电力系统自动化2025，Vol.49Issue(13)：43-51,9.DOI:10.7500/AEPS20241028001
基于导纳稳定容量的新能源并网强度评估
Evaluation of Grid-connected Strength for Renewable Energy Based on Admittance Stability Capacity
摘要
Abstract
As the penetration rate of renewable energy in new power systems continues to increase,the dynamic behavior of power systems undergoes significant changes,and the stability analysis of the systems becomes increasingly complex after integrating power electronic devices such as converters.Based on eigenvalue sensitivity analysis of components,this paper introduces an evaluation index of grid-connected strength that considers the differences in control details of converters.First,a full-system impedance modeling of multi-feed systems is conducted,and the sensitivity of eigenvalues to specific admittance changes is analyzed.Next,the admittance stability capacity(ASC)is defined,rooted in the physical essence of the maximum variation in converter admittance at grid-connected points of renewable energy.The ASC captures the dynamic characteristics of all system components,and thus describes the anti-interference capability of the system and the grid strength of the grid-connected point for renewable energy.Finally,the effectiveness of the proposed index is verified using a single-converter connected to an infinite bus system and a modified 14-bus system.关键词
新型电力系统/小信号/特征值/导纳稳定容量/灵敏度/变流器/并网强度/新能源Key words
new power system/small-signal/eigenvalue/admittance stability capacity(ASC)/sensitivity/converter/grid-connected strength/renewable energy引用本文复制引用
吴林林,邓晓洋,郑佳杰,梁以宁,郑乐..基于导纳稳定容量的新能源并网强度评估[J].电力系统自动化,2025,49(13):43-51,9.基金项目
国网冀北电力有限公司科技项目(52018K23000K). This work is supported by State Grid Jibei Electric Power Co.,Ltd.(No.52018K23000K). （52018K23000K）
