Research on Multilevel PFC Topology Based on Full Binary-tree Structure

MA Hui; LI Yutian; XIANG Kun; FAN Liping; LIU Jie; LU Yun; XU Hengshan; XI Lei; WANG Can; HUANG Yuehua

doi:10.13334/j.0258-8013.pcsee.241184

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Research on Multilevel PFC Topology Based on Full Binary-tree Structure

更新时间：2026-01-04

- Research on Multilevel PFC Topology Based on Full Binary-tree Structure
- Issue 22, Pages: 8958-8967(2025)
- 作者机构：
  
  1. 智慧能源技术湖北省工程研究中心(三峡大学电气与新能源学院),湖北省,宜昌市,443002
  2. 国网湖北省电力有限公司宜昌供电公司,湖北省,宜昌市,443000
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.241184
  CLC：
- Published：2025
- 稿件说明：
移动端阅览
MA Hui, LI Yutian, XIANG Kun, et al. Research on Multilevel PFC Topology Based on Full Binary-tree Structure[J]. 2025, (22): 8958-8967.
DOI：

MA Hui, LI Yutian, XIANG Kun, et al. Research on Multilevel PFC Topology Based on Full Binary-tree Structure[J]. 2025, (22): 8958-8967. DOI： 10.13334/j.0258-8013.pcsee.241184.

摘要

多电平功率因子校正(power factor correction，PFC)变换器在中高压、大容量领域应用广泛。针对传统多电平拓扑使用的器件数量较多，扩展方式不明显等问题。该文以三电平钳位单元为出发点，结合多电平电路构造方法，推衍出一种基于满二叉树结构的新型多电平拓扑(multilevel topology based on full binary-tree structure，MT-FBT)。该型拓扑模块化程度较高、输出电平数量与扩展次数呈2的指数趋势，同时在器件数量层面较传统多电平拓扑具有一定的优势。首先，给出MT-FBT的推衍过程并归纳得到其一般形式，在此基础上阐述其扩展方式与钳位原理；然后，以MT-FBT扩展而成的四电平PFC电路为例，从工作原理、调制策略与控制方法等方面进行分析；最后，设计制作一台额定功率为1 kW的实验样机，实验结果验证了MT-FBT的可行性和所推导变换器的工程应用价值。

Abstract

Multilevel PFC circuits are widely used in medium and high-voltage applications. However

conventional multilevel topologies suffer from the large number of semiconductor devices and the lack of obvious expansion methods. In this paper

a new multilevel topology based on the full binary tree structure (MT-FBT) is derived by combining multilevel construction methods with a three-level clamp unit as the starting point. This topology has a high degree of modularity

an exponential trend of 2 in the number of output levels and structure layers

and an advantage over traditional multilevel topologies in terms of the number of devices. In this paper

the derivation process and its general form is obtained. On this basis

the expansion method and clamping principle are elaborated. Then

the four-level converters extended by the MT-FBT are analyzed in detail in terms of working principle

PWM modulation strategies and control methods. Finally

experimental prototypes with rated power of 1 kW are designed and built. The experimental results verify the feasibility of the MT-FBT and the engineering application value of the derived converters.

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