Static Var Compensator Status(SVCs for Booster and SPS)Situation in 2009Karsten KAHLE, TE-EPCATOP days 2009 5 March 2009

IntroductionOperation of the SVCsSVC Meyrin for Booster SVCs for SPSSparesConclusionsStatic Var Compensator Status(SVCs for Booster and SPS)Situation in 2009ATOP days 2009 5 March 2009

IntroductionOperationSVC Meyrin for Booster SVCs for SPSSparesConclusionsATOP days 2009 5 March 2009

ATOP days 2009 5 March 2009Transformer EHT1EMD1/BE 18 kVIntroduction on SVCsPurpose of SVCs Reactive power compensation - Harmonic filtering voltage stabilisation(example SPS)

IntroductionOperationSVC Meyrin for BoosterSVCs for SPS SparesConclusionsATOP days 2009 5 March 2009

Operation in 2009Operation 1.1.2009: Technical responsibility for SVCs transferred from EN-EL to TE-EPC Convention for joint operation in 2009 between EN-EL and TE-EPC Two new EPC teams of Equipment Responsibles for SVCsSPS: D. Denuziere, X. GenillonLHC+Booster: J.-M. Bernal, L. Germain-BonneTraining of the new Equipment Responsibles in progress In case of Alarms/Trips: CCC calls piquet EL and piquet EPC (injectors)

Annual maintenance Jan.-March 2009: annual maintenance done by TE-EPC

Documentation- revision of documentation for all SVCs in progress (EDMS) integration into EPC electronic logbook in progress

Operation: Major Events in 2008BEQ1: EDMS 945725, 945728, 945729- Protection trips of bypass capacitors of saturated reactor (solved).

BEQ3: EDMS 945704, 963394, 964141 Capacitor failures and starpoint balancing in harmonic filter F7 (solved). Persistent teething problems of new ABB control system (solved).

IntroductionOperationSVC Meyrin for Booster SVCs for SPSSparesConclusionsATOP days 2009 5 March 2009

SVC Meyrin for Booster66 kV (Prevessin)18 kV PA118 kV Meyrin networkStation ME9, b. 212BoosterTCR BoosterFilters MeyrinMeyrinnetwork

Thyristor Controlled Reactors (TCR) for BoosterTCR(1997)Observations:- Cracks found in TCR coils

Actions:- Repaint TCR coils (Q2/2009)- Purchase spare (IT in Q2/2009) - Spare coils available end of 2009- Technical State: OK- MTTR: typically several hours (except defective coils)

TCR coils of Booster SVCmajor crack

Meyrin Filters for Booster (build. 202)1st floor: capacitors2nd floor: reactors3rd floor: resistors- Technical State: OK- MTTR: typically several hours

IntroductionOperationSVC Meyrin for Booster SVCs for SPSSparesConclusionsATOP days 2009 5 March 2009

(2008)50% ofSPS50% of SPS400 kV18 kV(2001)EHT1BEQ3BEQ2Configurations of BE substation(simplified)EHT2EHT3(spare)BEQ1 (1974)+BB3 (1982)(spare)

(2008)SPSSPS400 kV18 kV(2001)EHT1BEQ3BEQ2BEQ1 (1974)+BB3 (1982)(spare)EHT2EHT3(spare)Failure of BEQ3 (BE substation config.)

(2008)SPSSPS400 kV18 kV(2001)EHT1BEQ3BEQ2EHT2EHT3(spare)Failure of BEQ2 (BE substation config.)BEQ1 (1974)+BB3 (1982)(spare)

BEQ2 (2002)BEQ3 (2008)- Technical State: very good- All known problems were solved during maintenance- MTTR: typically several hours

BEQ3 (2008)

BEQ1 (1974)

Supplier GEC ALSTHOM 1992:The internal inspection revealed that theinsulation on all the windings had severely aged and exhibited signs ofbrittleness. The cores and windings were very dark brown to black in colourand shrinkage of the insulation within thewinding was apparent consequential loss in clamping pressure It is firmly believed that themajor portion of the life of the insulationhas been used (EDMS 813568)BEQ1 saturated reactor (1974): How much life time remains? (BEQ1 = spare SVC)

BEQ3 (2008)BEQ1 (spare SVC): Major components have reached the end of their life time

BB3 MICENE control system is working, but we would not be able to repair it.(BB3 = spare SVC) MICENE control system(obsolete)TCR controlsThyristor valve

The future role of the BB3 compensator BEQ1 and BB3 always operate together BB3 needed as long as we keep BEQ1 (as spare)

New BEQ3 replaces BEQ1 + BB3 Harmonic performance of BEQ3 is better than BEQ1 + BB3 without BB3 capacitor bankwith BB3 capacitor bankwith new BEQ3Ref. EDMS: 930998

technical state: OKBEF4 for SPS stable network

IntroductionOperationSVC Meyrin for Booster SVCs for SPSSparesConclusionsATOP days 2009 5 March 2009

Spares- Spare parts inventory for all SVCs currently in progress (Q1+Q2/2009) Acquisition of additional spares in Q2/2009

Spare coils - About 250 coils installed at CERN (40 different types) MTBF: only 1 coil failure within 25 years (TCR PA4) Delivery time for a replacement coil about 36 months Call for tender for spare coils in preparation Spare coils will be available at CERN end of 2009

IntroductionOperationSVC Meyrin for Booster SVCs for SPSSparesConclusionsATOP days 2009 5 March 2009

Conclusions all SVCs: thorough preventive maintenance SVC for Booster, BEQ2 and BEQ3 for SPS are in a good state spare SVCs BEQ1+BB3 are operational, but approaching end of life time (decision required if we invest in spare parts for BEQ2 and BEQ3 or into a consolidation program for BEQ1+BB3)

Questions?Karsten KAHLE, TE-EPC

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