NDLI: A contribution in partial discharge detection

Content Provider	IEEE Xplore Digital Library
Author	Carminati, E. Lazzaroni, M.
Copyright Year	1997
Description	Author affiliation: Dipt. di Elettrotecnica, Politecnico di Milano, Italy (Carminati, E.)
Abstract	The proposed system allows the measurement of: 1. Apparent charge by means of direct analog integration of the current induced by the PD event; 2. The corresponding value of the applied voltage "V" 3. The time instant in which the Partial Discharge occurs "t/sub PD/". This particular instrumentation, devoted to the measurement of partial discharges, is able to detect, measure and store in a large size memory the three measured data. It is possible to track the real time evolution of the partial discharges. In order to obtain a good evaluation of the discharge characteristics a high-sensitivity and high accuracy detector has been developed using a mixed analog and digital signal processing technique. The system uses a high Q-notch filter to stop industrial frequency and the first odd order harmonics. Integration of signal is then used to achieve apparent charge with lower spectrum distortion of the pulse than classical techniques. A block performs an analog to digital conversion of signals and stores them in memory for subsequent mathematical treatment. All the steps of measurement are supervised by microprocessor. This work presents an analysis which validates the previous results. In particular the practical difficulties to achieve an integration circuit for very sharp pulses in nanosecond range with very quick restoration for PD detection, minimizing errors and noise, are discussed.
Starting Page	501
Ending Page	506
File Size	481219
Page Count	6
File Format	PDF
ISBN	0780337476
ISSN	10915281
DOI	10.1109/IMTC.1997.604000
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-19
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Partial discharge measurement Particle measurements Size measurement Voltage Instruments Detectors Digital signal processing Filters Frequency
Content Type	Text
Resource Type	Article
Subject	Instrumentation 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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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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