Page 195 - 捷運技術 第31期

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U UTIL

161 kV BUS 1

XF 1

22 kV BUS 2
XLN 1 XLN 2

BUS 3 BUS 4

5000 kVA 4000 kVA
P.F. 0.95 Lag P.F. 0.95 Lag

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UTIL Max. 3-phase fault current 26.143kA `7290.2MVAa
System equivalent impedance 0.277+j3.60 Ω `R/X=0.077a
BUS1 Nominal system voltage 161kV
XF1 Primary 161kV ,delta
`15000KVAa Secondary 22.8kV ,wye-ground
Tap range/tap steps Á10% ~ 10% / 1.25%
%R , %X 0.512% , 7.98%
BUS 23334 Nominal system voltage 22kV
2
XLN1/XLN2 Material/cross section AL/500mm
Resistance R 0.079 Ω/km `0.127 Ω/milea
Reactance X 0.129 Ω/km `0.2076 Ω/milea
Capacitive reactance C 364nF/km `0.004529MΩ/milea
Current capacity 679/509A `in air/in ductsa
Length XLN1 : 2km `1.243milea
XLN2 : 3km `1.865milea

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