NDLI: Radiometric localisation of partial discharge sources inside Air-insulated electrical substation

Content Provider	IET Digital Library
Author	Mishra, Dipak Kumar Bhukya, Anitha Koley, Chiranjib Roy, Nirmal Kumar
Abstract	Monitoring partial discharge (PD) activities inside electrical substation using few ultra high frequency (UHF) sensors mounted around the periphery of the substation could be a useful and economical tool. In this work, an experimental study has been conducted in the laboratory and in substations to investigate the localisation ability of the UHF PD detection system. For localisation, one needs to calculate time difference of arrivals (TDOAs) between the UHF waveforms obtained from the multiple sensors mounted around the substation. After that these TDOAs are used for localisation of the PD sources. In this paper a novel joint entropy (JE)-based TDOAs calculation method is proposed and also compared with the existing techniques. For localisation of PD sources, a modified direction of arrival (DOA)-based method for the near field is proposed, as found to be suitable when the sensors are mounted around the substation. Obtained results in TDOA estimation using the proposed JE method is in line with other technique; however, it was found to provide consistent results and is useful in an extreme situation. Modified DOA-based localisation algorithm found to provide improved performance due to the elimination of approximation as required in previously reported far-field-based localisation system for the air-insulated substations.
Starting Page	1122
Ending Page	1130
Page Count	9
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 8, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2019.0004
Journal	IET Science, Measurement & Technology
Publisher Date	2019-06-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Air Insulation Air-insulated Electrical Substation Air-insulated Substations Dielectric Breakdown And Discharges Direction of Arrival Estimation Economical Tool Entropy Gaseous Insulation, Breakdown And Discharges JE Method Joint Entropy-based TDOA Calculation Method Localisation Ability Modified Direction-of-arrival-based Method Modified DOA-based Localisation Algorithm Multiple Sonsor Partial Discharge Activities Partial Discharge Source Partial Discharges PD Source Radiometric Localisation Reported Far-field-based Localisation System Substations TDOA Estimation UHF PD Detection System UHF Waveform Ultrahigh Frequency Sonsor
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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