Harmonic Analysis on the Input Current of Indirect Matrix Converter under Different Modulation Strategies
Mei Yang1, 2, Chen Lisha1, 2, Wang Shanshan1, 2
1. Collaborative Innovation Center of Key Power Energy-Saving Technologies in Beijing North China University of Technology University Beijing 100144 China; 2. Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100144 China
Abstract The mathematical model based on the transfer function of the indirect matrix converter (IMC) is established for ascertaining harmonic components, to clarify the characteristics of input current harmonics and further suppress harmonics for improving power grid quality. Furthermore, the pulse barycenter concept, in which the amplitude, width and distribution position of a pulse are all considered, is introduced to analyze and determine the frequencies and magnitudes of main harmonic components. In addition, the principle of the output voltage vector pulse proportional symmetric distribution, which is able to attenuate input current harmonics, is discovered in the process of theoretical analysis and utilized under different modulation strategies. Simulation and experimental results show that, by using either dual space vector modulation (SVM) or two-stage pulse-width-modulation (PWM) with the pulse proportional symmetric distribution, the input currents mainly contain (6n±1)th low order harmonics, which are irrelevant to the output frequency, and the harmonic contents decrease as the frequency increases. Simulation and experimental results coincide with the theoretical results, which demonstrate the validity of the theoretical analysis.
Mei Yang,Chen Lisha,Wang Shanshan. Harmonic Analysis on the Input Current of Indirect Matrix Converter under Different Modulation Strategies[J]. Transactions of China Electrotechnical Society, 2018, 33(12): 2850-2860.
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2018, Vol. 33 
