Diagnostic measurements at UHF in gas insulated substations

Hampton, B.F.; Meats, R.J.

doi:10.1049/ip-c.1988.0017

Cited by 134 publications

(43 citation statements)

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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].…”

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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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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“…The system is verified for the presence of partial discharge activity while raising the applied high voltage in small steps. If partial discharges seem to The first point is also well-known from measurements taken in the field of GIS and transformers [5]. The first step in making a measurement is capturing the frequency spectrum.…”

Section: Introductionmentioning

confidence: 99%

VHF Partial Discharge Detection during After-Laying testing of Power Cables

Meijer

Jongen

Gulski

et al. 2007

2007 IEEE International Conference on Solid Dielectrics

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In this paper the results of after-laying testing of transmission power cable accessories using a nonconventional technique are being presented. The nonconventional system is based on the detection of high frequency signals being emitted by the partial discharge. Therefore, each power cable accessory is equipped with either an internal or external sensor to decouple the partial discharge signals. The partial discharge detection system uses narrow-band detector, in this case a spectrum analyzer.This technique however is very difficult to calibrate due to different factors affecting the frequency response of the measuring setup. This paper also presents a sensitivity check which can be used to validate the sensitivity of the system for a certain required PD level. Examples of on-site sensitivity verification are presented, before the actual PD measurements take place. An example of this system is shown taken from several measurements performed in the field.

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“…Some method such as high frequency detection and ultrasonic detection based on decomposition gases generated by partial discharge are commonly used. Strathclyde University of UK introduced a linear relationship between the square of the energy of the high frequency signal and the square of the discharge of the high frequency signal in refrence [4][5]. The first special high frequency monitoring device was invented in 1986, and installed in Scotland Torness nuclear power plant [6].…”

Section: Introductionmentioning

confidence: 99%

Using IEC 61850 for Switchgear Online Condition Monitoring

Jiang¹

2015

Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science

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Abstract-The online condition monitoring system diagnoses power equipment health status. And now it is one of the major issues to improve the reliability of the power system by preventing a potential failure in advance. Since there are too many different condition monitoring techniques are used, they need to be standardized in IEC 61850. Take gas insulated switchgear (GIS) as a example, this paper studied the condition monitoring diagnosis informatiom model and system integration. GIS is a compact metal encapsulated switchgear consisting of circuit-breakers and disconnectors. GIS condition monitoring system acquires condition data from sensors that are placed in the components. Based on IEC 61850, the modeling method and the application of logical node are standard. And the format of spectra data also is standard. And the paper also standards configuration of intelligent electronic device (IED), conformance testing of IED. The practical application shows that the standardization for switchgear condition monitoring is beneficial for access to the remote center. And the standard based on IEC 61850 is benefit for condition monitoring system intergration.

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Diagnostic measurements at UHF in gas insulated substations

Cited by 134 publications

References 0 publications

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

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

VHF Partial Discharge Detection during After-Laying testing of Power Cables

Using IEC 61850 for Switchgear Online Condition Monitoring

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