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基于改进RD-MUSIC算法与稀疏方形阵列的双局放源超声定位方法研究 被引量:4

Research on Ultrasonic Location Method for Double PD Sources Based on Improved RD-MUSIC Algorithm and Sparse Square Array
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摘要 电气设备局部放电超声阵列定位是将超声阵列传感器与阵列信号处理技术应用于局部放电超声定位的一种新方法。研究表明,传统的测向算法对双局放源的定位精度不足,分辨力较低;满阵传感器结构复杂且成本昂贵,不适合工程应用。据此,提出一种基于改进RD-MUSIC(Reduced Dimension-Multiple Signal Classification)的测向算法和稀疏方形阵列传感器的双局放源检测方法。以稀疏度为4阶的4×4方形平面阵列传感器为例,研究了基于改进RD-MUSIC算法的双局放源的波达方向估计算法的有效性。仿真结果显示改进RD-MUSIC算法得到的测向星谱图可直观获得DOA估计量,提高了计算速度和测向精度,实验验证了该方法的有效性。 Ultrasonic array positioning of partial discharge(PD) in electrical equipment is a new method of applying ultrasonic array sensors and array signal processing technology to discharge ultrasonic positioning.Researches show that the traditional direction-finding algorithm has poor positioning accuracy and low resolving power for double PD sources;the full array sensor,with complicated structure and high cost,is not suitable for engineering application.Thus,this paper presents a new direction-finding method for double PD sources based on improved RD-MUSIC(Reduced Dimension-Multiple Signal Classification) and sparse square array sensors.The author,taking the square planar array sensor with a sparse ratio of 4 as an example,studies the validity of DOA estimation of double PD sources based on improved RD-MUSIC algorithm.The simulation results show that the direction of star spectrum produced by improved RD-MUSIC algorithm can generate DOA estimator directly and increase the computation speed and direction-finding accuracy.The experiment verifies the effectiveness of the proposed method.
出处 《华北电力大学学报(自然科学版)》 CAS 北大核心 2018年第1期1-6,共6页 Journal of North China Electric Power University:Natural Science Edition
基金 国家自然科学基金资助项目(51307060) 河北省科技计划项目(Z2013086)
关键词 局部放电 稀疏方形阵列 改进RD-MUSIC算法 双局放源 测向定位 partial discharge (PD) sparse square array improved RD-MUSIC double PD sources direction-find-ing location
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