Summary of GIL technology
Continuous welded; lifetime sealed
High power AC transmission capacity
Low losses & high availability
No reactive power compensation
No ageing of insulating gas mixture
Immediate automatic reclosure
Low external electromagnetic fields
High safety; no fire hazard
Deployment to date up to 1km circuits
Calculated deployable up to 70+km
Ideal for undergrounding OHL sections
Undergrounding Electricity
Transmission:
Introduction to Gas Insulated Line (GIL) technology
National Symposium on
Future Electricity Networks
19 January 2011 @ the ICE, 1 Great George Street, London
Colin Johnston: Siemens Energy
© Siemens
Copyright © Siemens AG 2011.
National Future Energy Networks Symposium, London, 19 Jan 2011
GIL is environmentally friendly:
Safe for personnel and for the public
Colin Johnston
AG 2011
Energy Sector
Lifecycle considerations
Engineering and installation
Silent operation
Operation
Safe to touch
End-of-life disposal
No health impact
No risk of fire
No burn through of enclosure
Low electromagnetic radiation
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
Engineering and installation:
Inside an installation tent
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Engineering and installation:
Automated orbital welding
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
© Siemens
AG 2011
Energy Sector
Colin Johnston
© Siemens
AG 2011
Energy Sector
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Engineering and installation:
Low-cost tunnel for dig-and-cover GIL installation
Engineering and installation:
Buried GIL – use of special backfill material
Requirements
Requirements
Good heat dissipation
Perfectly flowing
• Particularly fast installation
process,
Ecologically immaculate
• Economic building cost,
Re-use of excavated soil
• Maximum automation,
Short construction period
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
© Siemens
AG 2011
Energy Sector
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Operation:
Comparative AC transmission losses
Lifecycle considerations
Engineering and installation
Engineering and installation
Operation
Operation
End-of-life disposal
End-of-life disposal
with GIL
app. 30% less losses
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
© Siemens
AG 2011
Energy Sector
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Operation:
Repair approach for buried GIL
Operation:
Maintenance
Engineering and installation
1
Operation
4
End=of-life disposal
5
2
6
3
7
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
© Siemens
AG 2011
Energy Sector
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Operation:
Auto-reclosure
Lifecycle considerations
Scenario:
Scenario:- -Fault
Faultdetection
detectionby
byprotection
protectionsystem
system
- -Line
Linedrop-off
drop-offand
andarc
arcextinguishing
extinguishing
Auto-reclosure:
Auto-reclosure:
- -Gas
Gasinsulation
insulationisisself-recovering
self-recovering
- -Successful
Successfulauto
autore-closure:
re-closure:
by-products
by-productsare
arecollected
collectedin
inthe
the
particle
particletrap
trap
- -Unsuccessful
auto
re-closure:
Unsuccessful auto re-closure:
no
noimpact
impactor
orfire
fireoutside
outsidethe
theGIL
GIL
Engineering and installation
Operation
End-of-life disposal
View
Viewinside
insidethe
theGIL:
GIL:
Test
Testconditions:
conditions: 63
63kA,
kA,500ms
500ms
No
Noexternal
externalimpact.
impact.
Due
Dueto
touse
useof
ofnon-inflammable
non-inflammablematerials
materialsthere
thereis
isno
nofire
firerisk.
risk.
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
© Siemens
AG 2011
Energy Sector
End-of-life disposal:
Materials almost totally recyclable & reusable
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Electricity transmission:
Technology selection criteria
Engineering and installation
- Basic technical requirements
- Residential impact
Operation
- Visual impact
End-of-life disposal
- Environmental impact
- Special technical & safety constraints
- COST
Material value underground
•Aluminium > 40 kg/m completely reusable
•Insulation gas completely reusable
•Cast-resin components a very small proportion
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
Guidelines that we observe:
Technological choices; Environmental considerations
Equipment
OHL
Standard lines in rural area
X
Lines with special constraints,
requiring underground solutions (e.g. close to
airports, through cities or villages, in space-restricted
areas etc.)
© Siemens
AG 2011
Energy Sector
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Approximate cost comparisons:
400kV transmission systems
GIL
Cable
X
X
Table is for 2,000MVA
Equipment
OHL
GIL
Number of necessary
1
1
Cable
x2
systems
Lines with transmission power < ~ 1,500MVA
X
(X)
X
Lines with transmission power > ~ 1,500MVA
X
X
May need
double cable
system
(if double
system needed)
Installation cost
1
Circa x10+
Circa x10+
(see next slide)
(double system)
lower
Special requirements concerning EMF
X
Operation losses
1
lower
Special requirements concerning fire protection
and/or explosion protection
X
Maintenance costs
1
lower
lower
Replacement needed
Up to 100yrs?
Expect 50+yrs
Circa 30+yrs
Details are extremely dependent upon project conditions!
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector
Details are extremely dependent upon project conditions!
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
© Siemens
AG 2011
Energy Sector
Land usage:
Comparisons for cable & GIL
Electromagnetic radiation:
Comparisons for OHL, cable & GIL
Cable
GIL
OHL
Cable
GIL
15m
9m
Potential savings on land acquisition or lifetime right-of-way costs
© Siemens
National Future Energy Networks Symposium, London, 19 Jan 2011
References:
Gas-Insulated Transmission Lines (Oct 2010*)
Statkraft (NVE)
RoD, Norway
110 m / 1981
Rheinisch Westfälische
Elektrizitätswerke
Kelsterbach, Germany
5400 m / 2009
Badenwerk
Rheinhafen, Germany
Steampower station unit 7
800 m / 1982
Schluchseewerk AG
Wehr, Germany
4000 m / 1975
Stadtwerke München
HKW-Nord, Germany
800 m / 1990
AG 2011
Energy Sector
Colin Johnston
ERTAN Hydro Power
Jinping I, China
3300 m / 2011
China Three Gorges
Project Corporation,
Xiluodu, China
12750 m / 2012
Thank you !
Tehri Hydro Development Corp., Tehri
Hydro Project, India
4550 m / 2006
Austria Hydro Power
Limberg II, Austria
480 m / 2010
Ontario Hydro
Bowmanville, Canada
1257 m / 1987
Electricity Generating
Authority of Thailand
Sai Noi, Thailand
3510 m / 2002
NEEWS Northeast Utilities
Service Co., USA
1275 m / 2011
Energie Ouest Suisse
PALEXPO, Switzerland
2560 m / 2001
Public Utilities Board
Senoko, Singapore
401 m / 1993
*) Overall tube length >86 km
Deutsche Babcock AG for
Ministery of Electricity
Homs P.S., Libya
800 m / 1980
Swawek, Windhoek
Ruacana, Namibia
800 m /1976
*) Overall tube length 86,704 m
Perusahaan Umum
Listrik Negara PLN
Gresik Power Plant,
Indonesia
2300 m / 1992
Atomic Energy Org.
Nuclear power
station Iran 1, Iran
3700 m
Egyptian Electricity Authority
Itay el Baroud, Egypt
670 m / 1993
Cairo Electricity
Power Corp.
Cairo, Egypt
1850 m / 2004
National Future Energy Networks Symposium, London, 19 Jan 2011
The End
Neckarwerke
Altbach, Germany
800 m / 1985
National Grid
Elstree, Great Britain
750 m / 2004
© Siemens
AG 2011
Energy Sector
Colin Johnston
SNEC Jeddah,
Saudi Arabia
300 m / 1981
Saudi Consolidated
Electricity Company
Rabigh/Yanbu,
Saudi Arabia
1340 m / 1988
Saudi Consolidated
Electricity Company
9023, Saudi Arabia
21,000 m / 2010
National Future Energy Networks Symposium, London, 19 Jan 2011
Dubai Electricity and Dubai Electricity and
Water Authority
Water Authority
Warsan, Dubai
Series Reactors, Dubai
4050 m / 2007
1100 m / 2011
Colin Johnston
above ground installation
tunnel installation
directly buried installation
© Siemens
© Siemens
AG 2011
Energy Sector
National Future Energy Networks Symposium, London, 19 Jan 2011
Colin Johnston
AG 2011
Energy Sector