Two identical synchronous machines, each rated (60 mathrm{MVA}) and (15 mathrm{kV}) with a subtransient reactance of 0.1
Question:
Two identical synchronous machines, each rated \(60 \mathrm{MVA}\) and \(15 \mathrm{kV}\) with a subtransient reactance of 0.1 p.u., are connected through a line of reactance 0.1 p.u. on the base of the machine rating. One machine is acting as a synchronous generator, while the other is working as a motor drawing \(40 \mathrm{MW}\) at 0.8 p.f. leading with a terminal voltage of \(14.5 \mathrm{kV}\), when a symmetrical threephase fault occurs at the motor terminals. Determine the subtransient currents in the generator, the motor, and the fault by using the internal voltages of the machines. Choose a base of \(60 \mathrm{MVA}\) and \(15 \mathrm{kV}\) in the generator circuit.
Step by Step Answer:
Power System Analysis And Design
ISBN: 9781305632134
6th Edition
Authors: J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma