A. Kanicki: Zwarcia w sieciach elektroenergetycznych ... - ssdservice.pl

A. Kanicki: Zwarcia w sieciach elektroenergetycznych
∆U
S
Z% pod 15 426
X() 1 T1 = X() 1 T2 =
= = 0. 15
100 S 100 426
NT1
∆U
S
Z% pod 11 426
X() 1 T3 =
= = 1. 87
100 S 100 25
NT2
Spod
426
X() 1 L1 = X()
1 L1 ⋅
= 40 ⋅
= 0.319
2
( 1.05 ⋅ U ) ( 1.05 ⋅ 220)
N L
Spod
426
X() 1 L2 = X()
1 L2 ⋅
= 20 ⋅
= 0.160
2
( 1.05 ⋅ U ) ( 1.05 ⋅ 220)
N L
Spod
426
X() 1 L3 = X()
1 L3 ⋅
= 60 ⋅
= 0.479
2
( 1.05 ⋅ U ) ( 1.05 ⋅ 220)
N L
Spod
426
X() 1 U1 = = = 0. 0533
S 8000
Z
Spod
426
X() 1 U2 = = = 0. 0710
S 6000
Z
4. Obliczenie impedancji elementów dla składowej zerowej
X 1
( 0 ) T1 = 0.9 X( 1) T = 0.9 ⋅ 0.15 = 0. 135
X 3
( 0 ) T3 = 0.9 X( 1) T = 0.9 ⋅1.87
= 1. 68
Spod
426
X( 0 ) L1 = X( 0)
L1 ⋅
= 100 ⋅
= 0.798
2
( 1.05 ⋅ U ) ( 1.05 ⋅ 220)
N L
Spod
426
X( 0 ) L2 = X( 0)
L2 ⋅
= 60 ⋅
= 0.479
2
( 1.05 ⋅ U ) ( 1.05 ⋅ 220)
N L
Spod
426
X( 0 ) L3 = X( 0)
L3 ⋅
= 160 ⋅
= 1.28
⎛ X( 0)
= ⎜
⎝
X()
1
2
( 1.05 ⋅ U ) ( 1.05 ⋅ 220)
N L
⎞
⎟ X() 1 U = 1.5 ⋅ 0.0533 0. 0799
⎠
U1
X( 0 ) U1
1
=
U1
2
2
2
2
2
2
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