陆海,等
2022 52 8 ELECTRIC DRIVE A -
中图分类号: 文献标识码: DOI:
A Neutral Point Potential Balancing Method for Two-stage Three-level Power Conversion System
LU Hai1,ZHANG Xudong1,DANG Junpeng2,GUO Li3,LIU Rui3
(1. Institute of Electric Power Research of Yunnan Power Grid Co.,Ltd.,Kunming 650217,Yunnan,China;
2. Yuxi Power Supply Bureau of Yunnan Power Grid Co.,Ltd.,Yuxi 653100,Yunnan,China;
3. Key Laboratory of Smart Grid of Ministry of Education,
Tianjin University,Tianjin 300072,China)
Abstract: A 2-stage three-level power conversion system(PCS)was studied,in which the 3-level T-type 3-leg
3-phase 4-wire(3LT23L3P4W)topology was adopted as AC/DC part while the 3-level Buck/Boost topology was
utilized as DC/DC interface. To address the neutral point potential(NPP)unbalance of the PCS,firstly,with the
asymmetry extent and power factor of AC current accounted,a mo
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