CIGRE WG A306 Intermediate Results Circuit … CIGRE WG A3.06 Reliability of High Voltage Equipment...
Transcript of CIGRE WG A306 Intermediate Results Circuit … CIGRE WG A3.06 Reliability of High Voltage Equipment...
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
CIGRE WG A3.06 CIGRE WG A3.06 CIGRE WG A3.06 CIGRE WG A3.06
ReliabilityReliabilityReliabilityReliabilityof of of of
High Voltage EquipmentHigh Voltage EquipmentHigh Voltage EquipmentHigh Voltage Equipment
Intermediate ResultsIntermediate ResultsIntermediate ResultsIntermediate ResultsCircuit BreakersCircuit BreakersCircuit BreakersCircuit Breakers
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Population
Population
Population
Population
datadatadatadata
Old Old Old Old SurveySurveySurveySurvey 1988198819881988----91919191
70.708 CB 70.708 CB 70.708 CB 70.708 CB yearsyearsyearsyears
22 countries New New New New SurveySurveySurveySurvey55.088 CB / 200446.470 CB / 20056.329 CB / 2006
14.763 CB / 2007
122.650 CB 122.650 CB 122.650 CB 122.650 CB yearsyearsyearsyears
21 countries
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Age Distribution
Age Distribution Total 122650 CB years
before 1979 1979-1983 1984-1988 1989-1993 1994-1998 1999 -2003 2004-2007
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Voltage distributionOld survey
700 ≤ V0%
100 ≤ V < 20033%
500 ≤ V < 7003%
63 ≤ V < 10035%
200 ≤ V < 30015%
300 ≤ V < 50014%
Voltage distribution
Voltage distributionNew survey
>= 700 kV0,1%
100<= ... <200 kV
35,7%
500<= ... <700 kV
2,7%
60<= ... <100 kV
36,7%
200<= ... <300 kV
14,5%
300<= ... <500 kV
10,2%
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Type of enclosureOld survey
Non metal enclosed
57%
Metal enclosed
43%
Type of enclosure
Type of enclosure New survey
GIS - 1 phase
18%
GIS - 3 phase
15%
Non metal enclosed
38%
Dead tank29%
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
LocationOld survey
Indoors15%
Outdoors
85%
Location
LocationNew survey
Outdoor84%
Indoor16%
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Kind of service
Kind of service
Transformer25%
Cable6%
Shunt reactor1%
Capacitor3%
Bus-coupler10%
Other1%
Overhead line54%
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Type of operating mechanismOld survey
Pneumatic
30%
Hydraulic52%
Spring18%
Type of operating mechanism
Type of operating mechanism New survey
Other1%
Spring49%
Hydraulic27%
Pneumatic23%
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Maintenance philosophy
Maintenance philosophyNew survey
Other0,2%
Time based57,2%Condition
based4,7%
Run to failure0,0%
Combination37,9%
Population
Population
Population
Population
datadatadatadata
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
FailureFailureFailureFailure DistributionDistributionDistributionDistribution
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Failure classificationold survey
major12%
minor88%
Old SurveySurveySurveySurvey1988-91
Minor: 3358
Major: 475
New New New New SurveySurveySurveySurvey
up to 2007: up to 2007: up to 2007: up to 2007:
2342 2342 2342 2342 reportsreportsreportsreports
Failure classification
Failure
Failure
Failure
Failure
data
data
data
data
Failure classificationnew survey
major
minor
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Contribution environment "major"Old survey
Rain0%
Strong w ind1%
Snow, ice or hoar—frost
1%Sudden variation in temperature
2%
Corrosive atmosphere
0%
Fog or high humidity
1%
Lightning3%
Others 1%
Pollution including dust
0%
No contribution
91%
Failure
Failure
Failure
Failure
data
data
data
data
Contribution of environment
Contribution environment "major"New survey
No contribution
93%
contribution7%
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Service conditions Old survey
0
500
1000
1500
2000
2500
3000
In service oravailable for
service
Duringmaintenance
Other cases
major
minor1 2 3 4 5 6
Service conditions / New survey
minor
major
Failure
Failure
Failure
Failure
data
data
data
data
Service conditions
1 de-energized - Available for service
2 Normal service - no operation command
3 Normal service operation demanded
4 Fault clearing operation
5 Operation occurred without command
6 During or directly after testing / maintenance
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Major failure modes
Main failure modes:
1+2 Does not close / open on command
20 Locking in open or closed position by the control system
21 Loss of mechanical integrity
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
Major failor modeOld survey
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
Major failor modeNew surveyFa
ilure
Failure
Failure
Failure
data
data
data
data
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Components responcible
Component atservice voltage
Electrical controland auxiliary circuits
Operatingmechanism
Kinematic chain
Components responsible for major failures
New survey%Old survey%
Failure
Failure
Failure
Failure
data
data
data
data
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Components responsible
Components responsible for MF dependence on age
before 1984 1984 - 1993 1994 - 2003
Component at service voltage
Electrical control and auxiliary circuits
Kinematic chain
Operating mechanism
Failure
Failure
Failure
Failure
data
data
data
data
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
Major failure rate
Major failure rate / age
before 1984 1984 - 1993 1994 - 2003
Failure
Failure
Failure
Failure
data
data
data
data
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
• The majority of the CB´s is used at service voltages between 60 and 200 kV
• The majority of the CB´s is installed outdoors
• 54% of the CB´s are used for overhead lineswitching
• The mainly used type of operating mechanism has changed from hydraulic to spring design
• Most of the failures seem to happen during normal service
• Leakage of SF6 or oil seems still to be a problem
• Operating mechanisms are still the most reportedcomponents responsible for mayor failures
Main Conclusions
Failure
Failure
Failure
Failure
data
data
data
data
Population
Population
Population
Population
datadatadatadata
But gettingbetter!
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CIGRE WG A3.06 Reliability of High Voltage Equipm entIntermediate Results CIRCUIT BREAKERS
CIGRE WG A3.06 CIGRE WG A3.06 CIGRE WG A3.06 CIGRE WG A3.06 IntermediateIntermediateIntermediateIntermediate ResultsResultsResultsResultsCircuit BreakersCircuit BreakersCircuit BreakersCircuit Breakers
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