substations committee gis subcommittee k2 module...
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![Page 1: Substations Committee GIS Subcommittee K2 Module …ewh.ieee.org/conf/tdc/C_08TD0765-GIS-Basics-2008-04-15-Phil.pdf · 1-1-IEEE/PES Substation Committee - GIS Subcommittee T&D Chicago](https://reader034.vdocuments.mx/reader034/viewer/2022042517/5a79d2127f8b9ae67b8c3be5/html5/thumbnails/1.jpg)
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IEEE/PES Substation Committee - GIS Subcommittee
T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
Substations CommitteeGIS Subcommittee K2
ModuleGas Insulated Substation (GIS)
Basics
IEEE
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IEEE/PES Substation Committee - GIS Subcommittee
T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
ContentsGIS Basics
A Introduction to GISC Design Features of GIS
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T&D Chicago GIS
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ContentsGIS Basics
A Introduction to GIS
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T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
Introduction to GISTypical Air Insulated Substation 345/230/115kV
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T&D Chicago GIS
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Introduction to GISTypical Gas Insulated Substation 345/115kV
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T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
Introduction to GISCable Feeder Unit
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Introduction to GISDimension ComparisonGIS Technology
SF6 used as the insulating media
Reduced clearances- 345 kV AIS 4.6 m (15 feet)- 345 kV GIS 380 mm (15 inches)
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T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
Introduction to GISView into Bus Bar: Conductor/Enclosure Dimension
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Busbar DisconnectorCurrent TransformerCircuit Breaker
CableConnection
DisconnectorCurrent TransformerCircuit Breaker
Introduction to GISClassic Single Phase Enclosure of GIS
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IEEE/PES Substation Committee - GIS Subcommittee
Introduction to GISMidway Sunset Sunoco Cogen 242 kV GIS
4
242 kV
2000 A
40 kA
No. of breakers
Rated voltage
Rated current
Rated short-circuit current
1988Supply year
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T&D Chicago GIS
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Introduction to GISClassic Three Phase Enclosure of 72.5 to 170 kV GIS
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T&D Chicago GIS
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Introduction to GISAdvanced Three Phase GIS 72.5 to 145 kV
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T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
Introduction to GISAdvanced Three Phase GIS 72.5 to 145 kV
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T&D Chicago GIS
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ContentsGIS Basics
B Design Features of GIS
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Design Features
GIS technology: compact, low-life cycle cost andmodular for indoor and outdoor applications
Modular design, factory pre-assembled and tested units
Space requirement less than 20 % of comparable AIS
Safety (enclosed energized components)
Continous monitoring of SF6 densitity
Sealed for operating life > 50 years
Major inspection: not before 25 years 1)
1) Is influenced by the operation duties
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T&D Chicago GIS
IEEE/PES Substation Committee - GIS Subcommittee
Design Features
GIS technology: compact, low-life cycle cost andmodular for indoor and outdoor applications
Corrosion-resistant
Low fault-probability/high availability
Protected against aggressive environmental conditions
Seismic resistant
Low EMF and susceptibility to EMC
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Design FeaturesSpace Savings
Space Reductionappr. 70 %
Previous
Afterwards
Retrofit of an existing AIS Substation byCompact Substation
145 kV/31,5 kA 4000 A
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Design FeaturesModular Structure (schematic)
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Design FeaturesModular Structure (devices)
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Design FeaturesGIS Pressure Systems
Closed pressure systems:
The closed pressure system uses isolated apparatus compartments with o-ring sealed bolted flanges.
The tightness characteristic of a closed pressure system stated by the manufacturer shall be consistent with a minimum maintenance and inspection philosophy.
The leakage rate from any single compartment of GIS to atmosphere and between compartments shall not exceed 0.5 % per year for the service life of the equipment.*
Practical experiences to the today’s design of GIS show as low as 0.2 % per year.
* IEC 62271-203 Gas Insulated Switchgear for voltages above 52 kV
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Sealant
O-Ring
Insulating Spacer
Air Side
SF6 Gas Side
Flange
■ O-RING
■ LIQUID SILICONE SEALANT
GAS SEALING
PROTECTION AGAINSTGISEnclosure
� WATER INGRESS FROM AIR SIDE
� RUST OF FLANGE
Design FeaturesExample for Static Double Sealing System
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Design FeaturesExample for Corrosion Protection
– – – Tectyl 506 coating for external area A- - - - Trost Multifunction Oil coating for inner area B
Grease bolts with “Molykote Longterm 2”before inserting
gap protection by seal coating
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Design FeaturesExample for Dynamic Sealing System
Coupling of operating rodSF6 gas compartmentSF6 gas compartment
Coupling of operating rod
Shaft SF6 seal Operating lever
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Design FeaturesTypical Grounding / Earthing Arrangement of GIS
Earthing of the buildingConnection to GIS bayOutside the buildingEarthing in the floor/ceilingConnection earthing of floor/ceiling to building
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Thank you for your attention.
Any Questions?