Modeling and control of an isolated module multilevel DC/DC converter for DC grid

Xinying Wang; Guangfu Tang; Zhiyuan He; Xiaoguang Wei; Hui Pang; Xiangning Xiao

doi:10.17775/CSEEJPES.2017.0019

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Modeling and control of an isolated module multilevel DC/DC converter for DC grid

更新时间：2025-12-18

- Modeling and control of an isolated module multilevel DC/DC converter for DC grid
- CSEE Journal of Power and Energy Systems Vol. 3, Issue 2, Pages: 150-159(2017)
- 作者机构：
  
  1. North China Electric Power University,, Beijing, CN,Beijing
  2. Global Energy Interconnection Research Institute and the members of state key laboratory of advanced transmission technology,Beijing,China,102209
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2017.0019
  CLC：
- Published：2017
- 稿件说明：
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Xinying Wang, Guangfu Tang, Zhiyuan He, et al. Modeling and control of an isolated module multilevel DC/DC converter for DC grid[J]. CSEE Journal of Power and Energy Systems, 2017, 3(2): 150-159.
DOI：

Xinying Wang, Guangfu Tang, Zhiyuan He, et al. Modeling and control of an isolated module multilevel DC/DC converter for DC grid[J]. CSEE Journal of Power and Energy Systems, 2017, 3(2): 150-159. DOI： 10.17775/CSEEJPES.2017.0019.

摘要

Abstract

This paper presents an isolated DC/AC/DC converter using a middle frequency transformer coupling two modular multilevel converters (MMC)

suitable for interconnecting DC transmission lines of different voltage levels in high voltage direct current (HVDC) system. The basic operational principle of the isolated module multilevel DC/DC converter (IMMDCC) is analyzed. The dynamic model of IMMDCC is studied in detail and the transient relationship between DC side and AC side of IMMDCC is revealed

which is physically straightforward for understanding the power transfer in IMMDCC. The control strategy in D-Q coordinate system is put forward

and the fault characteristic and corresponding protection method is analyzed. Finally

computer simulation using Matlab/Simulink is performed to verify the dynamic model and the proposed control strategy. The simulation results show good performances and the quick response ability of the proposed control strategy.

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