大规模风电并网对互联电力系统低频振荡影响研究  

INFLUENCE OF LARGE SCALE GRID CONNECTED WIND POWER ON LOW FREQUENCY OCILLATION OF INTERCONNECTED POWER SYSTEM

作　　者：杨悦[1,2] 李国庆[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]东北电力大学电力系统安全运行与节能技术国家地方联合工程实验室,吉林132012

出　　处：《太阳能学报》2017年第10期2665-2674,共10页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51377016;51477027)

摘　　要：应用模态分析法研究改变风电场调度方式、机端电压控制环节以及风电渗透率,含大规模风电场的互联系统低频振荡特性;对基于相空间重构的小波算法进行改进,改进后的基于相空间重构的小波算法所需数据量小,具有较高的识别精度和较好的抗噪能力,能够揭示出受到噪声污染的微弱信号内在动力学特性;应用基于相空间重构的改进小波算法对互联系统联络线实测功率进行分析,与模态分析结果互为验证。结果表明,风电场调度方式与风电渗透率的变化会影响区域间低频振荡,而机端电压控制环节对区域间低频振荡影响不大。增加风电机组出力,并协调同步发电机组控制有助于增大区域间低频振荡阻尼,提高含大规模风电场的电力系统稳定性。The modal analysis method is used to study how to change the wind farm scheduling mode, the machine terminal voltage control link and the wind power permeability, also study the low frequency oscillation characteristics of the interconnected system of large scale wind farm. The wavelet algorithm based on phase space reconstruction is improved, and the improved wavelet algorithm based on phase space reconstruction needs a small amount of data and has high recognition precision and good anti-noise ability, and can reveal the inherent dynamics of the weak signal polluted by noise. The improved wavelet algorithm based on phase space reconstruction is used to analyze the measured power of the interconnected system tie line, the results and modal analysis results verify each other. The results show that the change of wind farm scheduling mode and the wind power permeability will affect inter-area low-frequency oscillation, and the machine terminal voltage control link will affect inter-area low-frequency oscillation a little. Increasing the output of the wind turbine and coordinating the control of the synchronous generator set will help to increase the inter-area low- frequency oscillation damping and improve the stability of the power system with large scale wind farm.

关 键 词：大规模风电场 低频振荡 阻尼比 基于实时量测信息分析法 模态分析法 

分 类 号：TM712[电气工程—电力系统及自动化]