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多Y绕组同步电机瞬态参数的频域法数值计算

, PP. 120-127

Keywords: 多相电机,同步电机,瞬态电抗,多Y绕组,脉振电流,频率特性

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Abstract:

为计算多Y绕组同步电机任意部分Y绕组供电时的瞬态参数,提出多Y绕组同步电机瞬态参数的频域法算法。通过分析全Y或部分Y绕组供电时的派克方程,得到电机等效电路,进而定义单Y与多Y瞬态参数。通过分析各Y绕组空间合成电流矢量,得到定子各相绕组脉振电流的确定方法。此外,给出运算电抗频率特性的拟合方程。以双Y绕组同步电机为例,计算双Y绕组同步电机单Y与双Y瞬态参数,计算结果与实验结果基本吻合。计算结果表明,其单Y自感抗比单Y互感抗大,电抗差随频率增加发生波动变化,瞬态之初差异最大,稳态时差异最小。所提方法可适用于定子含多套非Y型对称绕组同步电机的瞬态参数计算。

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