多模式调制下动车组全速域拍频抑制方法研究  

Research on Beat Suppression Method in Full Speed Domain of Electric Multiple Units with Multi-mode Modulation

作　　者：孟彤 张佳波 曾凡飞 苗存绪 陈念升 MENG Tong;ZHANG Jiabo;ZENG Fanfei;MIAO Cunxu;CHEN Niansheng(Qingdao Metro Group Co.,Ltd.,Qingdao 266101 Shandong,China;CRRC Qingdao Sifang Rolling Stock Research Institute Co.,Ltd.,Qingdao 266031 Shandong,China)

机构地区：[1]青岛地铁集团有限公司,山东青岛266101 [2]中车青岛四方车辆研究所有限公司,山东青岛266031

出　　处：《铁道机车车辆》2024年第6期103-109,共7页Railway Locomotive & Car

摘　　要：动车组牵引系统在牵引逆变器输出频率接近100 Hz时,牵引电机转矩会产生低频脉动,即拍频现象。为此,首先阐述了单相四象限整流器产生脉动电压的基本原理,分析了脉动电压对输出转矩的影响。其次针对大功率逆变器多模式调制策略,存在较大调制延时,且调制延时实时变化的问题,提出了一种采用带通滤波器的方式预测脉动电压,其中滤波器的截止频率及幅值补偿系数依据当前调制延时实时调整,调制延时则由当前调制策略实时计算。最后通过预测脉动电压值计算出频率补偿分量,注入到稳态输出频率上,以实现全速域拍频抑制。通过仿真及试验,验证了脉动电压预测的准确性及拍频抑制的有效性。When the output frequency of traction inverter of EMU traction system is close to 100Hz,the torque of traction motor will generate low-frequency pulsation,that is beat frequency phenomenon.Therefore,the basic principle of pulsatile voltage generated by single-phase four-quadrant rectifier was described,and the influence of pulsating voltage on output torque was analyzed.Secondly,aiming at the problem of large modulation delay and real-time change of modulation delay in multi-mode modulation strategy of highpower inverter,a bandpass filter method was proposed to predict the pulsatile voltage.The cut-off frequency and amplitude compensation coefficient of the filter were adjusted in real time according to the current modulation delay which was calculated in real time by the current modulation strategy.Finally,the frequency compensation component was calculated by predicting the pulsatile voltage value and injected into the steady-state output frequency to achieve beat suppression in the full speed domain.The accuracy of pulsatile voltage prediction and the effectiveness of beat suppression were verified by simulation and experiment.

关 键 词：多模式调制 调制延时 带通滤波器 动车组 拍频抑制 

分 类 号：U266[机械工程—车辆工程]