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广义Hamilton多机电力系统的广域时滞阻尼控制

DOI: 10.13334/j.0258-8013.pcsee.2014.34.023, PP. 6199-6208

Keywords: 多机电力系统,广义Hamilton系统,广域阻尼控制,时滞,广域测量系统

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Abstract:

随着跨区送电量的需求增加,大量功率需要进行远距离传输,因而抑制区域间的功率振荡仅靠局部反馈信号设计的控制器已难以保证整个系统的稳定运行。因此,含有时滞影响的广域控制器的分析和设计是近年来互联电网研究的热点之一。基于Hamilton系统理论,建立对应的广域测量电力系统的非线性时滞广义Hamilton模型,并以此模型为基础,给出相应的Lyapunov-Krasovskii泛函并推导出以矩阵不等式为形式的时滞依赖稳定性判据,注意到控制输入含有时滞信号的影响,设计出相应的广域阻尼控制器(wide-areadampingcontroller,WADC),实现了含有时滞的广域反馈控制,并计算出能使闭环电力系统稳定的时滞裕度,权衡WADC的阻尼性能与时滞裕度之间的关系,从而给出对应的WADC控制参数。最后以16机68节点系统为例,用时域仿真的结果来说明所提时滞控制方法的有效性。

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