多区域互联电力系统静止同步串联补偿器自适应反步滑模控制器设计

Adaptive Backstepping Sliding Mode Controller Design for Multi-Region Interconnected Power System With SSSC

针对含静止同步串联补偿器(static synchronous series compensator,SSSC)的多区域互联电力系统,基于反步法,进一步应用自适应控制以及滑模控制中的指数趋近律,设计了含SSSC的非线性控制律。首先,建立了含SSSC的两区域互联电力系统模型,将其简化为两机系统进行研究。其次,引入非线性阻尼算法(nonlinear damping algorithm,NDA)改进反步法,减小了'计算膨胀'问题,设计过程简单可行,并且闭环系统仍然是渐近稳定的;另外,对不确定参数设计了自适应律,并引入指数趋近律设计了反馈控制律,增强了SSSC控制器的鲁棒性。最后,使用MATLAB软件,对含SSSC的两区域四机系统进行研究。仿真结果表明文中提出的控制策略是可行的,并且优于传统的反步法。

Based on back stepping method,a nonlinear control rule for static synchronous series compensator(SSSC)is designed for multi-machine power system with SSSC,using ulteriorly adaptive control and exponential approximation law in sliding mode control.Firstly,a model of two-area interconnected power system with SSSC is established,as a simplified two-machine system.Secondly,nonlinear damping algorithm(NDA)is adopted to improve the backstepping method to diminish calculation expansion problem.The design process is simple and feasible,and the closed loop system is still asymptotically stable.In addition,an adaptive law is designed for the uncertain parameters,and the exponential approximation law is used to design feedback control law,to enhance robustness of the SSSC controller.Finally,a two-area four-machine system with SSSC is studied,on MATLAB simulation platform.Simulation results show that the control strategy proposed in this paper is feasible and superior to traditional backstep method.