基于自适应Backstepping设计的TCSC非线性鲁棒控制器  

Nonlinear robust control based on adaptive backstepping design for TCSC

作　　者：李文磊[1] 张智焕[1] 井元伟[2] 刘晓平[2] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《控制理论与应用》2005年第1期153-156,160,共5页Control Theory & Applications

基　　金：国家自然科学基金资助项目(69974007);浙江省教育厅基金资助项目(20040944);宁波市青年博士基金资助项目;宁波大学科研基金资助项目.

摘　　要：电力系统是强非线性的动态大系统,在运行中总要受到外部干扰和内部干扰的影响,从而对其稳定运行造成严重威胁.本文针对带有TCSC单机无穷大母线系统的三阶鲁棒模型,在考虑阻尼系数未知及系统受外部扰动的情况下,将自适应backstepping方法与非线性L2增益干扰抑制理论融合,构造出系统的存贮函数,并获得非线性自适应鲁棒控制器及参数替换律.所得控制器不仅能够保证系统状态有界,而且能够有效抑制干扰对系统输出的影响.通过对单机系统的仿真结果表明采用该方法的控制器优于传统的控制器.As nonlinear dynamic and large scale systems,electric power systems in operation are always influenced by the external and internal disturbances;and thus the serious threat to stable operation of systems exists.In this paper,based on the three-order robust models of single machine-infinite bus system with thyristor controlled series compensation (TCSC) and under the conditions that systems have unknown damping coefficient and external disturbances,the storage functions of the system are constructed by integrating nonlinear L-two gain disturbances attenuation theory smoothly into backstepping design methodology.A nonlinear adaptive robust controller and a parameter update law are obtained.The derived controller can not only ensure that the system states are bounded,but also can attenuate the influences of disturbances on system output.The simulation results on single machine suggest that the controller designed by this methodology was superior to conventional controller in performances.

关 键 词：电力系统 灵活交流输电系统 鲁棒控制 参数不确定性 自适应backstepping方法 干扰抑制 

分 类 号：TM571.6[电气工程—电器]