采用改进型圆形超声阵列传感器的油中局放定位  

Locating Partial Discharge in Oil Using the Improved Circular Ultrasonic Array Sensor

作　　者：谢庆[1] 程述一[2] 律方成[2] 侯姗姗[2] 王成强[2] 

机构地区：[1]保定天威集团有限公司博士后科研工作站,保定071000 [2]华北电力大学河北省输变电设备安全防御重点实验室,保定071003

出　　处：《高电压技术》2013年第5期1054-1060,共7页High Voltage Engineering

基　　金：国家高技术研究发展计划(863计划)(2011AA05A121);河北省自然科学基金(E2010001703)~~

摘　　要：局放超声阵列定位方法是阵列传感器技术与阵列信号处理技术发展的最新成果之一。为此,采用改进型圆形超声阵列传感器对局放源进行测向定位。首先研制了改进型圆形超声阵列传感器,并搭建了油中局放定位实验平台;接着采用相位模式激励算法、MUSIC算法以及多平台交叉定位相结合的方法对圆形阵列信号进行测向定位,最后运用快速独立分量分析(fast independent component analysis,FastICA)算法对超声阵列信号进行去噪后再进行测向定位。结果表明:采用改进型圆形阵列传感器的定位准确度优于传统圆形阵列和方阵;比较去噪前后的定位效果发现去噪后的定位误差为3.8cm,优于去噪前的11.3cm。多次实验验证了该方法的有效性。The method of using ultrasonic array to locate partial discharge（PD） is one of the latest achievements in the modern array sensor technology and array signal processing technology.Thus,we practically adopted an improved circular ultrasonic array sensor to locate PD sources.Firstly,we developed an improved circular ultrasonic array sensor,thereby,we built a PD locating experimental platform in oil.Secondly,the phase mode excitation and the multiple signal classification（MUSIC） algorithms,combining with the multi-platform locating principle,were used to find direction of PD array signals and to locate the PD sources.Finally,the fast independent component analysis（FastICA） algorithm was used to de-noise the measured signals and to confirm their direction and locations.Results show that the locating accuracy of the improved circular array is better than that of traditional circular and the square array;by de-noising the array signals,the locating error is reduced to 4.9 cm which is less than 11.3 cm,the error in the case of no de-noising.Moreover,the validation of presented method is proved by a few experiments.

关 键 词：局部放电 圆形阵列 相位模式激励 快速独立分量分析 定位 去噪 

分 类 号：TM855[电气工程—高电压与绝缘技术] TP212.9[自动化与计算机技术—检测技术与自动化装置]