Nonintrusive Partial Discharge Measurements on High Voltage Switchgear

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Nonintrusive partial discharge measurements on high voltage switchgear Conference Paper · January 1997 with 8 Reads DOI: 10.1049/ic:19961073 · Source: IEEE Xplore Conference: Monitors and Condition Assessment Equipment (Digest No. 1996/186), IEE Colloquium on

1st P. Brown

Abstract Partial discharges in high voltage metal-clad switchgear can result in catastrophic failure of the individual plant and in some cases of the substation. There has been a need for detection and location of the damaging discharges without the plant or substation being taken out of service. The conventional partial discharge detection technique requires direct connection to the high voltage busbars and therefore is limited in application. The EA Technology Partial Discharge Locator and Partial Discharge Monitor are designed to ful㈘l this important requirement. These instruments are complemented by ultrasonic detection to provide a comprehensive service to both Regional Electricity Companies and industry. The Partial Discharge Locator and Partial Discharge Monitor both use the Transient Earth Voltage (TEV) measurement technique. The Partial Discharge Locator is a portable instrument used to survey switchrooms taking approximately an hour to survey a ten panel switchboard. The Partial Discharge Monitor is installed for a week monitoring a switchboard and provides a means of detecting intermittent partial discharge activity which may be missed by a survey with the Partial Discharge Locator

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"In TEV measurement, the non-intrusive sensor is mounted at the outside surface of grounded metallic enclosure of HV apparatus. The sensor detects TEV signal which is produced by radiating electromagnetic waves of PDs inside metal enclosure [5, 8]. To illustrate this idea, a laboratory test was set up as shown inFig.I, where a PD generator was placed inside a

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Nonintrusive partial discharge measurements on high voltage switchgear metallic enclosure. "

Recognition of partial discharge using wavelet entropy and neural network for TEV measurement [Show abstract]

Full-text · Conference Paper · Oct 2012 Guomin Luo

DaMing Zhang

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"As mentioned in many papers [2], [17], PDs inside the metal enclosure generate radiating electromagnetic waves which duce TEV on the outside surface of the grounded metal cabinet . To illustrate this idea, a laboratory test was set up as shown inFig. "

Time–Frequency Entropy-Based Partial-Discharge Extraction for Nonintrusive Measurement [Show abstract]

Full-text · Article · Oct 2012 · IEEE Transactions on Power Delivery Guomin Luo

Daming Zhang

YongKwee Koh

+1 more author...

KimTeck Ng

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Partial discharge and electrical equipment insulation condition assessment [Show abstract]

No preview · Article · Nov 2005 · IEEE Transactions on Dielectrics and Electrical Insulation G.C. Stone Read Show more

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