一种基于零序电压分量注入的单相三电平载波PWM算法

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Abstract To suppress the DC-link neutral point voltage fluctuation of single phase neutral-point- clamped(NPC) converters, the principle and shortcoming of a single phase three-level unipolar carrier-based pulse width modulation(CBPWM) algorithm is analyzed firstly. On basis of this, a single-phase three-level unipolar CBPWM with zero-sequence voltage injection (CBPWM-ZSVI) is proposed. Then, the upper and lower limitations of zero-sequence voltage is presented. The adopted CBPWM-ZSVI algorithm can achieve voltage balance ability effectively and dynamic anti-interference ability perfectly, and restrict AC terminal voltage step of the adopted converter within a half of DC-link voltage. Finally, the performance of CBPWM and CBPWM-ZSVI algorithms are compared by computer simulation and 1kW prototype experimental test. Simulation and experimental results verify the effectiveness and feasibility of the proposed CBPWM-ZSVI algorithm.

Key words： Three-level single-phase neutral point voltage control carrier-based pulse width modulation zero-sequence voltage

Received: 16 September 2011 Published: 25 March 2014

PACS:

TM921.45

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	Feng Xiaoyun
	Song Wensheng

Cite this article:

Feng Xiaoyun,Song Wensheng. A Single Phase Three-Level Carrier-based PWM Scheme with Zero-sequence Voltage Injection[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 140-148.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I4/140

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