High-Reliability Three-Phase Dual-Buck Grid-Connected Inverter without Shoot-Through Problem

Zhenbin Fu; Zhihua Feng; Xi Chen; Xinxin Zheng

High-Reliability Three-Phase Dual-Buck Grid-Connected Inverter without Shoot-Through Problem

Vol. 19, No. 2, pp. 454-462, Mar. 2019

10.6113/JPE.2019.19.2.454

Dual-buck inverter

Dead-time

Half-cycle control

Shoot-through problem

System stability

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Abstract

When compared to traditional bridge-type inverters, the dual-buck inverter has a higher reliability due to the fact that its bridge legs do not have a shoot-through problem. In this paper, the working principle of the dual-buck inverter is analyzed. A comparison of the working modes under full-cycle and half-cycle control is discussed. With half-cycle control, the inverter can realize a higher efficiency. However, this results in current zero-crossing distortion. The corresponding control strategy of the dual-buck inverter is proposed in order to realize both high efficiency and low current harmonic distortion. In addition, the system stability is analyzed. Dead-time is unnecessary due to the advantages of the topology. Thus, the current harmonic distortion can be further reduced. An inverter with the proposed control strategy has the advantages of high reliability, high efficiency and low current harmonic distortion. Finally, simulation and experimental results are given to verify the theoretical analysis.

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Cite this article

[IEEE Style]

Z. Fu, Z. Feng, X. Chen, X. Zheng, "High-Reliability Three-Phase Dual-Buck Grid-Connected Inverter without Shoot-Through Problem," Journal of Power Electronics, vol. 19, no. 2, pp. 454-462, 2019. DOI: 10.6113/JPE.2019.19.2.454.

[ACM Style]

Zhenbin Fu, Zhihua Feng, Xi Chen, and Xinxin Zheng. 2019. High-Reliability Three-Phase Dual-Buck Grid-Connected Inverter without Shoot-Through Problem. Journal of Power Electronics, 19, 2, (2019), 454-462. DOI: 10.6113/JPE.2019.19.2.454.