DYAGNOSYS FOR THE MAGNETIC CORE OF POWER GENERATORS, USING INFRARED THERMOVISION

The classical Thermal Loop Test up to national standards of prophylactic measurement for high voltage rotating machinery was improved by the intermediate of thermo-graphic inspection with a last generation of INFRARED THERMOVISION CAMERA.The method generates thermo-graphic maps by intermediate of a dedicated software of the internal cylindrical surface of the magnetic core of the rotating machinery.The thermo-graphic maps are generated in strictly identical condition at the start of the generator, as well as at the major planned outages after 5, 10, 15, 20 years of functioning. The proposed method of testing allowed the users to compare the thermo-graphic maps and to put in evidence the “thermal hot spots― (respectively the magnetically failures) and their evolution in time and gives the users the possibility to establish the moment of partial or complete replacement of the iron core.