Thiet Ke Do an Luoi Dien 6293

7/28/2019 Thiet Ke Do an Luoi Dien 6293

1/67

Trng i hc bch khoa H Ni

Thit k n

Li in

D n mn hc li in


2/67


3/67


LI NI U

Nc ta ang trong qu trnh cng nghip ho hin i ho,ngnh in phi c u

tin pht trin p ng nhu cu pht trin kink t. Trong qu trnh pht trin kinht ph tin pht trin ngy cng nhanh i hi phi quy hoch v xy dng mi mng in.

n mn hc li in gip sinh vin p dng nhng kin thc hc thit k

mt mng in khu vc, t gip sinh vin hiu su sc hn nhng kin thc l

thuyt hc. ng thi y l bc u tp dt c kinh nghim trong n tt

nghip sau ny.

Trong qu trnh lm n em rt bit n cc thy trong b mn h thng in, em xin

chn thnh cm n T.S Nguyn Vn m hng dn em hon thnh n ny.

Sinh vin: Trn Tt t

D n mn hc li in


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CHNG I

CN BNG CNG SUT TC DNGV PHN KHNG TRONG MNG IN

I.Cn bng cng sut tc dng.

Gi thit ngun in cung cp cng sut tc dng cho mng in.

+++== .tdtdmdptycF PPPPmPP

Trong ::FP tng cng sut pht.

ycP tng cng sut yu cu.m: h s ng thi. ptP : tng cng sut cc ph ti

MWPPPPPPPpt 166202832203036654321 =+++++=+++++=

=== MWPP ptomd 3,8166.100

55 .0

:tdP tng cng sut t dng trong nh my in, i vi mng in = .0tdP

:dtP tng cng sut d tr ca h thng, =0dtPdo MWPP ycF 3,1743,8166 =+==

II.Cn bng cng sut phn khng

Cng sut phn khng do ngun pht ra l: FFF tgPQ = vi .85,0cos =F62,0= Ftg 97,11162,0.6,180 == FQ MVAR

Tng cng sut phn khng m h thng tiu th l:

++++= .dttdcLbaptyc QQQQQQQ

Coi cng sut t dng v cng sut d tr bng khng: == .0dttd QQTng cng sut phn khng trn ng dy bng tng cng sut phn khng do in dung cng dy pht ra:

= .cL QQ

=== 25,83484,0.1726

1

iipt tgPQ MVAr ???????????

=== MVArQQ ptba 49,1225,83.15.15 0000Tng cng sut phn khng trong cc MBA.

=+=+= MVArQQQ baptyc 74,9549,1225,83

Ta c 74,9597,111 =>= ycF QQ nn ta khng phi b s b.Bng s liu tnh ton s b

S liu Ph ti 1 Ph ti 2 Ph ti 3 Ph ti 4 Ph ti 5 Ph ti 6

Pmax 30 32 26 28 30 26Qmax 14,52 15,49 12,58 13,55 14,52 12,58

cos 0,9 0,9 0,9 0,9 0,9 0,9

D n mn hc li in


5/67


D n mn hc li in


6/67


CHNG IICHN PHNG N HP L V KINH T, K THUT

I .Phng n I1. s ni dy.

Thng s ca s ni dy.( cch tnh Pmax ????????????)

on O-2 2-1 0-4 4-3 0-6 6-5Pmax(MW) 62 30 54 26 56 30Qmax(MVar) 30,01 14,52 26,14 12,58 27,10 14,52

L(km) 63,25 41,23 76,16 42,43 63,25 41,23

2.Tnh in p danh nh cho h thng.

in p danh nh ca h thng c xc nh theo cng cng thc kinh nghimiii PLU .16.43,4 +=

Li:chiu di on th i,kmPi:cng sut tc dng chy trn on ng dy th i,MWT cng thc trn ta c

kVU14,10130.1623,41.43,4

1=+=

kVU 14462.1625,63.43,42 =+=

kVU 85,9426.1623,42.43,43 =+=

kVU 83,13554.1616,76.43,44 =+=

kVU 14,10130.1623,41.43,45 =+=

kVU 2,13756.1625,63.43,46 =+=

Vy ta chn in p danh nh ca li in l 110kV3. Xc nh tit din dy dn ca cc on ng dy.

D n mn hc li in

O2

3

4

1

5

6


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-D kin dng dy AC,ct thp,Dtb=5m.-Ta dng phng php mt kinh t ca dng in chn tin din dy dn.Tra ph lc trong gio trnhMng li in vi dy AC v Tmax=5000h ta c Jkt=1,1A/mDng in chy trn cc on ng dy c tnh theo cng thc.

3

22

10.

.3. ddUn

QPI

+=

Xt chi tit tng on.

*on 0-2

AI 8,18010.110.3.2

01,3062 322

20=

+=

I0-2sc=2.I0-2=361,6A

Vy ta chn Ftc0-2=150mm2 vi Icp=445A>Isc=361,6A

*on 2-1

AI 47,8710.110.3.2

52,1432 322

12 =+

=

I2-1sc=2.I2-1=174,97A212

1225,79

1,1

47,87mm

J

IF

kt

===

Vy ta chnFtc2-1=70mm2 vi Icp=265A>Isc=174,97A

*on 0-4

AI 45,15710.110.3.2

14,2654 322

40=

+=

I0-4sc=2.I0-4=314,90A240

4014,143

1,1

45,157mm

J

IF

kt

===


*on 4-3

AI 80,7510.110.3.2

58,1226 322

34 =+

=

I4-3sc=2.I4-3=151.60A234

34 91,681,1

80,75

mmJ

I

Fkt ===


D n mn hc li in


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*on 0-6

AI 27,16310.110.3.2

10,2756 322

60=

+=

I0-6sc=2.I0-6=326,54A260

60 43,1481,1

27,163mm

J

IF

kt

===

Vy ta chnFtc0-6=150mm2 vi Icp=445A>Isc=326,54A*on 0-2

*on 6-5

AI 47,8710.110.3.2

52,1430 322

56 =+

=

I6-5sc=2.I6-5=174,94A256

5652,79

1,1

47,87mm

J

IF

kt

===

Vy ta chnFtc6-5=70mm2 vi Icp=265A>Isc=174,94AT tit din tm c ca cc on ng dy,tra ph lc trong gio trnh

Mng li in ta c bng sau.

on 0-2 2-1 0-4 4-3 0-6 6-5Pmax,MW 62 30 54 26 56 30Qmax,MVAr 31,01 14,52 26,14 12,58 27,10 14,52

L,km 63,25 41,23 76,16 42,43 63,25 41,23Ftt,mm2 164,36 79,52 146,38 72,82 151,68 79,52Ftc,mm2 150 70 150 70 150 70r0,/km 0,21 0,46 0,21 0,46 0,21 0,46

x0,/km 0,416 0,44 0,416 0,44 0,416 0,44b0,10-6S/km 2,74 2,58 2,74 2,58 2,74 2,58R, 6,64 9,48 8,00 9,76 6,64 9,48

X, 13,16 9,07 15,84 9,33 13,16 9,07B,10-6S 173,31 106,37 208,68 109,47 173,31 106,37

4.Tnh tn tht in p trn cc on ng dy ch bnh thng v khi s c.Tn tht in p trn cc on ng dy c tnh theo cng thc( )

100...

200

dm

iiii

iU

XQRPU

+=

Trong:PI,QI:Cng sut tc dng vphn khng chy trn on th i.RI,XI:In tr v In khng ca on th i.

D n mn hc li in


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II .Phng n II.

1.s ni dy.

Thng s ca s ni dy.

on O-2 2-1 0-3 0-4 0-6 6-5Pmax(MW) 62 30 26 28 56 30Qmax(MVar) 30,01 14,52 12,58 13,55 27,10 14,52L(km) 63,25 41,23 100 76,16 63,25 41,23

2.La chn tit din dy dn.

Tnh Ftt tng t nh phng n 1,tra ph lc gio trnh Mng li in ta lp cbng sau.

on 0-2 2-1 0-3 0-4 0-6 6-5Pmax,MW 62 30 26 28 56 30Qmax,MVAr 31,01 14,52 12,58 13,55 27,10 14,52L,km 63,25 41,23 100 76,16 63,25 41,23Ftt,mm2 164,36 79,52 68,92 74,22 151,68 79,52Ftc,mm2 150 70 70 70 150 70r0,/km 0,21 0,46 0,46 0,46 0,21 0,46

x0,/km 0,416 0,44 0,44 0,44 0,416 0,44b0,10-6S/km 2,74 2,58 2,58 2,58 2,74 2,58

R, 6,64 9,48 23 17,52 6,64 9,48X, 13,16 9,07 22 16,76 13,16 9,07B,10-6S 173,31 106,37 258 196,49 173,31 106,37

3.Tnh tn tht in p trn cc on ng dy ch bnh thng v khi sc.

*on 0-2-1

Tnh tng t nh phng n 1 ta c.

D n mn hc li in 1

O2

3

4

1

56


11/67

Trng i hc bch khoa H Ni%11,10

%021=

bt

%77,16%021= sc

*on 0-3.

%23,7110

22.58,1223.262%03

=+

=bt

%46,14110

22.58,12.223.26.22%03

=+=sc

*on 0-4.

%93,5110

76,16.55,1352,17.282%04

=+=bt

%86,11110

76,16.55,13.252,17.28.22%04

=+

= sc

*on 0-6-5.

%46,9%065=

bt

%48,15%065=

sc

4.Tng kt phng n 2.

%15%11,10%max


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III .Phng n III.1.s ni dy.

Thng s ca s ni dy.

on O-1 0-2 2-3 0-4 0-6 6-5Pmax(MW) 30 58 26 28 56 30Qmax(MVar) 14,52 28,07 12,58 13,55 27,10 14,52L(km) 92,20 63,25 44,72 76,16 63,25 41,23



on 0-1 0-2 2-3 0-4 0-6 6-5Pmax,MW 30 58 26 28 56 30Qmax,MVAr 14,52 28,07 12,58 13,55 27,10 14,52L,km 92,20 63,25 44,72 76,16 63,25 41,23Ftt,mm2 79,53 153,75 68,92 74,22 151,68 79,52Ftc,mm2 70 150 70 70 150 70r0,/km 0,46 0,21 0,46 0,46 0,21 0,46

x0,/km 0,44 0,416 0,44 0,44 0,416 0,44b0,10-6S/km 2,58 2,74 2,58 2,58 2,74 2,58R, 21,21 6,64 10,29 17,52 6,64 9,48

X,20,28 13,16 9,84 16,76 13,16 9,07

B,10-6S 232,72 173,31 115,38 196,49 173,31 106,37

3.Tnh tn tht in p trn cc on ng dy ch bnh thng v khi sc.

Tnh tng t phng n 1 ta c

*on 0-1 .

D n mn hc li in 1

O2

3

4

1

56


13/67


%69,7110

28,20.52,1421,21.302%01

=+= bt

%38,15110

28,20.52,14.221,21.30.22%01

=+

= sc

*on 0-2-3.

%47,9110

84,9.58,1229,10.2616,13.07,2864,6.58

2%023 =

+++

= bt

%71,15110

84,9.58,1229,10.2616,13.07,28.264,6.58.22%023

=+++

= sc

*on 0-4.%93,5%04 == bt

%86,11%04==

sc

*on 0-6-5.%46,9%065 = bt

%48,15%065= sc

4.Tng kt phng n 3.

%15%47,9%max


14/67


IV .Phng n IV.

1.s ni dy.

Thng s ca s ni dy.

on O-1 0-2 2-3 0-4 0-5 0-6Pmax(MW) 30 58 26 28 30 26Qmax(MVar) 14,52 28,07 12,58 13,55 14,52 12,58L(km) 92,20 63,25 44,72 76,16 92,20 63,25



on 0-1 0-2 2-3 0-4 0-5 0-6

Pmax,MW 30 58 26 28 30 26Qmax,MVAr 14,52 28,07 12,58 13,55 14,52 12,58L,km 92,20 63,25 44,72 76,16 92,20 63,25Ftt,mm2 79,53 153,75 68,92 74,22 79,53 75,82Ftc,mm2 70 150 70 70 70 70r0,/km 0,46 0,21 0,46 0,46 0,46 0,46

x0,/km 0,44 0,416 0,44 0,44 0,44 0,44b0,10-6S/km 2,58 2,74 2,58 2,58 2,58 2,58R, 21,21 6,64 10,29 17,52 21,21 14,55

X, 20,28 13,16 9,84 16,76 20,28 13,92

B,10-6S 232,72 173,31 115,38 196,49 232,72 163,193.Tnh tn tht in p trn cc on ng dy ch bnh thng v khi s c.

Tnh tng t phng n 1 ta c*on 0-1

%69,7%01 == bt

%38,15%01== sc

*on 0-2-3.

D n mn hc li in 1

O2

4

1

56


15/67

Trng i hc bch khoa H Ni%47,9

%023==

bt

%71,15%023== sc

*on 0-4.%93,5%04 == bt

%86,11%04==

sc

*on 0-6-5.%46,9%065 = bt

%48,15%065=

sc

4.Tng kt phng n 4.

%15%47,9%max


16/67


Sau y l bng gi xy dng 1km ng dy trn khng in p 110kV ,1 mch, ct thp

Loi dy AC-70 AC-95 AC-120 AC-150 AC-185 ACO-240K0,106/km 208 283 354 403 441 500

Tnh chi tit tng phng n

1.Phng n 1

*on 0-2:

dy AC-150K02=403.1,6.63,25.106=40,78.109

MWP 60,264,6.110

01,30622

22

02=

+=

*on 2-1:dy AC-70K21=208.1,6.41,23.106=13,72.109

MWP 87,048,9.110

52,14302

22

21=+=

*on 0-4

dy AC-150K04=403.1,6.76,16.106=49,12.109

MWP 38,200,8.110

14,26542

22

04=

+=

*on 4-3

dy AC-70K21=208.1,6.42,43.106=14,12.109

MWP 67,076,9.110

58,12262

22

43=

+=

*on 0-6:dy AC-150K06=403.1,6.63,25.106=40,78.109

MWP 12,264,6.110

10,27562

22

06=

+=

*on 6-5:dy AC-70

K65=208.1,6.41,23.106

=13,72.109

MWP 87,048,9.

110

52,14302

22

65=

+=

T kt qu trn ta lp c bng sauon 0-2 2-1 0-4 4-3 0-6 6-5K,109 40,78 13,72 49,12 14,12 40,78 13,72P ,MW 2,60 0,87 2,38 0,67 2,12 0,87

D n mn hc li in 1


17/67


Ta c:Kd= iK =K02 +K21 +K04 +K43 +K06 +K65=(40,78+13,72+49,12+14,12+40,18+13,72).109=171,64.109 =+++++= MWPi 51,987,012,267,038,287,06,2

=== hMWPA i .61,324383411.51,9.

Z=0,165.171,64.109+1,7055.9,51.109=44,54.109

2.Phng n 2.Tnh tng t phng n 1 ta c bng sau

on 0-2 2-1 0-3 0-4 0-6 6-5K,109 40,78 13,72 33,28 25,35 40,78 13,72P ,MW 2,60 0,87 1,59 1,40 2,12 0,87

Ta c:Kd= iK =K02 +K21 +K03 +K04 +K06 +K65=(40,78+13,72+33,28+25,35+40,18+13,72).109=167,63.109

=+++++= MWPi 45,987,012,24,159,187,06,2

=== hMWPA i .95,322333411.45,9.

Z=0,165.167,63.109+1,7055.9,45.109=43,78.109

3.Phng n 3.

Tnh tng t phng n 1 ta c bng sau

on 0-1 0-2 2-3 0-4 0-6 6-5K,109 30,68 40,78 14,88 25,35 40,78 13,72P ,MW 1,95 2,28 0,71 1,40 2,12 0,87

Ta c:Kd= iK =K01 +K02 +K23 +K04 +K06 +K65=(30,68+40,78+14,88+25,35+40,18+13,72).109=166,19.109 =+++++= MWPi 33,987,012,24,171,028,295,1

=== hMWPA i .63,318243411.33,9.

Z=0,165.166,19.109+1,7055.9,33.109=43,33.109

4.Phng n 4.

Tnh tng t phng n 1 ta c bng sau

on 0-1 0-2 2-3 0-4 0-5 0-6K,109 30,68 40,78 14,88 25,35 30,68 21,05P ,MW 1,95 2,28 0,71 1,40 1,95 1,00

Ta c:Kd= iK =K01 +K02 +K23 +K04 +K05 +K06=(30,68+40,78+14,88+25,35+30,68+21,05).109=163,42.109

=+++++= MWPi 29,900,195,14,171,028,295,1

D n mn hc li in 1


18/67


=== hMWPA i .19,316883411.29,9.

Z=0,165.163,42.109+1,7055.9,29.109=42,81.109

5.Tng kt cc phng n.

cc ch tiu phng n

I II III IV%maxbtU 10,11 10,11 9,47 9,47

%max scU 17,05 16,77 15,71 15,71Z,109 44,54 43,78 43,33 42,81

Ta thy phng n 4 l phng n c Zmin ng thi c cc ch tiu k thut ttnht.Vy phng n 4 l phng n ti u,ta chn phng n 4 l phng nchnh thc tnh ton trong n mn hc nyThng s ca phng n 4

on 0-1 0-2 2-3 0-4 0-5 0-6Pmax,MW 30 58 26 28 30 26Qmax,MVAr 14,52 28,07 12,58 13,55 14,52 12,58L,km 92,20 63,25 44,72 76,16 92,20 63,25r0,/km 0,46 0,21 0,46 0,46 0,46 0,46

x0,/km 0,44 0,416 0,44 0,44 0,44 0,44b0,10-6S/km 2,58 2,74 2,58 2,58 2,58 2,58R, 21,21 6,64 10,29 17,52 21,21 14,55

X, 20,28 13,16 9,84 16,76 20,28 13,92B,10-6S 232,72 173,31 115,38 196,49 232,72 163,19

D n mn hc li in 1


19/67


CHNG IIICHN S LNG ,CNG SUT CC MBA V CC S TRM ,S MNG IN

I.Chn s lng MBA.

V cc ph ti u l cc h tiu th loi 1 nn mi trm u c 2MBAlm vic song song.

II.Chn cng sut cc MBA.

Da vo cng sut cc ph ti v yu cu iu chnh in p ca ph tita s dng cc MBA 2 cun dy iu chnh in p di tiCc MBA c Ucdm=115kV,di iu chnh Uc=9.1,78.UcmCng sut nh mc ca cc MBA ph thuc vo cng sut cc i ca cc phti v phi tho mn iu kin nu nh 1 trong 2my dng lm vic th MBAcn li phi m bo cung cp cng sut cho cc h loi 1 v loi 2 .ngthi khi chn cng sut MBA cn bit n kh nng qu ca MBA cn li khi

1MBA b s c gi l qu ti s c .H s qu ti K=1,4 trong 5 ngy m vmi ngy m khng qu 6 gi.Khi bnh thng cc MBA lm vic vi cng sut S=(6070)%Sm

Nu trm c n MBA th cng sut ca 1my phi tho mn iu kin

( )1max

nK

SS

Trong :Smax:cng sut cc i ca ph tiK:h s qu ti,K=1,4n:s MBA,n=2

Tnh chi tit cho tng trm*Trm 1.

MVAS 81,234,1

52,143022

1 =+

Vy ta chn S1m=25MVA

*Trm 2.

MVAS 40,254,1

49,153222

2=

+

Vy ta chn S2m=32MVA

*Trm 3.

MVAS 63,204,1

58,122622

3=

+

Vy ta chn S3m=25MVA

D n mn hc li in 1


20/67


*Trm 4.

MVAS 22,224,1

55,132822

4=

+

Vy ta chn S4m=25MVA*Trm 5.

MVAS 81,234,1

52,143022

5=

+

Vy ta chn S5m=25MVA*Trm 6.

MVAS 63,204,1

58,122622

6 =+

Vy ta chn S6m=25MVAVy ta chn 2 loi MBA l:TPDH-25000/110 v TPDH-32000/110.Tra ph lcgio trnh mng li in ta c bng cc thng s k thut ca cc MBA nh sau.

Loi MBA slng

s liu k thut s liu tnh tonUc,kV

Uh,kV

Un% nP ,kW

0P ,

kWI0% R, X, 0Q ,

kVArTPDH-25000/110 10 115 11 10,5 120 29 0,8 2,54 55,9 200TPDH-32000/110 2 115 11 10,5 145 35 0,75 1,87 43,5 240

III.S ni dy ton h thng.

Trong h thng c 3 loi trm.

1.Trm ngun.Dng s 2 h thng thanh gp c my ct lin lc.

2.Trm trung gian.

Trong s ny c 1 trm trung gian, dng s mt h thng thanh gp c phn oncung cp in cho h 2 v trm 3.

3.Trm cui.

Gm cc trm 1,3,4,5,6 Cung cp in cho cc h 1,3,4,5,6.

D n mn hc li in 2


21/67


CHNG IVCHN CNG SUT TI U CA CC THIT B B TRONG CC TRM.

gim cng sut phn khng ,gim tn tht in p v tn tht cng sut tatin hnh b cng sut phn khng. Thit b b l cc b t t pha thanhgp h p ca cc trm.Hm mc tiu Z=Z1+Z2+Z3

Z1=K0.Qbtrong :K0-sut u t 1 n v cng sut b,

K0=150.103/kVAr=150.106/MVArZ2= P0.Qb.C0

Trong :0

P :sut tn hao cng sut tc dng trn 1 n v cng sut b, 0P =0,005MW/MVArC0:sut u t cho 1n v cng sut t trong nh my in, C0=15.109/MW

( )02

2

3

.. CRU

QQZ

dm

b

=

Vy Z =(K0+P0.C0).Qb+( )

02

2

.. CRU

QQ

dm

b

Z =225.106.Qb+ ( ) RQQ b ..10.24,126

Tnh chi tit tng on1.on 0-1.

2AC-70 1 2x25MVA 1,S1max

092,2km Qb1

s thay th 0 1 1, Q1R01 Rb1

Qb1

R01=21,21 ; Rb1=1,27Z =225.106.Qb1+ ( ) ( )101

2

1

6..10.24,1 bb RRQQ +

=225.106.Qb1+( ) ..10.88,27 2

11

6

bQQ

D n mn hc li in 2


22/67


( ) 0.10.76,5510.225 11661

==

b

b

QQQ

Z

MVArQQb 48,1004,452,1476,55

22511 ===

( )99,0

04,430

30cos

222

11

2

1

1 =+

=

+

=

bQQP

P >0,97

Ta ch b n cos=0,97 MVArtgPQQtg b 52,725,0.30.25,0 111 ====

MVArQQb 752,752,1452,711 ===2.on 0-2-3.

2AC-150 2AC-70 3 2x25MVA 3,0 S3

63,25km 44,72km

2

2x32MVA Qb3

2,

Qb2 S2

S thay th0 R02 R23

2 3Rb2 Rb3

2, 3,

Qb2 Q2 Qb3 Q3

R02=6,64; R23=10,29; Rb2=0,935; Rb3=1,27;

D n mn hc li in 2


23/67


( ) ( ) ( ) ( ) ( )02

2

32322

2

22233

2

33

6

32

6...10.24,1.10.225 RQQQQRQQRRQQQQZ

bbbbbbbb++++++=

( ) ( ) ( ) ( 32

62

2

52

3

6

32

607,28.10.23,849,1510.16,158,12.10.33,14.10.225 bbbbbb QQQQQQZ ++++=

( ) ( ) 007,28.46,1649,15.32,2225322

2

==

bbb

b

QQQ

Q

Z

( )10969,272.46,16.78,1832

=+ bb QQ

( ) ( ) 007,28.46,1658,12.66,28225 3233

==

bbb

b

QQQQ

Z

( )20575,597.12,45.46,1632

=+bb QQ

T (1) v (2) suy ra Qb2=4,3MVAr; Qb3=11,67MVAr

( ) ( )

+=

+=

bQQP

P Ta ch b n

cos3=0,97 MVArQQQQtg bb 08,65,65,626.25,025,0 33333 =====

Thay Qb3vo (1) 97,098,0cos21,9 22 >== MVArQb Ta b n cos2=0,97MVArQb 49,72 =

4.on 0-4.

2AC-70 4 2x25MVA 4,

S4max076,16km Qb4


Qb4

R04=17,52 ; Rb4=1,27

Z =225.106.Qb4+ ( ) ( )4042

44

6..10.24,1 bb RRQQ +

=225.106.Qb4+

D n mn hc li in 2


24/67


( ) ..10.30,23 244

6

bQQ

( ) 0.10.60,4610.225 4466

4

==

b

b

QQQ

Z

MVArQQb 72,860,46

22544

==

( ) ( ) 98,072,855,1328

28

cos 22244

2

4

4

4 =+

=+

=bQQP

P >0,97


MVArQQb 752,752,1452,711 ===4.on 0-5.


092,2km Qb5


Qb5

R05=21,21 ; Rb5=1,27

Z =225.106.Qb5+ ( ) ( )5052

55

6..10.24,1 bb RRQQ +

=225.106.Qb5+( ) ..10.88,27 2

55

6

bQQ

( ) 0.10.76,5510.225 5566

5

==

b

b

QQ

Q

Z

MVArQQb 48,1004,452,1476,55

22555

===

( )99,0

04,430

30cos

222

55

2

5

5

5=

+=

+

=

bQQP

P >0,97


MVArQQb 752,752,1452,755 ===

D n mn hc li in 2


25/67


5.on 0-6.


0

63,25km Qb6


Qb6

R06=14,55 ; Rb6=1,27Z =225.106.Qb6+ ( ) ( )606

2

66

6..10.24,1 bb RRQQ +

=225.106.Qb6+( ) ..10.62,19 2

66

6

bQQ

( ) 0.10.24,3910.225 6666

6

==

b

b

QQQ

Z

MVArQQb 85,624,39

22566

==

( ) ( )

98,0

85,658,1226

26cos

222

66

2

6

6

6 =

+

=

+

=

bQQP

P >0,97


MVArQQb 08,65,658,125,666 ===6.Bng tng kt sau khi tnh Qb

ph ti 1 2 3 4 5 6Pmax 30 32 26 28 30 26Qmax(trc b) 14,52 15,49 12,58 13,55 14,52 12,58

Qb 7 7,49 6,08 6,55 7 6,08Qmax(sau b) 7,52 8 6,5 7 7,52 6,5cos(sau b) 0,97 0,97 0,97 0,97 0,97 0,97

D n mn hc li in 2


26/67


CHNH VTNH TON CC TRNG THI VN HNH CA LI IN, CHN PHNG THC IU CHN

IN P PH HP VI YU CU CA CC TRM BIN PI.Ch ph ti cc i.Uo=110%.Um=110%.110=121kV1.Xt on 0-1


092,2km Qb1

S thay thS01

,

01S Z01

,,

01S 1 Sb1 Zb1 1,

0 S1

01S 1ktS 1bS

2

01B

-jQcd012

01B -jQcc01

Cc thng s:

+ng dyZ01=21,21+j20,28

SB 601 10.72,2322

=

+MBAUc,kV Uh,kV Un% nP ,

MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb1=1,27+j27,95

+Ph tiS1=30+j7,52MVALy in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

D n mn hc li in 2


27/67

Trng i hc bch khoa H NiMVAjQjPSkt 4,006,02,0.2029,0.2.2.2 001 +=+=+=

Tn tht cng sut trong cun dy ca cc MBA

dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 21

2

1

1+

=

=( ) ( )

MVAjj 01,209,0

25.100.2

52,730.5,10

25.2

52,730.12,022

2

22

+=+

++

Cng sut trc tng tr Zb1:MVAjjjSSS bb 53,909,3001,209,052,730111 +=+++=+=

Cng sut in dung cui v u on 0-1:

MVArB

UQQ dmcdcc 82,210.72,232.1102

.62012

0101====

Cng sut cui ng dy 0-1:MVAjjjjjQSSS ccktb 11,715,3082,24,006,053,909,300111

,,

01 +=+++=+=

Tn tht cng sut trn on 0-1:

( ) ( ) MVAjjjXRUSS

dm

61,168,128,2021,21110

11,715,302

22

01012

2,,

0101 +=++=+=

Cng sut trc tng tr Z01:MVAjjjSSS 72,883,3161,168,111,715,3001

,,

01

,

01 +=+++=+=

Cng sut nt ngun cung cp:MVAjjjjQSS cd 9,583,3182,272,883,3101

,

0101 +=+==

in p cc nt:Tn tht in p trn on 0-1:

kV

U

XQRPU 04,7

121

28,20.72,821,21.83,31..

0

01

,

0101

,

01

01=

+=

+=

in p ti im 1 l:kVUUU 96,11304,71210101 ===

Tn tht in p trong cun dy ca cc my bin p l:

kVU

XQRPU bbbbb 67,2

96,113

95,27.53,927,1.09,30..

1

1111

1=

+=

+=

in p trn thanh gp h p quy v pha in p cao l:kVUUU

bh29,11167,296,113

11

,

1===

in p thc trn thanh gp h p l:

kVUU hh 65,10115

11.29,111115

11.

,

11 ===

D n mn hc li in 2


28/67


2.Xt on 0-2-3.2AC-150 2AC-70 3 2x25MVA 3,

0 S3

63,25km 44,72km

22x32MVA Qb3

2,

Qb2 S2

S thay th

0 S01, Z02 S02,, S23 S23, Z23 S23,, 3 Sb3 Zb3 3,

S3S01 2

02S 2ktS 23S 3ktS 3bS

B02/2 B02/2 B23/2 -jQcc23 B23/2-jQcd02 -jQcc02 Sb2 -jQcd23

2bS

2,S2

Cc thng s:+ng dy

Z02=6,64+j13,16; Z02=10,29+j9,84; B02/2=173,31.10-6S; B23/2=115,38.10-6S+MBA

MBA Uc Uh Un% nP 0P I0% R X 0QB3 115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2B2 115 11 10,5 0,145 0,035 0,75 1,87 43,5 0,24

D n mn hc li in 2


29/67


Zb2=0,935+j21,75; Zb3=1,27+j27,95+Ph ti:S2=32+j8MVA; S3=26+j6,5MVA

Ly in p cc nt (tr nt o) bng in p danh nh ca mng

in,Udd=110kVTn tht cng sut trong ni st ca cc MBA trm 3 lMVAjQjPSkt 4,006,02,0.2029,0.2.2.2 003 +=+=+=

Tn tht cng sut trong cun dy ca cc MBA B3

dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 23

2

3

3 +

=

=( (

MVAjj 51,107,025.100.2

5,626.5,10

25.2

5,626.12,022

2

22

+=+

++



MVArB

UQQ dmcdcc 40,110.38,115.1102

.62232

2323 ====


,,

23+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

60,062,084,929,10110

01,713,262

22

23232

2,,

23

23+=+

+=+=

Cng sut trc tng tr Z23: MVAjjjSSS 61,775,2660,062,001,713,2623,,23,23 +=+++=+=MVAjjjjQSS cd 21,675,2640,161,775,2623

,

2323+=+==

Tn tht cng sut trong ni st ca cc MBA trm 2 lMVAjQjPSkt 48,007,024,0.2035,0.2.2.2 002 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 22

2

2

2+

=

= ( ) ( ) MVAjj 79,108,032.100.2832.5,10

32.2832.12,0

22

2

22

+=+++

Cng sut trc tng tr Zb2:MVAjjjSSS bb 79,908,3279,108,0832222 +=+++=+=


MVArB

UQQ dmcdcc 10,210.31,173.1102

.62022

0202====

Cng sut cui ng dy 0-2:

D n mn hc li in 2


30/67


MjjjjjjQSSSSccktb

38,1490,5810,248,007,079,908,3221,675,26022223

,,

01 +=+++++=++=


( ) ( ) MVAjjjXRU

SS

dm

00,402,216,1364,6110

38,1490,582

22

02022

2,,

02

02+=+

+=+=


02

,,

02

,

02+=+++=+=


,

0202 +=+==

in p cc ntTn tht in p trn on 0-2:

kVU

XQRPU 34,5

121

16,13.38,1864,6.92,60..

0

02

,

0202

,

02

02=

+=

+=

in p ti im 2 l:kVUUU 66,11534,51210202 ===

Tn tht in p trong cun dy ca cc my bin p B2 l:kV

U

XQRPU bbbbb 13,2

66,115

75,21.97,9935,0.08,32..

2

2222

2=

+=

+=

in p trn thanh gp h p ca trm 2 quy v pha in p cao l:kVUUU bh 53,11313,266,11522

,

2===

in p thc trn thanh gp h p ca trm 2 l:

kVUU hh 86,10115

11.53,113

115

11.

,

22===

Tn tht in p trn on 2-3:

kVU

XQRPU 03,3

66,115

84,9.61,729,10.75,26..

2

23

,

2323

,

23

23=

+=

+=

in p ti im 3 l:kVUUU 63,11203,366,1152323 ===

Tn tht in p trong cun dy ca cc my bin p B3 l:

kVU

XQRPU bbbb 28,2

63,112

95,27.01,827,1.07,26..

3

3333

3=

+=

+=

in p trn thanh gp h p ca trm 3 quy v pha in p cao l:kVUUU

bh35,11028,263,112

33

,

3 ===


kVUU hh 56,10115

11.35,110

115

11.

,

33 ===

D n mn hc li in 3


31/67


3.Xt on 0-42AC-70 4 2x25MVA 4,

S4max0

76,16km Qb4

S thay thS04

,

04S Z04

,,

04S 4 Sb4 Zb4 4,

0 S4

04S 4ktS 4bS

2

04B

-jQcd042

04B

-jQcc04

Cc thng s:+ng dyZ04=17,52+j16,76

SB 604

10.49,1962

=

+MBAUc,kV Uh,kV Un% nP ,MW

0P ,

MWI0% R, X, 0Q ,

MVAr115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb4=1,27+j27,95

+Ph tiS4=28+j7MVALy in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 004 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 24

2

4

4 +

=

D n mn hc li in 3


32/67


=( ) ( )

MVAjj 75,108,025.100.2

728.5,10

25.2

728.12,022

2

22

+=+

++



MVArB

UQQ dmcdcc 38,210.49,196.1102

. 620420404 ====

Cng sut cui ng dy 0-4:MVAjjjjjQSSS

ccktb77,614,2838,24,006,075,808,28

0444

,,

04 +=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

16,121,176,1652,17110

77,614,282

22

04042

2,,

04

04+=+

+=+=


,,

04

,

04 +=+++=+=

Cng sut nt ngun cung cp: MVAjjjjQSS cd 55,535,2938,293,735,2904,

0404 +=+==


kVU

XQRPU 35,5

121

76,16.93,752,17.35,29..

0

04

,

0404

,

04

04=

+=

+=

in p ti im 4 l:kVUUU 65,11535,51210404 ===


kV

U

XQRPU bbbbb 42,2

65,115

95,27.75,827,1.08,28..

4

4444

4 =+

=+

=

in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 23,11342,265,11544

,

4===


kVUU hh 83,10115

11.23,113

115

11.

,

44 ===

4.Xt on 0-52AC-70 5 2x25MVA 5,

S5max0

92,2km Qb5

S thay th

D n mn hc li in 3


33/67


S05,

05S Z05

,,

05S 5 Sb5 Zb5 5,

0 S5

05S 5ktS 5bS

2

05B

-jQcd052

05B -jQcc05


SB 605 10.72,2322

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb5=1,27+j27,95

+Ph tiS5=30+j7,52MVA

Ly in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 005 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 25

2

5

5+

=

=( ) ( )

MVAjj 01,209,025.100.2

52,730.5,10

25.2

52,730.12,022

2

22

+=+

++

Cng sut trc tng tr Zb5: MVAjjjSSS bb 53,909,3001,209,052,730555 +=+++=+=Cng sut in dung cui v u on 0-5:

MVArB

UQQ dmcdcc 82,210.72,232.1102

.62052

0505====


,,

05 +=+++=+=


D n mn hc li in 3


34/67


( ) ( ) MVAjjjXRU

SS

dm

61,168,128,2021,21110

11,715,302

22

05052

2,,

05

05 +=++

=+=


05

,,

05

,

05+=+++=+=


,0505 +=+==


kVU

XQRPU 04,7

121

28,20.72,821,21.83,31..

0

05

,

0505

,

05

05 =+

=+

=

in p ti im 5 l:kVUUU 96,11304,71210505 ===


kVU

XQRPU bbbbb 67,2

96,113

95,27.53,927,1.09,30..

5

5555

5=

+=

+=


,

5 ===


kVUU hh 65,10115

11.29,111

115

11.

,

55===

5.Xt on 0-62AC-70 6 2x25MVA 6,

S6max0

63,25km Qb6

S thay thS06

,

06S Z06

,,

06S 6 Sb6 Zb6 6,

0 S6

06S 6ktS 6bS

2

06B

-jQcd062

06B -jQcc06


D n mn hc li in 3


35/67


SB 606 10.19,1632

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2Zb6=1,27+j27,95

+Ph tiS6=26+j6,5MVALy in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 006 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 26

2

6

6+

=

=( ) ( )

MVAjj 51,107,025.100.2

5,626.5,10

25.2

5,626.12,022

2

22

+=+

++



MVArB

UQQdmcdcc

97,110.19,163.1102

.62062

0606

====


,,

06+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

83,087,092,1355,14110

44,613,262

22

06062

2,,

06

06 +=++

=+=


,,

06

,

06 +=+++=+=


,0606 +=+==


kVU

XQRPU 08,4

121

92,13.27,755,14.27..

0

06

,

0606

,

06

06=

+=

+=

in p ti im 6 l:kVUUU 92,11608,41210606 ===


D n mn hc li in 3


36/67


kVU

XQRPU bbbbb 12,2

92,116

95,27.01,827,1.07,26..

6

6666

6=

+=

+=


,

6===


kVUU hh 98,10115

11.80,114

115

11.,66 ===

6.Tng ktPF=Pyc=P01+ P02+ P04+ P05+ P06=31,83+60,92+29,35+31,83+27=180,93MWQyc=Q01+ Q02+ Q04+ Q05+ Q06=5,9+16,28+5,55+5,9+5,3=38,93MVArQF=PF.tgF=180.93.0,62=112,18MVArTa c QF>Qyc nn ta khng phi b k thut.Tng tn tht khng ti trong cc MBA l:

=+++++==

6

10

37,006,006,006,006,007,006,0MWPP kti

Tng tn tht cng sut tc dng trong cun dy ca cc MBA l

MWPPbicu

48,007,009,007,008,009,06

1

=++++== Tng tn tht cng sut tc dng trn cc on ng dy l

MWPPPPPPPd 08,887,068,121,162,002,268,1060504230201 =+++++=+++++=

Tng tn tht cng sut trong thit b b l

( ) MWQP bitb 20,008,6755,608,649,77005,0.005,06

1

=+++++==

Tng tn tht cng sut tc dng trong h thng lMWPPPPP tbdcuo 13,920,008,848,037,0 =+++=+++=

Tng tn tht in nng trong mng l( )

( ) hMW

TPtPPPA tbdcu

.36,334395000.20,08760.37,03411.08,848,0

...max0

=+++=

+++=

D n mn hc li in 3


37/67


II.Ch ph ti cc tiu.Uo=105%.Um=105%,110=115.5kV

Smin=70%.Smax

Khi Smin th phi ct cc thit b b v nu b th tn tht trn ng dy v trm

bin p gim khng ng k so vi chi ph vn hnh thit b b. ng thi gim tn tht cng sut trong cc trm bin p ta phi xt n iu kin ct 1

MBA vn hnh song song

n

dmP

PSS

< 0.2

Trong :

S: cng sut ph ti

Sdm:cng sut nh mc ca MBA

nPP ,0 : tn tht khng ti v ngn mch ca MBA

Ta c

38,17120

29.2.2533,23

9,0

30.7,01 =>==S

23,22145

35.2.3289,24

9,0

32.7,02 =>==S

38,17120

29.2.2522,20

9,0

26.7,03 =>==S

38,17120

29.2.2578,21

9,0

28.7,04 =>==S

38,17120

29.2.2533,23

9,0

30.7,05 =>==S

38,17120

29.2.2522,20

9,0

26.7,06 =>==S

Vy trong ch ph ti cc tiu th mi trm u c 2 MBA lm vic song

song

D n mn hc li in 3


38/67


39/67


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 21

2

1

1+

=

=( ) ( )

MVAjj 14,105,025.100.2

16,1021.5,10

25.2

16,1026.12,022

2

22

+=+++

Cng sut trc tng tr Zb1:

MVAjjjSSS bb 30,1105,2114,105,016,1021111 +=+++=+=


MVArB

UQQ dmcdcc 82,210.72,232.1102

.62012

0101====


,,

01+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

88,092,028,2021,21110

88,811,212

22

01012

2,,

01

01 +=++

=+=


,,

01

,

01+=+++=+=


,

0101 +=+==


kVU

XQRPU 76,5

5,115

28,20.76,921,21.03,22..

0

01

,

0101

,

01

01=

+=

+=

in p ti im 1 l:kVUUU 74,10976,55,1150101 ===


kVU

XQRPU bbbb

b12,3

74,109

95,27.30,1127,1.05,21..

1

1111

1=

+=

+=


,

1 ===


kVUU hh 20,10115

11.62,106

115

11.

,

11 ===

D n mn hc li in 3


40/67


2.Xt on 0-2-3.2AC-150 2AC-70 3 2x25MVA 3,

0 S3

63,25km 44,72km

22x32MVA

2,

S2S thay th

0 S01, Z02 S02,, S23 S23, Z23 S23,, 3 Sb3 Zb3 3,

S3S01 2



2bS

2,S2

Cc thng s:+ng dy

Z02=6,64+j13,16; Z02=10,29+j9,84; B02/2=173,31.10-6S; B23/2=115,38.10-6S+MBA


D n mn hc li in 4


41/67


Zb2=0,935+j21,75; Zb3=1,27+j27,95+Ph ti:S2=0,7(32+j15,49)=22,40+j10,84MVA; S3=0,7(26+j12,58)=18,2+j8,81MVA

Ly in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA trm 3 l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 003 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 23

2

3

3 +

=

=( ) ( )

MVAjj 86,004,025.100.2

81,820,18.5,10

25.2

81,820,18.12,022

2

22

+=+

++

Cng sut trc tng tr Zb3: MVAjjjSSS bb 67,924,1886,004,081,820,18333 +=+++=+=Cng sut in dung cui v u on 2-3:

MVArB

UQQ dmcdcc 40,110.38,115.1102

.62232

2323 ====


ccktb67,830,1840,14,006,067,924,18

2333

,,

23+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

33,035,084,929,10110

67,830,182

22

23232

2,,

23

23 +=++

=+=


23

,,

23

,

23+=+++=+=

MVAjjjjQSScd

60,765,1840,100,965,1823

,

2323+=+==



dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 22

2

2

2+

=

=( ) ( )

MVAjj 30,107,032.100.2

84,1040,22.5,10

32.2

84,1040,22.12,022

2

22

+=+

++

Cng sut trc tng tr Zb2:MVAjjjSSS bb 14,1247,2230,107,084,1040,22222 +=+++=+=


MVArB

UQQ dmcdcc 10,210.31,173.1102

.62022

0202====

D n mn hc li in 4


42/67



MVAj

jjjjjQSSSS ccktb

12,1819,41

21048,007,014,1247,2260,765,18022223

,,

01

+=

+++++=++=


( ) ( ) MVAjjjXRU

SS

dm

20,211,116,1364,6110

12,1819,412

22

02022

2,,

02

02 +=++

=+=


,,

02

,

02 +=+++=+=


,

0202 +=+==


kVU

XQRPU 75,45,115

16,13.32,2064,6.30,42..0

02

,

0202

,

0202 =+=+=

in p ti im 2 l:kVUUU 75,11075,45,1150202 ===


kVU

XQRPU bbbbb 75,2

75,110

75,21.14,12935,0.47,22..

2

2222

2=

+=

+=


bh18,10875,275,110

22

,

2===

in p thc trn thanh gp h p ca trm 2 l:kVUU hh 35,10

115

11.18,108

115

11.

,

22===


kVU

XQRPU 53,2

75,110

84,9.00,929,10.65,18..

2

23

,

2323

,

23

23=

+=

+=

in p ti im 3 l:kVUUU 22,10853,275,1102323 ===

Tn tht in p trong cun dy ca cc my bin p B3 l:kV

U

XQRPU bbbb 71,2

22,108

95,27.67,927,1.24,18..

3

3333

3=

+=

+=


,

3===


kVUU hh 09,10115

11.51,105

115

11.

,

33 ===

D n mn hc li in 4


43/67


D n mn hc li in 4


44/67


3.Xt on 0-42AC-70 4 2x25MVA 4,

S40

76,16km

S thay thS04

,

04S Z04,,

04S 4 Sb4 Zb4 4,0 S4

04S 4ktS 4bS

2

04B

-jQcd042

04B

-jQcc04


SB 604 10.49,1962

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb4=1,27+j27,95

+Ph tiS4=0,7(28+j13,55)=19,6+j9,49MVALy in p cc nt (tr nt o) bng in p danh nh ca mng

in,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 004 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 24

2

4

4 +

=

D n mn hc li in 4


45/67


=( ) ( )

MVAjj 00,105,025.100.2

49,96,19.5,10

25.2

49,96,19.12,022

2

22

+=+

++



MVArB

UQQ dmcdcc 38,210.49,196.1102

. 620420404 ====


,,

04+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

64,067,076,1652,17110

51,871,192

22

04042

2,,

04

04+=+

+=+=


,,

04

,

04+=+++=+=

Cng sut nt ngun cung cp: MVAjjjjQSS cd 77,638,2038,215,938,2004,0404 +=+==Tn tht in p trn on 0-4:

kVU

XQRPU 42,4

5,115

76,16.15,952,17.38,20..

0

04

,

0404

,

04

04=

+=

+=

in p ti im 4 l:kVUUU 08,11142,45,115

0404===


kV

U

XQRPU bbbbb 64,2

08,111

95,27.49,1027,1.65,19..

4

4444

4 =+

=+

=


,

4===


kVUU hh 37,10115

11.44,108

115

11.

,

44===

D n mn hc li in 4


46/67


5.Xt on 0-52AC-70 5 2x25MVA 5,

S50

92,2km

S thay thS05

,

05S Z05

,,

05S 5 Sb5 Zb5 5,

0 S5

05S 5ktS 5bS

2

05B

-jQcd052

05B

-jQcc05


SB 605 10.72,2322

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb5=1,27+j27,95

+Ph tiS5=0,7(30+j14,52)=21+j10,16MVA

Ly in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 005 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 25

2

5

5+

=

D n mn hc li in 4


47/67


=( ) ( )

MVAjj 14,105,025.100.2

16,1021.5,10

25.2

16,1026.12,022

2

22

+=+++



MVArB

UQQ dmcdcc 82,210.72,232.1102

. 620520505 ====


,,

01+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

88,092,028,2021,21110

88,811,212

22

05052

2,,

05

05+=+

+=+=


,,

05

,

05+=+++=+=

Cng sut nt ngun cung cp: MVAjjjjQSS cd 94,603,2282,276,903,2205,0505 +=+==in p cc ntTn tht in p trn on 0-5:

kVU

XQRPU 76,5

5,115

28,20.76,921,21.03,22..

0

05

,

0505

,

05

05=

+=

+=

in p ti im 5 l:kVUUU 74,10976,55,1150505 ===


kVU

XQRPU bbbbb 12,3

74,109

95,27.30,1127,1.05,21..

1

55555 =+=+=

in p trn thanh gp h p quy v pha in p cao l:kVUUU

bh62,10612,374,109

55

,

5===


kVUU hh 20,10115

11.62,106

115

11.

,

55===

D n mn hc li in 4


48/67


5.Xt on 0-62AC-70 6 2x25MVA 6,

S60

63,25km

S thay thS06

,

06S Z06

,,

06S 6 Sb6 Zb6 6,

0 S6

06S 6ktS 6bS

2

06B

-jQcd062

06B

-jQcc06


SB 606 10.19,1632

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb6=1,27+j27,95

+Ph tiS6=0,7(26+12,58)=18,20+j8,81MVALy in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kV

Tn tht cng sut trong ni st ca cc MBA lMVAjQjPSkt 4,006,02,0.2029,0.2.2.2 006 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 26

2

6

6+

=

=( ) ( )

MVAjj 86,004,025.100.2

81,82,18.5,10

25.2

81,82,18.12,022

2

22

+=+

++

D n mn hc li in 4


49/67




MVArB

UQQ dmcdcc 97,110.19,163.1102

.62062

0606 ====


,,

06+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

46,048,092,1355,14110

1,830,182

22

06062

2,,

06

06 +=++

=+=


,,

06

,

06+=+++=+=


,

0606+=+==

in p cc nt :Tn tht in p trn on 0-6:

kVU

XQRPU 40,3

5,115

92,13.56,855,14.78,18..

0

06

,

0606

,

06

06=

+=

+=

in p ti im 6 l:kVUUU 10,11240,35,115

0606===


kVU

XQRPU bbbbb 62,2

10,112

95,27.67,927,1.24,18..

6

6666

6=

+=

+=

in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 48,10962,210,11266,

6===


kVUU hh 47,10115

11.48,109

115

11.

,

66===

D n mn hc li in 4


50/67


III.Ch sau s c.

U0=110%.Um=110%.110=121kV

Gi thit dng 1 mch ca ng dy 2 mch . S c nng n nht khi sy ra

ch ph ti cc i. thi gian sy ra s c nh so vi thi gian vn hnh nn

ta khng tnh tn tht cng sut v in nng trong mng.

1.Xt on 0-1AC-70 1 2x25MVA 1,

S1max0

92,2km Qb1

S thay thS01

,

01S Z01,,

01S 1 Sb1 Zb1 1,0 S1

01S 1ktS 1bS

2

01B

-jQcd012

01B -jQcc01


SB 601 10.36,162

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb1=1,27+j27,95

+Ph tiS1=30+j7,52MVA

D n mn hc li in 5


51/67


52/67


2.Xt on 0-2-3.2AC-70 3 2x25MVA 3,

0 AC-150 S3

63,25km 44,72km

22x32MVA Qb3

2,

Qb2 S2

S thay th

0 S01, Z02 S02,, S23 S23, Z23 S23,, 3 Sb3 Zb3 3,

S3S01 2



2bS

2,S2

Cc thng s:+ng dy

Z02=13,28+j26,32; Z23=10,29+j9,84; B02/2=86,66.10-6S; B23/2=115,38.10-6S+MBA


D n mn hc li in 5


53/67


Zb2=0,935+j21,75; Zb3=1,27+j27,95+Ph ti:S2=32+j8MVA; S3=26+j6,5MVA

Ly in p cc nt (tr nt o) bng in p danh nh ca mng

in,Udd=110kVTn tht cng sut trong ni st ca cc MBA trm 3 lMVAjQjPSkt 4,006,02,0.2029,0.2.2.2 003 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 23

2

3

3 +

=

=( (

MVAjj 51,107,025.100.2

5,626.5,10

25.2

5,626.12,022

2

22

+=+

++



MVArB

UQQ dmcdcc 40,110.38,115.1102

.62232

2323 ====


,,

23+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

60,062,084,929,10110

01,713,262

22

23232

2,,

23

23+=+

+=+=

Cng sut trc tng tr Z23: MVAjjjSSS 61,775,2660,062,001,713,2623,,23,23 +=+++=+=MVAjjjjQSS cd 21,675,2640,161,775,2623

,

2323+=+==



dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 22

2

2

2+

=

= ( ) ( ) MVAjj 79,108,032.100.2832.5,10

32.2832.12,0

22

2

22

+=+++



MVArB

UQQ dmcdcc 05,110.66,86.1102

.62022

0202 ====


D n mn hc li in 5


54/67


MVAj

jjjjjQSSSS ccktb

43,159,58

05,148,007,079,908,3221,675,26022223

,,

01

+=

+++++=++=


( ) ( ) MVAjjjXRU

SS

dm

06,807,432,2628,13110

43,1590,582

22

02022

2,,

02

02+=+

+=+=


,,

02

,

02 +=+++=+=


,

0202+=+==


kVU

XQRPU 02,12

121

32,26.49,2328,13.97,62..

0

02

,

0202

,

02

02 =+

=+

=

in p ti im 2 l:kVUUU 98,10802,121210202 ===


kVU

XQRPU bbbbb 23,2

66,115

75,21.79,9935,0.08,32..

2

2222

2=

+=

+=


,

2===


kVUU hh 21,,10115

11.75,106

115

11.

,

22===


kVU

XQRPU 21,3

98,108

84,9.61,729,10.75,26..

2

23

,

2323

,

23

23=

+=

+=

in p ti im 3 l:kVUUU 77,10521,398,1082323 ===


kVU

XQRPU bbbb 43,2

77,105

95,27.01,827,1.07,26..

3

3333

3=

+=

+=


bh34,10343,277,105

33

,

3===


kVUU hh 88,9115

11.43,103

115

11.

,

33===

3.Xt on 0-4

D n mn hc li in 5


55/67


4 2x25MVA 4,AC-70 S4max

0 76,16kmQb4

S thay thS04

,

04S Z04,,

04S 4 Sb4 Zb4 4,0 S4

04S 4ktS 4bS

2

04B

-jQcd042

04B -jQcc04

Cc thng s:+ng dyZ04=2(17,52+j16,76)=35,04+j33,52

SB 6

6

04 10.25,982

10.49,196

2

==


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb4=1,27+j27,95+Ph tiS4=28+j7MVALy in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt

4,006,02,0.2029,0.2.2.2004

+=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 24

2

4

4 +

=

=( ) ( )

MVAjj 75,108,025.100.2

728.5,10

25.2

728.12,022

2

22

+=+

++


D n mn hc li in 5


56/67


57/67


5.Xt on 0-5AC-70 5 2x25MVA 5,

S5max0

92,2km Qb5

S thay thS05

,

05S Z05

,,

05S 5 Sb5 Zb5 5,

0 S5

05S 5ktS 5bS

2

05B

-jQcd052

05B

-jQcc05


SB 605 10.36,162

=


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb5=1,27+j27,95+Ph tiS5=30+j7,52MVALy in p cc nt (tr nt o) bng in p danh nh ca mngin,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 005 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 25

2

5

5+

=

=( ) ( )

MVAjj 01,209,025.100.2

52,730.5,10

25.2

52,730.12,022

2

22

+=+

++

Cng sut trc tng tr Zb5:

D n mn hc li in 5


58/67

Trng i hc bch khoa H NiMVAjjjSSS bb 53,909,3001,209,052,730555 +=+++=+=


MVArB

UQQ dmcdcc 41,110.36,116.1102

.62052

0505 ====


,,

05+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

29,344,356,4042,42110

52,815,302

22

05052

2,,

05

05+=+

+=+=


,,

05

,

05+=+++=+=


,

0505 +=+==

in p cc nt

Tn tht in p trn on 0-5:kV

U

XQRPU 73,15

121

56,40.81,1142,42.59,33..

0

05

,

0505

,

05

05=

+=

+=

in p ti im 5 l:kVUUU 27,10573,151210505 ===


kVU

XQRPU bbbbb 89,2

27,105

95,27.53,927,1.09,30..

5

5555

5=

+=

+=

in p trn thanh gp h p quy v pha in p cao l:

kVUUU bh38,10289,227,105

515

,

5 ===in p thc trn thanh gp h p l:

kVUU hh 79,9115

11.38,102

115

11.

,

55===

D n mn hc li in 5


59/67


5.Xt on 0-66 2x25MVA 6,

AC-70 S6max0 63,25km

Qb6

S thay thS06

,

06S Z06

,,

06S 6 Sb6 Zb6 6,

0 S6

06S 6ktS 6bS

2

06B

-jQcd062

06B

-jQcc06

Cc thng s:+ng dyZ06=2(14,55+j13,92)=29,10+j27,84

SB 6

6

06 10.60,812

10.19,163

2

==


MW0

P ,MW

I0% R, X, 0Q ,MVAr

115 11 10,5 0,12 0,029 0,8 2,54 55,9 0,2

Zb6=1,27+j27,95

+Ph tiS6=26+j6,5MVALy in p cc nt (tr nt o) bng in p danh nh ca mng

in,Udd=110kVTn tht cng sut trong ni st ca cc MBA l

MVAjQjPSkt 4,006,02,0.2029,0.2.2.2 006 +=+=+=


dm

n

dm

n

bS

SUj

S

SPS

.100.2

%.

2

. 26

2

6

6+

=

D n mn hc li in 5


60/67


=( ) ( )

MVAjj 51,107,025.100.2

5,626.5,10

25.2

5,626.12,022

2

22

+=+

++



MVArB

UQQ dmcdcc 99.010.60,81.1102

. 620620606 ====


ccktb42,713,2699,04,006,001,807,26

0666

,,

06+=+++=+=


( ) ( ) MVAjjjXRU

SS

dm

70,177,184,2710,29110

42,713,262

22

06062

2,,

06

06 +=++

=+=


,,

06

,

06 +=+++=+=

Cng sut nt ngun cung cp: MVAjjjjQSS cd 13,890,2799,012,990,2706,0606 +=+==in p cc ntTn tht in p trn on 0-6:

kVU

XQRPU 81,8

121

84,27.12,910,29.90,27..

0

06

,

0606

,

06

06=

+=

+=

in p ti im 6 l:kVUUU 19,11281,81210606 ===


kVU

XQRPU bbbbb 29,2

19,112

95,27.01,827,1.07,26..

6

66666 =+=+=


,

6===


kVUU hh 51,10115

11.90,109

115

11.

,

66===

D n mn hc li in 6


61/67


IV. Tng kt tnh ton cc ch

Gi tr in p ti thanh gp h p ca cc trm trong cc ch ph ti cc i cc tiu

v sau s c c ghi bng sau:

Trm BA Ch Uih,kV Uih,,kV

1Smax 10,65 111,29Smin 10,20 106,62sau s c 9,79 102,38

2

Smax 10,86 113,53Smin 10,35 108,18sau s c 10,21 106,75

3

Smax 10,56 110,35Smin 10,09 105,51sau s c 9,88 103,34

4Smax 10,83 113,23Smin 10,37 108,44sau s c 10,21 106,71

5

Smax 10,65 111,29Smin 10,20 108,44sau s c 9,79 102,38

6

Smax 10,98 114,80Smin 10,47 109,48sau s c 10,51 109,90

V.Chn phng thc iu chnh in p trong mng in.

Trong qu trnh vn hnh mng in, ph ti thay i t cc tiu n cc i,hoc

khi b s c nng n dn n in p trn thanh gp h p ca cc trm thay i

vt qu gii hn cho php. gi cho in p c gi tr trong phm vi cho php

ta tin hnh iu chnh in p. Trong n mn hc ny ta dng cc MBA iu

chnh di ti iu chnh in p vi yu cu iu chnh in p khc thng

Cc yu cu ca iu chnh in p khc thng l:

+ Ch ph ti cc i dU%=5%

+Ch ph ti cc tiu dU%=0%

+Ch s c dU%=5%

Cc MBA c Ucd=115kV, Uhd=11kV, phm vi iu chnh 9.1,8%

D n mn hc li in 6


62/67


in p ca cc u iu chnh tiu chun c ghi bng di y

u

iu

chnh

-4 -3 -2 -1 0 1 2 3

U,kV 106,812 108,859 110,906 112,953 115 117,047 119,094 121,14

Tnh cho ph ti 1.

Theo phn IV ta c in p trn thanh gp h p quy i v pha in p cao

trong cc ch Smax, Smin v sau s c l.

kVU 29,111,

ln1 = , kVU nh 62,106,

1 = , kVU sc 38,102,1 =

in p yu cu trn thanh gp h p ca cc trm trong cc ch c tnh nh

sau:Uycln=Um+dU%.Um=10+5%.10=10,5kV

Uycnh=Um+dU%.Um=10+0%.10=10kV

Uycsc=Um+dU%.Um=10+5%.10=10,5kV

*Khi ph ti cc i.

kVU

UUU

yc

hdd

dc 59,1165,10

11.29,111.

ln

,

ln1

ln1===

Vy ta chn u iu chnh tiu chun 1 vi Uctc=117,047kV

in p thc trn thanh gp h p ca trm 1 l

kVU

UUU

dctc

hddt 46,10

047,117

11.29,111.,

ln1

ln1===

%6,4100.10

1046,10100.%

ln1

ln1=

=

=

dm

dmt

U

UUU

Vy u iu chnh chn l ph hp.*Khi ph ti cc tiu.

kVU

UUU

ycnh

hddnhdcnh 28,117

10

11.62,106.,

1

1===

Vy ta chn u iu chnh tiu chun 1 vi Uctc=117,047kV


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kVU

UUU

dctc

hddnh

nht 02,10047,117

11.62,106.,

1

1===

%2,0100.10

1002,10100.%

1

1=

=

=

dm

dmnht

nhU

UUU

Vy u iu chnh chn l ph hp.*Khi ph sau s c.

kVU

UUU

y

hddsc

d 26,1075,10

11.38,102.

csc

,

1

csc1===

Vy ta chn u iu chnh tiu chun -4 vi Uctc=106,812kV


kVU

UUU

d

hddsc

sct54,10

812,106

11.38,102.

csc

,

1

1 ===

%4,5100.10

1054,10100.%

1

1=

=

=

dm

dmsct

scU

UUU

Vy u iu chnh chn l ph hp.

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Cc ph ti cn li tnh ton tng t nh ph ti 1 ta c bng kt qu sau.

Ph ti 1 2 3 4 5 6,

lnU 111,29 113,53 110,35 113,23 111,29 114,80,

nhU 106,62 108,18 105,51 108,44 106,62 109,48

,

scU 102,38 106,75 103,34 106,71 102,38 109,90

Ucln 116,59 118,94 115,60 118,62 116,59 120,27n/Uclntc 1/117,047 2/119,094 0/115 2/119,094 1/117,047 3/121,141Ulnt 10,46 19,49 10,56 10,46 10,46 10,42

%ln

U 4,6 4,9 5,6 4,6 4,6 4,2Ucnh 117,28 119,00 116,06 119,28 117,28 120,43n/Ucnhtc 1/117,047 2/119,094 1/117,047 2/119,094 1/117,047 3/121,141Unht 10,02 9,99 9,92 10,02 10,02 9,94

%nh

U 0,2 -0,1 -0,8 0,2 0,2 -0,6

Ucsc 107,26 111,83 108,26 111,79 107,26 115,13n/Ucsctc -4/106,812 -2/110,906 -3/108,859 -2/110,906 -4/106,812 0/115Usct 10,54 10,59 10,44 10,58 10,54 10,51

%sc

U 5,4 5,9 4,4 5,8 5,4 5,1

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CHNG VI

TNH TON GI THNH TI IN.

I.Tng vn u t xy dng mng in

K=Kd+Ktb+Kt

trong :

Kd: Tng vn u t xy dng ng dy.

= iid lKK .0

Theo s liu chng II ta c Kd=163,42.109

Kt: Tng vn u t xy dng trm bin p.

= tit KK

Sau y l bng sut u t cho 1 trm c 1 MBA 110kV

Sm,MVA 16 25 32 40 63 80Kt,106 13000 19000 22000 25000 35000 42000

Vi trm c 2 MBA th phi nhn h s hiu chnh l 1,8.

Trong h thng c: 5trm, mi trm 2 MBA 25 MVA

1 trm 2 MBA 32 MVAVy ta c: Kt=1,8(5.19000.106+22000.106)=210,6.109

Ktb: Tng vn u t thit b b.

===96

0 10.03,62,40.10.150. bitb KKK

Vy tng v u t xy dng mng in l

K=Kd+Kt+Ktb=(163,42+210,6+6,03).109=380,05.109

II.Xc nh cc chi ph vn hnh hng nm ca mng in.Chi ph vn hnh hng nm.

CAKaKaKaYtbtbttdd .... +++=

Trong :

da : h s khu hao v hao mn v phc v ng dy, da =0,04

ta : h s khu hao v hao mn v phc v trm bin p, ta =0,1

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tba : h s khu hao v hao mn v phc v thit b b, tba =0,1

A :tng tn tht in nng trong mng, theo kt qu chngV ta c

A =33439,36MW.h

C: gi tin 1MW.h in nng tn hao, C=500.103/MW.h

Vy ta c:

Y=0,04.163,42.109+0,1.210,6.109+0,1.6,03.109+33439,36.500.103=44,92.109

III.Tnh cc chi ph tnh ton hng nm ca mng in.

Z=atc.K+Y

Trong :

atc: h s thu hi vn u t,atc=0,125

Suy ra Z=0,125.380,05.109+44,92.109=92,43.109Tng tn tht cng sut trong mng ch ph ti cc i l

MWPPPPP tbdcu 13,92,008,848,037,00 =+++=+++=

%31,5100.172

13,9100.%

max

==

=P

PP

Tng tn tht in nng trong mng l hMWA .36,33439=

%89,3100.

5000.172

36,33439100.% ==

=

A

AA

Sut u t xy dng mng in cho 1 kW cng sut ph ti cc i l

6

3

9

max

0 10.21,210.172

10.05,380===

PK

k /kW

Gi thnh ti 1kW.h in nng n ph ti l

23,5210.860000

10.92,443

9

===A

Y /kW.h

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IV. Bng tng kt cc ch tiu kinh t v k thut ca mng in.

cc ch tiu n v gi tr ghi chbtUmax % 9,47scUmax % 15,71

l km 431,78

maxP MW 172K 109ng 308,05Kd 109ng 163,42Kt 109ng 210,6Ktb 109ng 6,03P MW 9,13%P % 5,31A MW.h 33439,36%A % 3,89

Y 109ng 44,92Z 109ng 92,43k0 106ng/kW 2,21 ng/kW.h 52,23

Thiet Ke Do an Luoi Dien 6293

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