一种三相二重化串联型逆变器谐波分析

Harmonic characteristic analysis of a three-phase dual series-connected inverter

多重化逆变器具有等效开关频率高、输出波形质量好、系统动态响应快、装置冗余性好等特点,在舰船综合电力系统中具有重要的研究价值。因此,基于双重傅里叶级数的数值分析法,对一种SVPWM调制的三相二重化逆变器输出相电压谐波通用表达式进行分析,揭示了输出谐波的相位关系和对消的基本规律。计算与实验结果表明:所提谐波分析方法有效且具有普遍性,可以拓展于任意重化逆变器的谐波分析。

The multiple inverters have important research value in the technology of multi-level inverter with its advantages characteristics of high equivalent switching frequency,high output waveform quality,fast dynamic response and high redundancy.The peak value of the phase voltage harmonic spectrum general formula of a three-phase dual series-connected voltage source SVPWM inver-ter was thoroughly analyzed,based on the numerical analysis method of double Fourier series,and the phase relationship and cancellation law of the output harmonic were revealed.The analysis method is effective and can be universally applicable to any multiple inverter harmonic analysis,which was verified by calculation and experiment.