Nagyfeszültségü gàzszigetelt berendezések (GIS)

élettartam költségeinek szàmitàsa

HV GIS - Life cycle cost calculations

Endre MIKES

AREVA T&D

Senior Expert, Müszaki Tanàcsos

MEE 57. Vàndorgyülés, Siofok, 2010 Szept. 16

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� LCC calculations cover not only

LCC Calculations

� purchasing costs of S/S’s but

� all costs during the whole life cycle

� Investment cost, land costs

� Operation costs (incl. maintenance, running cost and failure)

� Renewal, disposal cost

� databases, statistics are needed for components, substations, general costs

� calculation of cost for many different cases baywise, substationswise, yearwise or periods

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GIS Example - F35 S/S Hinterthal Switz.

Single busbar substation:

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� Architecture and basics of AL3C

LCC Calculations – AL3C

� AL3C uses an easy to use graphical user interface

� AL3C can calculate the following cost

� Investment cost

� Operation cost (incl. maintenance, running cost and failure)

� Disposal cost

� AL3C uses two databases a component and substation database

� AL3C calculates the cost baywise with variables

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AL3C: Implemented LCC scheme

Life Cycle Cost

Investment Cost(Acquisition Cost)

Operation CostDisposal Cost

(Ownership Cost)

RunningCost

ScheduledMaintenance

UnscheduledMaintenance

ComponentReplacement

Cost

Penalty CostOutage Cost

FailureCost

AdditionalInput

Data

(IEC 60300-3-3)

� Implemented life cycle cost scheme

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� Component database

AL3C: GUI and Input

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� Substation database

AL3C: GUI and Input

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� Substation Layout

AL3C: GUI and Input

linebay

trans-former

bay

linebay

transformerbay

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Investment Cost

� Land

� Foundation + Building

� Substation Layout

� Packing + Shipment

� Erection + Commissioning

� Secondary Equipment + Monitoring

� Studies + Management

� Spare Parts

� Training of Personnel

� Special Tools + Test Equipment

� Cost of each component (CB, CT, VT, ES etc)

AL3C: Calculation Basis

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Operation Cost

� Energy Consumption of the Components

� Employee Cost

� Storage of Spare Parts

� Scheduled Maintenance incl. Planningand Financial Loss due to undelivered Power

AL3C: Calculation Basis

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Cost

� Component Replacement Cost in case of Failure

� End of Series Production

� Rise of the Component and ReplacementCost after some Years

� Penalty Cost + additional Failure Cost

� Financial Loss due to undelivered Energyin case of a Failure

AL3C: Calculation Basis

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Probabilities

AL3C: Calculation Basis

design, production, installation:first Weibull-distribution

maintenance: third Weibull-distribution

ageing: second Weibull-distribution

time (years)

failu

rera

te λ

(1)

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Probability of GIS

AL3C: Calculation Basis

Major failures by time in service - 12.2008 - 72.5 kV-245 kV SEH

0

5

10

15

20

25

30

35

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33.

14 (13.3%) External influence

23 (21.2%) Human error

2 ( 1.8%) Transport damage

12 (10.6%) Design fault

12 (10.6%) Manufacturing fault

9 ( 8.8%) Material fault

14 (13.3%) Voltage transformer

21 (20.4%) Insulation defect

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Probability for GIS

AL3C: Calculation Basis

produced GIS bays until 12.2008 - 72.5 kV-245 kV SEH

0

100

200

300

400

500

600

700

800

900

1000

2008

2006

2004

2002

2000

1998

1996

1994

1992

1990

1988

1986

1984

1982

1980

1978

1976

1974

1972

1970

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Probability of GIS

AL3C: Calculation Basis

time (years)

failu

rera

te λ

(1)

AL3C uses a constantfailure rate because the

Weibull-distributions arenot seen for GIS

λλλλ

f(t): failure probability density function F(t): failure distribution

R(t): reliability distribution λ: failure rate

Implemented exponential failure distribution

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Probability B65

AL3C: Calculation Basis

B65 GIS with internal failure statistic (2 failures in 2469 bay years)

B65 GIS with Cigré 2000 statistic failure rates

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Failure Probability Calculation

AL3C: Calculation Basis

serial

circuit

parallel

circuit

FS(t): failure distribution of the system Fx(t): failure distribution of the component x

RS(t): reliability distribution of the system Rx(t): reliability distribution of the component x

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Life Cycle Cost

Investment Cost

(Acquisition Cost)Operation Cost

Disposal Cost(Ownership Cost)

Running

Cost

Scheduled

Maintenance

Unscheduled

Maintenance

Failure

Cost

� Disposal Cost

� Disassembly Cost

� Recycling Cost

AL3C: Calculation Basis

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� Output

AL3C: Output

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Single Busbar Configuration

� Output

AL3C: Output

Double Busbar Configuration

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F35-4 (145kV)

GL318 (800kV)

GL310 (100kV)

DT2-550 (550kV)

Application of FK3-X mechanisms within AREVA T&D

T155-2 (550kV)

FKG1 (27.5kV)

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Business-year 2003 2004 2005 2006 2007

Number of CB-bays in

service *2’915 3’145 3’283 3'660 4782

No. of CB-bay-years in

service*34’292 37’283 40'498 44'021 47'000

Major failures in business-

year7 3 3 3 7

Cumulated no of major

failures91 94 97 100 107

Major failure frequency

(Failures/100 bay-years)0.27 0.25 0.24 0.23 0.23

Meantime between major

failures MtbF (years for one

bay)

377 397 418 440 439

*) Number of bays and bay years based on handover date to customer (without load break switch bays)

72.5 – 245 kV GIS from SEH unit

Major failure statistic for December 2007

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66 - 550 kV GIS from BHT unit

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GIS F35Compact 145 kV GIS S/S

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� Example AIS vs. GIS – ADP Orly 225 kV

� 2400 m2 vs. 750 m2

� Length and height of bay 84 & 16 m vs. 21 & 8 m only

S/S Study Example (1)

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� Example AIS vs. GIS – ADP Orly 225 kV

The Task: Optimization of initial investmentsReduction of energy costsMinimization of substation footprintsCompliance with the airport safety rulesTo not disturb the radio navigation equipment of aircraft

The Results:�The substation will be realized in two steps:Step 1 involves a 40 MVA transformer connected to a GIS circuit breaker bay. Step 2 involves a second 40 MVA transformer to be installed and connected to the GIS with a circuit breaker bay and a busbar element.

PBT: pay back timeADP has calculated the pay back time for both steps of realization. The following equation was taken into account:

Ac(t): Acquisition cost (design, building, commissioning)Op(t): Operation cost (maintenance, replacement)Eg(t): Energy gain (energy transit, profit on resale)

The calculation shows that the substation realized with only one transformer (only step 1) will be paid back in about 8 years.

� If the second transformer and the corresponding switchgear is also realized the cost will be paid back in about 11 years

S/S Study – Example (2)

)()()( tEgtOptAcPBT −+=

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� Life Demonstration of AL3C

� Comparison between an AIS and a GIS substation with the same layout

� Comparison between a B65 GIS with Areva internal failure data and the same substation with the Cigré brochure 150 1)

failure rates

1) Cigré brochure 150, REPORT ON THE SECOND INTERNATIONAL SURVEY ON HIGH VOLTAGE GAS INSULATED SUBSTATIONS (GIS) SERVICE EXPERIENCE, Working Group 23.02, February 2000

AL3C: Demonstration

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GIS példàk – a megfelelö alàllomàsi technologiàt akkor, ha…..

Tokozott GIS – igy mindenre, mindenhol és mindig van megoldàs !

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� Tokozott GIS 31 éve a földalatt, Zürich Sihlfeld S/S, 150/170 kV, 7+1 mezö, 3x40 MVA trafo

� Kérdések?

� Köszönöm szives figyelmüket !

endre.mikes@areva-td.com