Transient Stability Analysis of System With Paralleled Grid-following Converter and Grid-forming Converter Considering Transient Mode Switching

CHEN Zhenyi; YANG Lihui; SHI Jinzhu; HAN Xiaojing

doi:10.13334/j.0258-8013.pcsee.241359

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Transient Stability Analysis of System With Paralleled Grid-following Converter and Grid-forming Converter Considering Transient Mode Switching

更新时间：2026-07-27

- Transient Stability Analysis of System With Paralleled Grid-following Converter and Grid-forming Converter Considering Transient Mode Switching
- Vol. 45, Issue 15, Pages: 6025-6037(2025)
- 作者机构：
  
  西安交通大学电气工程学院,陕西省,西安市,710049
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.241359
  CLC：
- Published：2025
- 稿件说明：
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CHEN Zhenyi, YANG Lihui, SHI Jinzhu, et al. Transient Stability Analysis of System With Paralleled Grid-following Converter and Grid-forming Converter Considering Transient Mode Switching[J]. 2025, 45(15): 6025-6037.
DOI：

CHEN Zhenyi, YANG Lihui, SHI Jinzhu, et al. Transient Stability Analysis of System With Paralleled Grid-following Converter and Grid-forming Converter Considering Transient Mode Switching[J]. 2025, 45(15): 6025-6037. DOI： 10.13334/j.0258-8013.pcsee.241359.

摘要

由跟网型变换器(grid-following voltage source converter，GFL-VSC)及构网型变换器(grid-forming voltage source converter，GFM-VSC)构成的混联系统中，复杂的暂态交互作用使系统的安全稳定运行面临挑战，明确变换器间的动态耦合机理及其对系统暂态稳定性的影响至关重要。GFM-VSC中设置的电流限幅环节会导致其暂态运行方式发生切换，进一步增加了GFM-VSC与GFL-VSC之间的耦合机理的复杂性。为揭示GFM-VSC发生暂态模式切换时与GFL-VSC之间的动态耦合机理及该耦合对GFM-VSC故障恢复过程的作用机制，首先，建立考虑GFM-VSC限幅环节的混联系统暂态耦合模型；基于此模型，分析故障期间及故障切除后，GFL-VSC的参数对GFM-VSC工作模式切换的影响机理；随后，针对不同程度的电网电压跌落故障，分析故障切除后GFM-VSC的工作模式切换过程，得到混联系统中GFM-VSC在故障切除后可切换回正常工作模式的临界条件；最后，构建混联系统的仿真模型，验证理论分析的正确性。

Abstract

In the hybrid system consisting of a grid-following voltage source converter (GFL-VSC) and a grid-forming voltage source converter (GFM-VSC)

the complex transient interactions make it a challenge to keep the system operating safely and stably. Therefore

it is crucial to clarify the dynamic coupling mechanism between the converters and the effect of the coupling mechanism on the transient stability of the system. The current limiting measure taken in the GFM-VSC leads to the switching of its transient operation mode

which further increases the complexity of the coupling mechanism between the GFM-VSC and the GFL-VSC. To reveal the dynamic coupling mechanism between the GFM-VSC and the GFL-VSC during the transient operation mode switching and the effect of this coupling on the fault recovery process of the GFM-VSC

this paper first establishes a transient coupling model of the hybrid system considering the current limiter of the GFM-VSC. Based on this model

the influence of the parameters of the GFL-VSC on the operation mode switching of the GFM-VSC during the fault and after the fault clearance is analyzed. Then

the operation mode switching process of the GFM-VSC after fault clearance is analyzed in detail for different degrees of grid voltage sag

so as to obtain the critical conditions for successful restoration to normal operation mode in hybrid systems. Finally

the simulation model of the hybrid system is constructed to verify the correctness of the theoretical analysis in this paper.

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