同步电机自励磁状态空间分析

Analyzing the Self-excitation of Synchronous Machine with state-Space Method

简略介绍了自励孩的经典分析法，提出了状态空间法分析自励磁的新方法。综合考虑电机各绕组及输电系统的电阻、同一轴向统组间互感不相等、阻尼绕组的作用、励磁调节等因素，建立自励磁状态方程，计算状态方程系数矩阵特征值以判断自励是否发生，提出了算法和框图；并以300MW同步发电机为例进行了计算。

Classic method to analyze self-excitahon is briefly introduced. A new approach to analyze self-excitation with state-space method is presented. State equations for self-excitation are established, taking various factors into account, for example, the resistance of different windings and transmitting system, the inequality of the mutual inductance between different windings along the same same axis, the function of damping winding and excitation adjustment, etc. Hence the eigenvalue of the coefficient matrix is calculated to judge whether self-excitation occurs. Calculation method and fare are presented. A calculation example of a 300MW synchronous machine is given.