NDLI: Distinguishing polymeric insulators PD sources through RF PD measurement

Content Provider	IET Digital Library
Author	Livari, Ali Abedini Firuzi, Keyvan Vakilian, Mehdi
Abstract	A better performance and consequently the widespread use of polymeric insulators in different parts of the power grid can increase their role in the grid reliability. The accumulation of contamination and housing-erosion are the two most effective factors in undermining the performance of this type of insulators. Therefore, electric utilities need to identify contaminated insulators for washing and cracks in polymeric housing to replace them with healthy specimens. This paper discusses the impact of contamination layer and housing-erosion of polymeric insulators on the partial discharges (PD) at the insulator surface, through RF-PRPD (phase resolved partial discharge) patterns. The existence of different sources of PDs in a real environment (transmission line or station) makes it difficult to use the PRPD patterns to distinguish them from each other. Therefore, using a conical monopole antenna, the simultaneous PD signals and the related RF-PRPD pattern of samples under test are captured. The grayscale image was obtained using the time-frequency matrix of the PD signals transform, by wavelet. Then, features are extracted and selected from grayscale image. By clustering of the PD signals, the resulted RF-PRPD sub-patterns are well separated and provided the necessary means to distinguish among the status of different samples under test.
Starting Page	4859
Ending Page	4865
Page Count	7
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 21, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0099
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-08-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Charge Measurement Conical Antenna Conical Monopole Antenna Connector Contaminated Insulators Contamination Layer Davies-Bouldin Criterion Dielectric Breakdown And Discharges Environmental Factors Feature Extraction Greyscale Image Grid Reliability Histogram of Oriented Gradients Method Housing-erosion Image Colour Analysis Image Recognition Insulator Insulator Contamination Insulator Surface Integral Transforms K-medoids Clustering Method Mathematical Analysis Monopole Antenna Packaging Partial Discharge Activities Partial Discharge Measurement PD Source Polymer Insulator Polymeric Housing Polymeric Insulator Power Grid Power Line Supports Power Network Reliability Principal Component Analysis Product Packaging Radio Link And Equipment Radiofrequency-PRPD Pattern Radiotelemetry RF PD Measurement RF-PRPD SubPattern Simultaneous PD Signal Statistics Telemetering System Telemetry Time-frequency Analysis Time-frequency Matrix Wavelet Transform
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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