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Simulation of internal faults in high-voltage cable-wound generators

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2 Author(s)
Touma-Holmberg, M. ; ABB, Vasteras, Sweden ; Srivastava, K.N.

An accurate determination of internal fault currents is needed for the design of adequate protection schemes for cable-wound high-voltage generators. A model of a synchronous machine in direct phase quantities for an internal single phase-to-ground fault is presented. A single phase-to-ground fault at the first turn near the generator neutral is simulated when the generator is either isolated or connected to a power system network. Simulations are also performed for when a single phase-to-ground fault occurs at different locations along the winding. The simulations are applied on the world's first high-voltage cable-wound generator installed at Porjus, Sweden which is rated at 45 kV and 11 MVA.

Published in:

Generation, Transmission and Distribution, IEE Proceedings-  (Volume:153 ,  Issue: 4 )

Date of Publication:

13 July 2006

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