计及电流限幅环节影响的VSG暂态稳定区间分析方法
By analyzing the active-frequency control relationship of the VSG and the influence of the current limiting stage, the virtual power angle curve was corrected, and the limit cut-off angle and time were calculated. This solved the problem of quantitative characterization of the transient stability range of the VSG by the current limiting stage, ensuring that the VSG can quickly recover stability after a fault and reducing the risk of system instability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN UNIV
- Filing Date
- 2022-11-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing research has failed to effectively consider the impact of current limiting on the transient stability range of virtual synchronous generators (VSGs), resulting in a decrease in the transient stability margin of VSGs and an increase in the risk of system instability.
By analyzing the active power-frequency control relationship of VSG, the influence of the current limiting circuit on the transient characteristics of VSG is qualitatively and quantitatively evaluated. The virtual power angle curve is corrected, and the critical cut-off angle (CCA) and critical cut-off time (CCT) are calculated to achieve a quantitative characterization of the transient stability range of VSG.
A qualitative analysis of the impact of the current limiting circuit on the transient stability characteristics of the VSG is provided. The limit clearing angle and limit clearing time under different current limiting multiples and fault depths are determined to ensure that the VSG can quickly recover stability after a fault and to guarantee the transient stable operation of the system.
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Figure CN115833225B_ABST