机械功率对电力系统稳定性的影响

The Impact of Mechanical Power on Power System Stability

从摆方程出发,借助能量法和相平面分析方法对电力系统的稳定性进行讨论。结果表明,当机械功率比较小的时候,系统的稳定性不受影响;当机械功率比较大时系统的不稳定性开始凸现,机械功率越大系统越不稳定。当机械功率等于电磁功率时,系统处于临界状态。系统的临界状态与系统参数有关,只需适当调节这些参数就可以保证系统是稳定的。

The paper discussed the stability of power systems by using the energy method and phase plane analysis method from the pendulum equation. The results show that when the mechanical power is relatively small, the stability of the system is not affected ; when mechanical power is large, the instability of the system has become distinct, and the larger mechanical power is, the more instability. When mechanical power is equal to the electromagnetic power, the system is in critical condition. The critical condition of the systems is related to system parameters, just adjusting appropriately these parameters so as to ensure stabilities of the system.