Linear Time-Periodic Theory-based Novel Stability Analysis Method for Voltage-Source Converter under Unbalanced Grid Conditions
发布时间：2025-11-05
点击次数：
- 发布时间：
- 2025-11-05
- 影响因子：
- 5.0
- DOI码：
- 10.1016/j.ijepes.2024.110197
- 论文名称：
- Linear Time-Periodic Theory-based Novel Stability Analysis Method for Voltage-Source Converter under Unbalanced Grid Conditions
- 发表刊物：
- International Journal of Electrical Power & Energy Systems
- 关键字：
- Floquet theory; Harmonic State-Space (HSS); Linear Time-Periodic (LTP) system; Modal analysis; Small-signal stability; Unbalanced grids; Voltage-Source Converter (VSC)
- 摘要：
- Small-signal stability analysis is essential for the safe operation and parameter design of power electronic-dominated grids. Unbalanced conditions introduce more frequency-coupling terms, which are unneglectable in the stability assessment. This paper proposes a novel Linear Time-Periodic (LTP) theory-based stability analysis method and focuses on grid-connected voltage-source converters (VSCs) without improved unbalancing controls. Firstly, the analysis of fundamental solutions of the LTP system reveals that each LTP mode is characterized by a unique damping factor and multiple oscillation frequencies, defined by LTP eigenvalues and related transformation vectors. Then, a method for calculating is proposed using the characteristic matrix of the Harmonic State-Space (HSS) model. An iterative sorting method based on the time-domain interpretation of HSS eigenvalues/eigenvectors is proposed to determine accurate in the case of the minimum truncation order. Finally, generalized definitions and calculation methods of the widely used indicators for modal analysis are presented to assess system stability and guide the parameter design. Numerical and simulation results verify the proposed stability analysis method and indicate its advantages compared to the existing Floquet and HSS methods.
- 合写作者：
- Yueming Ji,Hao Qi,Xintong Liu,Yinan Xiang,Jun Liu
- 第一作者：
- Hanwen Gu
- 论文类型：
- 期刊论文
- 通讯作者：
- Zaibin Jiao
- 卷号：
- 161
- 期号：
- 110197
- 页面范围：
- 1 - 6, International Journal of Electrical Power & Energy Systems
- 是否译文：
- 否
- 发表时间：
- 2024-10-15
- 收录刊物：
- SCI