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Static Var Compensator Status (SVCs for Booster and SPS) Situation in 2009 Karsten KAHLE, TE-EPC ATOP days 2009 5 March 2009
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1.Introduction 2.Operation of the SVCs 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions Static Var Compensator Status (SVCs for Booster and SPS) Situation in 2009 ATOP days 2009 5 March 2009
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1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009
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ATOP days 2009 5 March 2009 Transformer EHT1 EMD1/BE 18 kV Z = f (f) Introduction on SVCs Purpose of SVCs - Reactive power compensation - Harmonic filtering - voltage stabilisation (example SPS)
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1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009
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Operation in 2009 Operation - 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 SVCs SPS: D. Denuziere, X. Genillon LHC+Booster: J.-M. Bernal, L. Germain-Bonne -Training 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 SVC’s in progress (EDMS) - integration into EPC electronic logbook in progress
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Operation: Major Events in 2008 BEQ1: 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).
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1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009
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SVC Meyrin for Booster 66 kV (Prevessin) 18 kV PA1 18 kV Meyrin network Station ME9, b. 212 Booster TCR Booster Filters Meyrin network
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T hyristor C ontrolled R eactors (TCR) for Booster TCR (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)
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TCR coils of Booster SVC major crack
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Meyrin Filters for Booster (build. 202) 1 st floor: capacitors 2 nd floor: reactors 3 rd floor: resistors - Technical State: OK - MTTR: typically several hours
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1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009
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(2008) 50% of SPS 50% of SPS 400 kV 18 kV (2001) EHT1 BEQ3 BEQ2 Configurations of BE substation (simplified) EHT2 EHT3 (spare) BEQ1 (1974) +BB3 (1982) (spare)
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(2008) SPS 400 kV 18 kV (2001) EHT1 BEQ3 BEQ2 BEQ1 (1974) +BB3 (1982) (spare) EHT2 EHT3 (spare) Failure of BEQ3 (BE substation config.)
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(2008) SPS 400 kV 18 kV (2001) EHT1 BEQ3 BEQ2 EHT2 EHT3 (spare) Failure of BEQ2 (BE substation config.) BEQ1 (1974) +BB3 (1982) (spare)
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BEQ2 (2002) BEQ3 (2008) - Technical State: very good - All known problems were solved during maintenance - MTTR: typically several hours
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BEQ3 (2008)
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BEQ1 (1974)
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Supplier GEC ALSTHOM 1992: “The internal inspection revealed that the insulation on all the windings … had severely aged and exhibited signs of brittleness. The cores and windings … were very dark brown to black in colour and shrinkage of the insulation within the winding was apparent … … consequential loss in clamping pressure … It is firmly believed that the major portion of the life of the insulation has been used” (EDMS 813568) BEQ1 saturated reactor (1974): How much life time remains? (BEQ1 = spare SVC)
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BEQ3 (2008) BEQ1 (spare SVC): Major components have reached the end of their life time
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BB3 MICENE control system is working, but we would not be able to repair it. (BB3 = spare SVC) MICENE control system (obsolete) TCR controls Thyristor valve
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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 bank with BB3 capacitor bank with new BEQ3 Ref. EDMS: 930998
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- technical state: OK BEF4 for SPS stable network
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1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009
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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 3…6 months - Call for tender for spare coils in preparation - Spare coils will be available at CERN end of 2009
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1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009
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Conclusions all SVC’s: 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)
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Questions? Karsten KAHLE, TE-EPC
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