电力系统自动化2025，Vol.49Issue(7)：103-114,12.DOI:10.7500/AEPS20240512001
对偶视角下基于特征子系统的跟网/构网互联系统强度评估
System Strength Evaluation of Grid-following and Grid-forming Interconnected System Based on Eigen-subsystem from Dual Perspective
摘要
Abstract
The significant interactions between devices in grid-following and grid-forming interconnected systems present challenges in accurately quantifying system strength.To address this,firstly,the matching relationship between the closed-loop stability of grid-following and grid-forming systems and the open-loop network sensitivity from a dual perspective is discussed.Based on this,a power grid strength index reflecting current strength is introduced.Furthermore,the low-dimensional grid-following and grid-forming eigen-subsystems equivalent to the stability of the high-dimensional interconnected system are analytically obtained.Based on this,a two-dimensional index of the strength of the interconnected power system is proposed.This index can reflects the stability margins of both the grid-following and grid-forming eigen-subsystems simultaneously,thus enabling the effective assessment of the multi-frequency-band small-disturbance stability of the interconnected system.Combined with this index,the inference is drawn that an appropriate interconnected form of the power system is conducive to instability risk reduction of an both the grid-following and grid-forming systems simultaneously.Finally,simulations verify the effectiveness of the proposed method and the correctness of the inference.关键词
互联系统/电网强度/特征子系统/系统强度/跟网/构网Key words
interconnected system/power grid strength/eigen-subsystem/system strength/grid-following/grid-forming引用本文复制引用
冷若寒,殷波,胡光,陈航宇,丛聪,庄可好,辛焕海..对偶视角下基于特征子系统的跟网/构网互联系统强度评估[J].电力系统自动化,2025,49(7):103-114,12.基金项目
中国大唐集团科技创新有限公司资助项目(DTKC-2024-20604). This work is supported by Science and Technology Project of China Datang Technology Innovation Co.,Ltd.(No.DTKC-2024-20604). （DTKC-2024-20604）
