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

2. 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

3. 1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009

4. 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)

5. 1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009

6. 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

7. 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).

8. 1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009

9. SVC Meyrin for Booster 66 kV (Prevessin) 18 kV PA1 18 kV Meyrin network Station ME9, b. 212 Booster TCR Booster Filters Meyrin network

10. 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)

11. TCR coils of Booster SVC major crack

12. 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

13. 1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009

14. (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)

15. (2008) SPS 400 kV 18 kV (2001) EHT1 BEQ3 BEQ2 BEQ1 (1974) +BB3 (1982) (spare) EHT2 EHT3 (spare) Failure of BEQ3 (BE substation config.)

16. (2008) SPS 400 kV 18 kV (2001) EHT1 BEQ3 BEQ2 EHT2 EHT3 (spare) Failure of BEQ2 (BE substation config.) BEQ1 (1974) +BB3 (1982) (spare)

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

18. BEQ3 (2008)

19. BEQ1 (1974)

20. 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)

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

22. 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

23. 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

24. - technical state: OK BEF4 for SPS stable network

25. 1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009

26. 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

27. 1.Introduction 2.Operation 3.SVC Meyrin for Booster 4.SVCs for SPS 5.Spares 6.Conclusions ATOP days 2009 5 March 2009

28. 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)

29. Questions? Karsten KAHLE, TE-EPC