl a# #'e (ame #ime. T'erefore #'erei( a %on#inual (ear%' for fa(#er and a%%ura#e(olu#ion( #o #'e #ran(ien# (#a+ili# )ro+lem.

'n #=%' 5n 67n' 8u9 6: #'; 6^_% (b dcng6 ng'in %Fu 5n 67n' %a '0 #'Bng 6i0n d^/i#9% 6:ng n'i`u l/n, 6:# ng:# v< v7 #r= 6M# m:#vai #r] 8uan #r>ng #rong vi0% ln G 'o?%' v<v@n '% miu #'0 #'Bng v/i )') gii (B %a )'^ng #r;n' vi

)'n. HM% d[ ‡ ng'\a ( %i #iGn 6^_% #?o ra#rong Fng dcng (B v< #'u@# #o9n d[ng m9#=n' 6 #=n' #o9n 5n 67n' 8u9 6:, ( 6]i '€im9 #=n' #'; #ng n'an' %'Png %[ng m:##'i 6im. V; v@ %P m:# ( ng'in %Fu #iG)#c% %'o %9%' gii %'=n' -9% v< n'an' 6Gn v3n64 5n 67n' 8u9 6:.

/. P*#0#0)?&+KS)4#0)? *)@2 )*#*?,0&?# ,#00#' &4#0)?,

/. G0_0 2 2`? @20 a? b? @2)2cd? #*?2 ? Z?2 4 J

T'e #ran(ien# (#a+ili# )ro+lem i( defined +a (e# of non!linear differen#ial e8ua#ion(

V3n 64 5n 67n' 8u9 6: 6^_% -9% 67n' +i6M# m:# )'^ng #r;n' vi )'n )'i #uGn

HVTH: Huỳnh Thăng Huy – MHV:!"!#$%$!!!# Tr&ng "


10/21


DAE(p. DAE(p

ksp

ktp

ksp

ktp

E8ua#ion ksp de(%ri+e( ma%'ine dnami%(in%luding #'eir %on#rol %ir%ui#(, and e8ua#ionktp de(%ri+e( #'e ne#*or (#a#i% +e'avior in%luding (#ead (#a#e model( of load( andalge+rai% e8ua#ion( of ma%'ine(. T'e ini#ial%ondi#ion( are de#ermined from a (#ead (#a#e

)o*er flo* (olu#ion. T'e (#ru%#ure of e8ua#ionktp *ill %'ange a# %er#ain in(#an#( of #ime due#o faul# ini#ia#ion, faul# %learing, e#%. Su%'%'ange( re8uire re!(olu#ion( *i#'ou# advan%ing#'e #ime and )rodu%e di(%on#inuou( in #'e valueof ve%#or -. No di(%on#inui# %an a))ear in .T'e differen#ial e8ua#ion (e# 1p i( (olved +in#egra#ion (e)ara#el for , and #'e alge+rai%(e# ktp i( (olved (e)ara#el for -. Con(ider #'e(#e) in numeri%al in#egra#ion of ksp from agiven )oin# #n!1p, - #n!1pp a# #ime #n!1. T'ein#egra#ion over #'e in#erval #n!1 #o #n #o ge##n p, re8uire( #'e %orre()onding value of a(u+(e# u of (e# of varia+le( -.

'^ng #r;n' ksp miu # 6:ng l% m9 +ao ghm m?%' 6i4u 'in v< )'^ng #r;n'ktp miu # #r?ng #'9i #\n' %a '0 #'Bng +aoghm m2 ';n' 5n 67n' #\n' %a #i v< )'^ng#r;n' #o9n '>% %a m9. i4u i0n +an 6u #';6^_% -9% 67n' #O m:# )') #=n' d]ng %2ng(u3# #r?ng #'9i #\n'. C3u #r% %a )'^ng #r;n'ktp (… #'a 65i #'i gian ngn %'=n' -9%

+an 6u ( %B, v^_# 8ua ( %B v.v.. S #'a65i u %u gii l?i +€ 8ua #'i gian #ng v<o d


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Xp Xp

rom #'e (n%'ronou( genera#or model, #'ereal and imaginar )ar# of arma#ure %urren# i(

e-)re((ed a("

TO m:# m2 ';n' m9 )'9# 6hng +:, )'n#'% v< )'n o %a d]ng =%' #O 6^_% +iu

di`n"

„

„

pp pX1pq d q d

q d

a d

E j E V jV i ji

R jX

ψ ψ + − − +

+ =+

„

„

pp pX1pq d q d

q d

a d

E j E V jV i ji

R jX

ψ ψ + − − +

+ =+

Su+(#i#u#ing for i8 and id u(ing e8ua#ion X1p,#'e e8ua#ion( kp, kYp and Xp %an +e grou)edand e-)re((ed in #'e form

T'a #'G i8 v< id (b dcng )'^ng #r;n' X1p, )'^ng #r;n' kp, kYp v< Xp %P #' n'Pml?i v< +iu di`n d?ng

Xkp Xkp

T'e #ra)eoidal rule of in#egra#ion i( a))lied#o (olve #'e Zlo% 1" •u #% ';n' #'ang G# '_) 6^_% 9) dcng6 gii 'Bi 1"

XXp XXp

Xqp Xqp

Ha#ri%e( C1 , Ck and CX are defineda( follo*(

Ha #r@n C1 , Ck and CX 6^_% -9%67n' #'eo

Xp Xp

Xsp Xsp

I# i( im)or#an# #o no#e #'a# for (olu#ion of #'e#np, #'e %orre()onding value of u#np i(re8uired.

•uan #r>ng 6 %' ‡ %'o %9%' gii #np,gi9 #r7 #^ng Fng %a u#np #'; u %u.

kp T'e De( %orre()onding #o #'e AVR form( Zlo% II of #'e ((#em DE(.

kp #^ng Fng 6 d?ng AVR 'Bi II %a '0#'Bng DE(

T'e Differen#ial e8ua#ion re)re(en#ing #'eAVR i("

'^ng #r;n' vi )'n miu # AVR l<

Xtp Xtp

Af#er a))ling #'e #ra)eoidal rule of in#egra#ion, e8ua#ion Xtp %an +e e-)re((ed a(

Sau 'i 9) dcng 8u #% ';n' #'ang G#'_), )'^ng #r;n' Xtp %P #' +iu di`n

Xp Xp

&'ere | 6P

HVTH: Huỳnh Thăng Huy – MHV:!"!#$%$!!!# Tr&ng ''


12/21


n%e EA#np i( o+#ained, ED#np i( ea(ilo+#ained from %ondi#ion( given in #'e e8ua#ion1tp. I# follo*( from #'e e8ua#ion Xp #'a#%al%ula#ion of Efd#np re8uire( #'e %orre()ondingvalue of V##np.

H:# 'i EA#np 6?# 6^_%, ED#np d` d


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follo*ing (#e)("

1. Read( #'e line da#a. I# in%lude( #'e da#afor line(, #ran(former( and ('un# %a)a%i#or(.

1. >% dz li0u 6^ng d. NP +ao ghm dzli0u 6^ng d, m9 +iGn 9) v< #c m% (ong(ong

k. orm admi##an%e ma#ri-, ŠZUS k. D?ng ma #r@n #5ng dn, ŠZUS

X. Read( genera#or da#a R a, ƒd, ƒ8, ƒdw, ƒ8w,{, D e#%p.

X. >% dz li0u m9 )'9# R a, ƒd, ƒ8, ƒdw,ƒ8w, {, D e#%p.

q. Read( (#ead (#a#e +u( da#a from #'e loadflo* re(ul#(. V, , load, •load, gen,•gen p.

q. >% dz li0u +u( #r?ng #'9i 5n 67n' #O G#8u d]ng #i V, , load, •load, gen,•gen p.

. Cal%ula#e( #'e num+er of (#e)( for differen# %ondi#ion( (u%' a( faul# e-i(#ing #ime,line ou#age #ime +efore au#o!re%lo(ing,(imula#ion #ime e#%

. T=n' #o9n (B l^_ng %9% +^/% %'o 6i4ui0n '9% +i0# n'^ #'i gian #hn #?i ( %B, #'igian m3# 6i0n 6^ng d #r̂ /% 'i # 6Pngl?i, #'i gian m2 )'€ng v.v..

s. Hodif ŠZUS + adding #'e genera#or and load admi##an%e(.

s. T'a 65i ŠZUS +i #'m m9 )'9# v<#5ng dn #i

or genera#or +u( Žiw C'o m9 )'9# +u( Žiw

ii ii #iY Y Y = + 1

#i

#i di

Y Y jX

=+

ii ii #iY Y Y = + 1

#i

#i di

Y Y jX

=+

or load +u( Žiw C'o #i +u( Žiw

t. Cal%ula#e faul# im)edan%e and modif #'e +u( im)edan%e ma#ri- *'en #'ere i( an lineou#age follo*ing #'e faul#.

t. T=n' #o9n #r '9ng ( %B v< #'a 65ima #r@n #r '9ng +u( 'i 6P +3# %F m3#6^ng d #'eo ( %B

. Cal%ula#e #'e ini#ial %ondi#ion( and%on(#an#( needed in (olving #'e DAE( of

genera#or(, AVR e#%.

. T=n' #o9n 6i4u i0n +an 6u v< 'xng (B%n #rong gii DAE( %a m9 )'9#, AVR

v.v

Y. Solve( #'e ne#*or e8ua#ion i#era#ivel inea%' #ime (#e).

Y. Wii )'^ng #r;n' m?ng l@) l?i m†i +^/% n' #'i gian.

1. or ƒd!ƒ8 model( %al%ula#e( Vd!V8 u(ing#'e o+#ained vol#age( and ro#or angle(.

1. C'o ƒd!ƒ8 m2 ';n' #=n' #o9n Vd!V8 (bdcng 6i0n 9) 6?# 6^_% v< gP% %a ro#or.

11. Cal%ula#e( #'e genera#or ele%#ri% )o*er ou#)u#(

11. T=n' #o9n %2ng (u3# 6i0n ng~ ra.

1k. T'e #ime (#e) i( advan%ed + #'e %urren#

#ime (#e).

1k. Z^/% n' #'i gian 6^_% )'9# #rin

+i +^/% #'i gian d]ng.1X. Solve( #'e genera#or (*ing e8ua#ion( 1X. Wii )'^ng #r;n' dao 6:ng m9 )'9#

HVTH: Huỳnh Thăng Huy – MHV:!"!#$%$!!!# Tr&ng '(


14/21


u(ing #ra)eoidal rule of in#egra#ion ee)inggenera#or me%'ani%al )o*er ou#)u# a( %on(#an#.

(b dcng 8u #% ';n' #'ang G# '_) giz %2ng(u3# ng~ ra m9 )'9# '2ng 65i.

1q. Solve( #'e AVR e8ua#ion( 1q. Wii )'^ng #r;n' AVR

1. Solve( #'e UC and SVC. T'e +u(

%urren# inje%#ion ve%#or i( modified *i#' UCand SVC inje%#ion %urren#(. T'en ne#*or e8ua#ion i( again (olved u(ing ŠZUSV‰Iinj.

1. Wii UC v< SVC. Ve%#or ( +m

d]ng #'; #'a 65i v/i d]ng +m UC v<SVC. Sau 6P )'^ng #r;n' m?ng 6^_% gii#r l?i (b dcng ŠZUS V‰Iinj.

1s. C'e%( for num+er of (#e)(. 1s. Kim #ra %'o (B %a %9% +^/%.

1t. S#e)( from t #o 1k are re)ea#ed u) #o #'e#o#al num+er of (#e)(.

1t. C9% +^/% #O t 6Gn 1k 6^_% l@) l?i 6Gn#5ng (B %a +^/%

1. lo#( #'e (*ing %urve( for all #'egenera#or(.

1. V… 6^ng %ong dao d:ng %'o #3# % %9%m9 )'9#.

W/ CASE STUDY W/ TRijNG HkP NGHIlN CmU

Ca(e (#udie( are %ondu%#ed, #o evalua#e #'e )erforman%e of #'e %on#roller, on 1!Wenera#or,XY!Zu(, Ne* England Te(# S(#em"

Ng'in %Fu %9% #r^ng '_) 6 dn #/i vi0%69n' gi9 ( #'% 'i0n %a +: 6i4u 'in, #rn1 m9 )'9#, XY +u(, '0 #'Bng im #ra Ne*England

or #'i( ((#em, genera#or ‘Y i( (evereldi(#ur+ed, (o (*ing %urve( of genera#or ‘Y areonl o+(erved. Zo#' Cla((i%al and De#ailed

model( are %on(idered for #'i( (#ud. A #'ree! )'a(e faul# a# an +u( *i#' a %learing #ime of sm( i( %on(idered #o o+(erve +o#' #ran(ien#(#a+ili# and dam)ing of )o*er o(%illa#ion(.

C'o '0 #'Bng (au, m9 )'9# Y +7 n'i`ung'im #r>ng, +i v@ 6^ng %ong dao 6:ng%a m9 )'9# Y 6^_% 8uan (9#. C 'ai m2

';n' %'i #iG# v< %5 6in 6^_% -em -# %'ong'in %Fu n


15/21


F04*&Kn/ 1!Wenera#or, XY!Zu(, Ne* England Te(# S(#em

T'e follo*ing %a(e( are %on(idered" N'zng #r^ng '_) #'eo (au #'; 6^_% -em -#"

ip aul# a# +u( ‘ks, no line %leared, UCin line kY!ks.

ip Ngn m?%' +u( ks, '2ng %# 6^ngd, UC d kY ! ks

iip aul# a# +u( ‘ks, line %leared ks!k,UC in line kY!ks

iip Ngn m?%' +u( ks, %# 6^ng dks!k, UC 6^ng d kY!ks

iiip aul# a# +u( ‘ks, no line %leared, UCin line 1!1q

iiip Ngn m?%' +u( ks, '2ng %# 6^ngd, UC 6^ng d 1!1q

ivp aul# a# +u( ‘ks, no line %leared, UCin line kY!ks and SVC a# k +u(.

ivp Ngn m?%' +u( ks, '2ng %# 6^ngd, UC 6^ng d kY!ks v< SVC +u(k

vp aul# a# +u( ‘ks, line %leared ks!k,UC in line kY!ks and SVC a# k +u(.

vp Ngn m?%' +u( ks, %# 6^ng dks!k, UC 6^ng d kY!ks v< SVC

+u( k

vip aul# a# +u( ‘ks, no line %leared, UCin line 1!1q and SVC a# k +u(.

vip Ngn m?%' +u( ks, '2ng %# 6^ngd, UC 6^ng d 1!1q v< SVC +u(k

Wenera#or" H9 )'9#"

ƒd ‰ 1.s, ƒdw‰.Xk, Tdow‰s., ƒ8 ‰1., ƒd ‰ 1.s, ƒdw‰.Xk, Tdow‰s., ƒ8 ‰1.,

ƒ8w‰.Xk, T8ow ‰ .qq, {‰., f Z‰ s { ƒ8w‰.Xk, T8ow ‰ .qq, {‰., f Z‰ s {

Ne#*or" ƒ#r ‰.1, ƒ}1 ‰ ƒ}k ‰ .k, ƒ + ‰.1 ^ng d" ƒ#r ‰.1, ƒ}1 ‰ ƒ}k ‰ .k, ƒ + ‰.1AVR" K A ‰ k, TA‰ ., Efdmin ‰ !s., AVR" K A ‰ k, TA‰ ., Efdmin ‰ !s.,

HVTH: Huỳnh Thăng Huy – MHV:!"!#$%$!!!# Tr&ng '$


16/21


Efdma- ‰ s. Efdma- ‰ s.

Ini#ial )era#ing oin#" Vg‰ 1., g ‰ .t,E +‰1.

im 'o?# 6:ng +an 6u" Vg‰ 1., g ‰.t, E +‰1.

UC" T'e limi#( on +o#' V(e) and V(e8‰.X )u.

UC" Wi/i '?n V(e) and V(e8 ‰.X )u.

F04*&Ko/ 11 S*ing %urve( of genera#or( ‘1 #o ‘ 1. F04*&Ko/ 11 S*ing %urve( of genera#or( ‘1 #o ‘ 1.

T'e (*ing %urve( for all #'e #en genera#or(re)re(en#ed + %la((i%al model( are ('o*n inig.11. A #'ree!)'a(e (mme#ri%al faul# a# +u(ks *i#' a %learing #ime of s m(, for no lineou#age, i( %on(idered for #'e (#ud. I# i( o+(ervedfrom #'e igure! #'a# onl genera#or ‘Y i((everel di(#ur+ed, and (o (*ing %urve( of genera#or ‘Y are onl %on(idered for #'einve(#iga#ion of #'e effe%# of UC on #'e

((#em.

^ng %ong dao 6:ng %'o #3# % 1 m9 )'9# #^ng Fng v/i m2 ';n' %5 6in 6^_%#r;n' +


17/21


igure!11. S*ing %urve( ’aul# a# +u(‘ks, no line%leared, UC in line 1q!1.

igure!11. ^ng %ong dao 6:ng ( %B +u( ks'2ng %# 6^ng d, UC 6^ng d 1q!1

F04*&K.5/ S*ing %urve( ’aul# a# +u( ‘ks, line%leared ks!k, UC in line ks!kY

F04*&K.5/ S*ing %urve( ’aul# a# +u( ‘ks, line

%leared ks!k, UC in line ks!kY

igure!1X. S*ing %urve(! Cla((i%al model" aul# a#

+u( ‘ ks, no line %leared, SVC a# +u( ‘ k.igure!1X. S*ing %urve(! Cla((i%al model" aul# a#

+u( ‘ ks, no line %leared, SVC a# +u( ‘ k.

HVTH: Huỳnh Thăng Huy – MHV:!"!#$%$!!!# Tr&ng '+


18/21


igure!1q. S*ing %urve(! Cla((i%al model" aul# a#Zu( ‘ ks, no line %leared, UC in line ‘ks!kY and

SVC a# +u( ‘ k.

igure!1q. S*ing %urve(! Cla((i%al model"aul# a# Zu( ‘ ks, no line %leared, UC in line

‘ks!kY and SVC a# +u( ‘ k.

igure!1. S*ing %urve(!Cla((i%al model" aul# a# +u( ‘ ks, no line %leared, UC in line ‘ ks!kY.

igure!1. S*ing %urve(!Cla((i%al model" aul# a# +u( ‘ ks, no line %leared, UC in line ‘ ks!kY.

or #'i( %a(e (#ud, onl %on#rol of V(e8 i(

%on(idered. V(e) i( a((umed #o +e ero a# allin(#an#(. {en%e, #'e UC +e'ave( a( a SSSC.T'e ig.1X ('o*( #'e (*ing %urve( of genera#or ‘Y for %a(e ip *i#' and *i#'ou# UC. In #'i(%a(e a #'ree!)'a(e faul# a# +u( ks, *'i%' i(%leared af#er #'ree %%le( *i#'ou# an lineou#age i( %on(idered. T'e UC i( %onne%#ed in#'e line ks!kY, a# #'e end of #'e line %lo(e #o +u(ks. igure!1 ('o*( #'e (*ing %urve of genera#or Y, *'i%' (e)ara#e( from #'e re(# of #'egenera#or( *'en #'e ((#em i( un(#a+le, for afaul# a# +u( ks. Com)aring #'e %urve( *i#' and*i#'ou# #'e UC, i# %an +e o+(erved #'a# #'e

)o*er %on#roller 'el)( in dam)ing #'e )o*er o(%illa#ion( and al(o im)rove( #'e #ran(ien#(#a+ili# + redu%ing #'e fir(# (*ing. T'i( i(

+e%au(e in mul#i!ma%'ine ((#em( #'ere areman mode( of o(%illa#ion( and #'e %on#rol(ignal ma no# +e effe%#ive in dam)ing all #'emode(. igure!Y ('o*( #'e )lo# of #'e (erie(inje%#ed vol#age of #'e UC. UC i( inje%#ing

leading vol#age #o dam) o(%illa#ion(. Severalo#'er %a(e( are #e(#ed. I# i( o+(erved #'a# #'eeffe%# of UC i( more )ronoun%ed *'en i# i(

C'o #r^ng '_) ng'in %Fu n


19/21


)la%ed near 'eavil di(#ur+ed genera#or ra#'er #'an )la%ed a# remo#e lo%a#ion. T'i( %an +eo+(erved + %om)aring igure!1 and igure!1k, *'ere in igure!1k #'e (*ing %urve( ('o*nfor %a(e iiip, in *'i%' UC i( )la%ed +e#*een

line( 1!1q. I# i( al(o o+(erved #'a# #'e effe%# of UC i( more )ronoun%ed *'en #'e %on#roller i( )la%ed near #'e faul#ed +u( ra#'er #'an )la%eda# remo#e lo%a#ion(.

NP n'@n -# rxng 'i4u 8u %a UC #'; r~r


20/21


UC i( modeled a( de)enden# %urren#inje%#ion model. Cal%ula#ion of inje%#ed %urren#('a( +een %arried in (u%' a *a #'a# i# (im)lifie(#'e in%lu(ion of UC in generalied #ran(ien#(#a+ili# )rogram. T'e #ran(ien# (#a+ili# and

dam)ing of )o*er o(%illa#ion( are evalua#ed*i#' UC and SVC. Dnami%( of #'e ((#em i(%om)ared *i#' and *i#'ou# )re(en%e of UCand SVC in #'e ((#em. I# i( %lear from #'ere(ul#( #'a# #'ere i( %on(idera+le im)rovemen# in#'e ((#em )erforman%e *i#' #'e )re(en%e of SVC and UC.

UC l< iu mu n'^ m2 ';n' +m d]ng )'c #'u:%. T=n' #o9n d]ng +m mang l?i %9%'#'F% 6P nP 6n gin ghm ( #'am gia %aUC #rong %'^ng #r;n' 5n 67n' 8u9 6:#5ng 8u9#. n 67n' 8u9 6: v< gim dao 6:ng

%2ng (u3# #'; %P gi9 gi9 #r7 v/i UC v< SVC.:ng l% %a '0 #'Bng #'; 6^_% (o (9n' v/i( %P mM# 'oM% '2ng %P mM# %a UC v<SVC #rong '0 #'Bng. NP #'; r~ r


21/21


ss N.Hi#'ulanan#'an, Claudio A.Caniare(, Jo'n Reeve and Wra'am J.Roger(, ”Com)ari(on of SS, SVC and STATCH Con#roller( for Dam)ing o*er ((#em (%illa#ion(, IEEE#ran(a%#ion( on o*er ((#em, %#o+er kk.

tt }.Wugi, T.R.Rie#man, A.Edri(, C.D. S%'auder, and S.}.&illiam(, ”T'e Unified o*er lo* Con#roller" A Ne* A))roa%' #o o*er Tran(mi((ion Con#rol, IEEE Tran(a%#ion( ono*er Deliver, Vol.1, No. k, A)ril 1YY.

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