A DYNAMIC METHOD FOR THE TEST DIAGNOSTICS OF LOCAL THERMAL DEFECTS IN THE STATOR WINDING OF A TURBOGENERATOR WITH WATER COOLING

摘要

A method of detecting local breakdowns of the circulation of distillate in the hollow conducting windings of the stator of a turbogenerator with water cooling, based on a measurement of the temperature of the distillate in the discharge from the rods in the transitional thermal mode of operation after the stator current is switched off, is proposed. The criterion of significance of recognized thermal anomalies is validated by mathematical modeling of the nonstationary temperature field in the core of the winding for different types of clogging of the hollow conductors. In order to use the proposed test diagnostics in electric power plants it is necessary to use an automatic multichannel system of regular thermal monitoring of the turbogenerator.