发电机定子线棒绝缘老化后不同部位参数比较  

STUDY ON AGING STATE OF WINDING INSULATION IN DIFFERENT POSITION BY SEVERAL METHODS

作　　者：吴鹏[1] 刘丽兵[1] 陈志勇[1] 高乃奎[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2004年第5期23-24,49,共3页High Voltage Engineering

摘　　要：分别测量与研究了大型发电机主绝缘的槽部、出槽口和端部这 3个不同部位的真机线棒绝缘的tanδ、超声声速、动态力学参数和绝缘强度等 4种参数。试验研究发现出槽口附近的主绝缘老化最为严重 。Ground-wall insulation of end-windings, ground-wall insulation in the slots and ground-wall insulation between above two positions have been obtained from a large generator that has been operated 18 years. Several parameters (tan δ , ultrasonic detecting, DMA, dielectric strength) of the above three positions of the samples have been tested and studied. The test results show that the aging extent of ground-wall insulation between end-windings and the slots 1s the most serious. This conclusion is important in maintenance of large generator and estimating aging state of ground-wall insulation.

关 键 词：大型发电机 定子线棒 绝缘老化 绝缘强度 动态力学分析 

分 类 号：TM31[电气工程—电机]