基于变指数滑模的双馈水电机组功率控制研究  

Research on Power Control of Hydroelectric Generating Units with Doubly Fed Induction Generators Based on Variable Exponential Sliding Mode Control

作　　者：林增健 刘文泽[1] 谭炜豪 LIN Zengjian;LIU Wenze;TAN Weihao(School of Electric Power Engineering,South China Univ.of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广州510640

出　　处：《三峡大学学报（自然科学版）》2021年第6期81-86,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：广东省重点研发计划项目(2019B111109002)。

摘　　要：针对双馈水电机组系统参数具有时变和强耦合的特点,为解决传统PI控制易受参数变化与外界扰动影响,以及削弱滑模控制存在的抖振问题,在指数趋近律的基础上改进控制规律,提出了双馈水轮发电机系统的变指数趋近律滑模控制的功率解耦控制方法.该控制方法将转子电流误差作为状态变量,根据状态变量实时改变趋近律中的增益,具有响应快速、对系统参数变化和外界扰动不敏感的特点,能有效削弱传统滑模控制的抖振现象.仿真实验结果表明:所提的控制方法与传统PI控制、传统指数趋近律的滑模控制相比,具有响应快速、超调量小、鲁棒性强和抖振不明显的优点,在系统的暂态和稳态方面都具有良好的性能.In view of the various time and strong coupling characteristics of the system parameters in the doubly fed hydropower units,the power decoupling control method of the variable exponential reaching law sliding mode control for the doubly fed hydropower system is proposed based on the improved control law of the exponential reaching law in order to solve the problem that the traditional PI control is easily affected by the parameter changes and external disturbances,and the chattering problem of the sliding mode control is weakened.The control method takes the current error of the rotor as the state variable,and changes the gain of the reaching law according to the state variable in real time.It has the characteristics of fast response,insensitive to the changes of system parameters and external disturbances.Also,it can effectively reduce the chattering phenomenon of the traditional sliding mode control.The simulations show that the proposed control method has the advantages of fast response,small overshoot,strong robustness and unobvious chattering,compared with the traditional PI control and sliding mode control of traditional exponential reaching law.Meanwhile,it has better performance in both transient-state and steady-state of the system.

关 键 词：双馈发电机 水轮机 滑模控制 趋近律 功率解耦控制 

分 类 号：TM312[电气工程—电机]