基于特征值灵敏度的直驱风机并网系统功率振荡特性分析  

Analysis of Power Sub-synchronous Oscillation Characteristics of Grid-connected PMSG System Based on Eigenvalue Sensitivity

作　　者：石铭森 杨成 SHI Mingsen;YANG Cheng(Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学,吉林吉林132012

出　　处：《吉林电力》2025年第2期8-13,45,共7页Jilin Electric Power

基　　金：国家自然科学基金委员会-国家电网公司智能电网联合基金资助项目(U186660001)。

摘　　要：针对直驱风机并网系统出现的功率次同步振荡(Sub-Synchronous Oscillation,SSO)问题,为了分析功率次同步振荡的主导因素与诱发机理,建立了适用于直驱风机并网系统功率次同步振荡的状态空间模型,基于特征值灵敏度方法分析了影响系统次同步振荡模式的主导参数。结果表明,直驱风机并网系统功率次同步振荡受电网强度、运行工况和控制参数等多种因素的影响,随着电网强度降低,直驱风机运行在低工况时更容易诱发SSO;直流电压控制与交流电流控制参数设置不当也是诱发SSO的主要因素。并通过在PSCAD/EMTDC搭建直驱风机并网系统仿真模型验证了理论分析的有效性,可以为系统控制器参数的优化配置提供理论支持。Aiming at the power sub-synchronous oscillation(SSO)in grid-connected permanent magnet synchronous generator(PMSG)system,in order to analyze the dominant factors and inducing mechanism of SSO,in this paper,a state-space model suitable for SSO of grid-connected PMSG is established,and the dominant parameters affecting the SSO mode are analyzed based on eigenvalue sensitivity method.The results indicate that SSO is influenced by various factors such as grid strength,operating conditions,and control parameters.As the grid strength decreases,the grid-connected PMSG system is more likely to induce SSO when operating under low operating conditions.Improper parameter settings for DC-voltage control and AC-current control are also the main factors inducing SSO.The effectiveness of the theoretical analysis was verified by building a simulation model of grid-connected PMSG system in PSCAD/EMTDC,which can provide theoretical support for optimizing the configuration of system controller parameters.

关 键 词：直驱风机并网 次同步振荡 特征值灵敏度 控制器参数 仿真模型 

分 类 号：TM712[电气工程—电力系统及自动化]