电工技术学报  2019, Vol. 34 Issue (8): 1677-1688    DOI: 10.19595/j.cnki.1000-6753.tces.180288
电力电子 |
一种改善Vienna整流器输入电流品质的载波钳位调制方法
朱文杰, 陈昌松, 段善旭
华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室 武汉 430074
A Carrier-Based Modulation Method with Clamped Area for Input Current Performance of Vienna Rectifier
Zhu Wenjie, Chen Changsong, Duan Shanxu
State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Huazhong University of Science and Technology Wuhan 430074 China
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摘要 三相三电平Vienna整流器具有输入电流总谐波畸变率(THD)低、功率密度高、单位功率因数等优点,适用于高频三相功率因数校正场合。在器件开关暂态过程中,Vienna整流器的寄生电容和缓冲电路等非线性因素会造成交流侧端电压误差,给输入电流引入低频谐波,从而影响电流品质。为此,本文提出一种改善Vienna整流器输入电流品质的载波钳位调制方法,该方法考虑Vienna整流器电路非线性因素,对开关暂态过程和端电压误差进行分析,在电流过零时将端电压钳位到零电平,且可调节钳位区间大小,有效降低了端电压误差,提高了输入电流品质。通过仿真和实验对所提载波钳位调制方法和常规SPWM方法进行比较,结果表明:所提方法能在宽负载范围下降低输入电流低频谐波分量和总电流畸变率,验证了所提载波钳位调制方法的正确性和可行性。
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朱文杰
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关键词 Vienna整流器端电压误差载波调制钳位区间    
Abstract:The three-phase three-level Vienna rectifier is a very suitable power factor converter (PFC) because of its low total harmonic distortion (THD) of input current, high power density and unity power factor. However, during the transient turn-on/off progress, the nonlinear factors, such as snubber circuit and parasitic capacitance, will cause terminal voltage error and distort input current. Therefore, this paper proposed a carrier-based pulse-width modulation (CB-PWM) with clamped area. Considering the nonlinearity of Vienna rectifier, the switching transient progress and the terminal voltage error are analyzed. The CB-PWM method clamps the zero-crossing phase to the neutral-point within clamped angle, which reduces terminal voltage error and improves the input current quality. The conventional SPWM method and the proposed clamped CB-PWM method are compared by simulation and experiment. The results show that the lower-order current harmonics and current THD can be reduced, which verifies the proposed clamped CB-PWM method.
Key wordsVienna rectifier    terminal voltage error    carrier-based modulation    clamped area   
收稿日期: 2018-03-11      出版日期: 2019-05-05
PACS: TM46  
通讯作者: 陈昌松 男,1977年生,博士,副教授,研究方向为微电网能量管理、储能充放电控制和可再生能源发电。E-mail: ccsfm@163.com   
作者简介: 朱文杰 男,1987年生,博士研究生,研究方向为电力电子变换器及其控制技术。E-mail: wenmuzh@163.com
引用本文:   
朱文杰, 陈昌松, 段善旭. 一种改善Vienna整流器输入电流品质的载波钳位调制方法[J]. 电工技术学报, 2019, 34(8): 1677-1688. Zhu Wenjie, Chen Changsong, Duan Shanxu. A Carrier-Based Modulation Method with Clamped Area for Input Current Performance of Vienna Rectifier. Transactions of China Electrotechnical Society, 2019, 34(8): 1677-1688.
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