Partial discharge diagnostics for gas insulated substations

Pearson, J.S.; Farish, O.; Hampton, B.F.; Judd, M.D.; Templeton, Duncan; Pryor, B.M.; Welch, I.M.

doi:10.1109/94.469984

Cited by 182 publications

(55 citation statements)

References 19 publications

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“…FAST-ACTING DISCONNECTOR: SETUP In HVac MTS, air insulated buses are linked by gas insulated circuit breakers, disconnectors, and earthing switches, primarily to save space [29]. Disconnectors designed for this application are capable of withstanding up to ten times higher recovery voltages than GIS disconnectors, due to the larger substation dimensions and the increased inductance per unit length.…”

Section: Test Setup and Evaluationmentioning

confidence: 99%

Improving GIS Disconnectors for Future HVDC Applications

Ritter

Straumann

Franck

2019

IEEE Trans. Power Delivery

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Abstract-The use of standard HVac disconnectors for bustransfer switching in future HVdc gas insulated switchgear (GIS) has been demonstrated successfully in past research through simulation and testing. Prolonged arcing times through reignitions caused by high frequency harmonics as well as the proposed extension of GIS disconnector switching cases, however, create an HVdc-specific demand for more advanced disconnector concepts capable of withstanding higher switching stresses and increased recovery voltages. A spring-loaded disconnector designed for use in HVac mixed technology switchgear (MTS) was found to shorten the time to first current zero through an accelerated increase of the arcing voltage compared to standard disconnectors. Despite its increased switching performance, the reignition characteristics of this fast-acting disconnector were found to largely follow the previously established extinction criterion, which enables further simulation of similar technologies for HVdc applications. To additionally combat the issue of contamination of HVdc GIS by electrode erosion products, a prototype disconnector was improved using permanent magnets to evoke arc rotation. Erosion tests in air have shown an effective reduction of electrode erosion for long arcing times at currents typical for disconnector switching while bus-transfer tests revealed promising enhancements of the reignition behavior.

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Section: Test Setup and Evaluationmentioning

confidence: 99%

Improving GIS Disconnectors for Future HVDC Applications

Ritter

Straumann

Franck

2019

IEEE Trans. Power Delivery

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“…Gas insulated switchgear (GIS) having a visual effect is commercially available online, and portable systems using the UHF sensors are installed and operated in power company, railroad and large plants [1,2]. However, the live diagnosis depending on the classic method, such as existing infrared cameras and leakage current measurement method in the case of ultra high voltage switchgear, is not effective for the prevention of power outage accidents, because the switchgear internal structure is complex, and it is difficult to determine the occurrence of partial discharge [3]. As a live-diagnosis technique of GIS, UHF technology was applied to the switchboard, and the possibility of application studied [4,5].…”

Section: Department Of Car Mechatronics Sahmyook University Seoul 1mentioning

confidence: 99%

Partial Discharge Detection of High Voltage Switchgear Using a Ultra High Frequency Sensor

Shin

Lee

Hong³

2013

Transactions on Electrical and Electronic Materials

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Partial discharge diagnosis techniques using ultra high frequencies do not affect load movement, because there is no interruption of power. Consequently, these techniques are popular among the prevention diagnosis methods. For the first time, this measurement technique has been applied to the GIS, and has been tested by applying an extra high voltage switchboard. This particular technique makes it easy to measure in the live state, and is not affected by the noise generated by analyzing the causes of faults ? thereby making risk analysis possible. It is reported that the analysis data and the evaluation of the risk level are improved, especially for poor location, and that the measurement of Ultra high frequency (UHF) partial discharge of the real live wire in industrial switchgear is spectacular. Partial discharge diagnosis techniques by using the Ultra High Frequency sensor have been recently highlighted, and it is verified by applying them to the GIS. This has become one of the new and various power equipment techniques. Diagnosis using a UHF sensor is easy to measure, and waveform analysis is already standardized, due to numerous past case experiments. This technique is currently active in research and development, and commercialization is becoming a reality. Another aspect of this technique is that it can determine the occurrences and types of partial discharge, by the application diagnosis for live wire of ultra high voltage switchgear. Measured data by using the UHF partial discharge techniques for ultra high voltage switchgear was obtained from 200 places in Gumi, Yeosu, Taiwan and China's semiconductor plants, and also the partial discharge signals at 15 other places were found. It was confirmed that the partial discharge signal was destroyed by improving the work of junction bolt tightening check, and the cable head reinforcement insulation at 8 places with a possibility for preventing the interruption of service. Also, it was confirmed that the UHF partial discharge measurement techniques are also a prevention diagnosis method in actual industrial sites. The measured field data and the usage of the research for risk assessment techniques of the live wire status of power equipment make a valuable database for future improvements.

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“…Typically requiring high-speed sampling to capture PD pulses with sufficient resolution, phase-resolved partial discharge (PRPD) plots can reveal defect-specific information that can be used for classification and defect diagnosis. The RF method has been applied to on-line plant items including transformers [18], GIS [19] and cables [20], and automated phase-resolved diagnostic methods have been developed based on techniques including fuzzy classifiers [21], support vector machines [22] and knowledgebased systems [23].…”

Section: B Pd Pulse Diagnosticsmentioning

confidence: 99%

Compositional Modeling of Partial Discharge Pulse Spectral Characteristics

Baker

Stephen

Judd

2013

IEEE Trans. Instrum. Meas.

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This version is available at https://strathprints.strath.ac.uk/41327/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. A number of different approaches to PD defect diagnosis have been developed to extract defect-specific information from PD pulse data in both the time and frequency domains. Frequency based PD pulse analysis has previously been demonstrated to offer a low-power approach to PD defect identification, where a mixture of passive and active analog electronics can be used to generate diagnostic features in a low-power device suited to wireless sensor network operation.This paper examines approaches to implementing diagnostic methods for frequency-based PD pulse diagnosis targeted at compositional frequency spectrum features in a computationally efficient manner. Dirichlet and Gaussian distributions are used to demonstrate the complex probabilistic form of fault class decision surfaces, which motivates the proposed application of the log ratio transform to frequency composition data.The results demonstrate that PD defects can be differentiated using these frequency-based methods and that employing the log ratio transform to the compositional frequency content data yields increases in classification accuracy without necessarily resorting to more complex classifiers.

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Partial discharge diagnostics for gas insulated substations

Cited by 182 publications

References 19 publications

Improving GIS Disconnectors for Future HVDC Applications

Improving GIS Disconnectors for Future HVDC Applications

Partial Discharge Detection of High Voltage Switchgear Using a Ultra High Frequency Sensor

Compositional Modeling of Partial Discharge Pulse Spectral Characteristics

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