【摘要】 计及磁路饱和,同步发电机自励磁方式的电压、电流为有限值,其数值可以计算。在自励磁程度较轻,即输电系统等值容抗 x。比发电机非饱和同步电抗 x_d 小得不多时,电压、电流并不大。本文讨论了发电机同步自励磁和异步自励磁的物理过程并提出自励磁电压的计算方法。用所提出的方法计算了单机和两机系统的自励磁电压,并与动模试验结果作了比较;两者相当接近,表明提出的方法是可行的。更多还原

【Abstract】 Owing to magnetic saturation,the voltage and current of the synchronous gene-rator in self-excitation are limited in magnitude.With a slight degree of self-excitation,that is,when the equivalent capacitive reactance Xc of the transmission system isslightly smaller than the unsaturated synchronous reactance Xd of the generator,themagnitudes of the voltage and current are not very large.In this paper,the physicalessence of the synchronous and asynchronous self-excitation is discussed.Also,a me-thod for calculating the self-excitation voltage of the synchronous generator is presented.With this method,the self-excitation voltages of one-machine and two-machine sys-tems are calculated and compared with the test results of model systems in the labora-tory of dynamic models of electric power system.The differences are small.Therefore,the method proposed can be applied to engineering purposes.更多还原