Smooth Switching Technique for Voltage Balance Management Based on Three-Level Neutral Point Clamped Cascaded Recti?er

Xu Peng, Xiaoqiong He, Pengcheng Han, Aiping Guo, Zeliang Shu and Shibin Gao
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Xu Peng: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Xiaoqiong He: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Pengcheng Han: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Aiping Guo: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Zeliang Shu: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Shibin Gao: School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Energies, 2016, vol. 9, issue 10, 1-16

Abstract: This paper discussed the topology of in the three-level neutral point clamped cascaded recti?er (3LNPC-CR) for designing the Chinese Power Electronic Traction Transformer (PETT). To balance the DC-link voltage (Vdc) in 3LNPC-CR, a smooth switching technique is proposed in this paper. The controlling processes of each module are relatively independent when the proposed technique is applied in 3LNPC-CR. The proposed technique can keep the switching frequency constant and change the switch state smoothly while balancing Vdc. The Vdc balance ability is analyzed by calculating the unbalance degree of the loads. Simulation and experiment of three-module 3LNPC-CR are built, and then the effectiveness of the proposed technique is veri?ed.

Keywords: three-level neutral point clamped cascaded recti?er (3LNPC-CR); voltage balance; switching technique (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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