“energo-mexanika” fakulteti

Variant 2. S_nt = 1600 (kVA)
Transformator TM-1600/6 tanlaymiz
∆P_xx = 3.3 kVt
∆P_kz = 16.5 kVt

Narxi:
K`_t2 = n ∙ K = 2 ∙ 113 828 000 = 227 656 000 so‘m

Yuklama koeffitsienti K_z = S_p / (n ∙ S_nt)

Ma’lumot uchun S_p=1572.5 kVt
K_z = 1572.5 / (2 ∙ 1600) = 0,50
1 yil uchun maksimal isrof vaqti
τ_m = (0,124 + T_m / 10000)² ∙ T_yil

T_m – To’xtovsiz ishlaganda maksimal isrof vaqti = 7000 soat

T_yil – Bir yildagi maksimal soat = 8760 soat


τ_m = (0,124 + 7000/ 10000)² ∙ 8760 = 5948 soat/yil
Bir yilda 1 kVt maksimal quvvatni narxi
m = β ∙ τ_m
β – qo‘shimcha stavka = 330 so‘m/kVt


m = 330 ∙ 5948 = 1 962 840 so‘m/kVt∙yil

1 va 2 toifa uchun to’g‘ri keladi.

m = 1 962 840 (so‘m/kVt∙yil) da 1 kVt ni bir yillik salt ishlashida maksimal isrofi
m₀ = β ∙ T_V
m₀ =330 ∙ 8760 = 2 890 800 so‘m/kVt∙yil
Transformatordagi bir yillik isrof narxi
U_p1 = n (m ∙ ∆P_kz ∙ K₃² + m₀ ∙ ∆P_xx) = 2 ∙(1962840 ∙16.5 ∙ 0,5² + 2890800 ∙ 3.3) = =35 272 710 so‘m/yil
Podstansiya va taqsimlash qurilmalarni elektr texnik jihozlari uchun amortizatsiyaga chiqim normasida: E_a =0,063
U_a = K`<sub>t1</sub> ∙ E<sub>a</sub> = 227 656 000∙ 0,063 = 14 342 328 so‘m
Joriy ta’mirlash va xizmat ko‘rsatishga chiqim:
E<sub>tr</sub> = 0,03
U<sub>tr</sub> = K`_t1 ∙E_tr =227 656 000∙ 0,03 = 6 829 680 so‘m

Ekspluatatsiya chiqimlari:

U_t1 = U_p1 + U_a + U_tr = 35 272 710+ 14 342 328+ 6 829 680= 56 444 718 so‘m
Keltirilgan xarajat E_n = 0,12
Z_pt = E_n ∙ K`_t1 + U_t1 = 0,12 ∙ 227 656 000+ 56 444 718 = 83 763 438 so‘m

1- variantni keltirilgan xarajati 2 variantga nisbatan kam va hamma ko‘rsatkichlari jihatdan tejamli – Variant 1- TM 1000/6 kVA ni loyiha uchun tanlaymiz.

Variantini tanlash bo’yicha taqqoslash 7-jadvalda keltirilgan.

7-jadval

Taqqoslanadigan kattaliklarni nomlanishi	Variant 1	Variant 2
1. Tanlangan transformatorlar quvvati [kVA]	1000	16000
2 Narxi [mln.so‘m]	194.480	227.656
3. Yuklama koeffitsienti Kz	0.78	0.50
4. 1yil el. en. isrof narxi Up [mln.so‘m/yil]	17.453	35.272
5. Amortizatsiyaga chiqim [mln.so‘m]	12.252	14.342
6. Joriy ta’mir. va xiz. ko‘rsat.chiqim [mln.so‘m]	5.834	6.829
7. Ekspluatatsiya chiqimlari [mln.so‘m]	35.540	56.444
8. Keltirilgan xarajatlar[mln.so‘m]	58.877	83.763

O‘z xarajatini qoplash muddati:

T_ok­= (K`<sub>t2</sub> - K`_t1) / (U_t1 – U_t2) = (227.656 – 194.480) / (56.444– 35.540) =
=33.176 / 20.904 = 1.58 yil

Demak birinchi variant tejamli va loyiha uchun qabul qilamiz.

3.4 Kabel liniyalarini tanlash.

0,4 kV uchun alyuminiy tomirli uch fazali ASB, AOSB markali to’rtta tomirli kabel tanlaymiz

6 kV kuchlanish uchun uch fazali kabel AASHvni tanlaymiz.


1) 6 kV li shina oraqali ta’minlanayotgan 400 kVt dvigatelni kabel liniyasini tanlaymiz.


S=375 kVA, U_n=6 kV, L= 118.48 m = 0,11848 km
a) Hisobiy tok
I_p = 375 /(1,73 ^. 6)=36 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=36 /1,2=30 mm²

c) Kabel transheyada AASHv (3x35) tanlanadi

I_d.d=115 A; ΔP=42 kVt/km; K=40.040 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=36/115=0,31

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

K`=40.040 ^. 0.11848 ^.1 = 4.743 mln. so‘m

f) Energiya isrofi

ΔW=42 ^. 0,31^2. 1 ^. 0,11848=0.48 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=0.48 ^. 1962840=0.942 mln. so‘m / yil


2) 6 kV li shina oraqali ta’minlanayotgan 400 kVt dvigatelni kabel liniyasini tanlaymiz.


S=375 kVA, U_n=6 kV, L= 118.48 m = 0,11848 km
a) Hisobiy tok
I_p = 375 /(1,73 ^. 6)=36 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=36 /1,2=30 mm²

c) Kabel transheyada AASHv (3x35) tanlanadi

I_d.d=115 A; ΔP=42 kVt/km; K=40.040 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=36/115=0,31

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

K`=40.040 ^. 0.11848 ^.1 = 4.743 mln. so‘m

f) Energiya isrofi

ΔW=42 ^. 0,31^2. 1 ^. 0,11848=0.48 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=0.48 ^. 1962840=0.942 mln. so‘m / yil
3) 6 kV li shina oraqali ta’minlanayotgan 280 kVt dvigatelni kabel liniyasini tanlaymiz.


S=270.5 kVA, U_n=6 kV, L= 60.27 m = 0,06027 km
a) Hisobiy tok
I_p = 270.5 /(1,73 ^. 6)=26 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=26 /1,2=21.7 mm²

c) Kabel transheyada AASHv (3x25) tanlanadi

I_d.d=90 A; ΔP=40 kVt/km; K=39.182 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=26/90=0,29

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

K`=39.182 ^. 0.06027 ^.1 = 2.361 mln. so‘m

f) Energiya isrofi

ΔW=40 ^. 0,29^2. 1 ^. 0,06027=0.20 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=0.20 ^. 1962840=0.392 mln. so‘m / yil


4) 6 kV li shina oraqali ta’minlanayotgan 280 kVt dvigatelni kabel liniyasini tanlaymiz.


S=270.5 kVA, U_n=6 kV, L= 60.27 m = 0,06027 km
a) Hisobiy tok
I_p = 270.5 /(1,73 ^. 6)=26 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=26 /1,2=21.7 mm²

c) Kabel transheyada AASHv (3x25) tanlanadi

I_d.d=90 A; ΔP=40 kVt/km; K=39.182 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=26/90=0,29

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

K`=39.182 ^. 0.06027 ^.1 = 2.361 mln. so‘m

f) Energiya isrofi

ΔW=40 ^. 0,29^2. 1 ^. 0,06027=0.20 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=0.20 ^. 1962840=0.392 mln. so‘m / yil
5) 6 kV li shina oraqali ta’minlanayotgan 850 kVt dvigatelni kabel liniyasini tanlaymiz.


S=800 kVA, U_n=6 kV, L= 166.6 m = 0.1666 km
a) Hisobiy tok


I_p = 800 /(1,73 ^. 6)=77 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=77 /1,2=64.1 mm²

c) Kabel transheyada AASHv (3x70) tanlanadi

I_d.d=165 A; ΔP=44 kVt/km; K=58.201 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=77/165=0,47

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

K`=58.201 ^. 0.1666 ^.1 = 9.696 mln. so‘m

f) Energiya isrofi

ΔW=44 ^. 0,47^{2 .} 1 ^. 0,1666=1.62 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=1.62 ^. 1962840=3.179 mln. so‘m / yil
6) 6 kV li shina oraqali ta’minlanayotgan 850 kVt dvigatelni kabel liniyasini tanlaymiz.


S=800 kVA, U_n=6 kV, L= 162.6 m = 0.1626 km
a) Hisobiy tok


I_p = 800 /(1,73 ^. 6)=77 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=77 /1,2=64.1 mm²

c) Kabel transheyada AASHv (3x70) tanlanadi

I_d.d=165 A; ΔP=44 kVt/km; K=58.201 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=77/165=0,47
e) Kabelni narxi K`=K <sup>.</sup> L <sup>.</sup> n
K`=58.201 ^. 0.1626 ^.1 = 9.463 mln. so‘m

f) Energiya isrofi

ΔW=44 ^. 0,47^{2 .} 1 ^. 0,1626=1.58 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=1.58 ^. 1962840=3.101 mln. so‘m / yil


7) 6 kV li shina oraqali ta’minlanayotgan 3050 kVt dvigatelni kabel liniyasini tanlaymiz.


S=2875.6 kVA, U_n=6 kV, L= 229.38 m = 0.22938 km
a) Hisobiy tok


I_p = 2875.6 /(1,73 ^. 6)=277 A
b) Kabelni ko‘ndalang kesim yuzasi , bunda j_e = 1,2 A/mm²
F=277 /1,2=230.84 mm²

c) Kabel transheyada AASHv (3x240) tanlanadi

I_d.d=351 A; ΔP=120 kVt/km; K=152.867 mln. so‘m /km
d) Yuklama koeffitsienti

K₃=277 / 351=0,78
e) Kabelni narxi K`=K <sup>.</sup> L <sup>.</sup> n
K`=152.867 ^. 0.22938 ^.1 = 35.064 mln. so‘m

f) Energiya isrofi

ΔW=120 ^. 0,78^{2 .} 1 ^. 0,22938=16.7 kVt

g) Bir yil uchun elektr energiya isrofi narxi

U_PE=16.7 ^. 1962840=32.779 mln. so‘m / yil