摘要
为实现轨道车辆牵引传动系统的小型化和轻量化,同时降低车辆高速运行时传统变流器开关频率过低导致的电机电流畸变,提出一种基于碳化硅(SiC)的电力电子变压器——正弦波牵引逆变器一体化变流器系统。分别给出基于SiC器件的系统实现方案、高频大功率高绝缘耐压磁隔离设计方案,并通过仿真分析该系统的输入输出特性。结果表明,该系统在额定功率3.25 MVA运行时,输入电流总谐波畸变率(THD)低于1%,功率因数大于0.99,输出电压总谐波畸变率(THD)低于3.50%;系统效率大于97.5%,相比传统牵引传动系统效率提高3%~5%。
In order to realize the miniaturization and lightweight of the traction drive system of rail vehicles,and to reduce the motor current distortion caused by the low switching frequency of the traditional converter when the vehicle is running at high speed,an integrated converter system of power electronic transformer and sine wave traction inverter based on silicon carbide(SiC)is proposed.The realization scheme of the system based on SiC device and the design scheme of high frequency,high power and high insulation voltage magnetic isolation are given respectively,and the input and output characteristics of the system are analyzed by simulation.The results show that when the rated power is 3.25 MVA,the total harmonic distortion(THD)of the input current is less than 1%,the power factor is more than 0.99,the output voltage THD is less than 3.50%,and the system efficiency is more than 97.5%,which is 3%~5%higher than that of the traditional traction drive system.
出处
《科技创新与应用》
2023年第28期28-31,共4页
Technology Innovation and Application
基金
山东省重点研发计划(重大科技创新工程)(2020CXGC010202)
超高速磁浮交通技术路径战略研究(2022-XBZD-20-02)。
关键词
碳化硅
电力电子变压器
正弦波牵引逆变器
谐振变换器
软开关
silicon carbide
power electronic transformer
sinusoidal traction inverter
resonant converter
soft switching
