基于扰动观测器-Lyapunov理论的稳压控制策略  

A Voltage Control Method of Disturbance Observer Based-Lyapunov Theory

作　　者：张泽宇 宫萍萍[1] 郭华杰 卢子广[1] ZHANG Ze-yu;GONG Ping-ping;GUO Hua-jie;LU Zi-guang(Guangxi University,Nanning 530004,China;不详)

机构地区：[1]广西大学,电气工程学院,广西南宁530004 [2]广西水利电力职业技术学院,水利电力工程系,广西南宁530023

出　　处：《电力电子技术》2024年第5期40-43,共4页Power Electronics

基　　金：广西壮族自治区自然科学基金(2018GXNSFDA-138008)。

摘　　要：针对小型风力自励异步发电机(SEICG)机端电压在投切负载时产生电压跌落的问题,通过并联静止无功补偿器(STATCOM)提高异SEIG的机端特性,改善电能质量。提出一种基于扰动观测器(DOB)的Lyapunov(DOB-Lyapunov)控制策略,通过数学模型构造Lyapunov函数,将误差跟踪问题转换成求解Lyapunov函数在平衡点全局渐近稳定问题;针对线路电感测量误差及摄动对控制策略造成影响,内环加入DOB,使得整个控制器在鲁棒性、静态稳定性方面得到提升。结果表明:所提DOB-Lyapunov方法可以在线路阻抗发生变化时仍有较好的控制性能,电压平方外环结构实现了线性化电压控制,在响应速度以及总谐波畸变率(THD)方面均优于传统方法。To deal with the voltage drop of small wind self-excited induction generator(SEIG)when the loads are injected,static synchronous compensator(STATCOM)is used to improve the terminal characteristics of SEIG and improve the power quality.A disturbance observer based(DOB)-Lyapunov(DOB-Lyapunov)theory is used to design voltage controller based on physical models.A Lyapunov function from the mathematical model are constructed,transforming the error tracking problem into solving the global asymptotic stability problem of the Lyapunov function at the equilibrium point.In order to reduce the impact of line inductance measurement error and perturbations on the control strategy,a DOB is added to the current inner loop,which improves the robustness and static stability of the entire controller.The results show that the DOB-Lyapunov strategy can stll have good control performance when the line impedance changes,and the voltage square outer loop structure realizes the linearized voltage control,which is superior to the traditional method in response speed and total harmonic distortion(THD).

关 键 词：自励异步发电机 静止无功补偿器 扰动观测器 

分 类 号：TM315[电气工程—电机]