局部放电超声阵列信号的提取策略研究

项目名称： 局部放电超声阵列信号的提取策略研究

项目编号： No.51307060

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 电工技术

项目作者： 谢庆

作者单位： 华北电力大学（保定）

项目金额： 24万元

中文摘要： 获得品质优良、维数合理的阵列信号是确保电气设备局部放电超声检测的先决条件，也是阵列信号处理理论中的重要课题。 本项目主要研究局部放电超声阵列信号的提取策略。 首先，建立局放超声阵列传感器的声学性能与其结构、形式、参数之间的映射关系，获得阵列传感器稀疏分布的规律，并结合局放超声阵列定位算法，研究不同稀疏结构下，阵列传感器的定位精度，为提取相同阵元数下，品质最优的局放超声阵列信号提供理论依据和技术方案。 然后，将采集到的局放超声阵列信号在过完备原子库上进行分解，建立阵列信号的理论模型，获得不同阵列信号情况下的基函数变化规律，并基于"基追踪"原理，摒弃冗余原子，有效实现局放超声阵列信号的降维处理。 该项目融合电学、声学、阵列信号理论等多学科的最新研究成果，是提取品质优良、维数合理的局放超声阵列信号的基础问题，具有重大理论意义和工程价值。

中文关键词： 局部放电；阵列传感器声学性能；稀疏设计；降维；提取策略

英文摘要： The high quality and reasonable dimension array signals are the key of the detection of partial discharge (PD) in electrical equipment, which is also an important issue in array signal processing theory. The extraction strategy of ultrasonic array signals of partial discharge is studied in this project. First, the mapping relationship between the acoustic performance of the PD ultrasonic array sensors and its structure, form and parameters are established to get the regularity of the sparse distribution of array sensors. Then, the positioning accuracy of different sparse structure is studied using the positioning algorithm of PD ultrasonic array signals, which could provide the theoretical basis and technical solution to extract the best signal of partial discharge with the same number of the array elements. Then, the ultrasonic array signals are decomposed on over-complete data base of atoms, and the change law of the primary function with different signals is studied, dimension of the PD ultrasonic array signals is reduced through abandoning the redundant atoms by the principle of " base track ". This project combines the latest developments of multiple disciplines (includes electricity, acoustic, array signal processing and optimal mathematical), and is the basic issue of extracting the high quality and reaso

英文关键词： partial discharge；The acoustic performance of array sensor；sparse design；reduce the dimension；extraction strategy