电力牵引变流器无拍频控制算法研究  

An Algorithm Research on Beatless Frequency Control for Electric Traction Converter

作　　者：兰雪艳 赵卫 Lan Xueyan;Zhao Wei

机构地区：[1]中国铁路济南局集团有限公司济南电务段 [2]中国铁路济南局集团有限公司济南西机务段

出　　处：《变频器世界》2018年第9期89-93,共5页The World of Inverters

摘　　要：电力牵引变流器作为电力牵引传动系统的核心部分,由于铁路单相供电的特性,中间直流环节会产生二次脉动电压,二次脉动电压会造成牵引电机的拍频现象,为抑制拍频现象,本文分析产生拍频现象的原因及影响,在SVPWM的无拍频控制的基础上,讨论采样延时和PWM更新对无拍频控制的影响,基于伏秒平衡原理,提出了周期预测无拍频控制算法,采用陷波器与低通滤波器组合的方法提取直流侧电压中的直流量。并通过对比仿真实验进行验证。Electric traction converter as the core part of the electric traction drive system,due to the characteristics of single-phase power supply,the secondary DC link will produce secondary ripple voltage,the second pulse voltage will cause traction motor beat phenomenon,in order to suppress the beat frequency phenomenon This paper analyzes the causes and effects of the beat frequency phenomenon.On the basis of SVPWM's no-beat control,the influence of sampling delay and PWM update on the beatless frequency control is discussed.Based on the volt-second balance principle,Frequency control algorithm,the combination of notch filter and low-pass filter method to extract the DC side of the DC voltage.And verified by comparative simulation experiments.

关 键 词：牵引系统 SVPWM 无拍频控制 延时滞后 陷波器 

分 类 号：TM4[电气工程—电器]