10kV异步电动机定子绕组老化槽放电指纹分布规律的研究  

Slot Discharge Fingerprint Distribution of 10 kV Asynchronous Motor Stator Windings in the Case of Insulation Degradation

作　　者：李传扬[1] 宋建成[1] 吝伶艳[1] 毕小玉[1] 王秀秀[1] 

机构地区：[1]太原理工大学煤矿电气设备与智能控制控制山西省重点实验室,太原030024

出　　处：《高压电器》2015年第2期35-43,共9页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(513771137);山西省自然基金项目(2014011024-3)~~

摘　　要：在10 kV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10 kV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10 kV电动机绝缘在线监测和寿命评估提供了判断依据。In the manufacturing process of a certain resistance is often adopted to cover the slot. However, due to the electromagnetic force 10 kV asynchronous motor, a semi-conductive layer with linear part of coil to suppress the partial discharge in the which exists when the motor is running, slot discharge is still one of the main causes of stator insulation fault. In this paper, a width adjustable slot model with a monolayer coil is designed to investigate the distribution patterns of slot discharge fingerprint for a class F 10 kV asynchronous motor＇s stator winding insulation with varying aging degrees. The variation law of slot discharge fingerprint with voltage is obtained by extracting the characteristic quantity of discharge at different aging degrees of stator winding. This study may provide a reference for online monitoring and life assessment of 10 kV motor insulation.

关 键 词：10 kV异步电动机 定子绝缘 槽放电 放电指纹 绝缘老化 

分 类 号：TM343[电气工程—电机]