水电机组转动惯量测定中的关键要点探讨

Discussion on key points of measuring moment of inertia of hydropower unit

从水电机组转动惯量的测定方法和原理入手,对比了不同测定方法的异同,得出了甩负荷加速试验更适用于水电机组转动惯量测定的结论,进而分析并探讨了甩负荷加速试验中的若干关键要点,包括调速器、励磁系统的设定及具体的试验步骤,建议利用加速曲线上额定转速处的切线确定机组的转速上升率,最后在一水电站进行实际测量,得到了较好的测定结果。

Starting from the measurement methods and principles of the moment of inertia of hydropower units,comparing the similarities and differences of different measurement methods,it is concluded that the load rejection acceleration test is more suitable for the measurement of the moment of inertia of hydropower units.Some key points in the load rejection acceleration test are analyzed and discussed,including the setting of the governor and excitation system and the specific test steps.It is recommended to use the tangent line at the rated speed on the acceleration curve to determine the speed rise rate of the unit.Ultimately,the actual measurement is carried out and good results are obtained in a hydropower station.