多机电力系统非线性鲁棒STATCOM控制器设计

Design of Nonlinear Robust Controller for Multi-Machine Power System with STATCOM

在系统受到内、外部干扰的条件下,针对含静止同步补偿器(STATCOM)的多机电力系统模型,采用改进backstepping方法、自适应控制以及滑模控制,设计一种非线性鲁棒控制器。在设计过程中,加入K类函数对backstepping方法进行改进,加快了曲线的收敛速度。针对未知的干扰上界,应用自适应控制对其进行实时估计,并引入连续滑模项对其进行抑制。最后,通过两区域四机电力系统进行仿真研究。仿真结果表明,所设计的STATCOM控制器可以提高跨区域互联电力系统的稳定性能。

For the Multi-Machine power system with STATCOM, under the condition of internal and external disturbance, a nonlinear robust controller is designed by using the improved backstepping method, adaptive control and sliding mode control. In the design process, the K-class function is added to improve the backstepping method, which accelerates the convergence speed of the curve. For the case that the upper bound of the disturbance is unknown, the adaptive control is used to estimate the adaptive law, and the continuous sliding mode term is introduced to suppress the interference. At last, simulation research was carried out through the two-area four-machine power system. The simulation results show that the designed STATCOM controller can improve the stability of the interconnected power system.