基于三相四线制DSTATCOM的新型线性自抗扰控制策略  

Novel linear active disturbance rejection control strategy for three-phase four-wire DSTATCOM

作　　者：马幼捷[1] 姜欣宇 周雪松[1] Ma Youjie;Jiang Xinyu;Zhou Xuesong(School of Electrical Engineering and Automation,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学电气工程与自动化学院,天津300384

出　　处：《电子测量技术》2021年第16期23-30,共8页Electronic Measurement Technology

基　　金：国家自然科学基金(51877152)项目资助。

摘　　要：针对三相四线制配电网静止同步补偿器(DSTATCOM)对不平衡负载的无功电流以及不平衡电流补偿速度与补偿精度不足的现象。首先建立四线制DSTATCOM数学模型,然后完成新型线性自抗扰控制(LADRC)的设计,并将新型控制器应用于电流内环以快速跟踪指令电流信号,通过经典控制理论以及数学理论分析其抗扰性、跟踪性、稳定性,最后通过Matlab/Simulink仿真平台搭建传统LADRC与新型LADRC下三相四线制DSTSTACOM系统模型进行仿真实验,结果显示新型控制器作用下系统功率因数更接近1、中线电流更接近0且响应曲线更快,表明新型LADRC下的四线制DSTATCOM具有更加良好的补偿速度及精度。In view of the phenomenon that the distributed static synchronous compensator(DSTATCOM)is insufficient in compensating the reactive current of the unbalanced load and the compensation speed and accuracy of the unbalanced current in the three-phase four-wire distribution network.Firstly,the four-wire DSTATCOM mathematical model is established,then the design of a new linear active disturbance rejection controller(LADRC)is completed,and the new controller is applied to the current inner loop to quickly track the command current signal.The disturbance immunity,tracking and stability were analyzed by classical control theory and mathematical theory.Finally,the three-phase four-wire DSTSTACOM system model under the traditional and new LADRC is built through the MATLAB/Simulink simulation platform for simulation experiments.The results show that under the action of the new controller,the power factor of the system is closer to 1,the midline current is closer to 0 and the response curve is faster,indicating that the four-wire DSTATCOM under the new LADRC has better compensation speed and accuracy.

关 键 词：三相四线制 静止同步补偿器 线性自抗扰控制 非平衡负载 

分 类 号：TM464[电气工程—电器]