基于自抗扰控制的四象限变流器过压抑制方法  

Overvoltage Suppression Method for Four-quadrant Converter Based on Active Disturbance Rejection Control

作　　者：姚大顺 徐瑞 张林 李金池 郭洋 YAO Dashun;XU Rui;ZHANG Lin;LI Jinchi;GUO Yang(State Key Laboratory for Traction and Control System of EMU and Locomotive,Dalian Liaoning 116041,China;CRRC Dalian Electric Traction R&D Center Co.,Ltd.,Dalian Liaoning 116041,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]动车组和机车牵引与控制国家重点实验室,辽宁大连116041 [2]中车大连电力牵引研发中心有限公司,辽宁大连116041 [3]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《微电机》2022年第8期74-79,共6页Micromotors

基　　金：中国博士后科学基金特别资助项目(2020TQ0350)。

摘　　要：动车组牵引变流器中间回路过压故障会加速支撑电容、IGBT等器件的老化,影响器件的使用寿命,严重时会导致IGBT器件击穿。为了减小负载突变对中间电压的冲击,本文提出了一种基于自抗扰控制的四象限过压抑制方法。首先,对单相四象限变流器进行数学建模,分析了负载突变对中间电压的影响及传统比例-积分(PI)控制器对于负载突变抑制能力不足的原因。然后采用自抗扰控制方法设计电压环,对系统总扰动进行实时估计并采取前馈补偿的方法,解决负载突变引起的过压问题。利用Matlab/Simulink软件对两种控制方法进行离线仿真对比,采用动车组牵引控制单元和dSPACE实时硬件系统进行两种控制方法的半实物硬件在环(HIL)实验验证工作。最后仿真和实验结果表明,自抗扰电压环控制器具有更强的鲁棒性,能有效地解决因负载突变导致的中间回路过压问题。The overvoltage fault of the intermediate circuit of the traction converter of the EMU will accelerate the aging of the intermediate support capacitor,IGBT and other devices,affect the service life of the device,and cause the breakdown of the IGBT device in severe cases.In order to reduce the impact of sudden load disturbance on the intermediate voltage,this paper proposed a four-quadrant converter overvoltage suppression method based on active disturbance rejection control to improve the robustness of the four-quadrant control system.First of all,mathematical modeling of a single-phase four-quadrant converter was carried out,and the influence of load mutation disturbance on the intermediate voltage was analyzed and the reason for the insufficient suppression ability of traditional proportional-integral(PI)controller for load disturbance mutation is analyzed.Then,the auto disturbance rejection control method was adopted to design the voltage loop,the total disturbance of the system was estimated in real time and the feedforward compensation method was adopted to solve the overvoltage problem caused by the sudden change of load.Then,Matlab/Simulink software was used to conduct offline simulation comparison of the two control methods,and the hardware-in-the-loop(HIL)experimental verification of the two control methods was carried out using the EMU traction control unit and the dSPACE real-time hardware system.Finally,the simulation and experimental results show that the active disturbance rejection voltage loop controller has stronger robustness and can effectively solve the overvoltage problem of the intermediate loop caused by the sudden load change.

关 键 词：自抗扰 四象限变流器 总扰动 鲁棒性 硬件在环 

分 类 号：TM461[电气工程—电器]