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September 10th ,2021
g3: Tomorrow's SF6-Free Standard for HV EquipmentBertrand PORTAL – g3 Product Manager
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ContentsBACKGROUND
PORTFOLIO
GAS MANAGEMENT
ADOPTION
SUMMARY
REFERENCES
WHAT IS g3 ?
Background & Context
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SF6 is a Greenhouse Gas
SF6 contributes 23,500
more times to the
greenhouse effect than CO2
SIGNIFICANT ENVIRONMENTAL IMPACT
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SF6 concentration in the atmosphere goes on increasing
+45% during the last 10 years
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1970’s 1997 1999 2006 2007 2010 2014 2015 2016 2017 2020
EU Target
to cut GHG
Emissions:
20% by 2020
40% by 2030
Carbon
neutral by
2050
COP21 Paris
Agreement
entry into
force
COP21 Paris
Agreement
196 countries
commit to
reduce their
GHG
emissions
New EU
F-gas Regulation
(emissions to be
cut 2/3 by 2030
vs.2014)
2009
COP15 Copenhagen
reduce GHG emissions
by 40 to 70% by 2050
(vs. 2010)
California
Global Warming
Solutions Act
EU F-Gas
Regulation
US EPA
SF₆ Emission
Reduction
Kyoto Protocol
SF6 listed as a
Greenhouse gas
SF6 became the main insulating and switching
medium for High Voltage equipment
US EPA
Mandatory Reporting
of Greenhouse Gases
New gas
launchedGE / 3M
collaboration
First
productsFirst
energizations
SF6 Regulations
Growing number of SF6 regulations in the world
2008
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© 2021 General Electric Company. Proprietary. All Rights Reserved.
THE QUESTION IS NO MORE IF THERE WILL BE A SF6 BAN BUT
WHEN WILL COME THE BAN ?
• SF6 ban is scheduled
• Regulation under revision now
• May21, EU proposed options for the new regulation on SF6
• SF6 ban if alternative are available
• Regulation draft scheduled 12/2021
• Transition times could be agreed and have been proposed by DSO,TSO and manufacturers
SF6 Regulations update
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EU welcomes g3
https://ec.europa.eu/clima/sites/clima/files/news/docs/c_2020_6635_en.pdf
EU Commission report on SF6 alternatives – issued Sept. 30th 2020
The report assess whether cost-effective, technically feasible, energy efficient and
reliable alternatives exist.
The report is confirming the availability of alternatives and therefore opening the door
for a future ban of SF6. It is also providing a very positive feedback on g3 technology and
associated products.
Some quotes:
"Gas blends based on fluoronitriles and SF6-based solutions are equivalent in terms of
dimensions and electrical ratings. On the other hand, models with gas blends based on
fluoroketones and natural gases, require larger physical dimensions compared to SF6
models"
420 kV – 63 kA GIS CB
development partially funded
by EU LIFE program
EU selected this project to showcase
Europe’s industrial and
environmental strategy
245 kV – 50 kA LT CB
development partially funded
by EU LIFE program
2019 2021
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Existing
IEC and IEEE
standards are
not specific to
SF6 but need
adaptations for
alternative gases
SF6 became the main insulating and
switching medium for High Voltage
equipment
New gas
launchedGE / 3M
collaboration
First
productsFirst
energizations
Standardization is moving forward
Kista meeting – creation of Ad-Hoc
group to review IEC standards
Start revision of IEC
62271-4
Technical report on impact of alternative gases on existing standards
(PES-TR64) + creation of 2 new WG
3 Working Groups (A3.41, B3.45, D1.67)
Technical Brochure TB730 & TB802
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1970’s 1997 1999 2006 2007 2010 2014 2015 2016 2017 202020092008
What is g3 ?
-Confidential- . Not to be copied, distributed, or reproduced without prior approval.
225/45R17.
GE Selection Criteria
CR
IT
ER
IA
225/45R17.
SE
LE
CT
IV
E
Many Candidates, Minimal Success
N2
CO2Dry Air
Low dielectricstrength
Fluro-ketones
High boiling point
Vacuum
Voltage limitations
CF3I
Toxicity
Perfluoro-carbons
High global warming potential
High dielectric strength
No voltage limitation
Low liquefaction temperature
Low global warming potential
Qualified non-toxic like SF6
The long road to an alternative
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225/45R17.
Environmental
• ~99% reduction in Global Warming Potential impact (vs. SF6)
• Same equipment dimension as SF6 switchgear
(lowest lifecycle impact of all available alternatives)
• Same temperature ranges as SF6 (-30 to 55C)
• No voltage or current limitation
Performance
• Classified non-toxic – same toxicity class as SF6
Safety
+
Novec 4710
C4F7N
CO2
+O2
g3: The solution to replace SF6
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225/45R17.v
145 kV GIS Lifecycle Assessment &
Environmental Impact
Substation Carbon Footprint Analysis
1
3
2
4
-70 %
G
A
S
+37%
Vacuum + Dry airSF6 g3
g3 products offers the lowest environmental
footprint over the full product life cycle
The gas GWP is not the criteria to assess the
carbon footprint of a switchgear
1 SF6 is the main contributor to the carbon footprint over 40yrs
2
g3 switchgear has same dimensions ➔ not changing other environmental impacts
3
g3 reduces significantly the gas impact (~ 1 % of the remaining impact)
Dry air insulation requires bigger switchgears→ This increase of size leads to a larger CO2 footprint and therefore a transfer of pollution
4
g3 Portfolio
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GAS-INSULATED
LINES
420 kV
For -30°C application
-99.3 %CO2 equivalent of
installed gas mass
GAS-INSULATED
SUBSTATIONS
145 kV
For -25°C application
-99.1 %CO2 equivalent of
installed gas mass
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AIS
CIRCUIT-BREAKERS
145 kV
For -30°C applications
-99.3 %CO2 equivalent of
installed gas mass
g3 Portfolio (as of 2021)
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g3 Product Roadmap
Latest progress in the range:
245 kV 63 kA single break interrupter in development
→ Main breaking performances
demonstrated
T10, T30, L75, T100, LC, OP2
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Successful technical cooperation with LS Electric Korea
TYPE TESTING FINISHED – END 2019
GAS-INSULATED SUBSTATIONS
170kV – 50kA – 60 Hz
PILOT @ KEPCO STARTED END 2020
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Hitachi ABB Power Grids moves to Fluoronitrile
On April 21st, 2021
GE and Hitachi ABB Power Grids announced the signature of an agreement
This will help accelerate the use of
fluoronitrile-based eco-efficient
insulation and switching gas in high-voltage
equipment as an alternative to SF6
Gas Management Solutions
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Gas supply
Gas handlingin factory
Gas handling on site
Operation & maintenance
End of life
g³ – Gas Management
Solutions developed with partners for complete substation life cycle
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First filling of equipment big quantities
g3 – Very Simple Gas Handling
Successful gas handling performed on all projects with premixed g³
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Filling - Bottle fluid
Top-up - Bottle gas
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GAS LEAKAGE DETECTION PPEGAS QUALITY CHECK
(HUMIDITY, RATIO)
GAS CARTS FOR GAS
FILLING, RECOVERY AND
TOPPING-UP
Complete set of tools developed to handle and check gas
safely and efficiently
g3 – Gas Handling Tools
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3 European factories industrialized to perform routine tests with g³
(1.2 M€ investment)
g3 – Gas Handling (GIS factory)
ROUTINE TESTS IN SWISS GIS FACTORY
WITH g³ ON COMPLETE
145 kV GIS BAYS
ROUTINE TESTS IN GERMAN
AIS FACTORY WITH g³ ON
145 kV AIS CIRCUIT BREAKERS
ROUTINE TESTS IN FRENCH
GIS FACTORY WITH g³ ON
420 kV GIL COMPONENTS
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g3 – Gas Handling (on site)
Successful gas handling performed on the first projects with g³
LIQUID TO GAS FILLING
INDOOR APPLICATION
Use of DILO gas cart
110 kV GIS in Switzerland
SMALL VOLUMES OF GAS
Gas to gas filling
145 kV CB in Switzerland
LIQUID TO GAS FILLING
OUTDOOR APPLICATION
Use of Air Liquide gas cart
420 kV GIL in England
LIQUID TO GAS FILLING
OUTDOOR APPLICATION
Use of Air Liquide gas cart
420 kV GIL in Scotland
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Adoption
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g3 Adoption
LEADING UTILITIES
Have decided to install
equipment with g3
25
g3 Gas–Insulated Lines
420 kV, -25 °C
10 sites – 5000+ meters
g3 Gas–Insulated Substations
145 kV, -25 °C
18 sites – 120 bays
g3 Gas–Insulated Substations
420 kV, -25 °C
1 sites – 9 bays
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g3 AIS – Live Tank CB
145 kV, -30 °C
10+ sites – 98 LT
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Fluoronitrile users list is growing in HV
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MANUFACTURERS
- GE (pioneer)
- HITACHI ABB
- LS Electric
- Hyundai
- Pinggao
- …
USERS
- TSO:
- National Grid (UK)
- SPEN (UK)
- SSEN (UK)
- RTE (FR)
- REE (SP)
- Statnett (NOR)
- TenneT (GER, NED)
- TransnetBW (GER)
- 50Hz (GER)
- KEPCO (KOR)
- …
USERS
- Others:
- AXPO(CH)
- Groupe E (CH)
- Eon (GER)
- Cerius (DEN)
- ELVIA (NOR)
- Stedin (DEN)
- Vattenfall (SWE)
- …
REFERENCES
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GISg3 GIL
g3 GIL
420 kV GIL, National Grid, UK
230m GIL, Sellindge Substation
Year of order: 2016 - Energization: 2017
in tons of CO2e
CO2e reduction
of installed gas masses
35,950
CO2e reduction
of emissions over 40 years
7,190
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GIS
GIL
g3
GIL
Year of order: 2017 - Energization: 2018
420 kV GIL, SPEN, UK
177m GIL, Kilmarnock Substation
in tons of CO2e
CO2e reduction
of installed gas masses
31,760
CO2e reduction
of emissions over 40 years
6,350
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1020m GIL, New Deer Substation
Year of order: 2018 - Commissioning: 2021
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in tons of CO2e
CO2e reduction
of installed gas masses
117,000
CO2e reduction
of emissions over 40 years
26,000
420 kV GIL, SSEN, Scotland
“We are delighted to be marking yet another first for SSEN
Transmission in the fight against climate change. Our
substations are vital to enabling the connection of
renewable energy to the grid, they play a key role in the
race to net zero emissions. That is why it is important that
we strive to make our new substations are as green as
possible by using new technology such as GE’s g3
insulated busbars.
“By using these innovations, we are not only reducing the
environmental impact on our own network, we are
demonstrating to the wider energy industry that there
is a viable alternative to SF6 out there, supporting
Government net zero targets, including the recently
announced interim 78% emission reduction target by 2035."
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530m GIL and 7 bays of 145 kV GIS, Fort Augustus Substation
Year of order: 2018 – Commissioning: 2021
in tons of CO2e
CO2e reduction
of installed gas masses
72,000
CO2e reduction
of emissions over 40 years
14,000
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132 kV GIS + 420 kV GIL, SSEN, Scotland
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2129m GIL and 9 bays of 420 kV GIS, Kintore Substation
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420 kV GIS + 420 kV GIL, SSEN, Scotland
Year of order: 2020 – Erection: 2025
in tons of CO2e
CO2e reduction
of installed gas masses
>350,000
CO2e reduction
of emissions over 40 years
>70,000
CB development
partially funded
by EU Life
program
-Confidential- . Not to be copied, distributed, or reproduced without prior approval.
420 kV GIL, STATNETT, Norway
160 m GIL, Hamang Substation (-30°C)
1st g3 in Norway:
Statnett supports Norway’s Decarbonization Goals with
GE’s Green Gas for Grid (g3) Technology:
• Transmission grid operator to install world’s first 420 kV Green Gas for Grid (g3) gas-insulated line
and busbars (GIL/GIB) operating at -30°C
• GE’s g3 technology is a game-changing alternative to sulphur hexafluoride (SF6), an insulating and
switching gas traditionally used in substation equipment and the most potent greenhouse gas in
the world
• GE’s g3 technology to help Statnett meet its goal of reducing its greenhouse gas emissions by 25
percent in 2025
- Ratings: 420 kV / 63 kA / 5000 A, -30°C
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110 kV GIS, AXPO, Switzerland
4 bays of 123 kV g3 + GIB
Year of order: 2017 - Energization: 2018
in tons of CO2e
CO2e reduction
of installed gas masses
8,710
CO2e reduction
of emissions over 40 years
1,740
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63 kV GIS, RTE, France
7 bays of 72,5 kV g³ GIS at Grimaud Substation
Year of order: 2017 – Energization: Oct. 2019
in tons of CO2e
CO2e reduction
of installed gas masses
17,750
CO2e reduction
of emissions over 40 years
8,880
-Confidential- . Not to be copied, distributed, or reproduced without prior approval.
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50 kV GIS, CERIUS, Haslev, Denmark
6 full 72.5 kV g³-GIS bays
Year of order: 2017 – Energization Sept. 2019
in tons of CO2e
CO2e reduction
of installed gas masses
9,230
CO2e reduction
of emissions over 40 years
1,850
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50 kV GIS, STEDIN, Netherlands
7 full bays of 72.5 kV g³-GIS including digital CT&VT (LPIT)
Year of order: 2017 - Energization: Nov. 2019
in tons of CO2e
CO2e reduction
of installed gas masses
13,700
CO2e reduction
of emissions over 40 years
2,740
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4 bays of 72.5 kV g³ GIS at Rodovre SS
Year of order: 2018 - Energization: Jan. 2020
in tons of CO2e
CO2e reduction
of installed gas masses
5,860
CO2e reduction
of emissions over 40 years
1,170
50 kV Project, Radius Elnet, Denmark
-Confidential- . Not to be copied, distributed, or reproduced without prior approval.
Year of order: 2018 - Commissioning: Fev. 2020
in tons of CO2e
CO2e reduction
of installed gas masses
1,460
CO2e reduction
of emissions over 40 years
295
1 bay of 72.5 kV g³ GIS, CANARIAS MOBILES, Fuerteventura
66 kV Project, REE, Spain
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110 kV project, EKW OEE, Switzerland6 full bays of 123 kV g³-GIS at UW Zernez
Year of order: 2018 -Energization: July 2019
in tons of CO2e
CO2e reduction
of installed gas masses
8,700
CO2e reduction
of emissions over 40 years
1,760
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132 kV Project, SPEN, UK16 bays DBB of 145 kV g³ GIS at Listerdrive SS
Year of order: 2018 - Commissioning: 2021
in tons of CO2e
CO2e reduction
of installed gas masses
23’400
CO2e reduction
of emissions over 40 years
4’680
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Summary
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Summary
• Gas impact: low global warming potential: 99 % reduction versus SF6
• Substation life cycle impact: lowest CO2 footprint of all SF6-free
substations
• Technical performance similar to today’s SF6 products
• Application: -25/-30oC and all voltage levels
• Toxicity: Same toxicity class as SF6 (new and polluted gas)
• Same dimensions and footprint as for SF6 products
• R&D roadmap will keep on evolving thanks to
new projects /regulations/volume of markets
• 25 TSO/DSO decided for g3
-Confidential- . Not to be copied, distributed, or reproduced without prior approval.
g3 is the first technical and economical alternative to SF6 for HV application
