基于振荡中心迁移的风机并网后电力系统暂态稳定耦合分析  

A Coupling Analysis of Transient Stability of Power System with Grid-Connected Wind Power Based on Oscillation Center Transfer

作　　者：马成廉 张敉 刘洪波 孙黎 MA Chenglian;ZHANG Mi;LIU Hongbo;SUN Li(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,Jilin,China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林吉林132012

出　　处：《电网与清洁能源》2024年第12期102-110,共9页Power System and Clean Energy

基　　金：国家电网公司科技项目(5100-202226021A-1-1-ZN)。

摘　　要：随着近年来风机装机容量的迅速提升,电力系统暂态过程中的功角失稳和电压失稳交互现象变得更加复杂。根据不同系统模型,分析了风电接入后对振荡中心迁移的影响,表明随着风电并网容量的增大,系统振荡中心将朝着远离风电并网位置即靠近负荷的方向进行迁移;证明了振荡中心靠近负荷侧时,系统的电压和功角稳定问题相互耦合程度加深;通过耦合指标的计算,进一步对风机接入对系统耦合失稳程度进行量化评估。最后通过在双机单负荷系统和某省网实际系统的仿真验证本结论的正确性。With a rapid increase in the installed capacities of wind power in recent years,the interaction between power angle instability and voltage instability in the transient process of the power system has become more complex.Based on different system models,the paper explores the impact of wind power integration on the migration of the oscillation center,indicating that as the capacity of wind power connected to the grid increases,the system’s oscillation center will migrate away from the wind power access position,that is,towards the load side;it is proven that the coupling of voltage and power angle stability is most obvious when the center of oscillation is closer to the load side.Through the calculation of coupling indexes,a quantitative assessment of the degree of coupling instability caused by wind power access is conducted further.Finally,the correctness of this conclusion is verified through simulations in a two-machine single-load system and a real system in Sichuan Province.

关 键 词：风电 振荡中心迁移 暂态稳定 耦合机理 

分 类 号：TM712[电气工程—电力系统及自动化]