基于扫频阻抗法的变压器匝间短路故障检测  

Detection of Short Circuit Fault Between Transformer Windings Based on Sweep Frequency Impedance Method

作　　者：孙翔[1] 何文林[1] 邱炜[1] 刘勇[2] 汲胜昌[2] 杨帆[2] 

机构地区：[1]国网浙江省电力公司电力科学研究院,杭州310014 [2]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：《高压电器》2016年第3期29-33,共5页High Voltage Apparatus

基　　金：国网浙江省电力公司科技项目(5211011306X9)~~

摘　　要：文中以一种新型变压器绕组检测方法——扫频阻抗法为理论依据,建立了试验室测试系统,并利用该系统对单相双绕组变压器进行了测试。其结果表明:扫频阻抗法能够有效反映变压器绕组分布式参数,且其测试结果在频率大于11.5 k Hz时与频响曲线呈现轴对称关系;短路故障会造成50 Hz处阻抗值与相关系数皆发生变化,且故障越严重,阻抗值与相关系数的变化越明显。A laboratory measurement system is set up to test a single phase transformer with two windings by means of the novel sweep frequency impedance（SFI） method. The test results show that： 1）SFI curve can effectively reflect the distributed parameters of the transformer winding, and it displays axisymmetric relationship with the frequency response curve obtained in the same test condition for the frequency range from 11.5 k Hz to 1 MHz; and 2）Short circuit fault results in changes in both SFI and correlation coefficient at frequency of 50 Hz in the SFI curve, and the more serious the short circuit fault, the more obvious these changes.

关 键 词：频率响应分析法 短路阻抗法 扫频阻抗法 短路故障 

分 类 号：TM403.2[电气工程—电器]