3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

PETRAIII Extension digital regulation

•Constant current oscillations•AC load

•Number of Power supplies•Pictures of power parts

Niels HeidbrookDESY

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Petra III

2,3km length

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

201269

223

91

102

2039 8

69 Correctors 60V/15A

223 Correctors 40V/30A

91 Bipolar Choppers 55A

102 Choppers 200A

20 Choppers 2*400A

39 Choppers 600A

8 Thyristor 500V/500A

252 choppers

556 power supplies

292 correctors

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

2

40

30

27 2 Correctors 60V/15A

40 Correctors 40V/30A

30 Choppers 200A

27 Choppers 600A

309 choppers 334 correctors

Petra III Extension

655 power supplies old

Petra III Extension

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

334 Correctors

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

91 Bipolar Choppers 55A

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

132 Choppers 200A

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

20 Choppers 2*400A

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

66 Choppers 600A

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

71

263

91

132

20

66 871 Correctors 60V/15A

263 Correctors 40V/30A

91 Bipolar Choppers 55A

132 Choppers 200A

20 Choppers 2*400A

66 Choppers 600A

8 Thyristor 500V/500A

8 Thyristor 500V/500A

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

SD card

USB, COM 1&2, CAN BUS

DCCT 1&2

•Polarity changer•Fan steering

CAN BUS

Temperature measurement

Touchscreen display with scope

FPGA 1•Current Measurement•I-Regulator•Communication

Internet Chip•Communication•Online scope•Mail

Power partEthernet PSC

Control systemWeb page Scope

Service box

1ADC/6DAC/6digital I/O

Touchscreen display

Fiber optics

FPGA 2•Voltage Measurement•U-Regulator•Power part steering and protection•Main contactor steering•Ground resistance measurement•Dump survey

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

Mains

=

~ Power supplies

Rectifier filterconstant current =>

constant power

Uintermediate

Iload

Iintermediate

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

Mains

=

~ Constant power loads

Rectifier filter

Uintermediate

Iintermediate

t

Iintermediate

Uintermediate

I1=1A

U1=10VI0=2A

U0=5VP=10W

∆R=∆U

∆I=

10V-5V

2A-1A

-5V

1A== -5Ω

P

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

IR2

IR2

constant power5KW

filter

rectifier power supplies

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

~350Aeff

IR2

IR2

constant power55KW

filter

rectifier power supplies

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

IR2

IR2

constant power55KW

filter

rectifier power supplies

damping

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

Mains

=

~ Power supplies

Rectifier filterconstant current =>

constant power

Uintermediate

Iload

Iintermediate

damping

Conclusion:

Extension => check damping

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

Mains

=

~ Power supplies

Rectifier filter

Uintermediate

Iload

Iintermediate

filter

C

L

Lload

L, C, Lload => system order is 3

Uload

Uload, Iload => 2 values for regulation

Regulation is under-determined for full pole setting Ringing problems => less regulation quality

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Constant current oscillations

Mains

=

~ Power supplies

Rectifier filter

Uintermediate

Iload

Iintermediate

damping

filter

C

L

Lload

damping

Stability at high current, Improved regulation quality

Resistance of a self-repairing (POLYSWITCH) fuse

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

AC load

Power supply

Iload

filter

C

LSCR bridge

12 pulseUSCR

f0=600Hz

ISCR ~ constant

U1

U2

U3

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Power supply

Iload

C

L

delay

U=4Vpp

f0=600Hz~

(Iload Delta-Sigma ADC delay = 1ms)

AC load

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

filter

C

L

U=4Vpp

f0=600Hz

delay

~reaction ~

Iload

AC load

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Iload

filter

C

L

U=4Vpp

f0=600Hz

pre-delay

~pre-action ~U=4Vpp

f0=600Hz

action

AC load

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012

Iload

U=4Vpp

f0=600Hz~ ~

U=4Vpp

f0=600Hz

Power supply =

Frequency generator

600Hz @ 4Vpp => High internal filter current

AC load

The MTBF is satisfying, i.e. limited by:Auxiliary power supplies fail sometimes 12V/4A (1.2A load)There are still some software bugs Overcurrent after cycling of the magnets caused by the old learning function

About 3.5 Years experience556 new designed power supplies in operation

655 power supplies including the Extension

Conclusion

3rd Workshop on Power Converters for Particle Accelerators (POCPA)

2012