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计及广域信号时变时滞影响的大型双馈风力发电系统附加鲁棒阻尼控制

, PP. 246-255

Keywords: 大型双馈风力发电系统,广域时滞阻尼控制,风电场,时滞,线性矩阵不等式,功率振荡

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Abstract:

大规模风电接入互联电力系统可能会导致电网联络线上严重的功率振荡。大型双馈风力发电系统能独立控制有功和无功功率,可以通过将控制信号附加到有功功率控制环节来调节输出的有功,以此用来阻尼系统功率振荡。针对系统中可能存在的功率振荡,采用广域测量数据并选择合适的反馈信号实现了快速的广域时滞阻尼控制。在建立的电力系统线性化模型中考虑了广域测量信号时滞。基于自由权矩阵方法获得了线性化模型标准化时滞鲁棒控制方法,可以由线性矩阵不等式进行求解。在此基础上,设计得到了广域时滞状态反馈控制器。控制器参数可以通过所提出的LMI迭代算法优化得到。结合状态观测理论获得了一种新型广域时滞输出反馈控制器。基于四机两区域仿真模型建立了含风电接入的互联电力系统研究模型。时域仿真表明,所提出的广域时滞阻尼控制器能有效地阻尼系统区间振荡。

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