基于频域贡献因子的混合风电场内振荡源在线定位研究  

Online Localization of Oscillation Sources in Hybrid Wind Farms Based on Frequency Domain Contribution Factors

作　　者：郑天悦 焦典 周雨豪 赵文瑞 章海静 邓俊 王彤[2] ZHENG Tianyue;JIAO Dian;ZHOU Yuhao;ZHAO Wenrui;ZHANG Haijing;DENG Jun;WANG Tong(Power Research Institute of State Grid Shaanxi Electric Power Company Limited,Xi’an 710100,Shaanxi,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国网陕西省电力有限公司电力科学研究院,陕西西安710100 [2]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电网与清洁能源》2023年第4期118-128,共11页Power System and Clean Energy

基　　金：国家自然科学基金项目(51637005);国网陕西省电力有限公司科技项目(5226KY20001Q)。

摘　　要：随着风电、光伏和SVG等各种电力电子设备并网比例的增加,新能源电力系统振荡风险加剧,精准定位风电场站内振荡源对预防振荡引发大规模电力事故的意义重大。提出了基于频域贡献因子分析混合风电场内振荡源在线定位方法。首先,基于大型混合风电场站的节点导纳矩阵推导出频域贡献因子;然后通过便于工程实现的在线阻抗辨识得到风电场阻抗特性,并进行模态机理分析得到风电场的主导振荡模态;然后求出混合风电场的振荡贡献因子;基于贡献因子确定场站内振荡的主要贡献节点以实现振荡源定位并量化分析;采用机理分析替代数值法得到风电场站的主导振荡模态,避免了计算量大与收敛性不足的问题。最后基于ADPSS/ETSDAC平台对大型混合风电场中双馈风机与串补电容交互振荡和直驱风机与SVG交互振荡分别进行仿真验证所提方法的有效性。With increase of the grid connection proportion of various power electronic equipment such as wind power,photovoltaic and SVG,the oscillation risk of the power system with renewable energy has intensified.Accurate positioning of the oscillation sources in the wind farm is of great significance to prevent large-scale power accidents caused by oscillation.An online location method of oscillation source in a hybrid wind farm based on frequency domain contribution factor analysis is proposed.First,based on large-scale hybrid wind farms,frequency domain contribution factor is deduced by nodal admittance matrix.Second,the impedance characteristics of the wind farms are obtained through online impedance identification which is suitable for engineering realization.Third,the impedance characteristics of the wind farm are obtained through online impedance identification,which is convenient for engineering implementation,and the leading oscillation mode of the wind farm is obtained through modal mechanism analysis.Then,the oscillation contribution factor of the hybrid wind farm is calculated;based on the contribution factor,the main contribution nodes of the oscillation in the wind station are determined to realize the location and quantitative analysis of the oscillation source;the mechanism analysis is used to replace the numerical method to obtain the dominant oscillation mode of the wind farm station,which avoids the problems of large calculation amount and insufficient convergence.Finally,based on the ADPSS/ETSDAC,the proposed method is validated by simulation of the interactive oscillation between the DFIGs and the series compensation capacitor and the interactive oscillation between PMSGs and SVG in large-scale hybrid wind farm.

关 键 词：风电场 静止无功发生器 振荡源定位 振荡模态 贡献因子 风电系统 

分 类 号：TM712[电气工程—电力系统及自动化]