DFIG网侧逆变器改进线性自抗扰控制策略设计  

A Design of Linear Active Disturbance Rejection-Improved Control Strategy for DFIG Grid-Side Inverter

作　　者：廉小亲[1] 安飒 李震[2] LIAN Xiao-qin;AN Sa;LI Zhen(School of Computer and Information Engineering,Beijing Technology and Business University,Beijing 100048,China;School of Automation,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京工商大学计算机与信息工程学院,北京100048 [2]北京理工大学自动化学院,北京100081

出　　处：《计算机仿真》2020年第12期98-102,共5页Computer Simulation

基　　金：北京市自然科学基金面上项目(3182034)。

摘　　要：针对双馈异步发电机(Double-fed Induction Generation,DFIG)网侧逆变器的复杂性和稳定性差等弊端以及传统PI闭环控制存在稳定性差、响应速度慢等问题,提出了一种改进线性自抗扰方法的控制策略,在线性状态误差反馈控制(Linear State Error Feedback,LSEF)中加入谐振环节,取代电流环的PI控制,抑制并网电流的低次谐波,能够提高系统的响应速度,保证并网运行平稳。搭建Matlab/Simulink仿真机实验平台,验证提出的控制策略在网侧逆变器并网的有效性和可行性。上述方法的仿真验结果表明,其具有良好的鲁棒性和动态性能,保证直流电容电压稳定,有效降低并网电流畸变率,具有更好的控制效果,确保并网点系统稳定运行。Generally,the grid side inverter of doubly fed induction generator(Double-fed Induction Genera-tion,DFIG)has defects,such as complexity and poor stability,as well as poor stability and slow response speed of PI closed-loop control.Therefore,this paper puts forward a control strategy of improved linear active disturbance rejection method.In the linear state error feedback(Linear State Error Feedback,LSEF),the resonance link was introduced to replace the PI control of the current loop,and the low order harmonics of the grid connected current were suppressed,improving the response speed of the system and ensuring the stable grid connected operation.The MATLAB/Simulink simulation platform was established to verify the effectiveness and feasibility of the strategy de-signed in this paper.The results show that the strategy designed in this paper has excellent robustness,dynamic per-formance and control effect,which ensures the stability of DC capacitor voltage and reduce the distortion rate of grid connected current,thus guaranteeing the stable operation of the grid connection point system.

关 键 词：双馈异步发电机 网侧逆变器 改进线性自抗扰控制 谐波抑制 

分 类 号：TM743[电气工程—电力系统及自动化]