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arXiv 2609.10774eess.SYcs.SY

基于阻抗的灵敏度分析:利用构网型变流器增强弱电网下LCC-HVDC联络线稳定性

Impedance-Based Sensitivity Analysis for Stability Enhancement of LCC-HVDC Links Connected to Weak Grids Using Grid-Forming Converters

Luis A. Garcia-Reyes, Anup Joshi, Javier Renedo, Macarena Martin-Almenta, Oriol Gomis-Bellmunt, Eduardo Prieto-Araujo, Vinicius A. Lacerda, Xavier Guillaud

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中文总结 AI 辅助

本文提出基于频域阻抗的灵敏度分析方法,结合广义奈奎斯特判据和模态分解,评估并增强弱电网下LCC-HVDC联络线稳定性,验证表明集成构网型变流器可显著提升稳定裕度。

中文摘要 AI 辅助

本文提出了一种基于频域阻抗的灵敏度方法,用于弱电网条件下运行的电网换相换流器高压直流(LCC-HVDC)联络线的稳定性评估与增强。该方法集成了针对黑箱系统的频域辨识、用于多变量稳定性评估的广义奈奎斯特判据(GNC),以及模态阻抗分解与参与因子分析,以定位并解释交互机制。该方法在LCC-HVDC基准模型的详细线性化状态空间模型和非线性电磁暂态(EMT)仿真中得到了验证。一项改变电网短路比(SCR)的灵敏度研究揭示了独立LCC-HVDC联络线的稳定极限,并证明集成构网型电压源换流器(GFM-VSC)可显著提高稳定裕度。

英文摘要

This paper presents a frequency-domain, impedance-based sensitivity methodology for stability assessment and enhancement of line-commutated converter HVDC (LCC-HVDC) links operating under weak-grid conditions. The methodology integrates frequency-domain identification tailored for black-box systems, the Generalized Nyquist Criterion (GNC) for multivariable stability assessment, and modal impedance decomposition with participation-factor analysis to locate and interpret interaction mechanisms. The approach is validated against a detailed linearized state-space model and nonlinear EMT simulations of an LCC-HVDC benchmark. A sensitivity study varying the grid short-circuit ratio (SCR) reveals a stability limit for the standalone LCC-HVDC link and demonstrates that the integration of a grid-forming voltage source converter (GFM-VSC) substantially increases the stability margin.

发表机构

  • CITCEA-UPC Barcelona(巴塞罗那自治大学电力与电子工程研究中心)
  • L2EP - Centrale Lille(里尔中央理工学院电气工程和公共服务中心)
  • Red Eléctrica - Redeia(西班牙国家电网公司)

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