68
4.5. Elektr jixozlarni loyixlashda hisoblash
Ko‘pincha kondensator qurilmalari parametrlari loyihalash
bosqichida hisoblanadi. Ana’naviy usulda hisoblash (elektr
energiyani
o‘lchagichlarga asosan) imkoni yo‘q. Bo‘nday xollarda kondensator
batareyalar
tarkibiy tizimlari, uning quvvati taxminan pasaytiruvchi
transformatorning (YuK/PK) mos keladigan nominal quvvatining 25%
ni tashkil qiladiganini ulash tavisiya qilinadi.
Misol.
Transformator 1000 kVA => Q kondensatorlar = 250 kVAr.
Eslatma. Bunday o‘zaro nisbatlari quyidagi shartlarga to’g‘ri keladi:
- transformator quvvati 1000 kVA
- transformator ning amaldagi yuklanishi = 75%
- amaldagi yuklamalar cosφ = 0,80} (K - qiymatini 5.2 –jadvaldan
qarang, K= 0,421) - talab qilinadigan cosφ = 0,95}
Agar iste’molchining
quvvati kVt da, berilgan bo‘lsa, u holda
kondensatorlarning quvvatini hisoblash uchun 5.2-
jadvaldan K ning
kerakli qiymatini topish mumkin. Bundan tashqari, jadvalda cosφ ning
qiymatlari va ularga mos tgφ qiymati keltirilgan.
Kondensator batareyalarni hisoblash
4.2- jadval
Dastlabk
i quvvat
koeffitsi
enti
1 kVt yuklama uchun quvvat koeffitsientini zaruriy
orttirilishidagi kondensator quvvati (kvar)
cos φ
0.90 0.91 0.92 0.93 0.9
4
0.9
5
0.9
6
0.9
7
0.9
8
0.9
9
1,0
tg φ 0.48 0.46 0.43 0.40 036 0.3
3
0.2
9
0.2
5
0.2
0
0.1
4
0.0
0.4
0
2.2
9
1.80
5
1.83
2
1.86
1
1.89
5
1.9
24
1.9
59
1.9
98
2.0
37
2.0
85
2.1
46
2.2
88
0.4
1
2.2
2
1.74
2
1.76
9
1.79
8
1.83
1
1.8
40
1.8
96
1.9
35
1.9
73
2.0
21
2.0
82
2.2
25
0.4
2
2.1
6
1.68
1
1.70
9
1.73
8
1.77
1
1.8
00
1.8
36
1.8
74
1.9
13
1.9
61
2.0
02
2.1
64
71
0
5
6
4
1
5
87
21
59
99
41
08
50
0.8
1
0.7
2
0.24
0
0.26
8
0.29
5
0.32
4
0.3
61
0.3
95
0.4
33
0.4
73
0.5
15
0.5
82
0.7
24
0.8
2
0.7
0
0.21
4
0.24
2
0.26
9
0.30
3
0.3
35
0.3
69
0.4
07
0.4
47
0.7
89
0.5
56
0.6
98
0.8
3
0.6
7
0.18
8
0.21
6
0.24
3
0.27
7
0.3
09
0.3
43
0.3
81
0.4
21
0.4
63
0.5
30
0.6
72
0.8
4
0.6
5
0.16
2
0.19
0
0.21
7
0.25
1
0.2
83
0.3
17
0.3
55
0.3
95
0.4
37
0.5
04
0.6
45
0.8
5
0.6
2
0.13
6
0.16
4
0.19
1
0.22
5
0.2
57
0.2
91
0.3
29
0.3
69
0.4
17
0.4
78
0.6
02
0.8
6
0.5
9
010
9
0.14
0
0.16
7
0.19
8
0.2
30
0.2
64
0.3
01
0.3
43
0.3
90
0.4
50
0.5
93
0.8
7
0.5
7
0.08
3
0.11
4
0.14
1
0.17
2
0.2
04
0.2
38
0.2
75
0.3
17
0.3
64
0.4
24
0.5
67
0.8
8
0.5
4
0.05
4
0.08
5
0.11
2
0.14
3
0.1
75
0.2
09
0.2
46
0.2
88
0.3
35
0.3
95
0.5
38
0.8
9
0.5
1
0.02
8
0.05
9
0.08
6
0.11
7
0.1
49
0.1
83
0.2
30
0.2
62
0.3
09
0.3
69
0.5
12
0.9
0
0.4
8
0.00
7
0.03
1
0.05
8
0.08
9
0.1
21
0.1
55
0.1
92
0.2
34
0.2
81
0.3
41
0.4
84
Misol. Elektr dvigatel quvvati 200 kVt, dastlabki cosφ = 0,75,
talab
qilinadigan
.
93
,
0
cos
tashkil qiladi.
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