行波反射法在变压器绕组匝间短路故障定位中的应用

针对变压器绕组轻微匝间短路难以检测的问题,提出利用行波反射波的电压幅值进行匝间短路故障定位的方法。通过在变压器绕组线端输入单个低压脉冲以获取行波反射信号,从采集到的行波反射信号中提取相应的波峰电压幅值,以此作为故障诊断的电气量。根据匝间短路后对应匝波阻抗改变引起的反射电压突变,来实现匝间短路故障定位。仿真结果表明所提方法简单可行。...

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Bibliographic Details
Published in电力系统保护与控制 Vol. 44; no. 21; pp. 84 - 89
Main Author 李卓昕 彭敏放 黄清秀 万勋 刘达
Format Journal Article
LanguageChinese
Published 湖南大学电气与信息工程学院,湖南长沙,410082%湖南大学电气与信息工程学院,湖南长沙410082 2016
国网湖南省电力公司电力科学研究院,湖南长沙410007
Subjects
匝间短路
变压器
故障定位
波阻抗
行波反射法
变压器
匝间短路
inter-turn short circuit
故障定位
traveling wave reflection method
波阻抗
fault location
行波反射法
transformer
wave impedance
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ISSN1674-3415
DOI10.7667/PSPC151917

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Summary:针对变压器绕组轻微匝间短路难以检测的问题,提出利用行波反射波的电压幅值进行匝间短路故障定位的方法。通过在变压器绕组线端输入单个低压脉冲以获取行波反射信号,从采集到的行波反射信号中提取相应的波峰电压幅值,以此作为故障诊断的电气量。根据匝间短路后对应匝波阻抗改变引起的反射电压突变,来实现匝间短路故障定位。仿真结果表明所提方法简单可行。
Bibliography:Aiming at the problem that the transformer winding is difficult to detect the fault of the inter-turn short circuit, the method of using the voltage amplitude of the traveling wave reflected wave to locate the fault location is proposed. It inputs a low voltage pulse into winding wire end to obtain the traveling wave reflection signal and extracts the traveling wave reflected signal from the peak voltage amplitude, which is used as the electric quantity of the fault diagnosis. According to the change of the reflected voltage caused by the turn to turn short circuit, the fault location of the inter-turn short circuit fault is realized. The simulation result shows that the proposed method is simple and feasible.
LI Zhuoxin1, PENG Minfang1, HUANG Qingxiu1, WAN Xun1＇ 2 LIU Da1 （1. College of Electrical and Information Engineering, Hunan University, Changsha 410082, China; 2. State Grid Hunan Electric Power Corporation Research Institute, Changsha 410007, China）
transformer; traveling wave reflection method; wave im
ISSN:1674-3415
DOI:10.7667/PSPC151917