舰船电力推进系统中矩阵变换器输出电压谐波频谱分析

吴玲玲; 李家志; 肖宏; 陈丽颖; 罗威

doi:10.19693/j.issn.1673-3185.01387

舰船电力推进系统中矩阵变换器输出电压谐波频谱分析

Harmonic spectrum analysis of output voltage for matrix converter in marine electric propulsion system

摘要

摘要:
目的针对舰船电力推进系统中矩阵变换器输出电压谐波特性，
方法基于三重傅立叶级数，提出一种谐波解析计算方法。首先，结合三重傅立叶级数推导出直接传递函数调制法下矩阵变换器输出电压各谐波分量的解析解，然后，根据解析解对谐波分布规律及主要谐波分量进行分析，最后，与实验测得的输出电压波形的快速傅立叶变换（FFT）分析结果进行对比，以验证所提方法的可行性与结论的准确性。
结果计算结果表明，高频段频率为f_c±f_in，2f_c±f_in的共模分量幅值较高。
结论所提方法能够精确确定所有频段各次谐波分量的幅值和频率，为谐波抑制的研究提供理论依据，同时也可完善矩阵变换器的谐波分析理论。

Abstract:
Objectives In this paper, the harmonic characteristics of output voltage for a matrix converter (MC)in marine electric propulsion system are studied.
Methods Based on triple Fourier Series, an analytical calculation method to determine harmonic components of MC is proposed. Firstly, combined with the triple Fourier Series, the analytical results of the harmonic components of output voltage for a matrix converter under the direct transfer function modulation strategy are derived. Then according to the results, the harmonic distribution characteristics as well as main harmonic components are analyzed. Finally, the feasibility of the method and the accuracy of the analysis conclusions are verified by comparative analysis against the Fast Fourier Transform(FFT) results of the output voltage waveform obtained from the test.
Results It is found that the amplitude of common mode components with high frequency of f_c ±f_in and 2f_c ±f_in are higher.
Conclusions This method can determine the amplitudes and frequency of different harmonic components precisely, which provides a theoretical basis for the study of harmonic suppression, and also improves the theory of harmonic analysis of matrix converter.

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