Title :
In service turbine generators stator windings failure risks minimization on the base of discharge events on-line monitoring
Author_Institution :
DIACS Moscow, Russia
Abstract :
Results of the on-line insulation diagnostic of turbine generators are provided. Measures taken to ensure the reliability of 1000, 500, 220, 120 and 60 MVA generators are discussed. Features of faults that occurred in the various types of insulation are given. Results of the partial discharge locations using off-line diagnostics are provided. The approach for stator windings failure risks minimization has been demonstrated to be successful without subsequent failure: (i) about 70 turbine generators with no defects; (ii) 4 machines with arcing in core; (iii) 6 machines with slot discharges; and (iv) 15 with different insulation
Keywords :
computerised monitoring; failure analysis; partial discharge measurement; risk management; stators; turbogenerators; 60 to 1000 MVA; PD Sensor; arcing; insulation defects; insulation faults; noise rejection methods; off-line diagnostics; on-line insulation diagnostic; on-line monitoring; partial discharge locations; reliability; risks minimization; slot discharges; stator windings failure; turbine generators; visual inspection; Computer displays; Condition monitoring; Electromagnetic interference; Insulation; Partial discharge measurement; Partial discharges; Pulse measurements; Risk management; Stator windings; Turbines;
Conference_Titel :
Electrical Insulation Conference and Electrical Manufacturing & Coil Winding Conference, 2001. Proceedings
Conference_Location :
Cincinnati, OH
Print_ISBN :
0-7803-7180-1
DOI :
10.1109/EEIC.2001.965724
