A synchronous generator with sub-transient reactance X'' is connected to a network with short-circuit MVA much larger than the generator MVA. For an external 3-phase fault near the generator terminals, which statement is correct about the generator contribution and post-fault rotor acceleration immediately after fault inception?

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Physics · Power Systems

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

The generator supplies near its internal limited sub-transient current; rotor acceleration depends mainly on mechanical input surplus.

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Answer 1

The generator supply depends only on network impedance; rotor acceleration is independent.

Answer 2

The generator supplies negligible current; rotor acceleration is zero.

Answer 3

The generator supplies infinite current; immediate loss of synchronism occurs.

Answer 4

The generator supplies near its internal limited sub-transient current; rotor acceleration depends mainly on mechanical input surplus.

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