A simplified algorithm and a method of voltage harmonic analysis for two-level space vector pulse width modulation

被引：0
|
作者：
机构：
[1] Yu, Xinyu
[2] Wei, Yingdong
[3] Jiang, Qirong
来源：
Yu, Xinyu | 1600年 / Power System Technology Press卷 / 38期
基金：
中国国家自然科学基金;
关键词：
Vector spaces - Voltage control - Linear transformations - Pulse width modulation - Power converters;
D O I：
10.13335/j.1000-3673.pst.2014.09.030
中图分类号：
学科分类号：
摘要：
The traditional algorithm for 2-level space vector pulse width modulation (SVPWM) is complicated with large computation. In this paper, based on the volt-second balance equation of traditional algorithm, the linear equations of the pulse time of switching devices in 3-phase upper arms are set up and solved, thus a simplified algorithm for 2-level SVPWM without coordinate transformation and sector judgment is proposed, which reduces a lot of computation and is much easier to implement. Based on the simplified algorithm, a method of voltage harmonic analysis for synchronous SVPWM is proposed, which presents the generic expressions of the voltage harmonic spectrum when the distribution of zero vectors is varied, and explains the distribution characteristics of voltage harmonics qualitatively. The accuracy of the simplified algorithm and the novel method of voltage harmonic analysis for 2-level SVPWM are verified by the simulation results based on PSCAD/EMTDC.
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