Quantifying Damping Effect on Transient Stability of Grid-Connected Virtual Synchronous Generator With Current Limiting

IF 8.7 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Power Systems Pub Date : 2026-07-01 Epub Date: 2026-03-06 DOI:10.1109/TPWRS.2026.3670934

Jialun Yang;Hua Ye;Qianying Mou;Yifei Guo;Yutian Liu;Bikash C. Pal

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Abstract

The switching and saturation nonlinearities introduced by current limiting strategies not only reshape the power-angle characteristics but also change the damping properties of the virtual synchronous generator (VSG)-controlled grid-forming (GFM) inverters. However, the damping effect on the transient stability of GFM inverters with current limiting has not been intuitively and analytically investigated and quantified yet. This paper first analyzes the piecewise characteristic of the power-angle curve for the GFM inverter when current limiting is activated. Then concavity and convexity of the phase portrait under different operating modes of the GFM inverter are analytically investigated. An important proposition on the curvature of the phase portrait of GFM inverter with different current-limiting strategies is proposed and proven. Based on this, the dissipated energy of the GFM inverter is graphically illustrated and precisely estimated. Consequently, the critical clearing angle (CCA) and energy difference indicator of GFM inverters with current limiting are analytically determined with low conservativeness. The effectiveness of theoretical analyses is validated by simulation and experimental tests.

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定量阻尼对限流并网虚拟同步发电机暂态稳定性的影响

限流策略引入的开关非线性和饱和非线性不仅重塑了功率角特性，而且改变了虚拟同步发电机（VSG）控制的并网逆变器的阻尼特性。然而，阻尼对限流GFM逆变器暂态稳定性的影响尚未得到直观、分析和量化的研究。本文首先分析了GFM逆变器在限流状态下功率角曲线的分段特性。然后分析了GFM逆变器在不同工作模式下的相位肖像的凹凸性。提出并证明了不同限流策略下GFM逆变器相像曲率的重要命题。在此基础上，对GFM逆变器的耗散能量进行了图形化描述和精确估计。因此，采用低保守性分析方法确定了限流GFM逆变器的临界清除率（CCA）和能差指标。通过仿真和实验验证了理论分析的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Power Systems 工程技术-工程：电子与电气

CiteScore

15.80

自引率

7.60%

发文量

696

审稿时长

3 months

期刊介绍： The scope of IEEE Transactions on Power Systems covers the education, analysis, operation, planning, and economics of electric generation, transmission, and distribution systems for general industrial, commercial, public, and domestic consumption, including the interaction with multi-energy carriers. The focus of this transactions is the power system from a systems viewpoint instead of components of the system. It has five (5) key areas within its scope with several technical topics within each area. These areas are: (1) Power Engineering Education, (2) Power System Analysis, Computing, and Economics, (3) Power System Dynamic Performance, (4) Power System Operations, and (5) Power System Planning and Implementation.