交流励磁发电机静态稳定性分析

转速可变是交流励磁发电机与传统同步发电机最根本的区别。文中从交流励磁发电机的数学模型出发，揭示了其在任一转速下的静态稳定规律：工作区域内，在不考虑控制策略的情况下交流励磁发电机的静态稳定性随转速下降而降低；采用自动励磁调节器，按机端电压偏移量调节励磁电压，可以使交流励磁发电机在不同转速下保持基本相同的静态稳定性。这一规律通过试验得到了验证，为交流励磁发电机实际运行时运行方式的选择提供了依据。

ANALYSIS ON THE STEADY-STATE STABILITY OF AC-EXCITED GENERATOR

The most significant difference between the AC-exited generator and the traditional synchronous generator is that the speed of the former is adjustable. This paper establishes the law of steady-state stability of the AC-excited generator at any speed from the mathematic model: (1) the steady-state stability is descendent in the working range as the speed descends without any control methods; (2) the steady-state stability is nearly equal at different speed considering the effect of the automatic exciting regulator. This law is tested by experiment and provides a reference for the choice of operating mode in practical operation.