NDLI: Non-intrusive sensing method of the phasor of system voltage for partial discharge diagnostics

Content Provider	IET Digital Library
Author	Li, Fei
Abstract	This study presents a non-intrusive sensing method to obtain the phasor of system voltage of overhead lines for a mobile partial discharge diagnostics platform; with the phasor, partial discharges detected by the mobile platform can be characterised by statistical phase-resolved patterns. Firstly, finite-element analysis simulations were conducted to understand the relations between overhead lines of different configurations and the electric field underneath. With an electric field sensor, the phasor of system voltage can be derived with the aid of a second measurement unit for system frequency. The two measurement units are synchronised by two GPS receivers with 1 pulse per second (PPS) accuracy. The method is based on the wide area measurement principle and was verified by laboratory experiments. Then, the methodology has been deployed in the 132/275/400 kV substation and underneath single-circuit overhead lines in the field. The phasor of system voltage on an overhead transmission line can be successfully derived, and phase-resolved partial discharge information can be calculated. This non-intrusive and mobile methodology is effective and efficient for practical field measurements. The method eliminated the needs of connecting to an on-site system voltage, and this is of great importance for diagnostics research carried out by mobile platforms.
Starting Page	5597
Ending Page	5606
Page Count	10
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.2019.1836
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-10-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Charge Measurement Electric Field Sensor Finite Element Analysis Finite-element Analysis Simulations Frequency Measurement GPS Receiver Measurement Unit Mobile Partial Discharge Diagnostics Platform Nonintrusive Sensing Method On-site System Voltage Overhead Power Line Overhead Transmission Line Partial Discharge Measurement Phase-resolved Partial Discharge Information Phasor Measurement Power Overhead Line Power System Measurement And Metering PPS Accuracy Practical Field Measurement Second Measurement Unit Single-circuit Overhead Line Statistical Phase-resolved Pattern Substation Substations System Frequency System Voltage Phasor Voltage 132.0 KV to 400 KV Wide Area Measurement Principle
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
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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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