基于运行参数相关分析的汽轮机组碰磨故障诊断方法及其应用  

Rubbing Fault Diagnosis Method and Application of Steam Turbine Unit Based on Correlation Analysis of Operating Parameters

作　　者：王颖[1] 李录平[1] 陈尚年 张世海 WANG Ying;LI Lu-ping;CHEN Shang-nian;ZHANG Shi-hai(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410014,China;Guizhou Chuangxing Electric Power Research Institute Company Limited,Guiyang 550002,China)

机构地区：[1]长沙理工大学能源与动力工程学院,长沙410014 [2]贵州创星电力科学研究院有限责任公司,贵阳550002

出　　处：《汽轮机技术》2023年第3期207-213,共7页Turbine Technology

基　　金：国家重点研发计划(2017YFB0903600);南方电网公司重点科技项目(GZKJXM20172214)。

摘　　要：为快速、精准地确定汽轮机组碰磨故障的原因及位置,提出一种基于机组运行参数相关分析的碰磨故障诊断方法。首先,利用数据预处理方法对汽轮机组的DCS运行数据进行预处理;然后,计算并分析振动参数间、振动与过程参数间的相关性特征,根据相关性特征指标排序法确定碰磨故障原因及发生位置;第三,结合某350MW汽轮机组的碰磨故障实例对所提出的方法进行验证;最后,将诊断结果与皮尔逊相关分析方法诊断结果进行对比分析,结果表明:本文方法可以更好地挖掘出振动参数间、振动与过程参数间的线性、非线性相关性特征,可精准地确定转子碰磨故障原因及位置,能有效指导机组的故障诊断。To quickly andaccurately determine the causes and locations of rubbing fault for steam turbine unit,a rubbing fault diagnosis method based on correlation analysis of unit operating parameters is proposed in this paper.Firstly,the DCS operating data of steam turbine unit is pre-processed by using data pre-processing method;secondly,according to the correlation characteristic inex ranking method,the correlation characteristics between vibration parameters and between vibration and process parameters are calculated and analyzed to determine the cause and location of the robbing;thirdly,combined with an example of a 350MW steam turbine unit rubbing fault,the method proposed in this paper is verified.Finally,the diagnostic result obtained in this paper is compared with that obtained by Pearson's correlation analysis method.The comparison result shows that the method proposed in this paper can better explore the linear and nonlinear correlation features between vibration parameters and between vibration and processs parameters,and the causes and locations of the rubbing can be accurately determined,which can effectively guide the fault diagnosis of the units.

关 键 词：汽轮机组 碰磨 互信息 相关性分析 

分 类 号：TK268[动力工程及工程热物理—动力机械及工程]