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电网技术  2015 

双馈异步发电机风电场聚合模型研究

DOI: 10.13335/j.1000-3673.pst.2015.07.018, PP. 1879-1885

Keywords: 风力发电,双馈风电机组,风电场,等值建模,聚合模型

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Abstract:

提出了一种风电场内输入风速不同的多台风电机组的单机等值建模方法。在机组参数相同的条件下,以风电场的有功功率及无功功率输出、动能的变化率、传动链损耗保持不变为原则,对机组的风轮、传动链、发电系统及主控系统进行等值变换,给出了相关参数的计算方法,同时给出了等值风速的计算方法。以“在公共连接点短路阻抗相等”为原则,对风电场内的电力网络进行单阻抗等效。建立了包含4台参数相同的2MW双馈风电机组风电场详细模型和相应的等值模型,通过仿真分析分别对比这2种模型在随机风速和电网故障情况下的输出特性。结果表明,该方法得到的等值聚合模型具有很高的精度,适用于具有相同参数双馈风电机组的风电场建模。

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