计及直流电压控制的跟网型变流器暂态稳定分析与增强策略研究

李秋硕; 董新伟; 王垚鑫; 年珩; 吕康飞; 赵建勇

doi:doi:10.19912/j.0254-0096.tynxb.2024-0948

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计及直流电压控制的跟网型变流器暂态稳定分析与增强策略研究

更新时间：2025-12-17

- 计及直流电压控制的跟网型变流器暂态稳定分析与增强策略研究
- Issue 10, Pages: 403-411(2025)
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0948
  CLC： M46
- Published Online：31 October 2025，
  
  Published：31 October 2025
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李秋硕, 董新伟, 王垚鑫, et al. 计及直流电压控制的跟网型变流器暂态稳定分析与增强策略研究[J]. 2025, (10): 403-411.
DOI：

李秋硕, 董新伟, 王垚鑫, et al. 计及直流电压控制的跟网型变流器暂态稳定分析与增强策略研究[J]. 2025, (10): 403-411. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0948.

摘要

针对弱电网下的跟网型变流器（GFL-VSC）

在计及直流电压控制（DVC）影响的条件下

研究其稳定运行及同步控制策略。首先

建立考虑DVC的GFL-VSC大扰动模型。在此基础上

通过类比传统同步发电机转子功-角摇摆方程

推导出系统阻尼比

从而反映出电网电压跌落故障下系统的暂态失稳机理和影响因素

通过绘制系统功率-电流曲线分析系统平衡点的存在性和稳定性。进而

提出一种基于锁相环自适应参数和功角补偿及可变角速度的GFL-VSC暂态稳定性提升方法。最后

Matlab/Simulink仿真结果证明了暂态稳定分析的准确性和所提控制策略的有效性。

Abstract

Considering the influence of DC-link voltage control（DVC）

the stable operation and synchronization control strategy of grid-following converters under weak grid conditions are studied. Firstly

a large disturbance model of grid-following converters with consideration of DVC is established. Based on this

by analogy with the rotor angle oscillation equation of traditional synchronous generators

the damping ratio of the system is derived

reflecting the transient instability mechanism and influencing factors under large disturbances. The existence and stability of the system equilibrium point are analyzed by drawing the power-current curve of the system. Then

a transient stability enhancement method for GFL-VSC based on phase-locked loop adaptive parameter

power angle compensation

and variable angular velocity is proposed. Finally

the simulation results of Matlab/Simulink prove the accuracy of the transient stability analysis and the effectiveness of the proposed control strategy.

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references

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