Facu & Geo Mail Red Circ AI D Para AI D Grar C Chat Hum Dow C 3) Fc ❘C Line | © gall | + ← с A gc.blackboard.com/ultra/courses/_384576_1/outline/edit/document/_12142936_1?courseld=_384576_1 The diagram below shows a HV transmission system supplied by two generating stations (GS1 & GS2). Both generators are operating at rated voltage. At each station the voltage is stepped up to a transmission level voltage. The HV buses are connected by a double circuit line. A load bus is located part way along one of the lines. Equipment characteristics are listed in the ETAP Project 2 data file. This project is to be completed using the Project 2 data which has been assigned to you. G1 mmm LINE 1 LINE 2 LOAD PROJECT 2 LINE 3 LINE 4 (G2) mm ☐ M ENG O Search W US 11:34 AM 2024-11-05
Using a value of SBASE = 100MVA, Using the Per Unit method and symmetrical components calculate expected fault current at the load bus shorted for a Line to Ground fault. All generators are operating at rated voltage. Assume all transformers are delta on the primary and grounded Y on the secondary.
G1 250 MVA
G1 20 KV
G1 pf 0.9
G1 %Xd" 17
G1 %X2 20
G1 %X0 6
G1 %Xd' 34
G2 300 MVA
G2 24 KV
G2 pf 0.9
G2 %Xd" 20
G2 %X2 24
G2 %X0 8
G2 %Xd' 40
T1 300 MVA
T1 Vpri 20
T1 Vsec 500
%Xpos 11
%Xzero 11
T2 350 MVA
T2 Vpri 24
T2 Vsec 500
%Xpos 12
%Xzero 12
Line 1
Xpos Ω 50
Xneg Ω 50
Xzero Ω 100
Line 2
Xpos Ω 50
Xneg Ω 50
Xzero Ω 100
Line 3
Xpos Ω 200
Xneg Ω 200
Xzero Ω 300
Line 4
Xpos Ω 200
Xneg Ω 200
Xzero Ω 300
Load 150 MVA
PF (Lagging) 0.9
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