调制比对逆变器输出波形质量的影响

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Abstract In voltage source inverter system, voltage is the general type selection as controlled variable, because output voltage has nothing to do with load. Conventional total harmonic distortion (THD) can be used as a evaluation factor of the output waveform. But in power system, low frequency component of the harmonic plays a greater influence than high frequency component, so this paper uses weighted total harmonic distortion(WTHD) as a evaluation factor of the output waveform, and consider the Influence of modulation to output waveform of the single-phase full bridge inverter with pure inductance load. Firstly, the paper proposes that the voltage modulation ratio was one of the factors influencing the output wave. Secondly, the paper adopts the digital control strategy based on immune genetic algorithm, and writs C language program to calculate the optimal control sequence of different voltage modulation, and simulated. Finally, the paper builds binlds experimental platform based on digital signal processing TMS320F2812, and does a lot of experiments. The data of the simulation and experimental resalts shows that the voltage modulation should be suitable in order to obtain the most optimal voltage wave of the inverter and the total harmonic distortion is the lowest.

Key words： Immune algorithm inverter voltage modulation WTHD DSP

Received: 02 November 2010 Published: 07 March 2014

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TM46

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	Yuan Jiaxin
	Rao Binbin
	Liu Junbo
	Chen Baichao

Cite this article:

Yuan Jiaxin,Rao Binbin,Liu Junbo等. Influence of Modulation Rafio to Output Waveforms of the Inverter[J]. Transactions of China Electrotechnical Society, 2011, 26(1增): 142-147.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I1增/142

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