宽短路比工况下构网型逆变器功率自同步控制的稳定性分析

MA Junpeng; LI Lei; CHI Chengbin; WANG Shunliang; LIU Tianqi

doi:10.19783/j.cnki.pspc.240664

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宽短路比工况下构网型逆变器功率自同步控制的稳定性分析

更新时间：2025-10-19

- 宽短路比工况下构网型逆变器功率自同步控制的稳定性分析
- Power System Protection and Control Vol. 45, Issue 7, Pages: 165-173(2025)
- 作者机构：
  
  1. (1.中国电力科学研究院有限公司，北京 100192
  2. 2.四川大学电气工程学院，四川成都 610065)
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.240664
  CLC： TM464
- Published：2025
- 稿件说明：
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MA Junpeng, LI Lei, CHI Chengbin, et al. 宽短路比工况下构网型逆变器功率自同步控制的稳定性分析[J]. Power system protection and control, 2025, 45(7): 165-173.
DOI：

MA Junpeng, LI Lei, CHI Chengbin, et al. 宽短路比工况下构网型逆变器功率自同步控制的稳定性分析[J]. Power system protection and control, 2025, 45(7): 165-173. DOI： 10.19783/j.cnki.pspc.240664.

摘要

基于功率同步控制(power synchronization control

PSC)的构网型(grid-forming

GFM)电压源型逆变器(voltage source converter

VSC)通过模拟同步机功角特性以实现电网支撑，但其在宽短路比(short-circuit ratio

SCR)运行工况下存在振荡风险。为分析构网型逆变器在宽短路比工况下的稳定情况，首先建立了PSC-VSC小信号模型，得到了有功、无功功率的传递函数，并以此揭示了GFM逆变器在宽短路比工况下小干扰失稳机理。结果表明，PSC-VSC在强电网下面临小信号失稳风险。进而提出基于功率自同步控制(power self-synchronization control

PSSC)的VSC控制策略，通过限制有功功率传递函数的增益，增强构网型逆变器强电网下的稳定性。然后分析了基于PSSC的GFM逆变器在电网故障下的稳定性。最后通过半实物实时仿真验证了所提分析方法的正确性和有效性。

Abstract

Grid forming (GFM) voltage source converters (VSC) based on the power synchronization control (PSC) are used to support the grid by emulating the power angle characteristics of synchronous machines. However

they face oscillation risks under wide range of short-circuit ratio (SCR) conditions. To analyze the stability of GFM converters under wide range SCR conditions

this paper establishes a small-signal PSC-VSC model

and the transfer functions of active and reactive power are derived. Based on this

the small-signal instability mechanism of GFM converters under wide range of SCR conditions is revealed. The results show that PSC-VSC faces small-signal instability risks in strong grid conditions. Subsequently

by limiting the gain of the active power transfer function

the power self-synchronization control (PSSC) based VSC control strategy is proposed to enhance the stability of GFM converters in strong grid conditions. Furthermore

the stability of PSSC-based GFM converters under grid faults is analyzed. Finally

the correctness and effectiveness of the proposed analysis method are verified through hardware-in-the-loop real-time simulation.

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