山东电力技术2024，Vol.51Issue(11)：48-60,13.DOI:10.20097/j.cnki.issn1007-9904.2024.11.005
基于阻抗分析法的双馈风电机组经串补线路并网系统的次同步振荡特性研究
Research on Subsynchronous Oscillation of Doubly-fed Wind Turbines Connected by Series Compensating Lines Based on Impedance Analysis Method
摘要
Abstract
With the large-scale grid-connection of wind power,the sub-synchronous oscillation of doubly-fed wind turbines easily occurs in the grid-connection system through serial compensation lines.Firstly,the equivalent circuit model of the grid-connected system of doubly-fed wind turbines is established through serial complement by using the impedance analysis method,considering the converters on the rotor side and grid side,and the equivalent impedance expression of the grid-connected system is theoretically deduced,the influence of different controller parameters and serial complement on equivalent resistance and equivalent reactance is analyzed in detail,and the generation mechanism of sub-synchronous oscillation is revealed.Then,the eigenvalue method and time domain simulation method are used to verify the validity of the proposed research method.The results show that the error is larger when both the rotor side and the network side are not considered,and the accuracy is closer to the actual value when both the rotor side and the network side are considered.Considering only the rotor side and the full consideration are basically the same,considering the network side has little effect on the sub-synchronous oscillation.The damping ratio and frequency of sub-synchronous oscillation are mainly affected by the rotor side control parameters,especially the inner ring ratio and inner ring integral parameters.The damping ratio and frequency of the subsynchronous oscillation decrease gradually with the increase of the series complement.The physical significance of impedance analysis is clear,and the influence of relevant parameters of the system can be directly found,which gives the research work greater value.关键词
双馈风电机组/次同步振荡/阻抗分析/特征值法Key words
doubly-fed wind turbine/subsynchronous oscillation/impedance analysis/eigenvalue method分类
信息技术与安全科学引用本文复制引用
袁慧涛,袁文涛,王文敬,胡国华,曾宪振..基于阻抗分析法的双馈风电机组经串补线路并网系统的次同步振荡特性研究[J].山东电力技术,2024,51(11):48-60,13.基金项目
国网山东省电力公司科技项目"计及高比例新能源及储能接入的多级多元AGC协同控制技术研究"(SGSDHZ00DKJS2200367). Science and Technology Project of State Grid Shandong Electric Power Company"Research on Multi-level and Multi-tyge AGC Collaborative Control Technology With High Proportion of New Energy and Energy Storage"(SGSDHZ00DKJS2200367). （SGSDHZ00DKJS2200367）
