基于动态空间矢量的三电平逆变器不连续调制策略

doi:10.19595/j.cnki.1000-6753.tces.171605

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Abstract Since the neutral point potential fluctuation of three-level inverter is difficult to suppress under discontinuous modulation strategy, a dynamic space vector strategy was proposed. This strategy could generate a dynamic space vector by real-time detecting the upper and lower capacitor voltages, and then accurately synthesize the reference vector. This paper adopted gh coordinate system and parity sector conversion method to reduce the complexity of the dynamics algorithm. In order to eliminate the neutral point potential offset, this paper also proposed a method of switching vector sequence with reverse effect on the neutral point potential in real time. Finally, the evaluation method of modulation strategy based on the error current vector was given, which verified the advantages of the dynamic space vector modulation. Simulation and experimental results further show the effectiveness of the proposed method.

Key words： Dynamic space vector Neutral point potential balance Switching loss neutral point clamped (NPC) three level inverter Error current analysis

Received: 27 November 2017 Published: 29 January 2019

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TM464

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	Articles by authors
	Zeng Jiang
	Yang Lin
	Huang Junchi
	Qiu Guobin

Cite this article:

Zeng Jiang,Yang Lin,Huang Junchi等. Discontinuous Modulation of Three-Level Inverter Based on Dynamic Space Vector[J]. Transactions of China Electrotechnical Society, 2019, 34(2): 377-386.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171605 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I2/377

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