Impacts Analysis of VSC Control Loop on DC Voltage Control Stability in Weak-grid

ZHANG Sidong; HUANG Yunhui; ZHOU Dangsheng; XING Zhongwei; CHEN Fuen; ZHU Guorong

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Impacts Analysis of VSC Control Loop on DC Voltage Control Stability in Weak-grid

更新时间：2025-12-08

- Impacts Analysis of VSC Control Loop on DC Voltage Control Stability in Weak-grid
- Vol. 47, Issue 8, Pages: 2730-2742(2021)
- 作者机构：
  
  1. 武汉理工大学自动化学院
  2. 禾望电气股份有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 August 2021，
  
  Published：2021
- 稿件说明：
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ZHANG Sidong, HUANG Yunhui, ZHOU Dangsheng, et al. Impacts Analysis of VSC Control Loop on DC Voltage Control Stability in Weak-grid[J]. 2021, 47(8): 2730-2742.
DOI：

ZHANG Sidong, HUANG Yunhui, ZHOU Dangsheng, et al. Impacts Analysis of VSC Control Loop on DC Voltage Control Stability in Weak-grid[J]. 2021, 47(8): 2730-2742. DOI：

摘要

为研究弱电网下电压源型变换器(voltage source converter

VSC)控制环路对直流电压控制稳定性的影响

首先建立了弱电网下VSC直流电压时间尺度小信号模型

基于动力学特性分析法用阻尼分量和恢复分量表征VSC直流电压控制的稳定性。然后研究了不同电网强度和不同控制带宽下VSC锁相环和交流电压控制环对阻尼分量和恢复分量的影响规律

揭示了锁相控制与交流电压控制对直流电压稳定性的影响机理。最后

在Matlab/Simulink中搭建详细的时域仿真模型

对稳定性分析结果进行了验证。研究结果表明

弱电网下锁相控制与交流电压控制对直流电压控制起相位滞后的作用

从而产生负的附加阻尼分量

减弱了直流电压控制的稳定性。

Abstract

In order to study the influence of VSC control loop on the stability of DC voltage control in weak-grid

a time-scale small signal model of VSC DC voltage in weak-grid was established firstly. Based on the analysis of dynamic characteristics

the stability of VSC DC voltage control was characterized by using damping components and restoring components. Moreover

under different strengths and different grid control bandwidths

the influence law of the VSC phase-locked loop and AC voltage control loop on the damping component and restoring component was studied

and the influence mechanism of the phase-locked control and AC voltage control on the DC voltage stability was revealed. Finally

a detailed time-domain simulation model was constructed on the Matlab/Simulink

and the stability analysis results were verified. The research results show that

in a weak grid

the phase-locked control and AC voltage control play a lag role in DC voltage control of phase

and negative additional damping components are generated

which damages the stability of DC voltage control.

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Related Institution

State Key Laboratory of Advanced Power Transmission Technology, State Grid Global Energy Interconnection Research Institute

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