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POPS commissioning Jean-Paul Burnet BE/OP shutdown lectures, 31 January 2011

POPS commissioning Jean-Paul Burnet BE/OP shutdown lectures, 31 January 2011. Basic principle. Magnets current and voltage . Stored magnetic energy . 12MJ . Power to the magnets. Capacitor banks voltage. Power from the mains . 5kV to 2kV. 10MW . +50MW peak .

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POPS commissioning Jean-Paul Burnet BE/OP shutdown lectures, 31 January 2011

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  1. POPS commissioningJean-Paul BurnetBE/OP shutdown lectures, 31 January 2011

  2. Basic principle Magnets current and voltage Stored magnetic energy 12MJ Power to the magnets Capacitor banks voltage Power from the mains 5kV to 2kV 10MW +50MW peak

  3. POPS reception tests with CONVERTEAM Final reception tests ended in December 2010. But still missing: The DC-link to the PS magnets Validated on SPS spare magnets !! (10% of the PS magnet) Objective 2011: Put POPS in operation

  4. POPS DC-link Construction of a DC-link to the PS magnets. Cables delivery in December. Civil engineering work in October and December. Cabling in January DC link to be delivered by end of January

  5. POPS DC-link December works!

  6. POPS DC-link December works!

  7. POPS DC-link All cables are in place and connected! DC link is ready just today!!!

  8. POPS to PS magnets Selection switches between MPS & POPS

  9. Re-start of POPS on the SPS magnets At nominal peak current: 6kA But at low rms current (1kA) and low output voltage (<1kV) Only 1/10 of the nominal energy (1.8MJ instead of 12MJ) Done this week-end to check everything before powering the PS! 10 SPS magnets 6kA peak 10 mH

  10. POPS to PS magnets Last hardware modifications All the capacitors to be connected Busbar & switches to be checked Interlocks to be checked

  11. POPS commissioning First, the power transformers (2.5MVA) Tr1 and Tr2 tested at no load. Maximum Inrush observed 7.5*In Still to be done: Heat run (impossible without the load!) Already done! No need to repeat !

  12. POPS commissioning Test of the capacitor banks individually Capacitor charged up to 4.2kV with an external power supply Discharged through the 96 ohm resistance. Max resistor ΔT 140ºC Already done! No need to repeat !

  13. POPS commissioning Test of AFE with a capacitor bank Already done! No need to repeat ! 16s 30s Vdc Vdc+; Vdc- Id Precharge with limiting resistor Precharge without limiting resistor C B closed and AFE modulating

  14. POPS commissioning progress step by step Power up AFE1 + DCDC1 + DSP1 + magnets Power up AFE1 + DCP1+ DSP1 + DCP3 + DSP3 + magnets Power up AFE1 + DCP1+ DSP1 + DCP3 + DSP3 + DCP5 + DSP5 + magnets Already done! No need to repeat !

  15. POPS commissioning The test will start directly with the complete system. POPS start-up. Charge of the capacitor banks.

  16. POPS commissioning with the PS magnets First pulse in current loop with P80i. Increase of current step by step.

  17. POPS commissioning with the PS magnets Test of crow-bar protection. Magnet current decay.

  18. POPS performance • Current balance • Interleaving • Energy management • Output voltage ripple • Feedback loop

  19. POPS control All IGBT are fired directly by the main controller via optic fibers. CERN provide the function generator (FGC) including the digital current loop. The main controller receives a voltage reference from the FGC. The main controller has two powerful CPU with dedicated software tools From Converteam. Operators will use an HMI for cmd & status.

  20. POPS control

  21. POPS control

  22. POPS commissioning with CCC • FGC control • CCC cycles • Bloop performance • Heat run • HMI • Post-mortem

  23. POPS degraded mode • If enough time, degraded mode can be tested: • POPS can work with : • Only 1 transformer over 2 (rms magnet current reduced by 40%) • Only 1 AFE over 2 (rms magnet current reduced by 40%) • Only 5 DCP over 6 • only 5 DSP over 6

  24. POPS Safety • No change for CCC in safety procedure (veto CCC) • No change for magnet grounding (to be done as for MPS at the same place)

  25. POPS commissioning planning Commissioning: General planning

  26. POPS commissioning planning 28-31 January: Tests on SPS spare magnets Requires only P80i (Converteam local control). check that POPS works correctly before switching on the PS magnets 31 January: DC-link connection + Safety interlock tests Connect the full capacitors banks Connect POPS to the DC-link Check of the magnet interlocks Check of CCC Veto Check of POPS – MPS interlocks

  27. POPS commissioning planning • 31 January – 3 February: POPS start-up • Requires only P80i (POPS local control system). • Tests: • POPS pre-charge • POPS first pulse • Different working modes • Current control with P80i • … • Verifications: • Discharge-Charge of capacitor banks during cycles • Power drawn from AC network • Performances

  28. POPS commissioning planning • 3-6 February: POPS with FGC • Requires P80i + FGC. • Tests: • Functional test of the full converter • B-field control cycles with FGC • … • Verifications: • System state machine • Control loops performance • Correct data acquisition for post-mortem

  29. POPS commissioning planning • 7- 13 February: POPS with CCC • Requires P80i + FGC + CCC program. • Tests: • CCC cycles • 1-2 days continuous cycling for thermal tests • … • Verifications: • B-field control performance • Converter basic parameters • Full power system • HMI

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