发电机组轴系扭振监测装置的应用分析

Application Analysis of Generator Shaft Torsional Vibration Monitoring Device

根据东北电网的现状,分析UHVDC及风电接入对电网次同步振荡的影响,以东北某典型火电厂的轴系为研究对象,介绍传感器安装位置选择及转速信号的解调。通过分析实际录波文件,论证TMU装置对发电机组轴系扭振模态频率监测的有效性。同时分析当扰动发生时,轴系危险截面的疲劳累积百分比,论述了TMU装置在工程应用的必要性。

Based on the current situation of Northeast China power grid,it analyzes the influence of UHVDC and wind power integration on the subsynchronous oscillation.Taking the shafting of some thermal power plant in the northeast as the research object,it introduces the sensor installation position selection and the demodulation of the speed signal.Through analyzing the specific recording files,the effectiveness of the TMU device on the generator shaft torsional vibration model frequency monitoring is demonstrated.When the disturbance occurs,the cumulative fatigue percentage of the shaft dangerous section is analyzed and the necessity of the TMU device in the engineering application is summarized.