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Trng i hc bch khoa H Ni
Thit k n
Li in
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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
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Trng i hc bch khoa H Ni
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
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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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Trng i hc bch khoa H Ni
-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
===
Vy ta chnFtc0-4=150mm2 vi Icp=445A>Isc=314,90A
*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 ===
Vy ta chnFtc4-3=70mm2 vi Icp=265A>Isc=151,60A
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Trng i hc bch khoa H Ni
*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.
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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
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3
4
1
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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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Trng i hc bch khoa H Ni
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
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 0-1 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 .
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3
4
1
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Trng i hc bch khoa H Ni
%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
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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
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 0-1 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
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4
1
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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
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Trng i hc bch khoa H Ni
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
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Trng i hc bch khoa H Ni
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
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Trng i hc bch khoa H Ni
=== 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
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Trng i hc bch khoa H Ni
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
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Trng i hc bch khoa H Ni
*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
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Trng i hc bch khoa H Ni
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
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
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Trng i hc bch khoa H Ni
( ) 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
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Trng i hc bch khoa H Ni
( ) ( ) ( ) ( ) ( )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
s thay th 0 4 4, Q4R04 Rb4
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
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Trng i hc bch khoa H Ni
( ) ..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
Ta ch b n cos=0,97 MVArtgPQQtg b 55,625,0.28.25,0 444 ====
MVArQQb 752,752,1452,711 ===4.on 0-5.
2AC-70 5 2x25MVA 5,S5max
092,2km Qb5
s thay th 0 5 5, Q5R05 Rb5
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
Q
Z
MVArQQb 48,1004,452,1476,55
22555
===
( )99,0
04,430
30cos
222
55
2
5
5
5=
+=
+
=
bQQP
P >0,97
Ta ch b n cos=0,97 MVArtgPQQtg b 52,725,0.30.25,0 555 ====
MVArQQb 752,752,1452,755 ===
D n mn hc li in 2
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Trng i hc bch khoa H Ni
5.on 0-6.
2AC-70 6 2x25MVA 6,S6max
0
63,25km Qb6
s thay th 0 6 6, Q6R06 Rb6
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
Ta ch b n cos=0,97 MVArtgPQQtg b 5,625,0.26.25,0 666 ====
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
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Trng i hc bch khoa H Ni
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
2AC-70 1 2x25MVA 1,S1max
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
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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
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Trng i hc bch khoa H Ni
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
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Trng i hc bch khoa H Ni
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
+=+
++
Cng sut trc tng tr Zb3:MVAjjjSSS bb 01,807,2651,107,05,626333 +=+++=+=
Cng sut in dung cui v u on 2-3:
MVArB
UQQ dmcdcc 40,110.38,115.1102
.62232
2323 ====
Cng sut cui ng dy 2-3:MVAjjjjjQSSS ccktb 01,713,2640,14,006,001,807,262333
,,
23+=+++=+=
Tn tht cng sut trn on 2-3:
( ) ( ) 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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA B2
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 +=+++=+=
Cng sut in dung cui v u on 0-2:
MVArB
UQQ dmcdcc 10,210.31,173.1102
.62022
0202====
Cng sut cui ng dy 0-2:
D n mn hc li in 2
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Trng i hc bch khoa H Ni
MjjjjjjQSSSSccktb
38,1490,5810,248,007,079,908,3221,675,26022223
,,
01 +=+++++=++=
Tn tht cng sut trn on 0-2:
( ) ( ) MVAjjjXRU
SS
dm
00,402,216,1364,6110
38,1490,582
22
02022
2,,
02
02+=+
+=+=
Cng sut trc tng tr Z02:MVAjjjSSS 38,1892,6000,402,238,1490,58
02
,,
02
,
02+=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 28,1692,6010,238,1892,6002
,
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 ===
in p thc trn thanh gp h p ca trm 3 l:
kVUU hh 56,10115
11.35,110
115
11.
,
33 ===
D n mn hc li in 3
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Trng i hc bch khoa H Ni
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
dm
n
dm
n
bS
SUj
S
SPS
.100.2
%.
2
. 24
2
4
4 +
=
D n mn hc li in 3
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Trng i hc bch khoa H Ni
=( ) ( )
MVAjj 75,108,025.100.2
728.5,10
25.2
728.12,022
2
22
+=+
++
Cng sut trc tng tr Zb4:MVAjjjSSS bb 75,808,2875,108,0728444 +=+++=+=
Cng sut in dung cui v u on 0-4:
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 +=+++=+=
Tn tht cng sut trn on 0-4:
( ) ( ) MVAjjjXRU
SS
dm
16,121,176,1652,17110
77,614,282
22
04042
2,,
04
04+=+
+=+=
Cng sut trc tng tr Z04:MVAjjjSSS 93,735,2916,121,177,614,2804
,,
04
,
04 +=+++=+=
Cng sut nt ngun cung cp: MVAjjjjQSS cd 55,535,2938,293,735,2904,
0404 +=+==
Tn tht in p trn on 0-4:
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 ===
Tn tht in p trong cun dy ca cc my bin p l:
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===
in p thc trn thanh gp h p l:
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
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Trng i hc bch khoa H Ni
S05,
05S Z05
,,
05S 5 Sb5 Zb5 5,
0 S5
05S 5ktS 5bS
2
05B
-jQcd052
05B -jQcc05
Cc thng s:+ng dyZ05=21,21+j20,28
SB 605 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
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
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====
Cng sut cui ng dy 0-5:MVAjjjjjQSSS ccktb 11,715,3082,24,006,053,909,300555
,,
05 +=+++=+=
Tn tht cng sut trn on 0-5:
D n mn hc li in 3
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Trng i hc bch khoa H Ni
( ) ( ) MVAjjjXRU
SS
dm
61,168,128,2021,21110
11,715,302
22
05052
2,,
05
05 +=++
=+=
Cng sut trc tng tr Z05:MVAjjjSSS 72,883,3161,168,111,715,30
05
,,
05
,
05+=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 9,583,3182,272,883,3105
,0505 +=+==
Tn tht in p trn on 0-5:
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 ===
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..
5
5555
5=
+=
+=
in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 29,11167,296,11355
,
5 ===
in p thc trn thanh gp h p l:
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
Cc thng s:+ng dyZ06=14,55+j13,92
D n mn hc li in 3
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Trng i hc bch khoa H Ni
SB 606 10.19,1632
=
+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 0,2Zb6=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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
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
+=+
++
Cng sut trc tng tr Zb6:MVAjjjSSS bb 01,807,2651,107,05,626666 +=+++=+=
Cng sut in dung cui v u on 0-6:
MVArB
UQQdmcdcc
97,110.19,163.1102
.62062
0606
====
Cng sut cui ng dy 0-6:MVAjjjjjQSSS ccktb 44,613,2697,14,006,001,807,260666
,,
06+=+++=+=
Tn tht cng sut trn on 0-6:
( ) ( ) MVAjjjXRU
SS
dm
83,087,092,1355,14110
44,613,262
22
06062
2,,
06
06 +=++
=+=
Cng sut trc tng tr Z06:MVAjjjSSS 27,700,2783,087,044,613,2606
,,
06
,
06 +=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 3,500,2797,127,700,2706
,0606 +=+==
Tn tht in p trn on 0-6:
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 ===
Tn tht in p trong cun dy ca cc my bin p l:
D n mn hc li in 3
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Trng i hc bch khoa H Ni
kVU
XQRPU bbbbb 12,2
92,116
95,27.01,827,1.07,26..
6
6666
6=
+=
+=
in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 80,11412,292,11666
,
6===
in p thc trn thanh gp h p l:
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
=+++=
+++=
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Trng i hc bch khoa H Ni
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
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Trng i hc bch khoa H Ni
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 +=+++=+=
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 88,811,2182,24,006,030,1105,210111
,,
01+=+++=+=
Tn tht cng sut trn on 0-1:
( ) ( ) MVAjjjXRU
SS
dm
88,092,028,2021,21110
88,811,212
22
01012
2,,
01
01 +=++
=+=
Cng sut trc tng tr Z01:MVAjjjSSS 76,903,2288,092,088,811,2101
,,
01
,
01+=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 94,603,2282,276,903,2201
,
0101 +=+==
in p cc ntTn tht in p trn on 0-1:
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 ===
Tn tht in p trong cun dy ca cc my bin p l:
kVU
XQRPU bbbb
b12,3
74,109
95,27.30,1127,1.05,21..
1
1111
1=
+=
+=
in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 62,10612,374,10911
,
1 ===
in p thc trn thanh gp h p l:
kVUU hh 20,10115
11.62,106
115
11.
,
11 ===
D n mn hc li in 3
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Trng i hc bch khoa H Ni
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
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 4
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Trng i hc bch khoa H Ni
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 +=+=+=
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 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 ====
Cng sut cui ng dy 2-3:MVAjjjjjQSSS
ccktb67,830,1840,14,006,067,924,18
2333
,,
23+=+++=+=
Tn tht cng sut trn on 2-3:
( ) ( ) MVAjjjXRU
SS
dm
33,035,084,929,10110
67,830,182
22
23232
2,,
23
23 +=++
=+=
Cng sut trc tng tr Z23:MVAjjjSSS 00,965,1833,035,067,830,18
23
,,
23
,
23+=+++=+=
MVAjjjjQSScd
60,765,1840,100,965,1823
,
2323+=+==
Tn tht cng sut trong ni st ca cc MBA trm 2 lMVAjQjPSkt 48,007,024,0.2035,0.2.2.2 002 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA B2
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 +=+++=+=
Cng sut in dung cui v u on 0-2:
MVArB
UQQ dmcdcc 10,210.31,173.1102
.62022
0202====
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Trng i hc bch khoa H Ni
Cng sut cui ng dy 0-2:
MVAj
jjjjjQSSSS ccktb
12,1819,41
21048,007,014,1247,2260,765,18022223
,,
01
+=
+++++=++=
Tn tht cng sut trn on 0-2:
( ) ( ) MVAjjjXRU
SS
dm
20,211,116,1364,6110
12,1819,412
22
02022
2,,
02
02 +=++
=+=
Cng sut trc tng tr Z02:MVAjjjSSS 32,2030,4220,211,112,1819,4102
,,
02
,
02 +=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 22,1830,4210,232,2030,4202
,
0202 +=+==
in p cc ntTn tht in p trn on 0-2:
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 ===
Tn tht in p trong cun dy ca cc my bin p B2 l:
kVU
XQRPU bbbbb 75,2
75,110
75,21.14,12935,0.47,22..
2
2222
2=
+=
+=
in p trn thanh gp h p ca trm 2 quy v pha in p cao l:kVUUU
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===
Tn tht in p trn on 2-3:
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=
+=
+=
in p trn thanh gp h p ca trm 3 quy v pha in p cao l:kVUUU bh 51,10571,222,10833
,
3===
in p thc trn thanh gp h p ca trm 3 l:
kVUU hh 09,10115
11.51,105
115
11.
,
33 ===
D n mn hc li in 4
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Trng i hc bch khoa H Ni
D n mn hc li in 4
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Trng i hc bch khoa H Ni
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
Cc thng s:+ng dyZ04=17,52+j16,76
SB 604 10.49,1962
=
+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
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
dm
n
dm
n
bS
SUj
S
SPS
.100.2
%.
2
. 24
2
4
4 +
=
D n mn hc li in 4
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Trng i hc bch khoa H Ni
=( ) ( )
MVAjj 00,105,025.100.2
49,96,19.5,10
25.2
49,96,19.12,022
2
22
+=+
++
Cng sut trc tng tr Zb4:MVAjjjSSS bb 49,1065,1900,105,049,96,19444 +=+++=+=
Cng sut in dung cui v u on 0-4:
MVArB
UQQ dmcdcc 38,210.49,196.1102
. 620420404 ====
Cng sut cui ng dy 0-4:MVAjjjjjQSSS ccktb 51,871,1938,24,006,049,1065,190444
,,
04+=+++=+=
Tn tht cng sut trn on 0-4:
( ) ( ) MVAjjjXRU
SS
dm
64,067,076,1652,17110
51,871,192
22
04042
2,,
04
04+=+
+=+=
Cng sut trc tng tr Z04:MVAjjjSSS 15,938,2064,067,051,871,1904
,,
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===
Tn tht in p trong cun dy ca cc my bin p l:
kV
U
XQRPU bbbbb 64,2
08,111
95,27.49,1027,1.65,19..
4
4444
4 =+
=+
=
in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 44,10864,208,11144
,
4===
in p thc trn thanh gp h p l:
kVUU hh 37,10115
11.44,108
115
11.
,
44===
D n mn hc li in 4
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Trng i hc bch khoa H Ni
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
Cc thng s:+ng dyZ05=21,21+j20,28
SB 605 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
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
dm
n
dm
n
bS
SUj
S
SPS
.100.2
%.
2
. 25
2
5
5+
=
D n mn hc li in 4
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Trng i hc bch khoa H Ni
=( ) ( )
MVAjj 14,105,025.100.2
16,1021.5,10
25.2
16,1026.12,022
2
22
+=+++
Cng sut trc tng tr Zb5:MVAjjjSSS bb 30,1105,2114,105,016,1021555 +=+++=+=
Cng sut in dung cui v u on 0-5:
MVArB
UQQ dmcdcc 82,210.72,232.1102
. 620520505 ====
Cng sut cui ng dy 0-1:MVAjjjjjQSSS ccktb 88,811,2182,24,006,030,1105,210111
,,
01+=+++=+=
Tn tht cng sut trn on 0-5:
( ) ( ) MVAjjjXRU
SS
dm
88,092,028,2021,21110
88,811,212
22
05052
2,,
05
05+=+
+=+=
Cng sut trc tng tr Z05:MVAjjjSSS 76,903,2288,092,088,811,2105
,,
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 ===
Tn tht in p trong cun dy ca cc my bin p l:
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===
in p thc trn thanh gp h p l:
kVUU hh 20,10115
11.62,106
115
11.
,
55===
D n mn hc li in 4
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Trng i hc bch khoa H Ni
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
Cc thng s:+ng dyZ06=14,55+j13,92
SB 606 10.19,1632
=
+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
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
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
+=+
++
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Trng i hc bch khoa H Ni
Cng sut trc tng tr Zb6:MVAjjjSSS bb 67,924,1886,004,081,820,18666 +=+++=+=
Cng sut in dung cui v u on 0-6:
MVArB
UQQ dmcdcc 97,110.19,163.1102
.62062
0606 ====
Cng sut cui ng dy 0-6:MVAjjjjjQSSS ccktb 1,830,1897,14,006,067,924,180666
,,
06+=+++=+=
Tn tht cng sut trn on 0-6:
( ) ( ) MVAjjjXRU
SS
dm
46,048,092,1355,14110
1,830,182
22
06062
2,,
06
06 +=++
=+=
Cng sut trc tng tr Z06:MVAjjjSSS 56,878,1846,048,01,830,1806
,,
06
,
06+=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 59,678,1897,156,878,1806
,
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===
Tn tht in p trong cun dy ca cc my bin p l:
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===
in p thc trn thanh gp h p l:
kVUU hh 47,10115
11.48,109
115
11.
,
66===
D n mn hc li in 4
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Trng i hc bch khoa H Ni
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
Cc thng s:+ng dyZ01=42,42+j40,56
SB 601 10.36,162
=
+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+j7,52MVA
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Trng i hc bch khoa H Ni
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
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=13,28+j26,32; Z23=10,29+j9,84; B02/2=86,66.10-6S; 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
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Trng i hc bch khoa H Ni
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
+=+
++
Cng sut trc tng tr Zb3:MVAjjjSSS bb 01,807,2651,107,05,626333 +=+++=+=
Cng sut in dung cui v u on 2-3:
MVArB
UQQ dmcdcc 40,110.38,115.1102
.62232
2323 ====
Cng sut cui ng dy 2-3:MVAjjjjjQSSS ccktb 01,713,2640,14,006,001,807,262333
,,
23+=+++=+=
Tn tht cng sut trn on 2-3:
( ) ( ) 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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA B2
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 +=+++=+=
Cng sut in dung cui v u on 0-2:
MVArB
UQQ dmcdcc 05,110.66,86.1102
.62022
0202 ====
Cng sut cui ng dy 0-2:
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Trng i hc bch khoa H Ni
MVAj
jjjjjQSSSS ccktb
43,159,58
05,148,007,079,908,3221,675,26022223
,,
01
+=
+++++=++=
Tn tht cng sut trn on 0-2:
( ) ( ) MVAjjjXRU
SS
dm
06,807,432,2628,13110
43,1590,582
22
02022
2,,
02
02+=+
+=+=
Cng sut trc tng tr Z02:MVAjjjSSS 49,2397,6206,807,443,1590,5802
,,
02
,
02 +=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 44,2297,6205,149,2397,6202
,
0202+=+==
in p cc ntTn tht in p trn on 0-2:
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 ===
Tn tht in p trong cun dy ca cc my bin p B2 l:
kVU
XQRPU bbbbb 23,2
66,115
75,21.79,9935,0.08,32..
2
2222
2=
+=
+=
in p trn thanh gp h p ca trm 2 quy v pha in p cao l:kVUUU bh 75,10623,298,10822
,
2===
in p thc trn thanh gp h p ca trm 2 l:
kVUU hh 21,,10115
11.75,106
115
11.
,
22===
Tn tht in p trn on 2-3:
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 ===
Tn tht in p trong cun dy ca cc my bin p B3 l:
kVU
XQRPU bbbb 43,2
77,105
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
bh34,10343,277,105
33
,
3===
in p thc trn thanh gp h p ca trm 3 l:
kVUU hh 88,9115
11.43,103
115
11.
,
33===
3.Xt on 0-4
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Trng i hc bch khoa H Ni
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
==
+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
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
+=+=+=
Tn tht cng sut trong cun dy ca cc MBA
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
+=+
++
Cng sut trc tng tr Zb4:MVAjjjSSS bb 75,808,2875,108,0728444 +=+++=+=
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Trng i hc bch khoa H Ni
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
Cc thng s:+ng dyZ05=42,42+j40,56
SB 605 10.36,162
=
+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
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
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:
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Trng i hc bch khoa H NiMVAjjjSSS bb 53,909,3001,209,052,730555 +=+++=+=
Cng sut in dung cui v u on 0-5:
MVArB
UQQ dmcdcc 41,110.36,116.1102
.62052
0505 ====
Cng sut cui ng dy 0-1:MVAjjjjjQSSS ccktb 52,815,3041,14,006,053,909,300155
,,
05+=+++=+=
Tn tht cng sut trn on 0-5:
( ) ( ) MVAjjjXRU
SS
dm
29,344,356,4042,42110
52,815,302
22
05052
2,,
05
05+=+
+=+=
Cng sut trc tng tr Z05:MVAjjjSSS 81,1159,3329,344,352,815,3005
,,
05
,
05+=+++=+=
Cng sut nt ngun cung cp:MVAjjjjQSS cd 40,1059,3341,181,1183,3105
,
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 ===
Tn tht in p trong cun dy ca cc my bin p l:
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===
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Trng i hc bch khoa H Ni
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
==
+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
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 +=+=+=
Tn tht cng sut trong cun dy ca cc MBA
dm
n
dm
n
bS
SUj
S
SPS
.100.2
%.
2
. 26
2
6
6+
=
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Trng i hc bch khoa H Ni
=( ) ( )
MVAjj 51,107,025.100.2
5,626.5,10
25.2
5,626.12,022
2
22
+=+
++
Cng sut trc tng tr Zb6:MVAjjjSSS bb 01,807,2651,107,05,626666 +=+++=+=
Cng sut in dung cui v u on 0-6:
MVArB
UQQ dmcdcc 99.010.60,81.1102
. 620620606 ====
Cng sut cui ng dy 0-6:MVAjjjjjQSSS
ccktb42,713,2699,04,006,001,807,26
0666
,,
06+=+++=+=
Tn tht cng sut trn on 0-6:
( ) ( ) MVAjjjXRU
SS
dm
70,177,184,2710,29110
42,713,262
22
06062
2,,
06
06 +=++
=+=
Cng sut trc tng tr Z06:MVAjjjSSS 12,990,2770,177,142,713,2606
,,
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 ===
Tn tht in p trong cun dy ca cc my bin p l:
kVU
XQRPU bbbbb 29,2
19,112
95,27.01,827,1.07,26..
6
66666 =+=+=
in p trn thanh gp h p quy v pha in p cao l:kVUUU bh 90,10929,219,11266
,
6===
in p thc trn thanh gp h p l:
kVUU hh 51,10115
11.90,109
115
11.
,
66===
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Trng i hc bch khoa H Ni
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%
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Trng i hc bch khoa H Ni
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
in p thc trn thanh gp h p ca trm 1 l
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Trng i hc bch khoa H Ni
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
in p thc trn thanh gp h p ca trm 1 l
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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Trng i hc bch khoa H Ni
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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Trng i hc bch khoa H Ni
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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Trng i hc bch khoa H Ni
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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Trng i hc bch khoa H Ni
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