摘要
轴心轨迹是水电机组状态监测系统中判断机组状态的一个重要特征,为便于直观判断水电机组轴心轨迹的动态运行状况,基于Qt4平台研制了一种动态分析轴心轨迹的软件功能模块。该模块首先对水电机组振摆监测装置记录上送的COMTRADE格式录波文件进行解析,从而获取轴承座上相互正交位置的振动信号录波数据;然后,基于解析获取振动数据,实现了振动信号时域波形展示、轴心轨迹图动态绘制、轴心轨迹特征量指标实时计算等功能。实例分析结果显示,随着振动信号时域波形中分析数据窗的动态移动,轴心轨迹及其相应的特征量可呈现动态变化的效果;同时,在此动态分析过程中,若实时计算的特征量越过预设的动作门槛时,则判断机组轴心轨迹在该时刻发生异常并发出报警信号。由此,将水电机组轴心轨迹分析从传统的静态展示优化为动态展示,便于故障过程的追溯和分析。
The shaft centerline orbit is an important characteristic to judge the unit status in the hydropower unit status monitoring system. In order to intuitively judge the dynamic running condition of the shaft centerline orbit of hydropower unit,a software function module for dynamic analysis of the shaft centerline orbit is developed based on Qt4 platform. At first,the module analyzes the COMTRADE format recording file recorded and sent by the vibration monitoring device of hydropower unit,and then obtains the vibrating signal data recorled from the mutually orthogonal locations on bearing seat. Afterward,the functions of the vibration signal time-domain waveform display,dynamic drawing of the shaft centerline orbit,real-time calculation of the characteristic index of shaft centerline orbit,etc. are realized. The actual case analysis result shows that along with the dynamic movement of the analysis data window in the time-domain waveform of vibration signal,the shaft centerline orbit and its corresponding characteristic values can present dynamic change effects. Meanwhile,if the characteristic values from the real-time calculation excess over the preseted action threshold during the dynamic analysis,the occurrence of the abnormality of the unit shaft centerline orbit is to be judged and the corresponding alarm signal is to be sent out. Therefore,the analysis on the shaft centerline orbit of hydropower unit is optimized from the conventional static display to the dynamic display,which is convenient for the tracing and analysis of the fault process concerned.
作者
崔亚芹
钟守平
潘安伟
张琦雪
祁忠
CUI Yaqin;ZHONG Shouping;PAN Anwei;ZHANG Qixue;QI Zhong(NR Electric Co.,Ltd.,Nanjing 211102,Jiangsu,China)
出处
《水利水电技术》
CSCD
北大核心
2018年第7期122-128,共7页
Water Resources and Hydropower Engineering
基金
南瑞继保SPIF项目(R&D-2016013)
