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电网技术  2006 

基于阵列信号处理的变压器内局部放电源多目标定位方法

, PP. 65-69

Keywords: 电力变压器,局部放电,阵列信号处理,空间谱估计,多目标定位,高电压绝缘技术,电力系统

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Abstract:

提出了一种运用阵列信号处理技术实现变压器内多个放电源同时定位的新方法,该方法在变压器内壁安装两个超声波传感器阵列,通过传感器阵列接收目标空间辐射的超声波信号,应用阵列信号处理技术中的空间谱估计理论分析阵列传感器所接收信号的特征信息(信号源数、传播方向),并完成放电源数的估计、放电源方向的估计和放电源距离的计算,进而实现局部放电的多目标定位。仿真结果表明,该方法具有良好的分辨力和估计精度,能有效估计出变压器内多个放电点的空间位置。

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