MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202617074150 A) filed by Zapadoceska Univerzita V Plzni on June 15, 2026, for Method Of Detecting Fault In Excitation Rectifier Of Synchronous Generator.
Inventors include Peroutka, Zdenek; and Cibulka, Jiri.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: In the method of detecting fault in excitation rectifier of synchronous generator (1), field current (3) on a stationary DC side of an excitation source (2), or voltage on a DC side of a. stationary rectifier (7), is measured. Further, a frequency analysis is used to determine from measured signal an amplitude of fundamental harmonic and amplitude of all non-zero integer multiples of fundamental harmonic frequency. A per-unit current fault factor X, or a per-unit voltage fault factor Xuis calculated, a. reference fault- free per-unit current factor Xi_ref or a reference fault- free per-unit voltage factor Xu-refis measured, and reference per-unit fault factor Xi_err or Xu_err is determined, and a. per-unit fault detection threshold Xi-threshold or Xu threshold is determined. A. fault is signalled when determined values of the per-unit fault factor Xi or Xu are exceeded and/or the DC component of the measured field current (3) exceeds the permitted operation range and/or the rms value of the back EMF of the synchronous generator (1) is lower than the one corresponding to the minimum permitted operation field current (3).
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