Conf12 Wallner

7/27/2019 Conf12 Wallner

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Gas-Insulated-Substations

SF6 gas handling

EPAs 2012 Workshop on SF6-emission reduction strategies

Atlanta, Georgia; April 17-18, 2012

Copyright Siemens AG

Energy Sector Power Transmission High Voltage SubstationsPeter GlaubitzChristian Wallner


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Introduction

SF6 in a lifecycle process CO2-footprint reduction of GIS

Handling of SF6

Regulations on SF6

Conclusion

Page 2Copyright Siemens AG

Energy Sector - Power Transmission - High Voltage SubstationsChristian Wallner


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Power Transmission



High Voltage Substations are the backbone of the Transmission System


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Requirements for

-

High system reliability

,

Compact space saving solutions Innovative solutions (devices, switchgears)

Low li e cycle costs

Reliable and competent partners (operator, manufacturer)

Smart and Power grid adaptation Environmental-sustainability




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SF6 is colorlessly, odorless and a

6

SF6 is 5x heavier than air, is not toxic and

SF6

is no hazardous material

SF6 has no eco-toxic potential

SF6 has no impact for the ozonosphere

SF6 is a potent greenhouse gas (GWP* 22,800** x CO2)



6 as exce en eec rca c arac ers cs

* Global Warming Potential; ** according to EU-F-Gas regulation


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SF6-emissions

l g

Herstellungroducing SF6 EntwicklungPr fungManufacturingProduktion

DevelopmentTests Commissioning

indust

ri

rocessi

SF6 is used in a closed cycle

UseecommissioningRecycling of SF6for reusedividual

cessing

in

pr



=


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SF6

6

Emission

SF6-handling losses SF6-leakage

+

Technical recommendation in e.g. Definition in IEC-standards,

Cigr SF6-Handling Guide No. 276 like IEEE C37.122, IEC 62271-203,Cigr SF6-Tightness Guide No. 430




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-

[%]

8D2

80

90

100

Size of building

Space requirement

Packing volume

example: the development of the

Siemens GIS 145 kV

40

50

60

8D8 8DN9

8DN8

0

10

20

68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98

source: Siemens

2010

The developments within the last decades have led to smaller gas

compartments of the switchgear and thus to considerably less used

year



amount of SF6 at the same performance data.


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6

-- 68%68%

-- 77%77%

-- 75%75%

8D.5 8DQ1

420 kV

8D.5 8DQ1

420 kV

8D.6 8DN8

145 kV

8D.6 8DN8

145 kV

8D.4 8DN9

245 kV

8D.4 8DN9

245 kV

type of GIS

A significant reduction of SF6 was reached by using modern development

Siemens GIS, Cable bay with double busbar system including 2 BBSiemens GIS, Cable bay with double busbar system including 2 BB DS, 1 line DS, 1 CB, 3 ESDS, 1 line DS, 1 CB, 3 ES



introduction of the GIS-technology in 1968


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Reduction of SF6-emissions in the factory

Test object is inside

Test box is equippedwith inspection

All connections are

gastight Operation of rupture

disc will allow SF6 toemitt in the test box

SF6 will be collectedin a closed cycle aftertestin



Internal arc testing without SF6-emission


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-

The componentes ng mus assure

very low SF6emission by usingstate-of-the-art-handling equipmentin the factories



Internal tightness of components


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-6

- - - -

equipment

regularly checks and trainedstaffs



Achieving low SF6 emission during production


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-6

Environmentally respondsiblebehavior and state-of-the-artequpmen s ea s o ow 6-emission in the factory



Source: GIS Factory Berlin


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Optimized gas work needs

1 mbar SF6- SF6- measurement SF - collectin devicemaintenance

unit

device

%- SF6,dew-point temperature,

for measurement of gas

6-

Source: DILO




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SF6 Recollection

Gas flows through theinstrument into recovery bag(SF6-recollecting pipe)

No emission!



Source: DILO, GAS-WIKA-Siemens


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6

Use of strong and big maintenance units - should be able to recoveru u

Minimum Residual pressure to be achieved < 20mbar - according to IEC62271-303-

compartments it's not always possible.




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6

10kg]

SFSF66--residual quantity (emission) dependence on the SFresidual quantit y (emission) dependence on the SF66 rated filling pressure /rated filling pressure /

compartment size / SFcompartment size / SF66 residual pressureresidual pressure

7

8

9

residualqua

ntity

[

420 kV-circuit breaker, 3-pole- volume: approx. 7000 l

- working pressure: 6,6 bar abs.

420 kV-disconnector, 3-pole

- volume: approx. 870 l

- working pressure: 4,8bar abs.

4

5

6SF6

- SF6-amount: approx. 300 kg

- SF6-density: 43 g/l

- SF6-amount: approx. 27 kg

- SF6-density: 26,7 g/l

1

2

3

With State-of-the-art-handling equipment SF6 recovery of each gas compartment

0 20 40 60 80 100 120 140 160 180 200

SF6 residual press ure [m bar]Source: Cigr-Guide no. 276; Application of table 25



very ow pressure - m ar s poss e, us securng osses o a easless than 2% during maintenance and end of life.


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Gas-tightness

Gas-tightness essential for the functionality static and dynamic solutions

IEC 62271-203 High-voltage switchgear and controlgear Part 203: Gas-insulatedmetal-enclosed switchgear for rated voltages above 52 kV (09/2011)

required leakage rate


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Type testing on SF6-tightness according to

Nowadays SF6-tightness can be confirmed (integral measuringprocess with state-of-the-art measurement devices) in the range of


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State-of-the-art

n

145 kV145 kV

1968

Number ofinstalled bays

evoluti

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Todays

experience

GI

2012.- No generic life limitation- Issues of aging and deteriorationGas leakages

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Originallyexpectedlife-time

Secondary systems Corrosion

FirstInstallation

0 5040302010



Continuous development assures the sustainable performance


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In the Past State-of-the-art-technology

6

Short maintenance intervals (frequentopening of gas compartments) 2 openings during life time: once after 25years of service, once during end-of-lifeprocedure after 40-50 years.

Limited SF6-handling instruction Detailed explained SF6-handling instructionand regulations

SF6-maintenance units with a minimum High power SF6-maintenance units with6- - 6-

Insensitive SF6-leakage detectors Sensitive SF6-leakage detectors to findsmallest leaks

- -

collecting the used gas

gas are now offeredFundamental tests and implementation ofnew production processes

Using Helium for leakage detection wherepossible (e.g. housing leakage test)



Since the implementation is a continuous improvement


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SF6 History 2005 Implementation

Based on the previous voluntary commitment(1996)

Agreed with and recognized by the GermanGovernment in 2005

Sco e: Switch ear and Com onents >1 kV

Quantified and dedicated targets for 2020 bylifecycles and responsibilities

Annual monitorin of activit data andemissions according to IPCC 2006Guidelines for verification

Mission:SF6-emissions should be avoided wherever possib le.

The specific quantity of SF6 used to fulfill functions is



.


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6

1.200.000 1,1Bestand (kg) Emissionsrate (%)

1.050.000

1.100.000

1.150.000

0,8

0,9

1

850.000

900.000

950.000

. .

inkg

0,5

0,6

0,7

in%

700.000

750.000

800.000

0,2

0,3

0,4

600.000

650.000

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

0

,



Emission on electric power equipment 2000 - 2010

- . .


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SF6-emissions

l g

Herstellungroducing SF6 EntwicklungPr fungManufacturingProduktionDevelopment

Tests Commissioning

indus

tri

roces

si

SF6 is used in a closed cycle

UseecommissioningRecycling of SF6for reusedividual

cessing

in

p

r

The EU-F-Gas regulation concentrates



=

on the individual processing


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EU-F-Gas regulation 842/2006

*

Regulation (EC) No 842/2006 of the European Parliamentand of the Council on fluorinated greenhouse gases

SF6 is considered in limited products only

The use of SF6 in electric power

equipment is permitted

Certain measures to be carried out bymanufacturers and users have been

Amendments have been released to



*California Air Resources Board


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European F-Gas-regulation 842/2006 -

6

(EC) 305/2008 definitions, minimum

Article 5 Trainin andRegulation (EC)

(EC) 1493/2007 defini tions, format

requirement on certification of staffcertification.on certainfluorinated

greenhouse* of reporting

(EC) 1494/2007 defini tions, formArticle 7 Labelling

o a e s



*) certain fl uorinated greenhouse gases means hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride (SF6)


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European F-Gas-regulation 842/2006, article 2

Definitions for SF6-handling

Recovery

Collection and storage of SF6 from electric power equipment or containers

in practice: taking out SF6 from equipment and putting it into a container Recycling

Reuse o recovered F6 ollowing a basic cleaning process in practice: recycling of SF6 on site Reclamation

* 6performance in practice: used SF6 is reprocessed (e.g. SF6-production plant)

Destruction

Transformation or destruction into one or more stable substances which are notfluorinated GHG in practice: burning of SF6

* - IEC 60376 S ecification of technical rade sulfur hexafluoride SF for use in electrical e ui ment



- IEC 60480 Guidelines for the checking and treatment of sulfu r hexafluoride (SF6) taken from electrical equipment and specification for its re-use


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*

Commission regulation No. 305/2008 establishing minimum requirements and

the conditions for mutual recognition for the certification of personnel recovering

certain fluorinated GHG from HV switchgear

Process and responsibilities

IndividualIndividualTrainingnotsubectto

Evaluation

bod / Proof of Certification

certificatecertificate

conditions of

regulation)

Examination

(content defined)

competenceo y ssues

certifications

Evaluation body andCertification body have

to be independent



*) regulation refers to HV switchgear only


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The reporting is a must to do in case of

SF6 > 1 t SF6 > 1 tcountry A country BImport Export

EuropeanUnion

or bottles or bottles

The reporting is not necessary for

import /import /import /import /

exportexport

exporexporinside EUinside EU

countriescountries

equipmentequipment < 1 t per< 1 t peryear andyear and

companycompany



In some countries additional voluntary commitments regarding reporting exist


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Standards required SF6-weight already in the past: declaration ofweight of gas according toIEEE C37.122 or IEC 62271-203

additional label*NEW

*

The label shall be placed clearly, indelibly andadjacent to the service point of the equipment

Weight of SF6 filling 99 kg



between the different manufactures


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Review required 5 years after implementation (7/067/11)

epor o e comm ss on pu s e on ep em er ,

includes 26 substances, one is SF6

positive results regarding our electrical power applications

strong reduction of F-gas-emission demanded in general

No modification for electrical power equipment, very small adjustments

-,

Other branches/ substances strongly affected

Draft of modified EU-F-Gas-regulation

will be available autumn 2012 (planned by EU-commission)

Final decision by the EU Parliament

Scheduled until beginning of 2014



Link: http://ec.europa.eu/clima/policies/f-gas/index_en.htm


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SF RECYCLING6GUIDE

No. 234

Avoid SF6handlinglosses due to state-of-the-art handling

2003SF6 HANDLING

GUIDE

Guarantee of SF6 tightness due to state-of--

.

2005 SF6 TIGHTNESSGUIDE

2012

Cigr SC B3 delivers and bundles

all technical and environmentally

No. 430



aspects on SF62010


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6

WG B3.17 Residual life concepts applied to HV GIS

(Finished, will be published in 6/2012) WG B3.25 SF anal sis for AIS1/GIS and MTS2 Condition Assessment

WG B3.30 Guide to minimize the use of SF6 during routine testing

1 Air Insulated Switchgear2 Mixed Technology Switchgear



Brochures can be downloaded on http://www.e-cigre.org/


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- ommon spec ca ons or 6- nsua e an air-insulated high-voltage switchgear and controlgear

IEC 62271-200 Standard of medium-voltage SF6-GIS

- - Revision published in 9/2011

IEC 62271-3031 Use and handling of SF6

IEC 603762 Specification for new SF6-gas IEC 604802 Checking and treatment of sulfur hexafluoride (SF6) taken from electric equipment IEEE C37.122 Gas Insulated Substations IEEE C37.122 IEEE Guide for Sul hur Hexaflouride

ASTM D2472-00 SF6-gas1 Revision in progress: IEC 62271-42 Maintenance of the standardscheduled until 2014.



Target: 1 standard only, SF6-Gas mixtures to be included, recommendation on monitoring


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Implementation of adequate maintenance

strategy for aged equipment

Evaluation of each SF6-leakage for

systematical or individual failure

Gas tight equipment and low SF6

-emission

reduce life-cycle costs

Residual Life of equipment goes in line with

ow6-emss on

For end-of-life procedures, SF6 has to be




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Thank you for your attention!

GIS Lead-Factory Berlin, Germany



r. r s an a ner

Tel. +49 9131 7 33811

eMail [email protected]

e er au z

Tel. +49 9131 7 35010

eMail [email protected]

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