水轮发电机的自励磁仿真

现代电力系统的容量、电压、长度不断增加，同步发电机就可能因电枢反应的助磁作用而发生定子电流和电压自发地增大，形成自励磁。自励磁条件和自励磁暂太虽研究自励磁的两个方面，目前，自磁条件是在一定假设条件下的解析式，而研究自励磁态过程是采用线性模型。文中采用数字法提出了自励磁的产生条件，并在水轮发电机饱和模型的基础上，仿真研究了超高压，长线路中水轮发电机的电磁量对自励磁的影响，为电机设计及运行提供了理论依

Self Excitation Simulation for Hydro-Synchronous Generators

The capacity,voltage,and length of modern electric power system are increasing ceaselessly.Synchronous generators will cause self excitation with the help of armature reaction,its stator current and voltage will increase.The self excitation conditions and the transient process are two aspects for studying self excitation.Now,self excitation conditions are mathematical formulas under certain postulate.The model of transient process of self excitation is linear.The conditions of self excitation are presented based on simulation,and the results of self excitation effected by the electromagnetic parameters of hydro generators operating extra high voltage long transmission line are simulated,based on a saturation model of hydro generators.The conclusions are very helpful for operation and design of hydro generators.