Page 45 - РЕЛЕ ҲИМОЯСИ БЎЙИЧА УМУМИЙ ТУШУНЧАЛАР

3. TEXNIK – IQTISODIY KO‘RSATKICHLAR

3.1 Liniya va transformatordagi yillik energiya isroflarini hisoblash.

Yuqorida himoyalanayotgan liniya va transformatordagi yillik energiya

isroflarini hisoblaymiz.

Transformatorning qushimcha ma’lumotlari:  P pul  6 , 5 kVt ,  Q pul  36 kVAr ,

r  5 , 2 Om , x  22 9 , Om,  t  4000 soat
t
t
Liniyaning aktiv va reaktitv qarshiliklari:

r  r  l  , 0 306 10  , 3 06 Oм; x  x  l  , 0 421 10  , 4 21 Oм,  t  4000 soat
l
o
l
o
Yuklama ma’lumotlari S yuk  3 , 3 MVA , cosφ=0,85.
Yuklamaning aktiv quvvati: P yuk  S yuk  cos  3 , 3 , 0  85  8 , 2 MVt


Yuklamaning reaktiv quvvati: Q yuk  P  tg  8 , 2 , 0  62  , 1 74 MVAr
yuk
Transformatordagi quvvat isrofi:

P 2  Q 2 P 2  Q 2 8 , 2 2  , 1 74 2 8 , 2 2  , 1 74 2
 S  yuk yuk  r  j yuk yuk  x   5 , 2  j  22 9 ,   022,0  j 203 MVA
0
,
t
2
2
U nom t U nom t 35 2 35 2
Transformatordan o‘tayotgan quvvat:
S  P  jQ   S  8 , 2  j 74  022,0  j 203   778,2  j 537 MVA
,
,
,
0
1
1
tr yuk yuk t
Liniyadan chiqayotgan quvvat quvvat:
'
S  S   S pul  , 2 778 j 537  0056,0  j 036   77,2  j 5 MVA
,
,
1
1
,
0
tr
l
Liniyadagi quvvat isrofi:
P  Q 2 P  Q 2 , 2 77  5 , 1 2 , 2 77  5 , 1 2
2
2
2
2
 S  l l  r  j l l  x  , 3  06  j , 4  21  025,0  j 034 MVA
0
,
l
U 2 l U 2 l 35 2 35 2
nom nom
Sistemadan liniyaga kelayotgan quvvat:
'
,
0
,
1
1
S  S   S  , 2 77  j 5  025,0  j 034   745,2  j 466 MVA
,
sis t l
Transformatordagi yillik energiya isrofi:
 W   P  t   P pul  t  , 022 4000  0056 8760  578 6 , 10 3 kVt  soat
0
0
,
t
t
Liniyadagi yillik energiya isrofini aniqlaymiz:
 W   P  l  , 025 4000 100 10 3 kVt  soat
0
l
l

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