POPSB - MPS / Main Power Supply |
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RPOPB | GENERAL ELECTRIC |
Power In | 3 ~ 18KV/1950V 2.5MVA |
Power Out | 5.6KA/3050V |
Converter Type | Capacitive Storage |
Control type | General electric Control + FGC3 |
1st Intervention | ![]() |
Responsibles: | Fulvio BOATTINI |
Arnaud BESSONNAT | |
Aramis SCHWANKA TREVISAN |
POPSB supplies the PSB magnets without drawing all the power from the network. A storage capacitor bank connected on the DC side provide power decoupling from the network. The storage capacitance is around 0.3F (@5kV Udc nominal)
This exchange of energy between the capacitor banks and the load is controlled by a DC/DC converter. The system is connected to the electrical network by a AC/DC converter (Active Front End). This converter charges the capacitor banks and supplies the losses of the load and of the converters.
Dipole and quadrupole magnets of the PSB accelerator are grouped in two independent series (“Magnet string 1&4” and “Magnet string 2&3” in Figure 2) each one powered by one POPSB.MPS power converter.
In total there are three POPSB.MPS power converters:
The three POPSB.MPS power converters are identical.
POPSB.MPS converter architecture
Power In | 3 ~ 18KV/1950V 2.5MVA |
Power Out | 6KA peak,3KA rms/3KV |
Cooling type | Demineralized water |
The POPSB.MPS power converter is composed of an AC/DC (AFE) units which supply power to a DC/DC power converter. The capacitor banks are used to exchange the energy with the PSB magnets during converter pulsing operation.
POPSB power converter schematic diagram
As the current in the magnets rises, the voltage across storage capacitors drops. The energy stored in the magnets is then given back to capacitors at the end of the cycle. In this way the AFE converter provides only the losses required by the magnets and the converter itself.
POPSB Magnet current & voltage
POPSB Power balance
POPSB power converter schematic block diagram
POPSB control functional diagram
POPSB control scheme
The supervision application has been developed at CERN using the technologie WinCC-OA-UNICOS.Many views were developed for the operation and diagnostic: detail view on the AC/DC, DC/DC, capacitors banks, interlocks, etc.POPSB HMI view
PSB WIC supervision
POPSB Circuit connection
Dipole magnet.
BHZ Main magnet characteristics.
QDE Quadrupole magnet.
QFO magnet parameters.
QDE magnet parameters.
The POPSB equipements are installed inside the building 245:
POPSB 245 Layout