直驱式风电场并网动态等值研究

摘要

随着直驱式风力发电机在电网中的比例增加，研究其精确的动态等值模型越来越重要。根据直驱式风力发电机的输出特性，提出了基于风速分群的多机等值方法。在等值计算中，考虑了直驱式风电机组并网时变压器和集电线路对等值效果的影响，并计及了尾流效应对风机输入风速的影响。所提等值方法适合于直驱式风电场并网的分析计算，具有实际工程的应用价值。%With the increasing installed capacity of direct-drive wind turbines in the power grid,the dynamic equivalent studies have become more and more important. Using the output characteristics of the direct drive wind turbine, this paper proposes a multi-machine equivalent method based on the wind speed clustering. During the equivalent calculation,the effects of transformers and collector lines for the grid integration of direct-drive wind turbines are considered,and the wake effects on the incoming wind for wind turbines are also taken int account. The proposed method is suitable for the analysis of the grid integration of direct-drive wind farms,and has engineering application values.