Directly buried gas-insulated transmission lines (GIL)

Poehler, S.; Rudenko, P.M.

doi:10.1109/tdc.2012.6281707

Cited by 13 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To meet the large-scale power transmission need and reduce transmission loss, gas-insulated transmission line (GIL) has been widely utilized worldwide since the 1970s [1][2][3]. During the operation of the GIL, the defects and deterioration of the insulation pose a significant threat to its safety [4], while partial discharge (PD) serves as a harbinger and manifestation of insulation degradation [5,6].…”

Section: Introductionmentioning

confidence: 99%

Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology

et al. 2021

View full text Add to dashboard Cite

Partial discharge (PD) is one of the main causes rendering the deterioration of the insulation state in gas-insulated transmission line (GIL). Accurate and timely localization of the PD source is essential to ensure the safe and stable operation of the GIL. At present, optical PD detection technology shows advantages in terms of high sensitivity and strong anti-interference performance. Therefore, an optical PD localization method based on optical simulation fingerprint database is proposed. The introduction of simulation conquers the difficulty of obtaining a PD fingerprint database in field experiments. This method constructs a simulation fingerprint database by performing PD simulation in a GIL simulation model of the same size as the actual GIL. The natural neighbour interpolation algorithm is applied to expand the simulation fingerprint database to cover all locations in the GIL. The two-level localization method proposed is to match the PD fingerprint to be tested with the expanded fingerprint database, which can reduce the amount of calculation while maintaining the localization accuracy. The experimental results show that the average localization error of this method is only 9.7 mm, and the localization time is reduced by about 11 times compared with the normal one-level localization method. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

show abstract

Section: Introductionmentioning

confidence: 99%

Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology

et al. 2021

View full text Add to dashboard Cite

show abstract

“…advantages including high reliability in long-distance power transmission, long service life, high transmission capability and low energy loss. More importantly, GIL has lower requirements for transmission corridors in comparison with traditional overhead lines, which can be used for long-distance power transmission in complex terrains [1,2].…”

Section: Gas Insulated Transmission Line (Gil) Exhibits Numerousmentioning

confidence: 99%

Experimental and numerical study on formation of interface separation and interfacial dielectric strength of GIL insulator

Guo

Wang

et al. 2019

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

As the transmission capacity of gas insulated transmission line (GIL) increases, the synergistic improvement in dielectric and mechanical strengths of GIL insulators is urgently needed for the development of advanced power systems. Mechanical defects in power equipment are prone to induce discharges during high voltage operations, which need to be mitigated. In this paper, the strains on the GIL insulator surface are measured by fiber Bragg grating (FBG) strain sensors during hydrostatic tests. An abnormal change of strain is detected near the interface between center conductor and the spacer. The numerical results of stress distributions of GIL insulator during manufacturing and high-voltage operation are calculated by the finite element method. The results indicate that the mechanical stresses are concentrated at the interface, which lead to the development of conductor-spacer interface separation. In addition, based on the hydrostatic test and the FEM calculations, the dielectric interfacial strength, including the electric field distribution, and flashover are investigated by a combination of numerical and experimental studies. The results indicate that the air gaps generated by the separated interface distort the electric field at the tip of the gap, which is likely to cause discharges and reduce the gas-solid interfacial flashover strength of the insulator, placing concerns of insulation failure and even operating failures of GIL. This work sheds light on the importance of interfacial structure of power equipment and will guide the design and the manufacture of GIL insulator.

show abstract

“…Gas insulated transmission line (GIL) is a kind of high voltage and large current power transmission equipment which adopts SF 6 or SF 6 /N 2 mixed gas insulation, and its metal enclosure is coaxial with the busbar [1, 2]. It has the advantages of large transport capacity, flexible layout, without pollution, and no influence from external environmental factors such as dust, humidity and ice cover [3].…”

Section: Introductionmentioning

confidence: 99%

Study on the scheme design of integrated grounding system for a 550 kV gas insulated transmission line

Zhao

Tang

Huang

et al. 2019

J. eng.

View full text Add to dashboard Cite

Directly buried gas-insulated transmission lines (GIL)

Cited by 13 publications

References 2 publications

Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology

Method of GIL partial discharge localization based on natural neighbour interpolation and ECOC‐MLP‐SVM using optical simulation technology

Experimental and numerical study on formation of interface separation and interfacial dielectric strength of GIL insulator

Study on the scheme design of integrated grounding system for a 550 kV gas insulated transmission line

Contact Info

Product

Resources

About