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Assessment of Insulation Condition in Operating Large Turbine Generator  

김희동 (한전 전력연구원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.53, no.6, 2004 , pp. 324-329 More about this Journal
Abstract
Six stator slot couplers(SSC) and a flux probe sensor installed on the stator winding slots of large turbine generator. Assessment of insulation condition has been based upon the measurements of partial discharge(PD) of stator windings and shorted-turn of rotor windings in operating large turbine generator. The maximum PD magnitude(Qm), normalized quantify number(NQN), PD pattern and shorted-turn were measured using on-line insulation condition monitoring system. The NQN and Qm of slot PD side in the phase A are indicated the highest value in six SSC sensors. Monitoring system results showed that discharge at conductor surface and internal discharge were detected at the surface of stator winding and in voids of the groundwall insulation. Insulation of stator and rotor windings in large turbine generator was judged to be in good condition.
Keywords
generator; stator winding; rotor winding; insulation condition; assessment; PD; shorted-turn;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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