电气工程学报

电气工程学报 ›› 2017, Vol. 12 ›› Issue (2): 8-14.doi: 10.11985/2017.02.002

• 理论研究 • 上一篇    下一篇

脉冲直流环节高频链辅助逆变器与SRSPWM混合调制研究

常玉洁1,周朝阳2,杨春4,李雪飞3,杜会卿4   

  1. 1. 北京交通大学电气工程学院北京 100044
    2. 国网天津市电力有限公司天津 300010
    3. 中车长春轨道客车股份有限公司长春 130062
  • 收稿日期:2016-04-26 出版日期:2017-02-15 发布日期:2020-04-11
  • 作者简介:常玉洁,女 1993年生,硕士,研究方向为电力电子与电力传动.|周朝阳,女 1991年生,硕士,研究方向为城轨列车辅助逆变器及其控制。

High-Frequency Auxiliary Inverter With Pulsating DC Link and Study of SRSPWM Method

Yujie Chang1,Zhaoyang Zhou2,Chun Yang4,Xuefei Li3,Huiqing Du4   

  1. 1. Beijing Jiaotong University Beijing 100044 China
    2. State Grid Tianjin Electric Power Co.,Ltd. Tianjin 300010 China
    3. CRRC Changchun in Railway Vehicle Co.,Ltd. Changchun 130062 China
  • Received:2016-04-26 Online:2017-02-15 Published:2020-04-11

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摘要：

为保证脉冲直流环节高频链辅助逆变器较高的输出电压质量,引进 SRSPWM混合调制策略。该调制前级采用移相控制方式,而移相角度由6脉波与三角载波的占空比决定;后级实现对前级的解调,但在一个基波周期内仅有1/3周期处于调制状态,与传统SPWM调制相比大大减小了开关损耗。通过数学推导验证了该调制方法的可行性,最后对该混合调制策略进行了仿真与实验验证。

关键词: 脉冲直流环节高频链辅助逆变器, SRSPWM混合调制, 谐波分析, 输出LC滤波器

Abstract:

In order to ensure high-frequency auxiliary inverter with the high quality of the output voltage, the single-reference six-pulse width modulation (SRSPWM) hybrid modulation strategy is introduced in the paper. The before class adopts phase-shift PWM modulation that the shift angle decided by the duty ratio of six pulse and triangular while the after class realizes the demodulation that only one-third of a fundamental cycle is in modulation condition and this can reduce the switching loss greatly compared with the traditional SPWM modulation using SRSPWM modulation strategy. The feasibility of the modulation method is verified by mathematical deduction, and the hybrid modulation strategy is verified through simulations and experiments.

Key words: High-frequency auxiliary inverter with pulsating DC link, single-reference six-pulse width modulation (SRSPWM), harmonic analysis, output LC filter

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