«Elektr energetikasi» kafedrasi

5.3. Variant 1. Kabel liniyalarni tanlash.
0,4 kV uchun alyuminiy tomirli uch fazali ASB, AOSB markali turtta tomirli kabel tanlaymiz

10 kV kuchlanish uchun uch fazali kabel AASHV ni tanlaymiz.

Kabelni yotqizishni transheyada bajaramiz.
KTP-1:

GPP dan KTP-1gacha

S=726+356.1=1082.1 kVA, U_n=10 kV, L= 285 m = 0,285km

a) Hisobiy tok

I_p = 1082.1/(2 ^. 1,73 ^. 10)=31.2 A

b) Avariya rejimidagi tok

I_a = 1082.1/(1,73 ^. 10)=62.5 A

v) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²

F=31.2 /1,2=26 mm²

g) Kabel transheyada 2xAASHv (3x25) tanlanadi

I_d.d=90 A; ΔR=40 kVt/km ; K=31.35 mln. so‘m /km

d) Avariya rejimida I_d.d> I_a = 90 > 62.5 – etarli

e) YUklama koeffitsienti



K₃=31.2/90=0.34

j) Kabelni narxi K`=K ^. L ^. n

K`=31.35 ^. 0.285 ^. 2 = 17.18 mln. so‘m

z) Energiya isrofi

ΔW=40 ^. 0,34^2. 2 ^. 0.285=2.63 kVt

k) Bir yil uchun elektr energiya isrofi narxi

U_PE=2.63 ^.180100=0.47 mln. so‘m / yil

KTP-1 danRU1 gacha

S=356.1kVA, U_n=0,4 kV, L= 15 m = 0,015 km

a) Hisobiy tok

I_p = 356.1/(4 ^. 1,73 ^. 0,4)=128.6 A

b) Avariya rejimidagi tok

I_a = 356.1/(2 ^. 1,73 ^. 0,4)=257.2 A

v) Kabelni ko‘ndalang kesim yuzasi , gde j_e = 1,2 A/mm²

F=128.6 /1,2 ^.2 =53.6mm²

g) Kabelni yotkizishni transheyada bajaramiz 4xASB (3x95+1x50)

I_d.d=2x240 A; ΔR=85 kVt/km; K=36.5 mln. so‘m /km

d) Avariya rejimida 1,3 ^.I_d.d> I_a = 624 < 514.4– etarli

e) YUklama koeffitsienti



K₃=257.2 /480=0.53

j) Kabelni narxi K`=K ^. L ^. n

K`=36.5 ^. 0,015 ^. 4 = 2.19 mln. so‘m

z) Quvvat isrofi

ΔW=85 ^. 0,53^2. 4 ^. 0,015=1.43 kVt

k) Bir yil uchun elektr energiya isrofi narxi

U_PE=1.43 ^. 180100=0.258 mln. so‘m / yil
KTP-2:

GPP dan KTP-2gacha

S=979.29+443.9+83+390.1=1896.29 kVA, U_n=10 kV, L= 170 m = 0,17 km

a) I_p = 1896.29/(2 ^. 1,73 ^. 10)=54.8 A

b) I_a = 1896.29/(1,73 ^. 10)=109.6 A

v) Kabelni ko‘ndalang kesim yuzasi F=54.8 /1,2=45.6mm²

g) Kabelni yotqizishni transheyada bajaramiz 2xAASHv (3x50)

I_d.d=140 A; ΔR=44 kVt/km; K=1,61 mln. so‘m /km

d) Avariya rejimida I_d.d> I_a = 140 > 109,6 – etarli

e) K₃=54,8 /140=0,39

j) K`=1,61 ^. 0,17 ^. 2 = 0,54 mln. so‘m

z) ΔW=44 ^. 0,39^2. 2 ^. 0,17=2,27 kVt

k) U_PE=2,27^. 180100=0,4 mln. so‘m / yil

KTP-2 dan RU2 gacha

S=443.9kVA, U_n=0,4 kV, L= 65 m = 0,065 km

a) I_p = 443.98/(4 ^. 1,73 ^. 0,4)=160.3 A

b) I_a = 443.9/(2 ^. 1,73 ^. 0,4)=320.7 A

v) Kabelni ko‘ndalang kesim yuzasi F=160.3 /1,2 =133.58mm²

g) Kabelni yotqizishni transheyada bajaramiz 4xASB (3x120+1x70)

I_d.d=2x305 A; ΔR=88 kVt/km; K = 54 mln. so‘m /km

d) Avariya rejimida 1,3 ^.I_d.d> I_a = 793 > 641.4 – etarli

e) K₃=320.7/610=0,52

j) K`=54 ^. 0,065 ^. 4 = 14,04 mln.so‘m

z) ΔW=88 ^. 0,52^2. 4 ^. 0,065=6,18 kVt

k) U_PE=6,18 ^. 180100=1,11 mln. so‘m / yil
KTP-2 dan RU3 gacha

S=83 kVA, U_n=0,4 kV, L= 105 m = 0,105 km

a) I_p = 83/(2 ^. 1,73 ^. 0,4)=60 A

b) I_a = 83/( 1,73 ^. 0,4)=120A

v) Kabelni ko‘ndalang kesim yuzasi F=60 /1,2 =50 mm²

g) Kabelni yotqizishni transheyada bajaramiz 4xASB (3x50+1x25)

I_d.d=165 A; ΔR=77 kVt/km; K = 23,5 mln. so‘m /km

d) Avariya rejimida 1,3 ^.I_d.d> I_a = 214,5 > 120 – etarli

e) K₃=60/214,5=0,28

j) K`=77 ^. 0,105 ^. 4 = 32,34 mln.so‘m

z) ΔW=77 ^. 0,28^2. 4 ^. 0,105=2,53 kVt

k) U_PE=2,53 ^. 180100=0,455 mln. so‘m / yil

KTP-2 dan RU4 gacha

S=390,1 kVA, U_n=0,4 kV, L= 140 m = 0,140 km

a) I_p = 390,1/(4 ^. 1,73 ^. 0,4)=141 A

b) I_a = 390,1/(2 ^. 1,73 ^. 0,4)=282A

v) Kabelni ko‘ndalang kesim yuzasi F=141 /1,2 =117,5 mm²

g) Kabelni yotqizishni transheyada bajaramiz 4xASB (3x120+1x70)

I_d.d=2x305 A; ΔR=88 kVt/km; K = 54 mln. so‘m /km

d) Avariya rejimida 1,3 ^.I_d.d> I_a = 793 > 564 – etarli

e) K₃=141/305=0,46

j) K`=54 ^. 0,14 ^. 4 = 49,28 mln.so‘m

z) ΔW=88 ^. 0,46^2. 4 ^. 0,14=2,53 kVt

k) U_PE=2,53 ^. 180100=0,455 mln. so‘m / yil
KTP-3:
GPP dan KTP -3gacha

S=834.9+403.8=1238.7 kVA, U_n=10 kV, L= 25 m = 0,025 km

a) I_p = 1238.7 /(2 ^. 1,73 ^. 10)=35.8 A

b) I_a = 3344,2 /(1,73 ^. 10)=71.6 A

v) Kabelni ko‘ndalang kesim yuzasi F=35.8/1,2=30 mm²

g) Kabelni yotqizishni transheyada bajaramiz 2xAASHv (3x35)

I_d.d=2*115 A; ΔR=42 kVt/km; K=36 mln. so‘m / km

d) Avariya rejimida I_d.d> I_a = 115> 71.6 – etarli

e) K₃=35.8/115=0,31

j) K`=36 ^. 0,025 ^. 4 = 3.6 mln.so‘m

z) ΔW=42 ^. 0,31^2. 4 ^. 0,025=0.4 kVt

k) U_PE=0.4 ^. 180100=0.72 mln. so‘m / yil
GPP dan RP-1 gacha

S=2338 kVA, U_n=10 kV, L= 140 m = 0,140 km

a) I_p = 2338/(2 ^. 1,73 ^. 10)=67.5 A

b) I_a = 904,2/(1,73 ^. 10)=135.1 A

v) Kabelni ko‘ndalang kesim yuzasi F=67.5/1,2=55mm²

g) Kabelni yotkizishni transheyada bajaramiz 2xAASHv (3x50)

I_d.d=140 A; ΔR=44 kVt/km; K=1,61 mln. so‘m /km

d) Avariya rejimida I_d.d> I_a = 140 > 135.1 – etarli

e) K₃=67.5/140=0,48

j) K`=1,61 ^. 0,14 ^. 2 = 0.45 mln. so‘m

z) ΔW=44 ^. 0,48^2. 2 ^. 0,14=2.83 kVt

k) U_PE=2.83 ^. 180100=5.11 mln. so‘m / yil
KTP-3 dan RU-5 gacha

S=403.8 kVA, U_n=0,4 kV, L= 85 m = 0,085 km

a) I_p = 403.8/(4 ^. 1,73 ^. 0,4)=145.8 A

b) I_a = 403.8/(2 ^. 1,73 ^. 0,4)=291.7A

v) Kabelni ko‘ndalang kesim yuzasi F=145.8 /1,2 =121.56 mm²

g) Kabelni yotqizishni transheyada bajaramiz 4xASB (3x120+1x70)

I_d.d=2x305 A; ΔR=88 kVt/km; K = 54 mln. so‘m /km

d) Avariya rejimida 1,3 ^.I_d.d> I_a = 793 > 583.4 – etarli

e) K₃=145.8/305=0.47

j) K`=54 ^. 0,085 ^. 4 = 18.36 mln.so‘m

z) ΔW=88 ^. 0,47^2. 4 ^. 0,085=6.6 kVt

k) U_PE=6.6 ^. 180100=1.19 mln. so‘m / yil

KTP-4:

KTP-4 RP2 dan ta’minlanadi, shunday RP2 dan 6- sexni sinxron dvigatellari ta’minlanadi.

GPP danRP2 gacha

S=1485+1411=2896 kVA, U_n=10 kV, L= 70 m = 0,07 km

a) I_p = 2896 /(4 ^. 1,73 ^. 10)= 41.8A

b) I_a = 2896 /(2*1,73 ^. 10)=83.6 A

v) Kabelni ko‘ndalang kesim yuzasi F=41.8/1,2=34.8mm²

g) Kabelni yotkizishni transheyada bajaramiz 2xAASHv (3x35)

I_d.d=2*115 A; ΔR=42 kVt/km; K=36 mln. so‘m / km

d) Avariya rejimida I_d.d> I_a = 115 > 83.6 – etarli

e) K₃=41.8/115=0,36

j) K`=36 ^. 0,07 ^. 4 = 10.08 mln. so‘m

z) ΔW=42 ^. 0,36^2. 4 ^. 0,07=1.52 kVt

k) U_PE=1,52 ^. 180100=0.27mln. so‘m / yil

RP2 danKTP-4gacha

S=1411 kVA, U_n=10 kV, L= 10 m = 0,01 km

a) I_p = 1411/(2 ^. 1,73 ^. 10)=40.7 A

b) I_a = 1411/(1,73 ^. 10)=81.5 A

v) Kabelni ko‘ndalang kesim yuzasi F=40.7/1,2=33.9mm²

g) Kabelni yotkizishni transheyada bajaramiz 2xAASHv (3x35)

I_d.d=115 A; ΔR=42 kVt/km; K=36 mln

d) Avariya rejimida I_d.d> I_a = 115 > 81.5 – etarli

e) K₃=40.7/115=0.35

j) K`=36 ^. 0,01 ^. 2 = 0,72 mln. so‘m

z) ΔW=42 ^. 0,35^2. 2 ^. 0,01=0.1 kVt

k) U_PE=0,1 ^. 180100=0.018 mln. so‘m / yil

KTP-5:

GPP dan KTP-5 gacha

S=867.3+576.8=1444.1 kVA, U_n=10 kV, L= 195 m = 0,195 km

a) I_p = 1444.1 /(2 ^. 1,73 ^. 10)=41.7A

b) I_a = 1233.6 /(1,73 ^. 10)=83.4 A

v) Kabelni ko‘ndalang kesim yuzasi F=41.7/1.2=34.7mm²

g) Kabelni yotkizishni transheyada bajaramiz 2xAASHv (3x35)

I_d.d=115 A; ΔR=42 kVt/km; K=36 mln

d) Avariya rejimida I_d.d> I_a = 115 > 83.4 – etarli

e) K₃=41.7/115=0.36

j) K`=36 ^. 0.195 ^. 2 = 14.04 mln. so‘m

z) ΔW=42 ^. 0,36^2. 2 ^. 0.195=2.1 kVt

k) U_PE=2.1*180100=0.38 mln. so‘m / yil

KTP-5 dan RU6 gacha

S=576.8kVA, U_n=0,4 kV, L= 65 m = 0,065km

a) I_p = 576.8/(4 ^. 1,73 ^. 0,4)=208.3 A

b) I_a = 576.8/(2 ^. 1,73 ^. 0,4)=416.7 A

v) Kabelni ko‘ndalang kesim yuzasi F=208.3/1,2 ^.2 =86.8 mm²

g) Kabelni yotkizishni transheyada bajaramiz 4xASB (3x95+1x50)

I_d.d=2x240 A; ΔR=85 kVt/km; K=36.5 mln. so‘m /km

d) Avariya rejimida 1,3 ^.I_d.d> I_a = 624> 416.7 – etarli

e) K₃=416.7/480=0.85

j) K`=36.5^. 0,065 ^. 2 = 4.7 mln. so‘m

z) ΔW=85 ^. 0,85^2. 2 ^. 0,065=7.9 kVt

k) U_PE=7.9^. 180100=1.43 mln. so‘m / yil

1-variant kabel liniyani texnik iqtisodiy ko‘rsatkichlarni tanlash.

a) Kapital mablag‘i:

K`_l=17.18+2.19+0.54+14.04+32.34+49.28+3.6+18.36+0.45+10.8+0.72+14.04+4.7=170 mln. so‘m

b) Kabel liniyada bir yillik elektr energiya isrofi narxi:

U_pel`=0.47+0.258+0.4+1.11+0.455+0.455+0.72+1.19+5.11+0.018+0.27+0.38+1.43 =12.2 mln. so‘m /yil