표준화력 발전기 고정자 권선 절연재의 냉각수 온도에 따른 흡습 특성

Reliable water absorption diagnostics of generator stator bar is important to ensure the availability of power plant and to reduce maintenance cost by generator accident. Water absorption of bar insulation is progressed by several causes such as generation of water leak path by corrosion, delamination of insulation by vibration, and inadequate water treatment, etc.. It is described that the water absorption characteristics for generator stator bar used in standard fossil power plant by cooling water temperature. It is verified that the management of stator cooling water temperature is one of the important factors to decrease water absorption speed of generator stator bars.