配网变绕组绝缘击穿快速识别技术讨论  

Discussion on the fast identification of insulation breakdown for transformer winding in distribution network

作　　者：周林[1] 曹宣艳[1] 梁正波[1] 

机构地区：[1]毕节供电局,贵州毕节551700

出　　处：《贵州电力技术》2015年第11期47-48,59,共3页Guizhou Electric Power Technology

摘　　要：基于频响法检测的配网变绕组变形测试方法主要有传输增益法和阻抗电流法,传输增益法由于对硬件要求相对较低,获取的特征图谱简单直观,得到了大量应用。但对于匝间绝缘击穿现象,通过频响法尽管能发现异常但不能识别是否为匝间击穿故障。而早期的匝间绝缘击穿通过直流电阻等难以反映出来,因此本篇提出了基于阻抗电流向量分析方法用于配网变的匝间绝缘击穿快速识别,介绍了实现框架、测试注意事项,浅要分析了基于阻抗电流向量的匝间绝缘判别方法。The test methods for the transformer winding in distribution network based on frequency response were mainly the transmission efficiency method and resistance current method. The former was largely adopted because the requirement for hardware was low and the obtaining of featured diagram was simple and straight. However for the insulation breakdown, the frequency response could find the anomaly but fail to identify if it was the inter-turn insulation failure. The early inter turn insulation breakdown was hard to he revealed by DC resistance. Thus in this paper, the resistance current vector analysis method was proposed to identify the inter-turn insulation breakdown fast. The realization framework and the test points for attention was introduced. The resistance current vector analysis method was analyzed.

关 键 词：配网变压器 阻抗电流 向量 

分 类 号：TM85[电气工程—高电压与绝缘技术]