DC Side Impedance Modeling and Stability Analysis of VSC-MTDC System

LI Yuye; LIU Kaipei; ZHU Shu; HUAI Qing; LIAO Xiaobing

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DC Side Impedance Modeling and Stability Analysis of VSC-MTDC System

更新时间：2025-12-08

- DC Side Impedance Modeling and Stability Analysis of VSC-MTDC System
- Vol. 47, Issue 2, Pages: 627-638(2021)
- 作者机构：
  
  武汉大学电气与自动化学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：28 February 2021，
  
  Published：2021
- 稿件说明：
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LI Yuye, LIU Kaipei, ZHU Shu, et al. DC Side Impedance Modeling and Stability Analysis of VSC-MTDC System[J]. 2021, 47(2): 627-638.
DOI：

LI Yuye, LIU Kaipei, ZHU Shu, et al. DC Side Impedance Modeling and Stability Analysis of VSC-MTDC System[J]. 2021, 47(2): 627-638. DOI：

摘要

直流电压稳定是多端柔性直流输电（voltage source converter based multi-terminal high voltage direct current transimisson

VSC-MTDC）系统稳定的前提。相比特征值法

采用阻抗稳定判据分析VSC-MTDC系统的直流稳定性问题具有建模过程简单和物理意义清晰等优势。建立了基于通用下垂控制的多端柔性直流输电系统的直流侧小信号阻抗模型

并采用奈奎斯特稳定判据分析了传输功率、下垂系数、线路长度、换流站直流电容对系统的稳定性的影响。根据稳定性分析

设计相应的仿真实验

验证了该分析方法的准确性。

Abstract

DC voltage stability is the precondition for the stability of a VSC-MTDC system. Compared with the eigenvalue method

the DC stability of the VSC-MTDC system using impedance stability criterion has the advantages of simple modeling process and clear physical meaning. Consequently

a small signal impedance model of VSC-MTDC system based on general droop control is established in this paper. The influences of transmission power

droop coefficient

line length and DC side capacitance on the stability of VSC-MTDC system are analyzed by using the Nyquist stability criterion. According to the stability analysis

the corresponding simulation experiments are designed and performed to verify the validity of the impedance stability criterion.

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