南方电网技术2026，Vol.20Issue(4)：75-86,12.DOI:10.13648/j.cnki.issn1674-0629.2026.04.007
基于阻抗聚合和s域节点导纳矩阵的电力系统谐振稳定性分析方法
Resonance Stability Analysis Method for Power Systems Based on Impedance Aggregation and s-Domain Node Admittance Matrix
摘要
Abstract
Due to the negative resistance characteristics of power electronic devices,high-penetration renewable energy power systems face significant resonance stability issues.Limited by heavy high-order determinant computations,the conventional s-domain node admittance matrix method becomes inefficient for large systems.To address this problem,the s-domain node admittance matrix method is optimized by impedance aggregation,enabling fast resonance stability analysis for high-penetration renewable energy power systems.Firstly,the s-domain impedance models of typical components in high-penetration renewable energy power systems are presented,together with the procedures of the conventional s-domain node admittance matrix method.Next,a general impedance aggregation method independent of system topology and scale is proposed.The partial inheritance of resonance modes and node volt-age mode shapes in impedance-aggregated systems is revealed,and regional observability and regional linkage are introduced to distinguish global modes and local modes.Then,node numbering rules and analysis procedures for the optimized method are developed,transforming the resonance stability analysis for the complete system into a collection of subsystem analyses,and the ef-ficiency improvement is verified in terms of asymptotic computational complexity.Finally,resonance stability analysis is conducted on an offshore wind power system in Zhejiang Province,validating the effectiveness of the proposed method.关键词
谐振稳定性/s域节点导纳矩阵/阻抗聚合/谐振模态/节点电压振型/区域可观度/区域耦合度Key words
resonance stability/s-domain node admittance matrix/impedance aggregation/resonance mode/node voltage mode shape/regional observability/regional linkage分类
信息技术与安全科学引用本文复制引用
何冰鑫,李探,李志闯,郭勇帆,张哲任,徐政,宾子君..基于阻抗聚合和s域节点导纳矩阵的电力系统谐振稳定性分析方法[J].南方电网技术,2026,20(4):75-86,12.基金项目
国家电网有限公司科技项目(5200-202356483A-3-2-ZN). Supported by the Science and Technology Project of State Grid Corporation of China(5200-202356483A-3-2-ZN). （5200-202356483A-3-2-ZN）
