New aspects of reliability in gas insulated substations

Pohlink, Karsten; Mikes, E.; Ponchon, Philippe; Montillet, G.F.

doi:10.1109/pes.2006.1709523

Cited by 6 publications

(2 citation statements)

References 1 publication

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“…The contamination of GIB with metallic particles can therefore prove to be a great snare in GIS working at high fields [2][3]. Elimination or minimization of the effects of particle contamination will enhance the reliability and also aids in higher operating voltages at a reduced size which leads to a potential saving of money.…”

Section: Introductionmentioning

confidence: 99%

Minimization of Movement of Free Particles in Gas Insulated Busduct using Coated Electrodes under Impulse Voltage

Anoop¹,

Kumar²,

Naidu³

et al. 2017

Advanced Science and Technology Letters

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Abstract. Presence of metal particles which can conduct can weaken the dielectric strength of sulphur hexafluoride as much as 90% in transmission and switching equipment. These particles can move in the electric field or can settle on the surface of the conductors, thereby increasing the local surface fields. The movement of such particles, lying within the surface of the enclosure is arbitrary in a horizontal coaxial system. Several methods were used for controlling and limiting the impact of these particles, one of them being coating the inner surface of the outer enclosure with a thin layer of dielectric. This increases the electric field required to rise a particle lying within surface of enclosure. GIS should be able to withstand any transient over voltages caused due to switching surges or lightning and protect the transmission lines and other electrical apparatus without breakdown. Lightning Impulse Voltage of 1050 kV superimposed on Power frequency voltages of 75 kV. 100 kV, 132 kV, 145 kV, and 200 kV are applied to a single Phase GIB and the dynamics of the Aluminum, Copper and Silver particles is studied. The pattern of the particle movement in radial and axial directions is observed with Monte Carlo Simulation and also without using Monte Carlo Simulation.

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Section: Introductionmentioning

confidence: 99%

Minimization of Movement of Free Particles in Gas Insulated Busduct using Coated Electrodes under Impulse Voltage

Anoop¹,

Kumar²,

Naidu³

et al. 2017

Advanced Science and Technology Letters

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“…If the effects of these particles could be eliminated, then this would improve the reliability of compressed gas insulated substation [3]. It would also offer the possibility of operating at higher fields to affect a potential reduction in the GIS size with subsequent savings in the cost of manufacture and installation.…”

Section: Introductionmentioning

confidence: 99%

Metallic particle dynamics in a single phase gas insulated busduct with coated electrodes under lightning impulse superimposed on power frequency voltage

Kumar¹,

Amarnath²

2009

Int Trans Elec Energy Syst

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Conducting particles in transmission and switching equipment insulated by compressed sulphur hexafluoride (SF 6 ) can result in loss of as much as 90% of the gas dielectric strength. These particles may be free to move in the electric field or may be fixed on the conductors, thus enhancing local surface fields. In a horizontal coaxial system with particles resting on the inside surface of the enclosure, the motion of such particles is random. The power industry has utilized several methods to control and minimize the effect of particle contamination in GIS. One such technique is to apply a dielectric coating to the inside surface of the outer GIS enclosure. The electric field necessary to lift a particle resting on the inside surface of a GIS enclosure is much increased due to the coating. Transient over voltages due to lightning and switching surges cause steep build-up of voltage on transmission lines and other electrical apparatus, therefore it is necessary for the GIS also to withstand such voltages without breakdown of insulation. Lightning impulse voltage of 1050 kV is superimposed on power frequency voltages of 75 kV, 100 kV, 132 kV and 145 kV are applied to 1-Phase Gas Insulated Bus (1-Phase GIB) and the maximum movement of aluminum, copper, and silver particles is determined. The movement patterns are also determined with and without Monte-Carlo simulation for movement of particle in axial and radial directions. The results are presented and analyzed.

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Partial discharge in Gas Insulated substations (GIS): A development and engineering perspective

Aaradhi

Gaidhani

2013

2013 12th International Conference on Environment and Electrical Engineering

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New aspects of reliability in gas insulated substations

Cited by 6 publications

References 1 publication

Minimization of Movement of Free Particles in Gas Insulated Busduct using Coated Electrodes under Impulse Voltage

Minimization of Movement of Free Particles in Gas Insulated Busduct using Coated Electrodes under Impulse Voltage

Metallic particle dynamics in a single phase gas insulated busduct with coated electrodes under lightning impulse superimposed on power frequency voltage

Partial discharge in Gas Insulated substations (GIS): A development and engineering perspective

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