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基于SCADA运行数据的风电机组塔架振动建模与监测

, PP. 128-136

Keywords: 数据采集与监视控制系统(SCADA),状态监测,塔架振动,非线性状态估计(NSET),风电机组

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Abstract:

振动信号是风电机组数据采集与监视控制(supervisorycontrolanddataacquisition,SCADA)系统中的一类重要变量。对振动信号的建模和分析可以实现对机组重要部件如塔架、传动链、叶轮等的状态监测工作。采用非线性状态估计技术(nonlinearstateestimatetechnique,NSET)作为建模方法,在对风电机组塔架振动特性及其影响因素进行细致分析的基础上,建立了塔架振动模型。该模型由额定风速以下和额定风速以上两部分子模型构成。同时,对非线性状态估计技术的物理意义及特点进行了深入的分析和探讨。在某风电机组2006年4至6月份SCADA数据的基础上,建立了覆盖其正常工作状态的塔架振动模型,并对该模型进行了验证。研究表明,基于NSET的塔架振动建模方法具有方法简单、物理意义明确和建模精度高等优点,为后续拟开展的风电机组振动状态监测和早期故障诊断打下了良好的基础,同时为风电机组振动分析提供了新的思路。

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