【作者】 戈宝军； 刘健嵩；

【Author】 GE Baojun;LIU Jiansong;Harbin University of Science and Technology;

【机构】 哈尔滨理工大学；

【摘要】 现有的关于励磁绕组短路故障的研究主要是针对定子绕组和励磁绕组,对阻尼绕组在这个过程中的影响研究不多。而目前测量阻尼绕组电流已经可以实现。为了明确阻尼绕组在该故障过程中电流的分布规律,进而为阻尼绕组的设计与电机运行提供参考,本文利用Ansys软件建立了参数化的水轮发电机有限元模型。用该模型对励磁绕组不同匝数的短路故障进行仿真,得到短路后定、转子绕组电气量。并以其中一根阻尼条为例,将不同匝数短路故障后电流的变化进行对比。得到了阻尼绕组电流与励磁绕组短路故障的作用规律,为励磁绕组短路故障监测提供了新的途径。更多还原

【Abstract】 Now available study about excitation windings inter-turn short circuit major aims at stator windings and excitation windings,but studies very little about the effect of damping winding current in this process.However,measuring damping winding current has been realized now.In order to define the distribution rule of damping winding current with the fault,a parameterized finite element model of hydro-generator is built by Ansys in this paper.The excitation windings short circuit fault with different number of turns is simulated with this model and get electric parameters of stator winding and rotor winding after short circuit fault.Meanwhile one damping bar is taken as an example,compare with the change of current after the short circuit fault with different number of turns.The function rule of damping winding current and excitation windings short circuit fault is got and develop a new short circuit protection pattern will be possible.更多还原