摘要
研究静止同步补偿器(STATCOM)的非线性控制设计问题,建立STATCOM的动态数学模型。为消去模型中的非线性,引入基于坐标变换和状态反馈的微分几何方法。考虑到系统中存在不确定因素,所得到的模型为一个含有扰动项的不确定线性系统。利用自抗扰控制技术(ADRC)中的扩张状态观测器(ESO)观测该模型并消除其扰动,通过反馈将其线性化。结合微分几何方法中的状态反馈,得到原系统的非线性控制器。仿真结果表明,所设计的控制器具有良好的电压调节能力。
A nonlinear control for a STATCOM （Static Synchronous Compensator）was studied, At first, the dynamic mathematical model was established. In order to eliminate the non-linearity of the model, the differential geometry method based on coordinate transformation and state feedback was introduced. Furthermore, the uncertain factors of the system were considered and a linear system model with disturbance terms was obtained. For the system model above, theESO （ExtendedStateObserver）inADRC （Active Disturbance Rejection Control）was used to estimate and eliminate disturbance by feedback. Combined with the state feedback given by differential geometry method, the nonlinear controller was got for the original model. Finally, the simulation results show that the controller can achieve good voltage regulation.
出处
《中国电力》
CSCD
北大核心
2008年第11期14-18,共5页
Electric Power
基金
国家"九五"重点科技攻关项目(96-A19-05-02)
天津市重点科技攻关项目(033186611)
