电力系统自动化2025，Vol.49Issue(12)：69-78,10.DOI:10.7500/AEPS20240515021
复杂网络下多分布式新能源集群小信号等值建模方法
Small-signal Equivalent Modeling Method for Multiple Distributed Renewable Energy Clusters Under Complex Network
摘要
Abstract
Dynamic coupling between the distributed renewable energy and the external grid may adversely affect the small-signal stability of the system.However,at present,the study on small-signal equivalent modeling of multiple distributed renewable energy clusters(DRECs)is deficient,and the stability analysis of complex system is computation-intensive and inefficient.Focused on this problem,the admittance model of multiple DRECs integrated system is firstly built by combining the admittance model of renewable energy generators,loads and other devices with the node impedance matrix of the grid.Secondly,considering complex network topology,the renewable energy generators are divided into several groups based on the strength of dynamic coupling.Via the similar transformation on admittance/impedance matrices of the generators and the grid,each group is aggregated into a single generator.Hence,small-signal equivalent representation of the system is obtained.The obtained equivalent model effectively reduces the calculation amount of stability analysis of the system and is easy to reconstruct when the working condition changes.Finally,the effectiveness of the proposed method is verified via case studies.关键词
分布式新能源集群/小干扰稳定/等值模型/阻抗模型Key words
distributed renewable energy cluster/small-signal stability/equivalent model/impedance model引用本文复制引用
吴林林,苏田宇,卜海棠,董文凯,谢小荣,王潇..复杂网络下多分布式新能源集群小信号等值建模方法[J].电力系统自动化,2025,49(12):69-78,10.基金项目
华北电力科学研究院有限责任公司科技项目(KJJ2022091) （KJJ2022091）
国家自然科学基金重点支持项目(U22B20100). This work is supported by North China Electric Power Research Institute Co.,Ltd.(No.KJJ2022091)and National Natural Science Foundation of China(No.U22B20100). （U22B20100）
