Ultra-high Frequency Multi-source Partial Discharge Direction of Arrival Estimation Method Based on Virtual Array Extension

被引：0
作者：
Zhou N. [1 ]
Luo L. [1 ]
Huang H. [2 ]
Huang F. [2 ]
Sheng G. [1 ]
Jiang X. [1 ]
机构：
[1] Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai
[2] Global Energy Interconnection Research Institute, Nanjing
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 05期
关键词：
Compressive sensing; Multiple sources PD; Partial discharge; Spatial spectrum estimation; Ultra-high frequency; Virtual array extension;
D O I：
10.13336/j.1003-6520.hve.20190430027
中图分类号：
学科分类号：
摘要：
The direction of arrival (DOA) estimation of multiple ultra-high frequency (UHF) partial discharge (PD) sources are difficult to implement. Based on the compressive sensing (CS) theory, with the steering vector matrix as the transformation matrix, with the random Gaussian matrix as the measurement matrix, the traditional 2×2 UHF array was virtually extended to a N×N (N>2) array using the regularization-focal underdetermined system solver to multiple measurement vectors (RM-FOCUSS) signal reconstruction algorithm. On the basis of wide-band signal focusing and environment noise suppression, the spatial spectrum of the PD signal sources was constructed using the multi-signal classification (MUSIC) algorithm, and the accurate orientation of the multi-local discharge source was realized according to the spatial spectral feature distribution. The simulation results show that the orientation accuracy of the extended 4×4 array is greatly improved and the directional angel error is reduced from about 10 degrees to 4 degrees. With the extended 4×4 array in field tests as an example, the directional angle error is about 8 degrees and the pitch angle error is about 4 degrees. The number of partial discharge estimation has expanded from 1 to 3 compared to the traditional array, which further verifies the effectiveness of the proposed method. The research can provide a reference for the partial discharge detection of electrical equipment. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：1551 / 1558
页数：7
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