発電機回転子コイルの絶縁劣化調査について
Insulation Diagnosis Assessment for Field Coil of Turbine Generator Rotor
著者:
荒芝 智幸 Tomoyuki ARASHIBA 桑原 道明 Michiaki KUWAHARA 藤井 俊之 Shunji FUJII 石原 篤 Atsushi ISHIHARA 川井 政志 Masashi KAWAI
発刊日:
公開日:
Insulation diagnosis researchSamplingSlot armorTurbine generator rotor
概要
Generally, troubles of the insulations applied to turbine generator stator and rotor occur accordingly the bathtub curve. During the second half of operation life of the turbine generators, it is necessary to make periodic insulation diagnosis assessment to assure reliability and minimize forced outage.Electrical insulation diagnosis method is being adopted on stator coil at periodic outa ge, while any specific insulation method is established for the rotor field coil. For this issue, sampling of pulled out field coil insulation such as slot armor was carried out for life evaluatio n of turbine generator rotor field coil insulation during the 29th periodic outage conducted from November 8, 2010 at Shimane Nuclear Power Station Unit No.1 (520MVA, operated since March, 1974).
