大功率电力机车辅助变流器调制切换策略研究  

Study on Modulation Switching Strategy of Auxiliary Converter for High-power Electric Locomotive

作　　者：张宇龙 葸代其 张瑞峰 詹哲军[1] ZHANG Yu-long;XI Dai-qi;ZHANG Rui-feng;ZHAN Zhe-jun(Technical Center,CRRC Yongji Electric Co.,Ltd.,Xi’an 710016,China)

机构地区：[1]中车永济电机有限公司技术中心,陕西西安710016 [2]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《电力电子技术》2021年第6期109-111,共3页Power Electronics

基　　金：中国中车重点项目(2018CYB120);中国中车重大项目(2020CTA098)。

摘　　要：在大功率电力机车辅助变流器的应用中,由于受到输出电压总谐波畸变率(THD)总量要求及开关频率的制约,在额定输出时常采用特定谐波消除脉宽调制(SHEPWM)方式;对电力机车大功率辅助变流器常用的SHEPWM进行了详细分析,并针对双极性电压型逆变器建立数学模型;介绍了常用的特定消谐方程组开关角解法及开关角的高阶多项式拟合方法;同时详细介绍了一种电力机车大功率辅助变流器的调制波切换策略,通过实验验证了所述切换策略的正确性及可行性。In the application of the auxiliary converter for high-power electric locomotive,due to the restriction of the total amount of output voltage total harmonic distortion(THD)and the switching frequency,the rated output usually adopts the selective harmonic elimination pulse width modulation(SHEPWM)mode.A detailed analysis of the SHEPWM commonly used in high-power electric locomotive auxiliary converters is made and a mathematical model for the bipolar voltage inverter is established.The solution method of the switching angle equation and the polynomial fitting method of the switching angle are introduced.At the same time,a modulation wave switching strategy for the auxiliary converter of electric locomotive is introduced in detail.

关 键 词：变流器 特定谐波消除脉宽调制 大功率 

分 类 号：TM46[电气工程—电器]