基于扩张状态观测器和Terminal滑模的HVDC非线性鲁棒控制器设计  

Design of Nonlinear Robust Controller of HVDC Power Transmission System Based on Extended State Observer and Terminal Sliding Mode Control

作　　者：李天云[1] 张志华[1] 陈峰[1] 张宇辉[1] 

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012

出　　处：《电网技术》2012年第10期190-195,共6页Power System Technology

摘　　要：针对高压直流输电系统(HVDC)强非线性和模型不确定性的特点,提出了一种基于扩张状态观测器(extended stateobserver,ESO)和Terminal滑模的HVDC非线性鲁棒控制策略。首先利用Terminal滑模设计出系统的虚拟控制输入,再由ESO来估计系统的内、外扰动以及不确定因素,并将其动态补偿到系统中,设计出了整流侧定电流和逆变侧定关断角非线性控制器。仿真结果表明,与常规的PI控制器相比,该控制器表现出良好的动态性能和稳态性能,提高了系统的鲁棒性。In view of strong nonlinearity of HVDC power transmission system and uncertainty of its model,based on extended state observer（ESO） and terminal sliding model control a nonlinear robust control strategy for HVDC power transmission system was proposed.Firstly,the virtual control input of the control system was designed by terminal sliding mode;the internal and external disturbances as well as the uncertain factors were estimated by ESO and dynamically compensated to control system,and then a nonlinear constant current controller for rectifier side and a nonlinear constant extinction angle for inverter side were designed.Simulation results showed that the designed controllers possessed good dynamic and steady state performances than conventional PI controller and the robustness of control system could be improved.

关 键 词：扩张状态观测器 TERMINAL滑模控制 高压直流输电 鲁棒性 动态补偿 

分 类 号：TM72[电气工程—电力系统及自动化]