用于级联型大功率变流器的多变量组合控制方案

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Abstract A multi-variable combination control scheme is proposed for high power cascaded inverter. The asymmetric voltage bus control, phase shifting control and pulse wide modulation control are combined effectively. This control scheme processes preferable low-order harmonics elimination with low switching frequency for all switches, comparing with the traditional asymmetric level, staircase and hybrid modulation control scheme. The harmonics of output voltage and power distribution of each inverter module are analyzed. The multi-variable combination control scheme is characterized as concise and reliable control scheme, low switching frequency and strong commonality for several typical cascaded inverters. The feasibility of control scheme and effect of low-order elimination is verified by prototype with hybrid asymmetric cascaded topology and SPWM or SHEPWM strategy. Simulation and experimental results show validity of theoretical analysis.

Key words： Cascaded inverter low switching frequency multi-variable combination control harmonics elimination

Received: 23 August 2013 Published: 13 April 2015

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TM464

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	Cao Jiankun
	Xie Shaojun

Cite this article:

Cao Jiankun,Xie Shaojun. Multi-variable Combination Control Scheme for High Power Cascaded Inverters[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 129-136.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I4/129

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