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电网技术  2011 

励磁系统中附加调差对电力系统振荡模式的阻尼影响

, PP. 65-70

Keywords: 励磁系统,附加调差,菲利蒲-海佛隆模型,同步转矩,阻尼转矩

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Abstract:

将附加调差引入菲利蒲-海佛隆模型,分析附加调差对模型参数的影响,推导出附加调差提供的阻尼转矩系数增量?KD随附加调差系数XC的变化是一条二次抛物线,且这条抛物线的特性与励磁参数、发电机参数、运行状况及线路参数有关。证明了此抛物线在以?KD为纵轴、以XC为横轴的坐标系中必经过原点,且与横轴的第2个交点随发电机功角变化而单调变化。根据此抛物线可全面说明附加调差对系统阻尼的影响情况。两机系统及实际互联电网各典型振荡模式的计算结果与理论推导吻合。

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