凸极同步发电机定子内部故障的暂态规律探讨

为了准确评价和在实际中选用适当的保护方案，需要揭示凸极同步发电机定子绕组内部故障的瞬态运行特征及瞬态过程中各个故障量的变化规律。文中通过真机实验，验证了以多回路理论为依据编制的凸极同步发电机定子绕组内部故障仿真程序的正确性。依据该仿真程序的计算结果，对空载下发生绕组匝间内部故障时的电流瞬态量和稳态量的变化规律进行了探讨，说明绕组的空间分布、连接方式、发生故障的空间位置以及不同的故障瞬间对故障量都有影响，因此要综合考虑这些因素的作用。

DISCUSSION ON THE TRANSIENT REGULARITIES OF STATOR INTERNAL FAULTS IN SALIENT-POLE SYNCHRONOUS MACHINE

In order to evaluate accurately the different protection schem es and select the suitable ones,it is necessary to discover the transient characteristics and the variational regularities of the transient values in the salient- pole synchronous machine under internal faults.The sim ulation program of internal faults in salient- pole synchronous machine based on the multi- loop method is verified by means of experiments.According to the simulation results,the variational regularities of transient and steady- state fault currents under no- load condition are discussed.And itis found that the space distribution and the connection pattern of the windings,the location where the internal faults occur,as well as the instant of occurring the short- circuit all have an effect on the values of the fault currents and voltages.All the above factors are to be considered carefully.