Resumen
A system and method for monitoring a rapid de-excitation system for synchronous machines (1) with indirect excitation, via an exciter machine (2) and a rotating rectifier bridge (8), comprising: means for measuring the current (13) and voltage (14) of the stator (4) of the synchronous machine (1); means for measuring the excitation current (15) of the exciter machine (2); estimation means (24) for obtaining the estimated excitation current (19) of the exciter machine (2) from the current (16) and voltage (17) values measured in the stator (4) of the synchronous machine (1); a module (28) for comparing the measured excitation current Imed (18) with the estimated excitation current Iest (19), in such a way that: there is either incorrect operation if Imed>·Iest+A, where k and A are real numbers determined on the basis of each machine; or else there is correct operation.