基于特高频谱图统计参量的局部放电定位方法研究
Research on partial discharge location method based on PRPD statistic parameters of ultra-high frequency
彭超 1阮江军 2黄道春 2雷清泉 3周瑜4
作者信息
- 1. 武汉大学电气工程学院,湖北武汉430072;中国电力科学研究院,湖北武汉430074
- 2. 武汉大学电气工程学院,湖北武汉430072
- 3. 武汉大学电气工程学院,湖北武汉430072;哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080
- 4. 国网青海省电力公司电力科学研究院,青海西宁810008
- 折叠
摘要
针对基于时间差的特高频局部放电定位中时间差求解困难的问题,引入了一种新的不基于时间差的特高频局部放电定位方法.通过建立变压器局部放电模型和实验系统,在获得了不同检测距离下两种典型局部放电特高频谱图数据的基础上,根据特高频谱图统计参量与传播距离间的关系,采用多元非线性回归的方法,建立了检测距离与统计参量间的函数关系,从而可以将在未知距离测量得到统计参量代入函数计算得到检测距离.通过实验数据检验,该方法计算得到的检测距离精度小于40 cm.
Abstract
According to the problem of calculating the time difference of arrival (TDOA) based on ultrahigh frequency (UHF) partial discharge (PD) location,a new method for UHF partial discharge localization was introduced which is not based on the TDOA.Tow typical PD model in power transformer and experimental system were established,and these phase resolved partial discharge pattern (PRPD) data from typical UHF partial discharge at different detection distances were obtained.Based on the relationship between the statistical parameters of PRPD and detection distance,multivariate nonlinear regression was adopted to build a function to detect the distance using the statistical parameters,which was used to calculate unknown detection distance using statistical parameters.Experimental data was processed to verify the validity of the method and the result shows that the accuracy of the detection distance calculated is less than 40cm.
关键词
局部放电/特高频/定位/检测距离/定位精度Key words
partial discharge/ultra-high frequency/location/detection distance/location accuracy引用本文复制引用
出版年
2014
NETL
NSTL
维普
万方数据