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siemens.com/answersRestricted © Siemens AG 2013 All rights reserved.
Gas insulated lines (GIL)[email protected]
November 2013
Restricted © Siemens AG 2013 All rights reserved.
Content
2013-07 Stephan Poehler / E T TS 2 G&C Page 2
Challenges in Mega Cities
Data, Site Works & Laying Methods of GIL
Technical Advantages of GILEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
References
Summary
Technical Advantages of GILCapacitive LoadEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
Restricted © Siemens AG 2013 All rights reserved.
Challenges: Transmission Grid in Densely Populated Areas …in 1970 with 110kV
2013-07 Stephan Poehler / E T TS 2 G&C Page 3
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…in 2000 with several 110kV lines
2013-07 Stephan Poehler / E T TS 2 G&C Page 4
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…in Future with 400(500)kV
2013-07 Stephan Poehler / E T TS 2 G&C Page 5
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Content
2013-07 Stephan Poehler / E T TS 2 G&C Page 6
Challenges in Mega Cities
Data, Site Works & Laying Methods of GIL
Technical Advantages of GILEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
References
Summary
Technical Advantages of GILCapacitive LoadEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
Restricted © Siemens AG 2013 All rights reserved.7
Construction of a Welded GIL„OHL Underground“
Connection of Al tubes and conductors by welding Supported by cast resin insulators Filled with gas mixtureProtected by particle traps
Connection of Al tubes and conductors by welding Supported by cast resin insulators Filled with gas mixtureProtected by particle traps
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Technical Data
2013-07 Stephan Poehler / E T TS 2 G&C Page 8
Designed and tested according to IEC 61640 „HV gas-insulated transmission lines for rated voltages of 72.5 kV and above”
Rated Voltage 245 kV… 550 kV
Impulse withstand voltage … 1675 kV
Rated current (typical) 2000 … 5000 A
Rated short time current 63 kA / 3s
Rated Transmission Load up to 4700 MVA
Capacitance 55 nF/km
Overload capability (typical) 100 %
Insulation gas mixture e.g. 80 % N2 & 20 % SF6
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Installation Site
2013-07 Stephan Poehler / E T TS 2 G&C Page 9
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Fitting of GIL Conductor on Site
2013-07 Stephan Poehler / E T TS 2 G&C Page 10
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Automated Orbital Welding of GIL
2013-07 Stephan Poehler / E T TS 2 G&C Page 11
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Ultrasonic Testing of Site Welds
2013-07 Stephan Poehler / E T TS 2 G&C Page 12
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GIL above Ground
2013-07 Stephan Poehler / E T TS 2 G&C Page 13
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GIL Laid in Tunnels or Directly Buried
2013-07 Stephan Poehler / E T TS 2 G&C Page 14
Small width of trenchMin. interference with environment during installation
Space saving conceptCost advantage
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Content
2013-07 Stephan Poehler / E T TS 2 G&C Page 15
Challenges in Mega Cities
Data, Site Works & Laying Methods of GIL
Technical Advantages of GILEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
References
Summary
Technical Advantages of GILCapacitive LoadEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
Restricted © Siemens AG 2013 All rights reserved.16
Capacitive Load C‘ of Transmission Systems
55nF/km
OHL GIL
15nF/km
210nF/km
XLPE-Cable 2 XLPE-Cables in parallel
420nF/km
Power Transmission with GIL Dr. Stephan Poehler Copyright © Siemens AG 2013
Energy Sector17(800 MVA, 400 kV)
GIL are installed with enclosures short-circuited and solidly grounded at both ends sothat the return current over the enclosure is almost as high as the current of the conductor and therefore the resulting magnetic field outside of the GIL is very low.
GIL Comprise Low Electromagnetic Field:Calculated Enclosure Currents of GIL
Power Transmission with GIL Dr. Stephan Poehler Copyright © Siemens AG 2013
Energy Sector18
Environment Friendly Low Electromagnetic Fields
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Comparison of Losses: OHL vs. Cables & GIL (1 system)
2013-07 Stephan Poehler / E T TS 2 G&C Page 19
GIL 517/500-180/160
Overhead Line 4x560/50AlSt
XLPE Cable 2XKLDE2Y
1x2500mm²
Overhead Line 4x240/40AlStP [W/m]
0,00
50,00
100,00
150,00
200,00
250,00
350,00
200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 A 3000150 400 700 1000 1200 1500 1800 MVA 2100
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Auto Reclosure on GIL
2013-07 Stephan Poehler / E T TS 2 G&C Page 20
Scenario:fault detection by protection systemline drop-off and arc extinguishing
Auto Reclosure:gas insulation is self-recoveringsuccessful auto re-closure: by-products are collected in the particle trapunsuccessful auto re-closure: no impact or fire outside the GIL
View inside the GIL Test Conditions: 63 kA, 500ms
No external impact, no fire risk due to non inflammable materials
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GIL Secondary EquipmentGPS based Arc Location System
2013-07 Stephan Poehler / E T TS 2 G&C Page 21
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Content
2013-07 Stephan Poehler / E T TS 2 G&C Page 22
Challenges in Mega Cities
Data, Site Works & Laying Methods of GIL
Technical Advantages of GILEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
References
Summary
Technical Advantages of GILCapacitive LoadEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
Restricted © Siemens AG 2013 All rights reserved.
GIL Wehr, Germany(1975) Tube Length 4 kms
2013-07 Stephan Poehler / E T TS 2 G&C Page 23
1 600 MVA Transformer Rated Voltage 420 kV2 Encapsulated Surge Arrestors Rated Impulse3 Transfer Switching units Withstand Voltage 1640 kV4 GIL Connection Rated Current 2000 A5 Open Air Surge Arrestor Rated Short-Time Current 53 kA6 Overheadline
54
3,5 m
2,8 m
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Palexpo Fair Building Airport Geneva, Switzerland (2002)
2013-07 Stephan Poehler / E T TS 2 G&C Page 24
Tower 175
PALEXPOHall 6
Tower 176Rated Voltage: 300 kV Rated Rated Current: 2000 A Short-Time Current: 50 kA, 1sRated Impulse Single Phase Withstand Voltage: 1050 kV Length app.: 2500 m
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Xiluodu GIL, Sichuan, China (I)(2013)
2013-07 Stephan Poehler / E T TS 2 G&C Page 25
Customer: China Three Gorges Corporation
Country: ChinaCommissioning: 2013
Underground power transmission on highest reliability level.
Customer benefit
Gas Insulated Transmission Line (GIL) for 500kV; seven systems with 7 x 4500 A rated current.
Products
Connection of a 500-kV-OHL to an underground GIS with through a 480m deep shaft (~2x240m). Very high safety requirements with regard to fire protection, as the tunnel is used also as ventilation shaft.Maximum reliability needed for the connection.
Requirements
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Xiluodu GIL, Sichuan, China (II)
2013-07 Stephan Poehler / E T TS 2 G&C Page 26
Rated Voltage 550 kV Rated Current 4500 ARated Impulse- Rated Short-Time-withstand Voltage 1675 kV withstand Current 63 kA, 3 s
Single phase length app. 12750 m 480m vertical shaft in each circuit
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Kelsterbach Airport Frankfurt, Germany (I)(2011)
2013-07 Stephan Poehler / E T TS 2 G&C Page 27
OHL gantry
400 kV GIS
Customer: Amprion
Location: Airport Frankfurt
Contract award: July 2008
Operation: April 2011
Insulation Gas: 80%N2, 20%SF6
Transmission Power: 2x1800MVA
Installation: 1st GIL Directly Buried
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Kelsterbach (II)Site View before Refilling of the Trench
2013-07 Stephan Poehler / E T TS 2 G&C Page 28
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Neuwied, Munich, Germany (2014)
Customer: Stadtwerke MunichLocation: NeuwiedContract award: Feb. 2013Commercial Operation: Dec. 2013Insulation Gas: 80%N2, 20%SF6Transmission Power: 2x2000MVAInstallation: Tunnel
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Selected References – Gas Insulated Transmission Lines, Status November 2013*
2013-07 Stephan Poehler / E T TS 2 G&C Page 30
Schluchseewerk AGWehr, Germany4000 m / 1975
ERTAN Hydro PowerJinping I, China3300 m / 2012
Rheinisch WestfälischeElektrizitätswerkeKelsterbach, Germany5400 m / 2011
Badenwerk Rheinhafen, GermanySteampower station unit 7800 m / 1982
NeckarwerkeAltbach, Germany800 m / 1985
Statkraft (NVE)RoD, Norway110 m / 1981
Stadtwerke MünchenLangwied, Germany870 m / 2013
Austria Hydro PowerLimberg II, Austria465 m / 2010
National Grid TranscoElstree, Great Britain750 m / 2004
Energie Ouest SuissePALEXPO, Switzerland2560 m / 2001
China Three GorgesProject Corporation, Xiluodu, China12750 m / 2013
Public Utilities BoardSenoko, Singapore401 m / 1993
Perusahaan UmumListrik Negara PLNGresik Power Plant, Indonesia2300 m / 1992
Electricity GeneratingAuthority of ThailandSai Noi, Thailand3510 m / 2002
Tehri Hydro Develop-ment Corp., Tehri Hydro Project, India4550 m / 2006
Dubai Electricity andWater AuthorityWarsan, Dubai4050 m / 2007
Saudi ConsolidatedElectricity Company9023, Saudi Arabia21,000 m / 2010
Saudi ConsolidatedElectricity CompanyRabigh/Yanbu, Saudi Arabia1340 m / 1988
Swawek, WindhoekRuacana, Namibia800 m /1976
Atomic Energy Org.Nuclear power station Iran 1, Iran3700 m
Deutsche Babcock AG forMinistery of ElectricityHoms P.S., Libya800 m / 1980
SNEC Jeddah, Saudi Arabia300 m / 1981
Ontario HydroBowmanville, Canada1257 m / 1987
Egyptian Electricity AuthorityItay el Baroud, Egypt670 m / 1993
Cairo ElectricityPower Corp.Cairo, Egypt1850 m / 2004
*) overall tube length 92,959 m
National GridStella West, GB 1258 m / 2010
National GridPenwortham, GB770 m / 2011 ff
Dubai Electricity andWater AuthoritySeries Reactors, Dubai1100 m / 2011
NEEWS Northeast Utilities Service Co., USA1275 m / 2011
Dubai Electricity andWater AuthorityLM Station, Dubai1400 m / 2012
Tenaga Nasional Berhad, AIR TAWARMalaysia1560 m / 2013
SEC-COA420kV Shoaibah 3Saudi Arabia750 m / 2012
above ground installationtunnel installationdirectly buried installation
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Content
2013-07 Stephan Poehler / E T TS 2 G&C Page 31
Challenges in Mega Cities
Data, Site Works & Laying Methods of GIL
Technical Advantages of GILEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
References
Summary
Technical Advantages of GILCapacitive LoadEMV RadiationTransmission LossesAuto Reclosure FunctionalityInnovative Arc Location
Restricted © Siemens AG 2013 All rights reserved.2013-07 Stephan Poehler / E T TS 2 G&C Page 32
Sealed for lifetimeContinuously weldedHigh ampacityLow lossesLong lifetime through particle trapNo reactive compensation (<100km)No ageing of insulating gasAutomatic reclosure functionalityLow external electromagnetic fieldsHigh safety (no fire hazard)
Summary
Restricted © Siemens AG 2013 All rights reserved.2013-07 Stephan Poehler / E T TS 2 G&C Page 33
Thank you !