System and method for monitoring a rapid de-excitation system for synchronous machines
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United States of America Patent
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Nov 22, 2016
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Jul 2, 2015
app pub date -
Jul 5, 2013
filing date -
Jul 9, 2012
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Abstract
A system and method for monitoring a rapid de-excitation system for synchronous machines with indirect excitation, via an exciter machine and a rotating rectifier bridge includes means for measuring the current and voltage of the stator of a synchronous machine, means for measuring the excitation current of the exciter machine, estimation means for obtaining the estimated excitation current of the exciter machine from the current and voltage values measured in the stator of the synchronous machine, a module for comparing the measured excitation current Imed with the estimated excitation current Iest, in such a way that there is either incorrect operation if Imed >k*Iest+A, where k and A are real numbers determined on the basis of each machine, or else there is correct operation.
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