CAJ | 학술논문

对发电机定子铁芯进行模态振动试验是为了防止汽轮发电机组在运行过程中定子铁芯椭圆形模态振动频率与双倍的发电机的径向电磁力频率产生共振。目前只有各个发电机制造厂进行数值模拟和出厂前进行模态振动测试，几乎没有在电厂生产现场进行该项测试。文章通过几个典型汽轮发电机测试实例详细介绍了对于电厂停机检修机组进行发电机定子铁芯模态试验的方法及特性，提出了现场试验过程中的要点。指出发电机铁芯模态振动测试是目前发电机安全监测工作中很好的补充技术手段。
대발전궤정자철심진행모태진동시험시위료방지기륜발전궤조재운행과정중정자철심타원형모태진동빈솔여쌍배적발전궤적경향전자력빈솔산생공진。목전지유각개발전궤제조엄진행수치모의화출엄전진행모태진동측시，궤호몰유재전엄생산현장진행해항측시。문장통과궤개전형기륜발전궤측시실례상세개소료대우전엄정궤검수궤조진행발전궤정자철심모태시험적방법급특성，제출료현장시험과정중적요점。지출발전궤철심모태진동측시시목전발전궤안전감측공작중흔호적보충기술수단。
To prevent the resonance between the elliptic modal frequency of stator core and the twice fre-quency of the radial electromagnetic force in the turbo-generators operation , the modal test of the stator core of turbo-generators is necessary .A few factories of generator do some numerical simulations and sta-tor core modal test before the core leaving the factory , stator cores are little tested in the site of power plant .In this paper , through a number of examples of typical turbine power plant unit , some methods and characteristics of the modal test are introduced , and the key points in the process of field test are put forward .It is pointed out that the test of generator core vibration modal is a good method of safety supervi-sory technology of turbine-generators.