NDLI: Partial discharge direction-of-arrival estimation in air-insulated substation by UHF wireless array and RSSI maximum likelihood estimator

Content Provider	IET Digital Library
Author	Han, Bei Luo, Lingen Sheng, Gehao Jiang, Xiuchen
Abstract	The quick detection and localisation of partial discharge (PD) in an air-insulated substation (AIS) based on ultrahigh-frequency (UHF) sensor arrays are efficient for power equipment monitoring. The adopted UHF PD time difference-of-arrival (DOA) methods mainly use the time difference of electromagnetic wave signals. Thus, the system requires both a high-sampling rate and time synchronisation accuracy, leading to a high cost and large size. In this study, the feasibility and accuracy of PD DOA in an AIS were investigated using an UHF wireless sensor array and the received signal strength indicator. First, the power pattern of the designed UHF wireless sensor array was obtained via an offline experiment. Then, a statistical approach to the PD DOA method based on the maximum likelihood estimator was employed to obtain the preliminary DOA result. Finally, interpolation and clustering algorithms were used to improve the accuracy of the DOA. A laboratory test was conducted. The average error of the PD DOA was <6°, and the cost-effectiveness and portability were clearly improved.
Starting Page	5491
Ending Page	5497
Page Count	7
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 23, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/23
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0703
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-09-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Air-insulated Substation AIS Charge Measurement Clustering Algorithm Direction of Arrival Estimation Electromagnetic Wave Signal Gas Insulated Substations High-sampling Rate Interpolation Interpolation Algorithm Interpolation And Function Approximation Maximum Likelihood Estimation Numerical Analysis Partial Discharge Detection Partial Discharge Direction-of-arrival Estimation Partial Discharge Localisation Partial Discharge Measurement PD DOA Method PD Time Difference-of-arrival Method Power Equipment Monitoring Power Pattern Preliminary DOA Result Received Signal Strength Indicator RSSI Maximum Likelihood Estimator Sensing Device And Transducers Sensor Array Signal Processing And Detection Statistics Substations Synchronisation Time Synchronisation Accuracy UHF Wireless Array UHF Wireless Sensor Array Ultrahigh-frequency Sensor Array Wireless Sensor Network
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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