动态不确定发电机系统的小增益控制

Small-gain control of generator system with dynamic uncertainties

对于包含动态不确定的发电机系统,运用Backstepping方法和小增益相结合的设计方法,设计了发电机系统的非线性控制器,使其达到功角和输出电压的稳定性。采用改进的Backstepping方法设计励磁控制输入,通过小增益方法对动态不确定部分加以控制,使得整个系统达到渐近稳定。仿真结果验证了该设计方法不仅保证了功角、转子角速度和输出电压的稳定性,而且对于动态不确定部分实现了有效控制,说明了设计思想正确、控制方案有效。

A nonlinear controller for generator system with dynamic uncertainties is proposed to make rotor angle and voltage stable by combining backstepping techniques and small-gain theorem. Excitation control is achieved by the modified backstepping techniques and dynamic uncertainties are controlled based on small-gain method, which render the closed-loop system asymptotically stable. Simulations have shown this design method not only makes power angle, rotor angle speed and output voltage stable, but also reject the dynamic uncertainties effectively. The validity of thedesign idea and the effectiveness of the control law are proved.