Power Triggering

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					LBDS




            Power Triggering


       Etienne CARLIER & Jean-Louis BRETIN
                    AB/BT/EC
 LBDS
                                           Outline

• Architecture
• Power Trigger Unit
     – Block diagram
     – Characteristics
• Power Trigger Module
     – Circuit
     – Signals
• Protection
• Power Trigger Controller
     – State
     – Signals
• Re-triggering

Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                 Trigger Synchronisation & Distribution
                                             Architecture
                    Trigger        Trigger          Power                         Re-trigger
                Synchronisation    Fan-out          Trigger                         Box
                     Unit                            Unit     Generator 1

                      TSU           TFO              PTU         Branch             RTB
                                                                   A


                                                     PTU         Branch             RTB
                                                                   B

               Frev
                                                              Generator 15
   Client             TSU           TFO              PTU         Branch             RTB
                                                                   A
 Interface
                                                                 Branch             RTB
                                                     PTU           B




                                                                                    RTD

                                                               Re-trigger lines
Fail-safe                Fault-tolerant
Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                 Power Trigger Unit
                                              Block Diagram

               PTU (Power Trigger   Unit)

                                                  PTM (Power Trigger Module)
                                     Power
                                                                   Main
                   Inputs           Supplies
                                                   Driver
                  Trig 1              +5V                     Compensation
                  Trig 2              ±15V
                 Re-Trig 1           +48V         PTM (Power Trigger Module)
                 Re-Trig 2           ±150V
                 Soft Trig          +3000V
                                      3000V                        Main
                                                   Driver
                                                              Compensation

                PTC (Power Trigger Controller)

                                            Controller


Etienne CARLIER, LBDS Audit – 28/01/2007
    LBDS                             Power Trigger Unit
                                           Characteristics

•     Two independent « power » outputs
       – One power output is able to trigger one branch of one generator
       – 2 power outputs can be operated in parallel
•     Single output trigger pulse for principal and compensation circuits
       – Variable voltage for principal circuit (generator turn-on delay compensation)
       – Fixed voltage for compensation circuit
•     5 different trigger inputs
       – 2 redundant normal inputs
       – 2 redundant re-trigger inputs
             ft t i
       – 1 soft trigger
•     Full monitoring via PROFIBUS-DP
       – Static mode     SCSS
       – Pulse mode      IPOC




Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                             Power Trigger Module
                                           Circuit




Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                             Power Trigger Module
                                           Signals

        PRINCIPAL CIRCUIT TRIGGER             COMPENSATION CIRCUIT TRIGGER

   •    Operating range: 600 V to 3 kV        •   Operating voltage: -150 V
   •    Maximum output current 275 A          •   Mean output current: 75 A
   •        µ pulse duration
        2.5 µs p                              •                        µ
                                                  Pulse duration > 400 µs
   •    No turn-on jitter




Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                  Triggering Circuit
                                            Protection

  HV Diode to protect
  redundant PTM in case of
  short-circuit at the output
  of the other module


                                                           Main Switch
        PTM

        PTM


            Tri-axial cable for EMC
            protection
                                                           Compensation Switch
                                                         Single triggering transformer for
                                Trigger HV Transformer   p     p           p
                                                         principal and compensation circuit
                                                            no incoherent kick

Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                      Monitoring
                                           State Diagram

                STATIC MODE                                PULSE MODE



                      FAULTY                                  READY




                                                    Arm                 Trigger



                                                     DATA              DATA
                        OK
                                                     VALID            CHECK




Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                      Monitoring
                                             Signals

               STATIC MODE                                PULSE MODE
   •    State                                   •   Trigger inputs
   •    High voltage                                 – Trig IN1 & IN2
         – Control                                     Re Trig
                                                     – Re-Trig IN1 & IN2
         – Status                                    – Soft Trigger
   •    Low voltage                             •   Driver circuits
         – +15V                                      – PTMA & PTMB
         – +48V                                 •   Re-trigger box inputs
         – +150V                                •   Output pulse waveform
   •    Watchdog status                             analysis
   •    Soft-trigger status                          – Primary voltage
                                                     – Primary current
                                                     – Secondary current



Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS
                                           Pictures
           Power Trigger Unit                 Power Trigger Module




           Power Trigger Controller           Power Supplies




Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                 Trigger Synchronisation & Distribution
                                             Architecture
                    Trigger        Trigger          Power                         Re-trigger
                Synchronisation    Fan-out          Trigger                         Box
                     Unit                            Unit     Generator 1

                      TSU           TFO              PTU         Branch             RTB
                                                                   A


                                                     PTU         Branch             RTB
                                                                   B

               Frev
                                                              Generator 15
   Client             TSU           TFO              PTU         Branch             RTB
                                                                   A
 Interface
                                                                 Branch             RTB
                                                     PTU           B




                                                                                    RTD

                                                               Re-trigger lines
Fail-safe                Fault-tolerant
Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                      Re-Triggering
                                                  Sensors




                                              I
              V
                           I




                                              I
              V

                            I                               Re-trigger Line A
I : Current
V: Voltage                                                  Re-trigger
                                                            Re trigger Line B

Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                 Re-triggering Box
                                           Principle


                                      From Sensors




                               To Power Trigger Unit
Etienne CARLIER, LBDS Audit – 28/01/2007
    LBDS                                   Re-Triggering
                                            Characteristics

•     Fully passive fault tolerant system
                  post mortem
       – Complete post-mortem analysis after each dump action
•     All the power needed to re-trigger the complete extraction kicker system
      is available directly from the sensors
                 pick-ups
       – Current pick ups
       – High voltage dividers
•     Re-trigger delay is due to
       –   Detection time
       –   Propagation time over the 14 remaining generators
       –   Power trigger turn on delay
       –   Main switch turn on delay




Etienne CARLIER, LBDS Audit – 28/01/2007
 LBDS                                      Re-triggering
                                              Hardware




                        Re-Trigger Box



Etienne CARLIER, LBDS Audit – 28/01/2007

				
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posted:12/5/2011
language:French
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