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高压电器  2015 

10 kV异步电动机定子绕组老化槽放电指纹分布规律的研究

, PP. 35-43

Keywords: 10kV异步电动机,定子绝缘,槽放电,放电指纹,绝缘老化

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Abstract:

在10kV异步电动机制造过程中,为抑制运行中定子槽内发生放电,常在绕组直线部分包绕一定阻值的半导电层。尽管如此,电动机在运行过程中,由于电磁力的作用,槽放电仍然是导致电动机定子绝缘故障的主要原因之一。针对这一问题,设计并制作了宽度可调单层绕组定子铁心槽部模型,研究了F级绝缘10kV异步电动机真机定子绕组绝缘在不同程度磨损老化后槽放电指纹的分布规律。通过提取表征放电特性的特征量,给出了定子绕组在不同磨损老化状态下,槽放电指纹随电压的变化规律,为10kV电动机绝缘在线监测和寿命评估提供了判断依据。

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