NDLI: Reliability and failure analysis of porcelain high-voltage surge arresters

Content Provider	IEEE Xplore Digital Library
Author	Rossman, J.B. Droke, M.A. Nelson, J.H.
Copyright Year	2010
Description	Author affiliation: Power System Operations, Substation Projects, Tennessee Valley Authority, Chattanooga, USA (Nelson, J.H.) \|\| Power System Operations, Substation Services and Support, Tennessee Valley Authority, Chattanooga, USA (Droke, M.A.) \|\| Power System Operations, Transmission Power Quality, Tennessee Valley Authority, Hopkinsville, Kentucky, USA (Rossman, J.B.)
Abstract	TVA identified an increasing failure rate of 132-kV (106-kV Maximum Continuous Operating Voltage) porcelain arresters on the 161-kV system. A cross-organizational team was formed to determine the root cause of the 19 arrester failures and provide solutions. The team researched arrester failure modes and solicited input from arrester experts. A root cause diagram is discussed and multiple failure modes were ruled out. Multiple failed arrester units were dissected indicating moisture ingress as the root cause leading to the recent failures. Computer simulations contrasted faults through the Metal Oxide Varistor (MOV) block stack versus faults flowing through the air cavity surrounding the MOV stack. All 19 failures were recorded by digital fault recorders (DFR). The DFR waveforms were compared to the computer simulations showing that the arresters flashed over the internal air cavity. Based on the available physical evidence, moisture ingress is the likely root cause issue for the failures from 2002 to date.
Starting Page	604
Ending Page	607
File Size	545869
Page Count	4
File Format	PDF
ISBN	9781424482832
e-ISBN	9781424482863
DOI	10.1109/ICHVE.2010.5640776
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arresters Porcelain Atmospheric modeling Moisture Circuit faults Integrated circuit modeling Surges
Content Type	Text
Resource Type	Article

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