1 / 11

SPS Partial Economy

SPS Partial Economy. J. Wenninger BE-OP-SPS April 2009. The partial economy team: S. Page, M. Jonker, S. Cetour Cave, L. Pereira, J.C. Bau, I. Kozsar, E. Carlier. What is the aim partial economy?.

materia-perrin
Download Presentation

SPS Partial Economy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SPS Partial Economy J. Wenninger BE-OP-SPS April 2009 The partial economy team: S. Page, M. Jonker, S. Cetour Cave, L. Pereira, J.C. Bau, I. Kozsar, E. Carlier

  2. What is the aim partial economy? Switch dynamically from a nominal to a reduced pulse on SFT cycles (for the moment) in the absence of beam after the first injection to save power.

  3. EDF Energy Prices • Cost of 1 minute of SPS running (summer): • SPS main dipoles at their limit of 39 MW : 13 Euro. • SPS total consumption of ~ 80 MV : 26 Euro. During FT period ~ 20 Euro/MWh

  4. SPS power consumption When we switch to partial economy we save ~230 kWh, i.e ~ 5 Euro/cycle. Note : total SPS consumption ~ 80 MW

  5. SPS partial economy event flow t = inj. + 100 ms t = inj. + 200 ms SIS 1 Set SW interlock CIB.BA1.S1 3 BIC 4 2 SX.APECO 5 Emergency Dump SPS Mains Trigger emergency dump 7 Switch to economy 6

  6. SIS economy tree SIS triggers economy mode when SPS_ECONOMY_MODE = RED = FALSE

  7. SIS economy conditions • The SIS tree involves 4 tests that are OR-ed: • Test 1 : TRUE if the BCT intensity is larger than 5 x10^10 p. • Test 2 : TRUE if the BCT acquisition time field is larger than 150 ms (wrt first injection). • Test 3 : TRUE if the main dipoles are NOT pulsing. • Test 4 : TRUE if the main quadrupoles are NOT pulsing. • All 4 conditions must be FALSE to go to economy, i.e.: • The BCT intensity is smaller than 5 x10^10 p. • The BCT acquisition time is less than 150 ms (wrt first injection). • The main dipoles are pulsing. • The main quadrupoles are pulsing. • The conditions are evaluated 400 ms after the start of the SFT cycle (200 ms after injection). If SIS decides to switch to economy it: • Sends a SW interlock to the BIC in BA1, waits 10 ms, resets the SW interlock. • Triggers the LTIM which in turn triggers the economy event generation.

  8. Protections • If any data is missing  NO ECONOMY. • SIS triggers economy only on SFT* cycles. • Delay protections: • The ROCS system does not accept a economy request after 1200 ms. • The economy event can only be triggered: • During the first BP (1.2 s) of a cycle – in place. • From the two SPS SIS servers and one test server. • Due to the fact that SIS is based on JAVA and that JAVA is not ‘real-time’, there is no guarantee on the time when the actions are triggered. • We have observed additional delays of up to ~800 ms due to the JAVA Garbage Collectors (GC) – in the process of being optimized (GC parameters). • There may also be occasional delays due to CMW (set commends). • The timing issues are under investigations.

  9. Diagnostics • SIS tree. • SIS alarm. • XTIM “XTS.APECO-XTIM” can be used to monitor to event SX.APECO  used to log the economy cycles. • SPS ring interlock monitor program was upgraded to monitor the economy and indicate it on the main panel. Economy detected Sw interlock <--> economy

  10. Timing details SW permit to FALSE during economy (ms in the cycle)

  11. Help This presentation can be opened from the help menu.

More Related