基于双馈风机抗阻比的次同步振荡抑制策略  

Sub-synchronous oscillation mitigation strategy based on DFIG’s ratio of reactance to resistance

作　　者：李志军[1,2] 刘洋 张家安[1,2] LI Zhijun;LIU Yang;ZHANG Jiaan(Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,Hebei University of Technology,Tianjin 300130,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tianjin 300130,China;School of Artificial Intelligence,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学河北省电磁场与电器可靠性重点实验室,天津300130 [2]河北工业大学省部共建电工装备可靠性与智能化国家重点实验室,天津300130 [3]河北工业大学人工智能与数据科学学院,天津300130

出　　处：《电力自动化设备》2022年第8期140-145,152,共7页Electric Power Automation Equipment

基　　金：河北省科技支撑计划项目(15212105D)。

摘　　要：现有的抑制双馈风机次同步振荡(SSO)的方法大多以转子转速偏差信号作为输入,需要较大增益的同时可能会引起超同步振荡。利用双馈风电场-串联补偿输电系统的复频域阻抗模型,将基于双馈风机网侧变流器的阻尼控制等效为虚拟阻抗,解释了双馈风机在不同抗阻比以及不同补偿角度下的作用机理;基于以线路电流为输入的次同步阻尼控制方法,提出了改进的基于双馈风机抗阻比设计最佳补偿角度的阻尼控制策略及参数整定方法。以真实风电场SSO事件为算例,在MATLAB/Simulink平台搭建双馈风电场-串联补偿输电系统的等值模型,通过时域仿真验证了所提阻尼控制策略的效果。Most of the existing methods to mitigate the SSO(Sub-Synchronous Oscillation)of DFIG(Doubly-Fed Induction Generator)take the rotor speed deviation signal as the input,which may cause super-synchronous oscillation and require large gain.Based on the impedance model of DFIG-based wind farm-series compensation power transmission system in complex frequency domain,the damping control based on grid side converter is equivalent to virtual impedance,and the action mechanism of DFIG under different ratios of reactance to resistance and different compensation angles is explained.Based on the sub-synchronous damping control method with line current as input,an improved damping control strategy and parameter setting method for designing optimal compensation angle based on DFIG’s ratio of reactance to resistance are proposed.Taking the SSO events of real wind farms as the examples,the equivalent model of DFIG-based wind farmseries compensation power transmission system is built on MATLAB/Simulink platform,and the effectiveness of the proposed damping control strategy is verified by time-domain simulation.

关 键 词：次同步振荡 串联补偿 双馈风机 抗阻比 次同步阻尼控制 振荡抑制 

分 类 号：TM614[电气工程—电力系统及自动化] TM712