Thiet Ke Cung Cap Dien Cho Xi Nghiep Cong Nghiep

7/27/2019 Thiet Ke Cung Cap Dien Cho Xi Nghiep Cong Nghiep

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THIT K CUNG CP IN GVHD: NGUYN XUN PH

TI: THIT K CUNG CP IN CHO X NGHIP CNG NGHIP

Thit k cung cp in cho mt x nghip cng nghip gm vi cc d kin trongbng 2.1 btl ly theo vn anphabe ca h v tn ngi thit k. Ngun in c ly tim u in ca li 22KW c ta v cng sut ngn mch ti im u in ngvi dng c ch ci u tin ca tn m.

Bng: S liu thit k cung cp in cho mt x nghip

Alphabe

Ta X,Y; s lng my

cng tc v kch thc a*b caphn xng

S liu ti im u

in

Cng sut, h s s

dng v h s cos cacc my cng tcTa ( m) Sk

Ta (m)

N a*b Xn Yn

Sk

(MVA)

P

(kW) K sd CosX Y

1 2 3 4 5 6 7 8 9 10 11

A 200 24 6 18*20 327 210 165 10 0.37 0.8

110 75 5 16*30 368 137 210 4.5 0.67 0.73

148 28 7 12*20 437 69 160 3 0.75 0.75

B 167 87 6 15*24 26 427 200 5 0.63 0.76

C 58 94 8 16*20 480 56 240 4.5 0.56 0.8

D 36 120 9 20*34 510 43 165 6 0.65 0.82

24 176 8 14*22 316 58 210 3.6 0.72 0.67

E 10 53 7 16*28 23 421 200 4.2 0.49 0.68

180 84 5 12*20 468 137 210 7 0.8 0.75

G 6 69 9 14*28 59 287 150 10 0.43 0.74

H 8 108 10 13*26 541 318 240 2.8 0.54 0.69

SVTH: Trn Ngoc ThanhMSSV:TD06049 Page 1


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I 84 68 7 12*20 437 59 160 4.5 0.56 0.82

K 120 50 12 15*23 349 179 180 6.3 0.47 0.83

L 25 210 11 16*20 512 68 210 7.2 0.49 0.83

M 17 127 9 18*34 17 457 250 6 0.67 0.76

N 29 157 8 14*22 24 501 165 5.6 0.65 0.78

O 138 134 7 16*28 78 417 150 4.5 0.62 0.81

210 117 10 12*20 568 137 210 10 0.46 0.68

18 98 11 12*20 437 69 160 7.5 0.56 0.64

P 225 78 8 14*28 127 68 200 10 0.68 0.79

Q 113 93 9 16*26 435 93 160 2.8 0.87 0.84

R 210 17 5 12*20 368 137 210 5 0.83 0.77

S 89 26 7 16*28 18 618 240 7.5 0.38 0.69

T 75 54 6 16*20 35 479 250 6.3 0.45 0.7

U 63 73 8 18*34 473 321 160 8.5 0.55 0.81

252 8 8 14*28 65 431 250 4.5 0.56 0.76

V 48 106 5 14*22 457 57 180 6.5 0.62 0.73

X 186 19 9 16*28 89 421 200 10 0.41 0.65

Y 12 48 10 14*28 65 431 250 4 0.66 0.77

Thi gian s dng cng sut cc i l TM =5100h, ph ti loi I v loi II chin 75%. Githnh tn tht in nng C=1000/kwh, hiu sut thit hi do mt in gth=4500/kwh,

tn hao in p trong mng h p Up=5%. Cc thng s khc ly trong ph lc v s tay

thit k cung cp in.



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Bi lm:

- Gii m

H v tn: TRN NGC THANH

Gii m: TRN OGC UHI



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ng s liu thit k cung cp in cho cc phn xng theo h tn:rn Ngc Thanh

T PXTa My sX Y T.s 1 2 3 4 5 6 7 8 9 10 11

T 75 54

P,Kw 6.3 8.5 4.5 6.5 10 4ksd 0.45 0.55 0.56 0.62 0.41 0.66cos 0.70 0.81 0.76 0.73 0.65 0.77

R 210 17

P,Kw 5 7.5 6.3 8.5 4.5ksd 0.83 0.38 0.45 0.55 0.56cos 0.77 0.69 0.70 0.81 0.76

14828

P,Kw 3 5 4.5 6 3.6 4.2 7ksd 0.75 0.63 0.56 0.65 0.72 0.49 0.8

cos 0.75 0.76 0.8 0.82 0.67 0.68 0.75

N29 157

P,Kw 5.6 4.5 10 7.5 10 2.8 5 7.5ksd 0.65 0.62 0.46 0.56 0.68 0.87 0.83 0.38cos 0.78 0.81 0.68 0.64 0.79 0.84 0.77 0.69

O 138 134

P,Kw 4.5 10 7.5 10 2.8 5 7.5ksd 0.62 0.46 0.56 0.68 0.87 0.83 0.38cos 0.81 0.68 0.64 0.79 0.84 0.77 0.69

G 6 69

P,Kw 10 2.8 4.5 6.3 7.2 6 5.6 4.5 10ksd 0.43 0.54 0.56 0.47 0.49 0.67 0.65 0.62 0.46cos 0.74 0.69 0.82 0.83 0.83 0.76 0.78 0.81 0.68

210 117P,Kw 10 7.5 10 2.8 5 7.5 6.3 8.5 4.5 6.5ksd 0.46 0.56 0.68 0.87 0.83 0.38 0.45 0.55 0.56 0.62cos 0.68 0.64 0.79 0.84 0.77 0.69 0.70 0.81 0.76 0.73

C 58 94

P 4.5 6 3.6 4.2 7 10 2.8 4.5

ksd 0.56 0.65 0.72 0.49 0.8 0.43 0.54 0.56cos 0.8 0.82 0.67 0.68 0.75 0.74 0.69 0.82

U 63 73

P 8.5 4.5 6.5 10 4 10 4.5 3

ksd 0.55 0.56 0.62 0.41 0.66 0.37 0.67 0.75

cos 0.81 0.76 0.73 0.65 0.77 0.8 0.73 0.75

0 H 8 108

P 2.8 4.5 6.3 7.2 6 5.6 4.5 10 7.5 10

ksd 0.54 0.56 0.47 0.49 0.67 0.65 0.62 0.46 0.56 0.68cos 0.69 0.82 0.83 0.83 0.76 0.78 0.81 0.68 0.64 0.79

110 75

P,Kw 4.5 3 5 4.5 6ksd 0.67 0.75 0.63 0.56 0.65cos 0.73 0.75 0.76 0.8 0.82

2 18 98P,Kw 7.5 10 2.8 5 7.5 6.3 8.5 4.5 6.5 10 4ksd 0.56 0.68 0.87 0.83 0.38 0.45 0.55 0.56 0.62 0.41 0.6

cos 0.64 0.79 0.84 0.77 0.69 0.70 0.81 0.76 0.73 0.65 0.73 I 84 68 P 4.5 6.3 7.2 6 5.6 4.5 10


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I.1.1. Phn xng T

Danh sch cc thit b ca phn xng T

Din tch S = a b ca phn xng trn mt bng x nghip 1620 = 320

Ta ca phn xng trn mt bng x nghip X=75 Y=54

TT 1 2 3 4 5 6 Tng

P( kW) 6.3 8.5 4.5 6.5 10 4 39.8

Ksd 0.45 0.55 0.56 0.62 0.41 0.66

Cos 0.70 0.81 0.76 0.73 0.65 0.77

I.1.1.1. Ph ti ng lc

Xc nh h s s dng tng hp ca phn xng theo cng thc:

=

Do s lng thit b n = 6 > 4 nn ta xc nh s lng hiu dng theo cc iu kin:

- T l gia thit b ln nht v thit b nh nht:

-

M nhq* xc nh nh sau: nhq= nhq n

n1: L s thit b c cng sut khng nh hn cng sut ca thit b c cng sut lnnht

n : L tng s thit b trong phn xng



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P1 : L tng cng sut ca cc thit b c cng sut khng nh hn cng sut cathit b c cng sut ln nht

P2 : Tng cng sut ca n thit b c trong phn xng.

Tra bng 3-1 trang 36 sch Cung cp in (Nguyn Xun Ph ch bin) ng vi n * vP* , ta c c nhq*=0.86.

V vy:

-

-

-

Cng sut tnh ton ca ton phn xng:

H s cng sut trung bnh ca phn xng:

I.1.1.2. Ph ti chiu sng

Cng sut chiu sng ca phn xng c xc nh theo sut tiu th cng sut P0

I.1.1.3. Xc nh ph ti tnh ton ca ton b phn xng T

- Tng cng sut tc dng ca phn xng xc nh:



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- H s cng sut tng hp ca ton phn xng:

- Cng sut biu kin:

- Xc nh cng sut phn khng:

Vy :

I.1.2. Phn xng R

Danh sch thit b phn xng R

Din tch S = a b ca phn xng trn mt bng x

nghip 1220= 240

Ta ca phn xng trn mt bng x nghipX=210Y=17

TT 1 2 3 4 5 Tng

P( kW) 5 7.5 6.3 8.5 4.5 31.8

Ksd 0.83 0.38 0.45 0.55 0.56

Cos 0.77 0.69 0.70 0.81 0.76



=



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-



V vy:

-

-

-





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I.1.2.3. Xc nh ph ti tnh ton ca ton b phn xng R



- Cng sut biu kin:


Vy :

I.1.3. Phn xng

Danh sch thit b phn xng

Din tch S = a b ca phn xng trn mt bng x

nghip 12 20 = 240

Ta ca phn xng trn mt bng x nghip X=148



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Y=28

TT 1 2 3 4 5 6 7 Tng

P( kW) 3 5 4.5 6 3.6 4.2 7 33.3

Ksd 0.75

0.63

0.56

0.650.72

0.49 0.8

Cos 0.75

0.76

0.8 0.820.67

0.68 0.75





-



V vy:

-



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-

-





I.1.3.3. Xc nh ph ti tnh ton ca ton b phn xng



- Cng sut biu kin:




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Vy:

I.1.4. Phn xng N

Danh sch thit b phn xng N

Din tch S = a b ca phn xng trn mt bng x nghip 14 22=308

Ta ca phn xng trn mt bng x nghip

X=29

Y=157

TT 1 2 3 4 5 6 7 8 Tng

P( kW) 5.6 4.5 10 7.5 10 2.8 5 7.5 52.9

Ksd 0.65 0.62 0.46 0.56 0.68 0.87 0.83 0.38

Cos 0.78 0.81 0.68 0.64 0.79 0.84 0.77 0.69





-



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nhq* xc nh nh sau: nhq= nhq n

Tra bng 3-1 trang 36 sch Cung cp in (Nguyn Xun Ph ch bin) ng vi n * vP* ta c c nhq*=0.9.

V vy:

-

-

-

Cng sut tnh ton ton phn xng:




I.1.4.3. Xc nh ph ti tnh ton ca ton b phn xng N




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- Cng sut biu kin:


Vy :

I.1.5. Phn xng O

Din tch S = a b ca phn xng trn mt bng x nghip1628 = 448

Ta ca phn xng trn mt bng x nghip

X=138

Y=134

TT 1 2 3 4 5 6 7 Tng

P( kW) 4.5 10 7.5 10 2.8 5 7.5 47.3

Ksd 0.62 0.46 0.56 0.68 0.87 0.83 0.38

Cos 0.81 0.68 0.64 0.79 0.84 0.77 0.69



=



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-


Tra bng 3-1 trang 36 sch Cung cp in (Nguyn Xun Ph ch bin) ng vi n * v

P* , ta c c nhq*=0.82.

V vy:

-

-

-





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I.1.5.3. Xc nh ph ti tnh ton ca ton b phn xngO



- Cng sut biu kin:


Vy :

1.1.6 PHN X NG G

DANH SCH CC THIT B THUC PHN XNG G

Din tch S = a*b ca phn xng trn mt bng x nghip 14x28=392

Ta ca phn xng trn mt bng x nghip x=6 y=69



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TT 1 2 3 4 5 6 7 8 9 Tng

P(Kw) 10 2.8 4.5 6.3 7.2 6 5.6 4.5 10 56.9

ksd 0.43

0.54

0.56

0.47

0.49

0.67

0.65

0.62 0.46

cos 0.74

0.6

9

0.8

2

0.8

3

0.8

3

0.7

6

0.7

8

0.81 0.68

a. Ph ti ng lc


Do s lng thit b n = 9> 4 nn ta xc nh s lng hiu dng theo cc iu kin:

T l gia thit b ln nht v thit b nh nht:

M nhq* xc nh nh sau: nhq= nhq* n



P1 : L tng cng sut ca cc thit b c cng sut nh hn cng sut ca thit b c

cng sut ln nht



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Tra bng 3-1 trang 36 sch Cung cp in (Nguyn Xun Ph ch bin) ng vi n* v P*, ta c c nhq*=0.87.

Tra hnh 3-5 trang 32, da vo h s ksd v nhq ta tra c h s .

V vy:

-

-

-



b. Ph ti chiu sng




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c. Ph ti tnh ton ca ton b phn xng

Tng cng sut tc dng ca phn xng xc nh:

H s cng sut tng hp ca ton phn xng:

Cng sut biu kin:

Cng sut phn khng:

Vy :

Bn knh t l ca biu ph ti:

chn m=5 (KVA/mm2) . Ta c 1.92 mm

1.1.7 Phn xng




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1.1.7.4 Ph ti ng lc:


=



-



Din tch S = a b ca phn xng trn mt bng x nghip 1220=240

Ta ca phn xng trn mt bng x nghipX=210Y=117

TT 1 2 3 4 5 6 7 8 9 10 Tng

P( k

W)10 7.5 10 2.8 5 7.5 6.3 8.5 4.5 6.5 68.6

Ksd0.46 0.56

0.68

0.87

0.83

0.38

0.45

0.55 0.56 0.62

Cos0.68

0.640.79

0.84

0.77

0.69

0.70

0.81

0.76 0.73


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Tra bng 3-1 trang 36 sch Cung cp in (Nguyn Xun Ph ch bin) ng vi n * vP* , ta c c nhq*=0.90

V vy:

-

-

-



1.1.7.5 Ph ti chiu sang:


1.1.7.6Xc nh ph ti tnh ton ca ton b phn xng





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- Cng sut biu kin:


Vy :

1.1.8 PHN X NG C

DANH SCH CC THIT B THUC PHN XNG C



TT 1 2 3 4 5 6 7 8 Tng

P(Kw) 4.5 6 3.6 4.2 7 10 2.8 4.5 42.6

ksd 0.56 0.65 0.72 0.49 0.8 0.43 0.54 0.56

cos 0.8 0.82 0.67 0.68 0.75 0.74 0.69 0.82

a. Ph ti ng lc


=





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P1 : L tng cng sut ca cc thit b c cng sut nh hn cng sut ca thit b ccng sut ln nht




V vy:

-

-

-





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b. Ph ti chiu sng





Cng sut biu kin:

Cng sut phn khng:

Vy :




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1.1.9 PHN X NG U

DANH SCH CC THIT B THUC PHN XNG U



TT 1 2 3 4 5 6 7 8 Tng

P(Kw) 8.5 4.5 6.5 10 4 10 4.5 3 51

ksd 0.55 0.56 0.62 0.41 0.66 0.37 0.67 0.75

cos 0.81 0.76 0.73 0.65 0.77 0.8 0.73 0.75

a. Ph ti ng lc


=

Do s lng thit b n = 8> 4 nn ta xc nh s lng hiu dng theo cc iukin:





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V vy:

-

-

-





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b. Ph ti chiu sng





Cng sut biu kin:

Cng sut phn khng:

Vy :




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1.1.10 PHN X NG H

DANH SCH CC THIT B THUC PHN XNG H



TT 1 2 3 4 5 6 7 8 9 10 Tng

P(Kw)

2.8 4.5 6.3 7.2 6 5.6 4.5 10 7.5 10 64.4

ksd 0.54

0.5

6

0.4

7

0.4

9

0.6

7

0.6

5

0.6

2

0.46 0.56 0.68

cos 0.69

0.8

2

0.8

3

0.8

3

0.7

6

0.7

8

0.8

1

0.68 0.64 0.79

a. Ph ti ng lc







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V vy:

-

-

-





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b. Ph ti chiu sng





Cng sut biu kin:

Cng sut phn khng:

Vy :





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1.1.11 PHN X NG I

DANH SCH CC THIT B THUC PHN XNG I

Din tch S = a*b ca phn xng trn mt bng x

nghip

12x20=240


TT 1 2 3 4 5 6 7 Tng

P(Kw) 4.5 6.3 7.2 6 5.6 4.5 10 44.1

ksd 0.56 0.47 0.49 0.67 0.65 0.62 0.46

cos 0.82 0.83 0.83 0.76 0.78 0.81 0.68

a. Ph ti ng lc






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V vy:

-

-

-





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b. Ph ti chiu sng





Cng sut biu kin:

Cng sut phn khng:

Vy :



1.1.11 Phn xng




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Din tch S = a b ca phn xng trn mt bng x nghip

Ta ca phn xng trn mt bng x nghip X=110 Y=75

TT 1 2 3 4 5 TngP( kW) 4.5 3 5 4.5 6 23

Ksd 0.67 0.75 0.63 0.56 0.65

Cos 0.73 0.75 0.76 0.8 0.82

Ph ti ng lc


=



-

nhq* xc nh nh sau: nhq= nhq n

Tra bng 3-1 trang 36 sch Cung cp in (Nguyn Xun Ph ch bin) ng vi n * vP* , ta c c nhq*=0.94

V vy:

-



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-

-



Ph ti chiu sng


Xc nh ph ti tnh ton cho ton b phn xng



- Cng sut biu kin:




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Vy :

1.1.12 PHN X NG

DANH SCH CC THIT B THUC PHN XNG


Ta ca phn xng trn mt bng x nghip x=18

y=98

TT 1 2 3 4 5 6 7 8 9 10 11 Tng

P(Kw)

7.5 10 2.8 5 7.5 6.3 8.5 4.5 6.5 10 4 72.6

ksd 0.56

0.6

8

0.8

7

0.8

3

0.3

8

0.4

5

0.5

5

0.5

6

0.62 0.41 0.66

cos 0.64

0.7

9

0.8

4

0.7

7

0.6

9

0.7

0

0.8

1

0.7

6

0.73 0.65 0.77

a. Ph ti ng lc


=



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Do s lng thit b n = 11 > 4 nn ta xc nh s lng hiu dng theo cc iukin:





P1 : L tng cng sut ca cc thit b c cng sut nh hn cng sut ca thit b c

cng sut ln nht




V vy:

-

-

-




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b. Ph ti chiu sng





Cng sut biu kin:

Cng sut phn khng:

Vy :




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1.1.13 PHN X NG I

DANH SCH CC THIT B THUC PHN XNG I

Din tch S = a*b ca phn xng trn mt bng xnghip

12x20=240


TT 1 2 3 4 5 6 7 Tng

P(Kw) 4.5 6.3 7.2 6 5.6 4.5 10 44.1

ksd 0.56 0.47 0.49 0.67 0.65 0.62 0.46

cos 0.82 0.83 0.83 0.76 0.78 0.81 0.68

d. Ph ti ng lc







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V vy:

-

-

-





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e. Ph ti chiu sng


f. Ph ti tnh ton ca ton b phn xng



Cng sut biu kin:

Cng sut phn khng:

Vy :




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I.1 XC NH PH TI TNH TON CA TON X NGHIP

- H s s dng tng hp ca x nghip xc nh tng t theo biu thc

- H s nhu cu ca x nghip

- H s cng sut ca ton x nghip

- Tng cng sut tnh ton ca x nghip

Vy:



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Kt qu tnh ton ph ti cc phn xng:

II Xc nh s ni in

2.1 V tr t trm bin p

48*75 39.26*210 42.44*148 60.29*29 56.86*138 61.4*6 71.53*210 51*58 58.46*63 65.5*8 31.16*110 75.51*18 40.75*84

83.25702.46

X+ + + + + + + + + + + +

= =


N M kncPl,

Kw

Q

kVar

Pcs

Kw

S

kVA

r

T 0.52 6 0.82 39.8 32.64 0.76 31 3.84 36.48 48 1.75

R 0.53 5 0.86 31.8 27.35 0.77 25.1 2.88 30.23 39.26 1.58

0.60 7 0.84 33.3 29.97 0.77 26.61 2.8832.85

242.44 1.64

N 0.59 80.796

552.9 42.13 0.76 38.95

3.69

6

45.82

660.29 1.96

O 0.58 7 0.8 47.3 37.84 0.76 36.3

5.37

6

43.21

6 56.86 1.90

G 0.52 90.759

256.9 43.19 0.78 38.63

4.70

4

47.89

461.40 1.98

0.57 100.729

668.6 50.05 0.74 47.11 2.88 52.93 71.53 2.13

C 0.59 8 83 42.6 35.36 0.77 32.14 3.84 39.2 51 1.8U 53 8 75 51 38.25 0.79 35.57 7.34 45.6 58.46 1.93H 57 10 73 64.4 47 0.78 41,36 4.06 51.06 65.5 2.04

0.645 5 0.9675

23 22.25 0.82 19.61 5.76 28.01 31.16 1.41

0.57 11 73 72.6 53 0.74 50.85 2.88 55.88 75.51 2.19I 55 7 74 44.1 32.6 0.8 24.78 2.88 35.48 40.75 1.6 702.46


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48*54 39.26*17 42.44*28 60.29*157 56.86*134 61.4*69 71.53*117 51*94 58.46*73 65.5*108 31.16*75 75.51*98 40.75*68

89.37702.46

Y+ + + + + + + + + + + +

= =

2.2 Chn dy dn t ngun n binp

Theo bi ta chn im ngun: C(480,56)

- Chiu di on dy xc nh theo biu thc:

Tit din dy dn cao p c th chn theo mt dng in kinh t. Cn c vos liu ban u vi dy ng theo bng ta tm c J kt = 2 A/mm2



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Tit din dy dn cn thit

i vi ng dy cao p tit din ti thiu khng nh hn 35 mm 2 do ta chn

dy dn AC-35 ni t ngun vo trm bin p.

2.3 S ni dy t trm bin p n cc phn xng:

m bo an ton v m quan trong x nghip cc tuyn dy s c xy dng

bng ng cp. C th so snh 3 phng php ni dy nh sau:



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Phng n 1 :T trm bin p ko dy trc tip n cc phn xng theo ng thng,

cc t phn phi s c t ngay ti u cc nh xng cung cp in cho cc thit

b trong xng. Phng n ny c tng chiu di hnh hc nh nht, nhng khng thun

tin cho vic thi cng, vn hnh v pht trin mng in, nn khng c tnh kh thi. V

vy ta loi b ngay phng n ny.



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Phng n 2: Cng ko dy trc tip t trm bin p n cc phn xng, nhng theo

ng b gc, cc ng cp s c xy dng dc theo cc mp ng v nh xng,

nh vy s thun tin cho vic xy dng, vn hnh v pht trin mng in, tuy nhin

chiu di ca cc tuyn dy s tng hn so vi phng n 1

Phng n 3: T trm bin p ta xy dng cc ng trc chnh, cc phn xng gncc ng trc s c cung cp in t ng trc ny qua cc t phn phi trung gian.Tuy nhin do cc khong cch khng ln v vic t cc t phn phi trung gian cngi hi chi ph nht nh, nn trong phng n ny ta ch cn t 2 t phn phi ti im1 v im 2. T 1 phn phi in cho 4 phn xng H,N,,G. T 2 phn phi in cho 3

phn xng: ,,R. Cc phn xng cn li ly in t trm bin p, nhng tuyn idy vn b gc theo ng trc



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Phng n ny s gim c s lng tuyn dy v tng chiu di dy dn, nhng tit

din dy ca cc ng trc chnh s ln hn. Nh vy chng ta ch tnh ton so snh

gia 2 phng n 2 v 3.

- Ta im 1 :

-

-

- Ta im 2 :

Do ly cc ta cc im 1 v 2 c tung trng vi tung ca trm bin p

nn ta cc im 1 v 2 cn ly l :

im 1 :(14.85 ; 89.37)

im 2 : (189.18 ; 89.37)



49/171


2.3.2 S B XC NH TIT DIN DY DN

Khi la chn phng n c th la chn tit din dy theo phng php n

gin nht theo dng in t nng cho php, nhng sau khi xc nh c phng n

ti u th tit din dy dn phi c kim tra li theo hao tn in p cho php, v i

vi mng in h p, cht lng in phi c t ln hang u. Ta tin hnh chn tit

din dy dn theo phng php hao tn in p cho php, ly gi tr hao tn in p cho

php l (i vi cp in p 380V v ). D nh s t trong



50/171


c rnh, xy dng di mt t, do vy c th s b chn gi tr in tr khng 0.07

.

2.3.2.1 Phng n 2

2.3.1.1 phn xng T

Phn

xng

X Y

T 75 54 36.48 31

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng T

- Thnh phn phn khng ca hao tn in p

Ta c:

- Thnh phn tc dng ca hao tn in p

- Tit din dy dn

Vi : F : tit din phn dn in ca dy dn (mm2)

P : cng sut tc dng ti im T (kW)



51/171


: chiu di ng dy t trm bin p n phn xng T (m)

: in dn sut ( )

: thnh phn tc dng ca hao tn in p (V)

ta chn loi cp ABBG c tit din chun l Fch = 6 mm2 c r0 =3.33 v x0 =

0.09 .

- Hao tn in p thc t

2.3.1.2 phn xng R

Phn xng X Y

R 210 17 30.23 25.1

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng R


Ta c:



52/171



- Tit din dy dn


P : cng sut tc dng ti im R (kW)

: chiu di ng dy t trm bin p n phn xng R (m)

: in dn sut ( )



0.07 .

- Hao tn in p thc t

2.3.1.3phn xng

Phn xng X Y

148 28 32.85 26.61

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng




53/171


Ta c:


- Tit din dy dn


P : cng sut tc dng ti im (kW)

: chiu di ng dy t trm bin p n phn xng (m)

: in dn sut ( )


ta chn loi cp ABBG c tit din chun l Fch = 16 mm2

c r0 =1.25 v x0

= 0.07 .

- Hao tn in p thc t



54/171


2.3.1.4 Phn xng N

Phn xng X Y

N 29 157 42.13 39.95TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng N


Ta c:


- Tit din dy dn


P : cng sut tc dng ti im N (kW)

: chiu di ng dy t trm bin p n phn xng N(m)

: in dn sut ( )




55/171


ta chn loi cp ABBG c tit din chun l Fch = 16 mm2 c r0 =1.25 v x0

= 0.07 .

- Hao tn in p thc t

2.3.1.5 Phn xng O

Phn xng X YO 138 134 43.21 36.3

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng O


Ta c:


- Tit din dy dn




56/171


P : cng sut tc dng ti im O (kW)

: chiu di ng dy t trm bin p n phn xng O(m)

: in dn sut ( )



= 0.07 .

- Hao tn in p thc t

2.3.1.6 Phn xng G

Phn xng X Y

G 6 69 47.89 38.63

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng G


Ta c:



57/171



- Tit din dy dn


P : cng sut tc dng ti im G (kW)

: chiu di ng dy t trm bin p n phn xng G(m)

: in dn sut ( )



= 0.07 .

- Hao tn in p thc t

2.3.1.7 Phn xng

Phn xng X Y

210 117 52.93 47.11

TBA 83.25 89.27




58/171



Ta c:


- Tit din dy dn




: in dn sut ( )



0.07 .

- Hao tn in p thc t



59/171


2.3.1.8 Phn xng C

Phn xng X Y

C 58 94 39.2 32.14TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng C


Ta c:


- Tit din dy dn


P : cng sut tc dng ti im C (kW)

: chiu di ng dy t trm bin p n phn xng C(m)

: in dn sut ( )




60/171


ta chn loi cp ABBG c tit din chun l F ch = 4 mm2 c r0 =5 v x0 =

0.09 .

- Hao tn in p thc t

2.3.1.9Phn xng U

Phn xng X YU 63 73 45.6 35.57

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng U


Ta c:




61/171


- Tit din dy dn


P : cng sut tc dng ti im U (kW)

: chiu di ng dy t trm bin p n phn xng U(m)

: in dn sut ( )



0.09 .

- Hao tn in p thc t

2.3.1.10 Phn xng H

Phn xng X Y

H 8 108 51.06 41.36

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng H




62/171


Ta c:


- Tit din dy dn


P : cng sut tc dng ti im H (kW)

: chiu di ng dy t trm bin p n phn xng H(m)

: in dn sut ( )


ta chn loi cp ABBG c tit din chun l Fch = 16 mm2

c r0 =1.25 v x0

= 0.07 .

- Hao tn in p thc t



63/171


2.3.1.11 Phn xng

Phn xng X Y

110 75 28.01 19.61TBA 83.25 89.27



Ta c:


- Tit din dy dn




: in dn sut ( )




64/171


ta chn loi cp ABBG c tit din chun l F ch = 4 mm2 c r0 =5 v x0 =

0.09 .

- Hao tn in p thc t

2.3.1.12 Phn xng

Phn xng X Y

18 98 55.88 50.85

TBA 83.25 89.27



Ta c:


- Tit din dy dn




65/171




: in dn sut ( )



= 0.07 .

- Hao tn in p thc t

2.3.1.13 Phn xng I

Phn xng X Y

I 84 68 35.48 24.78

TBA 83.25 89.27

- Chiu di ng dy t trm bin p n phn xng I


Ta c:



66/171



- Tit din dy dn


P : cng sut tc dng ti im I (kW)

: chiu di ng dy t trm bin p n phn xng I(m)

: in dn sut ( )


ta chn loi cp ABBG c tit din chun l F ch = 2.5 mm2 c r0 =8 v x0 =

0.09 .

- Hao tn in p thc t

Bng kt qu

N

Q

kVa

rKw

l0i

m

U X

V

U R

V

F

mm2Fch

mm2r0

/ km

x0

/ km

U

V

OT 30 36.48

43.52

0.2 18.8 4.19 6 1.25 0.09 14.23

OR 25.1

30.23

199.02

1.1 17.9 16.6 25 0.8 0.07 16.42

O 26. 32.8 126. 0.6 18.4 11.1 16 1.25 0.07 14.2



67/171


61 5 03ON 39.

9542.13

115.52

0.8 18.2 13.27

16 1.25 0.07 10.01

OO 36.3

43.21

99.48

0.6 18.4 11.5 16 1.25 0.07 14.8

OG 38.63

47.89

97.52

0.6 18.4 12.6 16 1.25 0.07 16

O 47.11

52.93

154.48

1.3 17.7 22.7 25 0.8 0.07 18

OC 32.14

39.2 30 0.1 18.9 3 4 5 0.09 15

OU 35.57

45.6 36.52

0.2 18.8 4.3 6 3.33 0.09 15

OH 41.36 51.06 93.98 0.7 18.3 13 16 1.25 0.07 16

O 19.61

28.01

41 0.1 18.9 3 4 5 0.09 15

O 50.85

55.88

73.98

0.7 18.3 11.2 16 1.25 0.07 14

OI 24.78

35.48

22 0.1 18.9 2 2.5 8 0.09 16

Bng kt qu tnh ton theo phng n 2

2.3.2.2. Phng n 3:

A: on 01:

Phn xng X Y P, Kw Q , kVAr H 8 108 51.06 41.36

N 29 157 42.31 39.95 18 98 55.88 50.85G 6 69 47.89 38.63

Dng cng sut chy trn on O1 c xc nh bng tng cng sut ca 6 phn

xng : H,N,,G

- Cng sut tc dng trn on 01 :

=51.06 + 42.31 + 55.88 + 47.89 =

198.14 (KW)

- Cng sut phn khng trn on 01 :



68/171


- 38.63 =

170.79(Kvar)

- Chiu di on 01 :

Ta im 1 : (14.85 ; 89.37)

- Chiu di on 1H :

- Chiu di on 1N :

- Chiu di on 1 :

- Chiu di on 1G :

- Hao tn in p cho php t trm bin p n im ti xa nht vn l 19V. Thnhphn phn khng ca hao tn in p t trm bin p n phn xng H

- Thnh phn phn khng ca tn hao in p :

- Ta c :



69/171


- Thnh phn tc dng ca tn hao in p cho php trn on 01

Ta c :

M

- Tit din dy dn



70/171


- Vi : F : tit din phn dn in ca dy dn (mm2)

P01 : cng sut tc dng trn on 01 (kW)

l01 : chiu di ng dy t trm bin p n 1 (m)

: in dn sut ( 2/m mm )

01RU : thnhphn tc dng ca hao tn in p (V)

ta chn loi cp ABBG c tit din chun l Fch = 70 mm2 c r0 = 0.29

v x0 = 0.06 / km .

- Hao tn in p tc dng thc t trn on 01 :

- Thnh phn tc dng ca hao tn in p cho php t t phn phi 1 n cc phnxng H,N,,G l nh nhau v bng:

- Hao tn in p thc t trn on 01:

a.Phn xng H:

- Thnh phn phn khng ca tn hao in p:

Ta c:

- Tit din dy dn on 1H:



71/171



v x0 = 0.07 / km .

- Hao tn in p thc t on 1H:

b.Phn xng N:

Thnh phn phn khng ca tn hao in p:

Ta c:

- Tit din dy dn on 1N:


v x0 = 0.06 / km .

- Hao tn in p thc t on 1N:

c.Phn xng :




72/171


73/171


B.on 02

- Cng sut tc dng trn on 02:

- Cng sut phn khng trn on 02 :

- Chiu di on 02 :

Ta im 2 : (189.18 ; 89.37)

- Chiu di on 2 :

- Chiu di on 2 :

- Chiu di on 2R :

+ Hao tn in p cho php t trm bin p n im ti xa nht vn l 19V.

Thnh phn phn khng ca hao tn in p t trm bin p n phn xng R



74/171


+) Thnh phn phn khng ca tn hao in p :

Ta c :

+) Thnh phn tc dng ca tn hao in p cho php trn on 02

Ta c :

M



75/171


+) Tit din dy dn


P02 : cng sut tc dng trn on 02 (kW)

l02 : chiu di ng dy t trm bin p n 2 (m)



ta chn loi cp ABBG c tit din chun l Fch = 70 mm2 c r0 = 0.29 v x0 =

0.06 / km .

+) Hao tn in p tc dng thc t trn on 02:

+)Thnh phn tc dng ca hao tn in p cho php t t phn phi 2 n ccphn xng v R l nh nhau v bng:

+) Hao tn in p thc t trn on 02:



76/171


a. Phn xng


Ta c:

- Tit din dy dn on 2:

ta chn loi cp ABBG c tit din chun l Fch = 25 mm2 c r0 = 0.8v x0 =

0.07 / km .

- Hao tn in p thc t on 2:

b. Phn xng :- Thnh phn phn khng ca tn hao in p:

Ta c:



77/171


- Tit din dy dn on 2:


0.07 / km .

- Hao tn in p thc t on 2:

c. Phn xng R

- Thnh phn phn khng ca tn hao in p:

Ta c:

- Tit din dy dn on 2R:


0.07 / km .

- Hao tn in p thc t on 2R:



78/171


I.1.5.3.1. Cc phn xng cn li

Cc phn xng cn li l T, O, C, U, v I . Ba phn xng ny ly in trc tip ttrm bin p nhng tuyn i dy vn b gc theo ng trc.

a. Phn xng T

(Bng 2.15)

- Chiu di ng dy t trm bin p n phn xng T



Phn xng X Y , kW Q, kVAr

T 75 54 36.48 31

TBA 83.25 89.37


79/171


- Thnh phn tc dng ca tn hao in p

- Tit din dy dn :


P : cng sut tc dng ti im T (kW)

l : chiu di ng dy t trm bin p n phn xng T (m)


: Thnh phn tc dng ca tn hao in p.

Ta chn loi cp ABBG c tit din chun l Fch= 6 mm2 c r0 = 3.33 v x0 = 0.09

/ km . (Tra bng 2-36 trang 645 sch cung cp in Nguyn Xun Ph)

- Tn hao in p thc t:

b. Phn xng



80/171


(Bng 2.16)




- Tit din dy dn :



110 75 28.01 19.61TBA 83.25 89.37


81/171




l : chiu di ng dy t trm bin p n phn xng (m)



Ta chn loi cp ABBG c tit din chun l Fch= 4 mm2 c r0 = 5 v x0 = 0.09



c. Phn xng O

(Bng 2.16)

- Chiu di ng dy t trm bin p n phn xng O



138 134 43.2 36.3

TBA 83.25 89.37


82/171




- Tit din dy dn :


P : cng sut tc dng ti im O (kW)

l : chiu di ng dy t trm bin p n phn xng O (m)



Ta chn loi cp ABBG c tit din chun l Fch= 10 mm2 c r0 = 2 v x0 = 0.07





83/171


d. Phn xng U

(Bng 2.16)

- Chiu di ng dy t trm bin p n phn xng U





U 63 73 45.6 35.57

TBA 83.25 89.37


84/171


- Tit din dy dn :


P : cng sut tc dng ti im U (kW)

l : chiu di ng dy t trm bin p n phn xng U (m)

: in dn sut (2

/m mm )


Ta chn loi cp ABBG c tit din chun l Fch=6 mm2 c r0 = 3.33 v x0 = 0.09



e. Phn xng C



C 58 94 39.2 32.14

TBA 83.25 89.37


85/171


(Bng 2.16)




- Tit din dy dn :


P : cng sut tc dng ti im C (kW)

l : chiu di ng dy t trm bin p n phn xng C (m)





86/171


Ta chn loi cp ABBG c tit din chun l Fch=4 mm2 c r0 = 5 v x0 = 0.09



f. Phn xng I

(Bng 2.16)

- Chiu di ng dy t trm bin p n phn xng I



I 84 68 35.84 24.78

TBA 83.25 89.37


87/171




- Tit din dy dn :


P : cng sut tc dng ti im I (kW)

l : chiu di ng dy t trm bin p n phn xng I (m)



Ta chn loi cp ABBG c tit din chun l Fch=2.5 mm2

c r0 = 8v x0 = 0.09/ km . (Tra bng 2-36 trang 645 sch cung cp in Nguyn Xun Ph)


Bng kt qu tnh ton theo phng n 3 :



88/171


N Q,kVAr L0-i,m, V

,

VF,mm2

Fch,mm2

r0, x0,

01 170.7

9

189.1

4

75.2

5

2.5 16.5 58.3

3

70 0.2

9

0.0

6

13.4

02 98.82 116.01

105.93

2.36

16.64

56.81

70 0.29

0.06

11.01

1N 34.95 41.19 81.78

59 70 0.29

0.06

3.02

1 59.85 55.88 11.78

11.54

16 1.25

0.07

2.27

1H 41.36 51.06 25.48

22.82

25 0.8 0.07

2.93

1G 38.63 47.89 29.22

24.55

25 0.8 0.07

3.15

2 47.11 52.93 48.09

17.34

25 0.8 0.07

5.87

2 26.61 32.85 101.4

22.75

25 0.5 0.07

7.51

2R 25.1 30.23 93.55

19.3 25 0.8 0.07

6.38

0T 31 36.48 43.63

0.24

18.76

4.21 6 3.33

0.09

1

0 19.61 28.01 41.12 0.14 18.86 3.03 4 5 0.09 10.280O 36.3 43.2 99.3

80.06

18.34

9.2 10 2 0.07

15.6

0U 35.57 45.6 36.98

0.24

18.76

4.46 6 3.33

0.09

15

0C 32.14 39.2 29.52

0.17

18.83

3.05 4 5 0.09

15.4

0I 24.78 35.84 22.12

0.1 18.9 2.08 2.5 8 0.09

16.6

(Bng 2.17)



89/171


I.1.6. So snh kinh t cc phng n

Nh phn tch, phng n 1 khng c tnh kh thi i vi mt x nghip cngnghip nn chng ta ch tin hnh tnh ton so snh cc ch tiu kinh t ca phng n 2v phng n 3. Cc phng n c so snh theo ch tiu chi ph quy i:

Coi thi gian thu hi vn u t tiu chun l 8 nm. H s khu hao ng cp l 6%,tc kkh=0.06, khi p=1/8 + 0.06 = 0.185; gi thnh tn tht

Tn tht in nng trn on dy c xc nh theo biu thc:

Trong : l tn tht cng sut ln nht trn ng dy vi ph ti tnh ton

- Thi gian chu tn tht cng sut ln nht

Thi gian chu tn hao cng sut cc i c th c xc nh theo biu thc:

I.1.6.1. Phng n 2

I.1.6.1.1. Tnh cho on OT- Hao tn cng sut tc dng trn dy dn

- Hao tn cng sut phn khng trn dy dn



90/171


- Tn tht in nng trn dy dn

-

- Vn u t ng cp, vn u t tra theo phc lc gi cp h p. Ta c cchquy i gi cp nh sau:

Gi cp Cu = 1.3 ln gi cp Al

Gi cp loi b hn AC-25 th tin t l vi tit din

Gi mt s loi cp Al c th nh:

AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy OT c tit din 10 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.2. Tnh cho on OR

- Hao tn cng sut tc dng trn dy dn





91/171


-

- Vn u t ng cp, vn u t tra theo phc lc gi cp h p. Ta c cch

quy i gi cp nh sau:




AC-50: 89 (Tr)

AC-35: 81.3 (Tr) AC-25: 70 (Tr)

T ta tnh c i vi dy OR c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.3. Tnh cho on O






92/171


-





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy O c tit din 25mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.4. Tnh cho on ON




-



93/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy ON c tit din 16 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.5. Tnh cho on OO




-



94/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy OO c tit din 16 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.6. Tnh cho on OG




-



95/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy OG c tit din 16 mm 2 c ng/km

-

- Chi ph quy i:





-




96/171





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy O c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.8. Tnh cho on OC




-






97/171



AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy OC c tit din 4 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.9. Tnh cho on OU




-





AC-50: 89 (Tr)



98/171


AC-35: 81.3 (Tr)

AC-25: 70 (Tr)


-

- Chi ph quy i:

I.1.6.1.10.Tnh cho on OH




-





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)



99/171


T ta tnh c i vi dy OH c tit din 16 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.1.11.Tnh ton cho on O




-





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)




100/171


-

- Chi ph quy i:

I.1.6.1.12.Tnh cho on O




-





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)


-



101/171


- Chi ph quy i:

I.1.6.1.13.Tnh cho on OI




-





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)



102/171


T ta tnh c i vi dy OI c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

Bng tng kt phng n 2:

NQ,kVar kW

L0i,m

Fch,mm2

v0,106

,

kVAr

,kW

V,106

pV,106

C,106

Z,106

O

T31 36.48 43.52 6

21.4

8

0.33 1.3

8

4858.9

8

0.7

4

0.1

3

4.8 4.93

OR

25.1 30.23199.0

225

91 0.07 0.38

1337.98

8.5 1.57

1.3 2.04

O

26.61

32.852

126.03

1691 0.08 1 309.32 9.2

21.7 0.39 2.09

ON

38.95

45.826

115.52

1658.24

0.25 3.6 12675.6

6.7 1.23

12.67 13.9

OO

36.3 43.2 99.48 1658.24

0.19 2.74

9697.54

5.79

1.07

9.64 10.71

O

G

38.3

6 47.98 97.52 16

58.2

4

0.22 3.2

7

11513.

67

5.6

7

1.0

4

13.51 12.5

7



103/171


O

47.11

52.93154.4

825

91 0.3 4.29

15067.88

14.5

2.59

15.06 17.65

OC

32.14

39.2 30 414.56

0.24 2.66

9365.86

0.34

0.06

9.36 9.43

OU

35.57

45.6 36.52 6 21.48

0.25 2.81

9894.07

0.79

0.14

9.89 10.03

OH

41.36

51.06 93.98 1658.24

0.24 3.5 12323.5

5.48

1.01

12.32 12.23

O

19.61

28.01 41 458.24

0.19 1.65

5809.65

2.38

0.44

5.8 6.29

O

50.85

55.88 73.98 1658.24

0.25 3.65

12534.67

4.3 0.79

12.53 13.32

OI24.7

8

35.48 22 2.591 0.2 2.2

8

8027.8

8

2 0.3

7

8.02 8.39

2.8133.2

11346.6

66.41

11.14

115.29

123.58

I.1.6.2. Phng n 3

I.1.6.2.1. Tnh cho on O1




-



104/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy O1 c tit din 70 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.2. Tnh cho on O2




-



105/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy O2 c tit din 70 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.3. Tnh cho on 1H




-



106/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 1H c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.4. Tnh cho on 1G




-



107/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 1G c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.5. Tnh cho on 1




-



108/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 1 c tit din 4 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.6. Tnh cho on 1N




-



109/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 1N c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.7. Tnh cho on OO- Hao tn cng sut tc dng trn dy dn




110/171



-





AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 0O c tit din 10 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.8. Tnh cho on OT






111/171


-





AC-50: 89 (Tr) AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 0T c tit din 10 mm 2 c ng/km

-

- Chi ph quy i:





-



112/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)


-

- Chi ph quy i:

I.1.6.2.10.Tnh cho on OU




-



113/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 0U c tit din 6 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.11.Tnh cho on OC




-



114/171






AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 0C c tit din 5 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.12.Tnh cho on OI- Hao tn cng sut tc dng trn dy dn



-





115/171




AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 0C c tit din 8 mm 2 c ng/km

-

- Chi ph quy i:

I.1.6.2.13.Tnh cho on 2




-






116/171



AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)


-

- Chi ph quy i:

I.1.6.2.14.Tnh cho on 2




-







117/171


AC-50: 89 (Tr)

AC-35: 81.3 (Tr)

AC-25: 70 (Tr)


-

- Chi ph quy i:

I.1.6.2.15.Tnh cho on 2R




-





AC-50: 89 (Tr)



118/171


AC-35: 81.3 (Tr)

AC-25: 70 (Tr)

T ta tnh c i vi dy 2R c tit din 25 mm 2 c ng/km

-

- Chi ph quy i:

aBng kt qu tnh ton kinh t phng n 3:

nQ,

kVar kWL0i,m

Fch,mm2

v0,106

,kVAr

,

kW

V,106

pV,106

C,106

Z,106

01170.79

189.41

75.25 70 1500.58

9.81

34541.01

11.28 2.08

34.54

36.62

0298.8

2116.01

105.93

70 1500.29

4.94

17393.74

15.88 2.93

17.39

20.32

1G 38.63

47.894

29.22 25 91 0.04

0.61

2147.81

2.65 0.49

2.14 2.63

148.1

6

54.1

111.78 16

14.56

0.03

1.82

6408.22

0.15 0.02

6.41 6.44

1N38.9

5

45.8

2659.35 25 91

0.104

1.19

4189.99

5.40.99

4.18 4.28

0O 36.3 43.2 99.38 1058.2

40.3

4.38

15421.89

5.78 1.06

15.42

16.48

0T 31 36.48 43.63 6 36.4 0.07 2.02 7077.21 2.31 0.42 7.07 7.49



119/171


019.6

128.0

156.36 6

21.84

0.04

1.52

5351.92

1.23 0.23

5.35 5.58

0U35.5

7

45.6 36.98 621.4

8

0.2

5

2.8

5

10034

.85

0.8

0.14

10.0

3

10.1

70C

32.1

439.2 29.52 4

21.48

0.23

2.62

9225.02

0.64 0.11

9.22 9.33

0I24.7

8

35.8

422.12 2.5

41.36

0.22.32

8186.72

1.28 0.23

8.16 8.39

226.6

1

32.8

52

107.75

25 910.09

1.07

3767.47

9.81.8

3.765.57

3

247.1

1

52.9

343.25 16

58.2

4

0.1

1

1.8

8

6619.

48

2.5

2 0.466.62 7.08

2R 25.130.2

3

123.17

25 910.09

1.05

3697.05

11.21 2.07

3.69 5.76

2.424

38.08

134062.4

70.93

13.03

133.98

146.43

So snh phng n 2 v phng n 3 v ch tiu kinh t:

Phng n Vn u t 106 VN Chi ph hng nm 106 VN/nm

V pV C Z2 66.61 12.35 106.701 119.053 66.41 11.14 115.29 123.58

T bng trn ta thy cc thng s v vn u t v chi ph hng nm th phng n 2u c gi tr thp hn phng n 3. V vy ta phng n 2 l phng n ti u nht mta cn la chn.

I.2. Chn cng sut v s lng my bin p

T kt qu tnh ton hao tn cng sut , (kt qu ca bng thng k

phng n 2 v ch tiu kinh t) ta c tng cng sut tnh ton c k n hao tn cngsut trn ng dy:

Hay



120/171


Cng sut trung bnh:

H s in kn th ph ti:

H s in k cu my bin p < 0.93 th cho php qu ti trong 5 ngy, mi ngy c 6gi lm vic, qu ti c 40%.

Nh vy, my bin p c th lm vic qu ti 40% trong mt thi gian xc nh.Ta cth xy dng trm bin p theo 3 phng n:

Phng n 1: Dng 1 my bin p 220/0.4 kV c cng sut nh mc l 400 kVA.Theo phng n ny th h s qu ti ca my bin p l:

Phng n 2: Dng mt my bin p 220/0.4 kV c cng sut nh mc l 500 kVA.

Phng n 3: Dng hai my bin p c cng sut 2 x 200 kVA

Kim tra kh nng lm vic qu ti ca my bin p ch s c: Khi c s c mt

trong hai my bin p th my bin p cn li s gnh ton b ph ti loi I v loi IIbng:

H s qu ti khi mt trong hai bin p phng n 3 b s c:

Nh vy my bin p khng th m bo lm vic khi qu ti xy ra, v vy m boan ton cho nh my khi c s c xy ra mt trong hai my, ngoi 25% ph ti loi III,cn phi ct thm 15% ph ti loi II, khi ph ti ch s c s l :

H s qu ti ca my bin p lc ny l:



121/171


Cn c vo bng bo gi my bin p do cng ty TNHH Sn xut v Thng mi W.I.Nphn phi (xem chi tit ti website: http://www.mayhanviet.com/loai-sp-vn/may-bien-ap.html)ta c gi cc loi my bin p nh sau:

Cng sut nhmc, kVA

Hao tn cng sut, kW in p nm Vn u tUk VBA, 106 VN

400 0.84 5.75 4 178.2500 1 7 4 204.6

2x200 0.53 3.45 4 215

So snh hai phng n theo ch tiu chi ph quy i:

Gi tr C xc nh tng t nh phn trn:

Khi so snh thit hi do mt in, ta ch cn xt n ph ti loi I v loi II m thi, v cth coi ph ti loi III cc phng n l nh nhau.

Phng n I:

Tn tht trong my bin p xc nh theo biu thc:

Chi ph tn tht:

Cng sut thiu ht khi mt in bng cng sut loi I v loi II l:

in nng thiu ht:

Thit hi do mt in:

Tng chi ph quy i ca phng n:



122/171


Phng n II:

Tn tht trong my bin p xc nh theo biu thc:

Chi ph tn tht:

Cng sut thiu ht khi mt in bng cng sut loi I v II l:

in nng thiu ht:

Thit hi do mt in:

Tng chi ph quy i ca phng n:

Phng n III:

Tn tht trong cc my bin p:

Chi ph tn tht:

Cng sut thiu ht khi mt in bng 15% cng sut loi II l:



123/171


Tng hp cc kt qu tnh ton cho 3 phng n:

Phng n V,106

VNChi ph hng nm, 106 VN/nm

pV C Y Z1 178.2 69725 32.967 96.71 42.60 172.22 204.6 57344 37.815 57.34 43.42 138.613 215 24257 39.775 21.25 9.49 70.51

T bng trn ta thy phng n 3 c tng chi ph nh nht. Nh vy ta chn phngn 3 thc hin, phng n ny gm hai my bin p 2 x 200 kVA

II. Tnh ton in

II.1. Hao tn in p ln nht trong mng in

II.1.1. Trn ng dy

Nh tnh ton trn hao tn in p ln nht ca mng in s c xy dng l

hao tn trn ng dy OI vi (Bng 2.12)

II.1.2. Trong my bin p

p dng cng thc 6.9 trang 110 sch Cung cp in Nguyn Xun Ph (ch bin)ta c:

Khi hai my lm vic song song th:



124/171


II.2. Hao tn cng sut (tnh theo phng n 2)

II.2.1. Trn ng dy

II.2.1.1. Tnh cho on OT

Hao tn cng sut tc dng trn dy dn

Hao tn cng sut phn khng trn dy dn

II.2.1.2. Tnh cho on OR



II.2.1.3. Tnh cho on O



II.2.1.4. Tnh cho on ON




125/171



II.2.1.5. Tnh cho on OO



-

II.2.1.6. Tnh cho on OG



II.2.1.7. Tnh cho on O



II.2.1.8. Tnh cho on OC




126/171



II.2.1.9. Tnh cho on OU



II.2.1.10. Tnh cho on OH


- Hao tn cng sut phn khng trn dy

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