3/3相双绕组发电机系统的运行稳定性

参数匹配不当的双绕组发电机系统会发生低频振荡而不能正常工作。为了对系统稳定运行的条件进行研究，在3／3相双绕组发电机系统的等效电路模型基础上，建立了该系统的线性化数学模型及相应的状态方程。使用劳斯判据得出了系统稳定运行的判据、直流侧等效动态电阻的计算公式和临界电阻的计算公式，揭示了系统“微变”稳定条件的物理实质。详细讨论了发电机参数、交轴稳定绕组及负载对系统运行稳定性的影响。实验与理论分析结果的对比说明了所建模型和分析方法的正确性。

STABILITY OF 3/3-PHASE DOUBLE WINDING GENERATOR WITH SIMULTANEOUS AC AND RECTIFIED DC LOAD

If the parameters of the 3/3-phase double winding generator and its load do not match, low-frequency oscillation will occur in the system and result in its breakdown. In order to study the conditions for the stable operation of the system, based on the equivalent models of 3/3-phase double winding generator with simultaneous AC and rectified DC load, the linearized model and the corresponding state space mathematical model are developed for the system. The criterion of operation stability for the system under small disturbance, including the formulae for calculating equivalent dynamic resistance and critical resistance, are obtained by using Routh criterion. A physical interpretation is given to the criterion of operation stability. The effects of generator parameters, quadrature-axis stability winding and load on operation stability of the system are studied in detail. The comparison between the calculated and experimental results verified the validity of the mathematical model and analytical method.