基于反馈线性化的非线性鲁棒协调励磁控制  

Nonlinear Robust Coordinated Control of Excitation System Based on the Feedback Linearization

作　　者：李天云[1] 李慧敏[2] 于兴林[1] 陈峰[1] 朱建华[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]东北电力大学自动化工程学院,吉林吉林132012

出　　处：《电网与清洁能源》2011年第9期11-15,31,共6页Power System and Clean Energy

基　　金：国家自然科学基金资助项目(50777007)~~

摘　　要：提出了结合直接反馈线性化(DFL)和非线性鲁棒控制理论的协调励磁控制器设计方法。DFL从系统的输出方程出发,直接指定含输入量的方程为虚拟控制量,实现系统的线性化。非线性鲁棒协调控制在考虑了系统存在非线性、模型误差、不确定干扰等特点的同时,还考虑了由于负载或调速变化等因素影响时出现的发电机端电压偏移的问题,在以功角为控制目标的控制律中引入了发电机端电压反馈,从而解决了端电压可能存在的偏移问题。仿真分析显示,该控制律既能很好地提高发电机端电压控制精度,又能有效地提高发电机组的运行稳定性,并能对干扰进行有效地抑制。Combined with the direct feedback linearization （DFL） and the nonlinear robust control theory, an excitation control method is proposed in the paper. Starting from the output equation of the system, the DFL directly assigns the equation that contains the input equation as the virtual control variable. In this way, the system is converted into a linear system. The nonlinear robust coordinated control theory considers not only the nonlinearity,model error, uncertain disturbances existing in the system, but also the voltage deviation at the generator terminal attributed to tile load and/or speed regulation. As the voltage feedback at the generator terminal is introduced into the control rule which takes the angle power as the control object, it successfully solves the terminal voltage deviation problem. The simulation results show that the rule can improve characteristics of the terminal voltage and operation stability of the generator while restraining various disturbances effectively.

关 键 词：电力系统 直接反馈线性化 鲁棒协调控制 励磁 控制 

分 类 号：TM63[电气工程—电力系统及自动化]