Online detection of short-circuit windings in generator field windings

摘要

A method for detecting a shorted turn in a synchronous machine having a rotor using a magnetic flux probe includes the steps of: monitoring (30) a signal from the flux probe during on-line operation of the machine; integrating (37) the flux probe signal to generate a flux density data trace that repeats during each rotor revolution; upon detecting movement in the flux density zero-crossing, capturing the flux probe signal for a current rotor revolution for a variety of machine load conditions (39,44), and performing a shorted turn analysis with the captured flux signal data (45,46,48). IMAGE