UHF PD signal transmission in GIS: Effects of 90° bends and an L-shaped CIGRE step 1 test section

Behrmann, Glenn; Franz, Stefan; Smajić, Jasmin; Tanasic, Zeljko; Christen, Reto

doi:10.1109/tdei.2019.008005

Cited by 25 publications

(13 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different techniques have been deployed to improve the detection and localization of PD in GIS enclosures. Among these, ultra-high frequency (UHF) techniques have been in use since the 1980s as they showed great suppression to noise and high sensitivity [3]- [5]. UHF detection techniques have been widely used for PD detection, classification, and localization of different PD defects in different high voltage equipment [6], [7].…”

Section: Introductionmentioning

confidence: 99%

“…UHF detection techniques have been widely used for PD detection, classification, and localization of different PD defects in different high voltage equipment [6], [7]. The major drawbacks of such technique are the limited information about the exact magnitude of PD charges since there is no direct correlation between the received RF signal strength and the PD intensity, and the difficulties associated with the installation of UHF sensors in some devices like transformers and built GIS systems [3], [7].…”

Section: Introductionmentioning

confidence: 99%

“…To overcome the issue of limited information about the magnitude of PD charge, CIGRE sensitivity verification procedure was developed and used to optimally allocate UHF sensors in GIS enclosures [3], [8]. The sensitivity verification procedure has two steps namely laboratory test (step 1), and on-site test (step 2).…”

Section: Introductionmentioning

confidence: 99%

“…In fact, a GIS cannot be simply modeled as a coaxial waveguide since it has many different components including many bends, radius changes, etc. [3]. Nonetheless, GIS devices support both low-frequency (transverse-electromagnetic (TEM) mode) as well as high-frequency (transverse-electric (TE) and transverse-magnetic (TM) modes) components.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

PD Signal Propagation in GIS: Ultra-High Frequency Detection-Based Modeling

et al. 2020

View full text Add to dashboard Cite

Gas-insulated switchgears (GIS) have become essential parts of electrical power substations due to the associated merits of these capital assets. Although such resilient devices can rarely suffer from failure, partial discharge (PD) is responsible for around 85% of their recorded collapses. Ultra-high frequency (UHF) techniques have been widely used in the detection and localization of PD for a long time because of their immunity to noise and high sensitivity. Understanding electromagnetic (EM) wave behavior in GIS systems is significant for improving the utilization of UHF sensors in PD detection and for the optimal allocation of UHF antennas inside GIS systems. Thus, this paper is devoted to building a detailed 3D finite element (FE) model based on UHF detection techniques to understand the propagation behavior of EM waves inside GIS. A disk-type UHF sensor is used for acquiring EM waves inside the GIS. The sensitivity of the sensor has been obtained using a gigahertz transverse-electromagnetic (GTEM) test cell. The proposed model investigates the impact of multiple disconnecting parts including L-structure, relative angle between PD source and sensors, and disconnecting switches on the propagation of electromagnetic waves based on step 1 of the CIGRE recommendations. To validate the modeled GIS, a simple L-structured model is initially built, and a comparative analysis has been conducted between the built model and the experimental and analytical results from the literature.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

PD Signal Propagation in GIS: Ultra-High Frequency Detection-Based Modeling

et al. 2020

View full text Add to dashboard Cite

show abstract

“…For practical implementation onto the network PD detection must consider sensor design including size and shape, signal delay through solid barriers or angles and detection of the signal and recognising patterns. In this paper, a straight section of gas insulated line is used to study the PD time-of-flight measurements but it is important to note that previous studies have conducted research regarding the effects of signal delay through solid dielectric barriers [10], effects of 90 • bends and L-shapes in GIS [11] and the specific shape and sizes of sensor design for PD applications [12]. Novel sensor designs for PD currently in development include antennas using magnetic field detection [13] and HFCTs [14], which are not currently used on the network.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment

Widger

Carr

Hills

et al. 2020

Sensors

View full text Add to dashboard Cite

The research in this paper consists of practical experimentation on a gas insulated section of high voltage equipment filled with carbon dioxide and technical air as a direct replacement to sulphur hexafluoride (SF6) and analyses the results of PD measurement by way of internal UHF sensors and external HFCTs. The results contribute to ongoing efforts to replace the global warming gas SF6 with an alternative such as pure carbon dioxide or technical air and are applicable to mixtures of electronegative gases that have a high content of buffer gas including carbon dioxide. The experiments undertaken involved filling a full-scale gas insulated line demonstrator with different pressures of CO2 or technical air and applying voltages up to 242 kV in both clean conditions and particle contaminated conditions. The results show that carbon dioxide and technical air can insulate a gas section normally insulated with SF6 at phase-to-earth voltage of 242 kV and that both HFCT and UHF sensors can be used to detect partial discharge with natural gases. The internal UHF sensors show the most accurate PD location results but external HFCTs offer a good compromise and very similar location accuracy.

show abstract

Gas‐Insulated Switchgear (GIS)

2023

Practical Partial Discharge Measurement on Electrical Equipment

View full text Add to dashboard Cite

UHF PD signal transmission in GIS: Effects of 90° bends and an L-shaped CIGRE step 1 test section

Cited by 25 publications

References 12 publications

PD Signal Propagation in GIS: Ultra-High Frequency Detection-Based Modeling

PD Signal Propagation in GIS: Ultra-High Frequency Detection-Based Modeling

A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment

Gas‐Insulated Switchgear (GIS)

Contact Info

Product

Resources

About