Problems 1. Two synchronous machines are connected through three phase transformer to the transmission line as given in Fig. the ratings and reactance's of the machines and transformers are: Machines 1 and 2: 100 MVA; 20 kV; Xd"=X1=X2=20%; XO = 4%; Xn= 5% Transformers T1 and T2: 100MVA; 20/ 345 kV ; X=8% The line reactance's are X1=X2= 15% and X0=50%. The system is operating at nominal voltage without prefault currents when a bolted single line to ground fault occurs on the phase 'a' at bus 3. Determine the subtransient current to ground at the fault

Problems 1. Two synchronous machines are connected through three phase transformer to the transmission line as given in Fig. the ratings and reactance's of the machines and transformers are: Machines 1 and 2: 100 MVA; 20 kV; Xd"=X1=X2=20%; XO = 4%; Xn= 5% Transformers T1 and T2: 100MVA; 20/ 345 kV ; X=8% The line reactance's are X1=X2= 15% and X0=50%. The system is operating at nominal voltage without prefault currents when a bolted single line to ground fault occurs on the phase 'a' at bus 3. Determine the subtransient current to ground at the fault

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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