基于直流链路分数阶虚拟同步的构网型变流器控制策略

杨兴武; 马朝旭; 王雅妮; 刘春; 宋晋峰; 陈国栋

doi:doi:10.19912/j.0254-0096.tynxb.2024-1426

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基于直流链路分数阶虚拟同步的构网型变流器控制策略

更新时间：2026-01-08

- 基于直流链路分数阶虚拟同步的构网型变流器控制策略
- Vol. 46, Issue 12, Pages: 426-436(2025)
- 作者机构：
- 作者简介：
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-1426
  CLC： TM46
- Published Online：07 January 2026，
  
  Published：2025
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杨兴武, 马朝旭, 王雅妮, et al. 基于直流链路分数阶虚拟同步的构网型变流器控制策略[J]. 2025, 46(12): 426-436.
DOI：

杨兴武, 马朝旭, 王雅妮, et al. 基于直流链路分数阶虚拟同步的构网型变流器控制策略[J]. 2025, 46(12): 426-436. DOI： doi:10.19912/j.0254-0096.tynxb.2024-1426.

摘要

为解决阻尼效应增加导致惯性效应退化的问题

该文结合直流电容电压自同步控制和分数阶控制理论

提出一种基于直流链路分数阶虚拟同步（DCFOVSC）的构网型变流器控制策略。利用直流链路电容的动态特性实现自同步

引入分数阶控制拓展控制自由度

优化系统动态特性

为系统提供足量惯性和阻尼支撑。建立DCFOVSC控制策略的小信号模型

利用频域分析讨论DCFOVSC的动态性能及影响因素

证明其能够在弱电网中稳定运行

具有良好的鲁棒性。在Matlab/Simulink中搭建基于所提控制策略的并网变流器

在有功功率变化、电网频率变化、不同电网强度、电网电压幅值变化4种工况下验证该控制策略的有效性。最后

进行实验验证。

Abstract

To address the issue of the decline in the inertia effect due to the rise in the damping effect

this paper integrates the DC capacitor voltage self-synchronization control and fractional order control theory

proposing a novel grid-forming converters based on DCFOVSC （DC link fractional order virtual synchronization control） control strategy. The dynamic characteristics of the DC link capacitance are employed to achieve self-synchronization

and fractional-order control is incorporated to augment the control degrees of freedom

optimize the dynamic characteristics of the system

and furnish sufficient inertia and damping support for the system. In this paper

a small-signal model of the DCFOVSC control strategy is established

and the dynamic performance and influencing factors of the DCFOVSC are discussed using frequency domain analysis. The analysis results demonstrate that the DCFOVSC is capable of stable operation in a weak grid with good robustness. A grid-connected converter based on the proposed control strategy is constructed in Matlab/Simulink

and the effectiveness of the control strategy is verified under four working conditions： active power variation

grid frequency variation

different grid strengths

and grid voltage amplitude variation. Finally

experimental validation is carried out.

关键词

Keywords

references

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