Question

Draw an impedance diagram for the electric power system shown in the figure attached, showing all impedances in per unit on a 100-MVA base. Choose 20kV as the voltage base for generator. The three-phase power and line-line ratings are given in the figure attached.

X = 9%
X-16%
X=20%
X = 9%
X=120 Ω
S 48 MW +j64 Mvar
1 90 MVA 20 kV
80 MVA
20/200kV
T2: 80 MVA 200 20 kV
G90 MVA 18 kV
Line:
Load
200 kV
200 kV
Τι
T2
Line
Load

Image Transcription

X = 9% X-16% X=20% X = 9% X=120 Ω S 48 MW +j64 Mvar 1 90 MVA 20 kV 80 MVA 20/200kV T2: 80 MVA 200 20 kV G90 MVA 18 kV Line: Load 200 kV 200 kV Τι T2 Line Load

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