热平衡补偿在发电机转子热弯曲故障处理中的应用

Application of Thermal Balance Compensation in Thermal Bending Fault Treatment of Generator Rotor

针对某电厂4号机组带负荷后发电机转子振动不断爬升问题,分析了发电机转子振动异常的原因和机理,阐明发电机转子匝间短路和线圈膨胀受阻是引起振动异常的主要原因。结合静态RSO试验和现场实际情况,通过热平衡补偿,机组在空载和各负荷段轴系振动均达到了优良水平。

Aiming at the problem that the vibration of generator rotor of No.4 Unit in a power plant keeps climbing after load,the causes and mechanism of abnormal vibration of generator rotor are analyzed.It is clarified that the main causes of abnormal vibration are inter turn short circuit of generator rotor and blocked coil expansion.Combined with the static RSO test and the actual situation on site,the shafting vibration of the unit in no-load and each load section has reached an excellent level through heat balance compensation.