基于交流跟踪的同步发电机最优励磁控制技术研究

针对同步发电机采用传统PID控制不能很好地满足电力系统对抑制振荡、提高动态稳定极限等方面要求的问题,提出了一种基于交流跟踪的同步发电机最优励磁控制方法;给出了基于拉格朗日方法的同步发电机励磁系统偏差线性化模型,分析了最优励磁控制量的确定方法,建立了基于最优励磁控制方法的同步发电机系统仿真模型。仿真结果表明,与传统PID控制方法相比,最优励磁控制方法能够实时控制同步发电机励磁系统,确保了同步发电机的输出稳定性。

Research of the optimal excitation control technology for synchronous generator based on AC tracking

In view of problem that traditional PID control for synchronous generator cannot meet with requirements of oscillation suppression and improvement of dynamic stability limit of power system,the paper proposed the optimal excitation control method for synchronous generator based on AC tracking.It gave deviation and linearization model of excitation system of synchronous generator based on Lagrange method,analyzed definition method of the optimal excitation control quantity and built simulation model of synchronous generator system based on the control method.The simulation result showed that the control method can real-timely control excitation system of synchronous generator to ensure output stability of synchronous generator comparing with traditional PID control method.