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Cigre WG A3-06 “HV Equipment Reliability”Cigre WG A3-06 “HV Equipment Reliability”

Preliminary Results from Present Preliminary Results from Present CigreCigre SurveySurvey

DisconnectorsDisconnectors and Earthing switchesand Earthing switchesPopulation cards 2004Population cards 2004

Failure cards 2004 and 2005 (partly)Failure cards 2004 and 2005 (partly)

WG A3WG A3--06 Tutorial06 Tutorial TF TF DESDES

June 2006June 2006 J.G. J.G. KroneKrone, A. , A. HyrczakHyrczak, , KyongKyong--Yop Yop Park,Park,

Rio de JaneiroRio de Janeiro S. S. DesantiDesanti, T. , T. KuntzeKuntze

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First survey on reliability of First survey on reliability of DisconnectorsDisconnectors and and EarthingEarthingswitchesswitches

Total of 21 countries participated both in GIS and AIS Total of 21 countries participated both in GIS and AIS equipmentequipment

SoSo far for far for 20042004 a total of a total of 223 820223 820disconnector/earthingswitchesdisconnector/earthingswitches are includedare included

Of which Of which 164669164669 in in AISAIS and and 5915159151 in in GISGIS


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Centre-break

disconnector

Double-break

disconnector


Type of design

4

Knee-type

Disconnector

Vertical-break

Disconnector


Type of design

5

Semi-pantograph

disconnector

Pantograph

disconnector


Type of design

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WG A3.06 - Reliability of HV equipment – DES population (2004)WG A3.06 - Reliability of HV equipment – DES population (2004)

0

10000

20000

30000

40000

50000

60000

70000

60-100 kV 100-200kV 200-300kV 300-500kV 500-700kV >>700kV

Voltage class

Number per Voltage Class and Application

AISGIS-1phaseGIS-3phase

7


0

5000

10000

15000

20000

25000

30000

35000

40000

60-100kV 100-200kV 200-300kV 300-400kV 500-700kV >>700kV

Voltage class

Number per Voltage and Design

Center BreakDouble BreakKnee TypeVertical BreakSemi PantographPantographGIS DisconnectorLow Speed ESHigh Speed ESOther

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0

5000

10000

15000

20000

25000

30000

35000

40000

60-100kV 100-200kV 200-300kV 300-500kV 500-700kV >>700kV

Voltage Class

Number per Voltage and Kind of Service

LineTransformerBusbarESOther

9


0

5000

10000

15000

20000

25000

30000

35000

40000

45000

60-100kV 100-200kv 200-300kV 300-500kV 500-700kV >>700kvVoltage Class

Number per Voltage Class and Operating Mechanism

Electric - motorPneumaticSpringManualOther

10


0

10000

20000

30000

40000

50000

60000

70000

60-100kV 100-200kV 200-300kV 300-500kV 500-700kV >>700kV

Voltage Class

Number per Voltage Class and Location

IndoorOutdoorGIS IndoorGIS Indoor (s)GIS Outdoor (n)Hybrid GIS Indoor (N)GIS Out (S)Hybrid GIS Outdoor

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0

10000

20000

30000

40000

50000

60000

60-100kV 100-200kV 200-300kV 300-500kV 500-700kV >>700kV

Voltage Class

Number per Voltage Class and Maintenance Philosophy

Time basedCondition basedRun to FailureCombination

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Distribution GIS 1ph1%

21%

30%28%

20%

Distribution AIS

12%1% 1%

38%

48%

Distribution Total

16%

26%

33%

24%1% <<1974

1974-19831984-19931994-20032004-2007

Distribution GIS 3ph

30%

37%

27%

1% 5%

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0

5000

10000

15000

20000

25000

30000

35000

40000

<< 1974 1974 to 1983 1984 to 1993 1994 to 2003 2004 to 2007

Age

Number per Voltage class and Age

60-100kV 100-200kV 200-300kV 300-500kV 500-700kV >>700kV

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WG A3.06 - Reliability of HV equipment – DES failuresWG A3.06 - Reliability of HV equipment – DES failures

Minor / Major failure v. application

0%10%20%30%40%50%60%70%80%90%

100%

GIS - 1 phase GIS - 3 phase AIS

MajorMinor

15


Line Transformer

BusbarEarthing switch

Other

0%10%20%30%40%50%60%70%80%90%

100%

Minor / major failure v. kind of service

Major

Minor

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Minor failure v. kind of service

42%

8%36%

13% 1%LineTransformerBusbarEarthing switchOther

Major failure v. kind of service

40%

10%30%

19% 1%LineTransformerBusbarEarthing switchOther

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Minor failure v. operating mechanism

1%

0%

33%

62%

4%

Electric motorPneumaticSpringManualOther

Major failure v. operating mechanism

39% 55%

0%6%0%

Electric motorPneumaticSpringManualOther

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Minor failure v. service condition

2%

40%27%

0%

31%0%

Deenergised, availablefor serviceNormal service - nooperationNormal serviceoperation demandedFault making operation

Operation withoutcommandDuring or directly aftertesting, maintenance

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Major failure v. service condition

6%0%

1%

8%

24%

61%

Deenergised, availablefor serviceNormal service - nooperationNormal serviceoperation demandedFault making operation

Operation withoutcommandDuring or directly aftertesting, maintenance

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Minor failure v. design

1%

2%

1%

4%

6%

0%

2%

12%

21%

51%

Center break

Double break

Knee type

Vertical break

Semi pantograph

Pantograph

GIS disconnector

Low speed earthing switch

High speed earthing switch

Other

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Major failure v. design

43%

21%

3%

7%

0%

3%

5%

18%

0%

0%

Center breakDouble breakKnee typeVertical breakSemi pantographPantographGIS disconnectorLow speed earthing switchHigh speed earthing switchOther

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Type of repair12%

62%21%

2%

0%

1%

2%

Repair of failed component on siteRepair in factory or shopReplacement of failed component on site (without replacement of enclosure)Replacement of failed component and its enclosureReplacement of failed equipment with another designReplacement of seals or refilling onlyPlaced back into service without repair

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Thanks for your attentionThanks for your attention

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