一种基于阻抗重构的城市轨道交通牵引系统直流侧振荡抑制方法  

A Method of Impedance Reconstruction Based DC-link Oscillation Suppression for Urban Rail Transit Traction System

作　　者：李婷婷 孙伟鑫 刘川 蒲俊楷 葛兴来[2] LI Tingting;SUN Weixin;LIU Chuan;PU Junkai;GE Xinglai(Chengdu Yunda Technology Co.,Ltd.,Chengdu,Sichuan 610097,China;Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]成都运达科技股份有限公司,四川成都610097 [2]西南交通大学磁浮技术与磁浮列车教育部重点实验室,四川成都610031

出　　处：《控制与信息技术》2021年第2期49-55,共7页CONTROL AND INFORMATION TECHNOLOGY

基　　金：国家自然科学基金项目(51677156)。

摘　　要：由于主电路参数失配以及逆变器-电机系统在特定工况下存在的负阻抗特性,城市轨道交通牵引系统容易发生直流侧母线电压振荡的现象。为解决此问题,文章建立了牵引系统的特征方程模型,分析了直流侧滤波参数对系统稳定性的影响。针对逆变器-电机驱动系统,提出了一种基于阻抗重构的振荡抑制方法。其通过补偿控制器输出的d轴和q轴参考电压信号,改善了逆变器-电机系统的负阻抗特性,从而使系统稳定运行。仿真与硬件在环实验结果表明,采用该抑制策略可有效抑制直流侧母线电压振荡,从而提高系统的稳定性。Due to the mismatch of main circuit parameters and the negative impedance characteristics of inverter-motor system under specific operating conditions,urban rail transit traction system is prone to DC-link voltage oscillation.In order to solve this problem,this paper establishes a characteristic equation model of traction system,and analyzes the influence of DC-link filter parameters on system stability.For inverter-motor drive system,it proposes an oscillation suppression method based on impedance reconstruction.By compensating d axis and q axis reference voltage signal of controller,negative impedance characteristic of the inverter-motor system is improved so that the system is stable.Simulation and hardware-in-the-loop experiment results show that the suppression strategy can effectively suppress the oscillation and improve the stability of system.

关 键 词：阻抗重构 振荡抑制 牵引系统 电压失稳 

分 类 号：TM461[电气工程—电器]