Detection and Treatment on a Rotor Damper Winding Burning Fault Encountered by a Non-salient Pole Synchronous Generator
Nowadays commonly adopted flexible operating conditions cause increasing occurrence of generator rotor faults.This paper focuses on a rotor damper winding burning fault encountered by an actual 148.5 MVA generator.It reports and describes:the increase of shaft vibration during generator start-up process,the correlation between shaft vibration and active power significantly stronger than that between reactive power and excitation current,and the deterioration trend of rotor inter-turn insulation determined by means of repetitive surge ociloscope(RSO),as well as the observation of obvious burning marks on damper winding in retaining ring by returning disassembly of the rotor.The reported case is a typical damper winding burning fault,of which the adopted detection method and treatment experience may be useful for coping with similar events.
万方数据
维普
