Protection Scheme for MMC-MTDC Transmission Lines Based on Fault Coefficient

Dahai Zhang; Chuanjian Wu; Jinghan He; Pinghao Ni

doi:10.17775/CSEEJPES.2021.00050

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Protection Scheme for MMC-MTDC Transmission Lines Based on Fault Coefficient

Regular Papers | 更新时间：2026-10-15

- Protection Scheme for MMC-MTDC Transmission Lines Based on Fault Coefficient
- CSEE Journal of Power and Energy Systems Vol. 11, Issue 3, Pages: 1262-1269(2025)
- 作者机构：
  
  School of Electrical Engineering, Beijing Jiaotong University,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2021.00050
  CLC：
- Published：01 May 2025
- 稿件说明：
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Dahai Zhang, Chuanjian Wu, Jinghan He, et al. Protection Scheme for MMC-MTDC Transmission Lines Based on Fault Coefficient[J]. CSEE Journal of Power and Energy Systems, 2025, 11(3): 1262-1269.
DOI：

Dahai Zhang, Chuanjian Wu, Jinghan He, et al. Protection Scheme for MMC-MTDC Transmission Lines Based on Fault Coefficient[J]. CSEE Journal of Power and Energy Systems, 2025, 11(3): 1262-1269. DOI： 10.17775/CSEEJPES.2021.00050.

摘要

Abstract

Multi-terminal direct current based on a modular multilevel converter (MMC-MTDC) has received more attention due to the advantages of large capacity and high flexibility. However

the current traveling wave protection schemes adopted by the MMC-MTDC DC project are not sufficiently sensitive to high-impedance faults. To solve this problem

this paper first analyzes the characteristics of the first traveling wave of the fault on the DC transmission line and derives the expressions of the first traveling wave of the fault when the DC transmission line has an internal and external fault. Subsequently

the line frequency characteristic is used to simplify the traveling wave expression and construct the fault coefficient. Finally

the principle of single-ended traveling wave protection based on the fault coefficient is proposed. Simulation results show that the protection principle has a strong ability to withstand transition resistance and noise interference.

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Related Institution

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