Short circuit current
Short circuit current
(OP)
How do One calculate the DC and AC time constant of the short circuit current
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RE: Short circuit current
RE: Short circuit current
The simplest case is that of a three phase fault at the terminals of the generator. The method is roughly the following:
Write equations for the voltages over all windings of the generator: Voltage = the time derivative of the flux linkage + the resistive voltage drop. (Some simplifying assumptions may be needed?) This gives a set of linear differential equations. Turn the crank (as my professor used to say), and out comes a set of time constants. Then just sort out, which time constant is which. It is easiest to start with a generator model with only one winding in the rotor, the field winding.
RE: Short circuit current
Can the OP provide any more information on the type of system under consideration?
RE: Short circuit current