机电复合故障下汽轮发电机转子振动特性分析  

Analysis of Turbine Generator Rotor Vibration Characterisitc Under Electromechanical Compound Faults

作　　者：武玉才[1] 李永刚[1] 李和明[1] 万书亭[2] 纪璇[1] 

机构地区：[1]华北电力大学电气与电子工程学院,保定071003 [2]华北电力大学能源与动力工程学院,保定071003

出　　处：《高电压技术》2010年第11期2687-2692,共6页High Voltage Engineering

基　　金：国家自然科学基金(50677017);教育部博士点基金(20060079007)~~

摘　　要：针对汽轮发电机机械、电气故障间的交叉影响,采用气隙磁导法建立了发电机气隙磁场模型,分析了多种故障引起的作用于转子的不平衡力以及机电复合故障状态下的转子振动特征。数值仿真表明:转子绕组匝间短路故障与转子基频振动幅值间并不是单一的对应关系。最终得出结论:同时参考振幅和相位信息诊断转子绕组匝间短路故障有助于提高诊断转子绕组匝间短路故障的灵敏性和可靠性。Aiming at the interaction between turbine generator mechanical and electrical faults,we have established a generator magnetic field model adopting air-gap conductance method.The unbalanced forces acting on the rotor caused by each faults are analyzed,and the rotor vibration characteristic under mechanical and electric compound faults are also analyzed.Numerical simulations show that the correlation between rotor winding inter-turn short circuit fault and rotor fundamental frequency vibration amplitude is not single.The conclusion can be drawn that simultaneously considering amplitude and angle is helpful to improving the sensitivity and reliability for rotor windings inter-turn short circuit fault detection.

关 键 词：质量不平衡 动偏心 转子绕组匝间短路 不平衡力 幅值 相位 

分 类 号：TM311[电气工程—电机]