发电机励磁和SVC改进backstepping协调无源控制

摘要

基于改进backstepping方法和无源性理论研究了电力系统发电机励磁系统和静止无功补偿器的协调控制器设计问题。在设计过程中，没有对系统进行线性化，保留了电力系统的非线性特征，同时也考虑了电气阻尼系数不确定性问题。整个设计过程分两步完成：首先，在backstepping设计方法的基础上加入了k类函数，对无励磁控制系统 SVC 调节器的控制输入进行设计；然后，利用协调无源性方法，对发电机励磁控制电压进行控制器设计。从而保证整个系统功角和电压的双重稳定。最后，通过matlab仿真来验证所设计的协调控制器的有效性。%The paper researches a problem which is aimed at designing a coordinated controller for SVC and generator excitation of the power systems basedon the improved backstepping technique and passivity theory. In the design process, there is no linearization in order to retain the non-linear characteristics of the power system, while the uncertainty of the electrical damping parameter is taken into account. The control process is completed in two steps: Firstly, the class-kfunction is added into the backstepping method, and a non-excitation control system’s SVCcontroller is designed. Then, an excitation controller is designed by using a coordinated passivity approach. Thus, the stability of the overall system’s angle and frequency is ensured. Finally, according to the MATLAB simulated results, the effectiveness of the control method of the power system is proved.