电力变压器局部放电方位估计的仿真研究

Simulation of orientation estimation of partial discharge in power transformer

提出了一种基于改进MUSIC算法的变压器局部放电源方位估计的方法,该方法在变压器油箱外壳安装超声相控阵接收传感器,通过传感器阵元接收放电源辐射的超声波信号。应用改进MUSIC算法对接收信号进行空间谱分析,完成变压器内一个甚至多个局部放电源的方位估计。仿真结果表明,改进MUSIC算法具有很高的分辨力和估计精度,尤其对于相近的多个信号源,该算法同样具有很高的分辨力。

A new novel technique to locate the partial discharge in the transformer is presented in this paper, which is based on the modified Multiple Signal Classification Method （MUSIC）, The phased - array antenna is fixed on the shell of the transformer. After received by the array elements of the antenna, the signal from the partial discharge ,source will be analyzed by the modified MUSIC algorithm, Thus, orientation of one or even several partial discharge sources in the transform can be estimated, The result of emulator program shows that this modified algorithm has a very high precision and resolution, especially for the sources that are closely positioned.