中小型水轮发电机定子铁心温高异常分析

Analysis on Abnormal Temperature Rise of Stator Core of Small and Medium Sized Hydro-Turbine Generators

针对某发电站60 MW发电机定子铁心温升异常问题,对造成温升异常的原因进行详细分析,最终确定引起该发电机温升异常的主要原因是定子铁芯片间绝缘性能降低或铁心松动导致涡流增大。实际检测结果与理论分析结果相吻合,证明了分析方法的正确性。结合理论分析以及检测结果,提出解决该类温升异常的后续处理流程,对解决类似电机温升异常的问题具有参考和借鉴意义。

This paper analyzes in detail the causes of abnormal temperature rise of stator core of 60MW turbine generator in a power station.It is found that the reason for abnormal temperature rise of the generator is the reduction of the insulation performance between the stator core sheets or current increase caused by looseness of the core.The actual test results are consistent with the theoretical analysis results,which proves the correctness of the analysis method.Combined with the theoretical analysis and detection results,the follow-up processing procedure for solving this kind of abnormal temperature rise is proposed in this paper,which has reference significance for solving the problem of abnormal temperature rise of the motor.