3rd Workshop on Power Converters for Particle Accelerators

Name: 3rd Workshop on Power Converters for Particle Accelerators
Start: 2012-05-21T08:00:00+02:00
End: 2012-05-23T14:50:00+02:00
Location: DESY

21 May 2012, 08:00 → 23 May 2012, 14:50 Europe/Zurich

Building 1b, room 4b (DESY)

Building 1b, room 4b

DESY

Hans-Joerg Eckoldt (DESY)

Description

Power Converters are critical components in the performance and the operation of Particle Accelerators. Meetings - scheduled or informally organised - during International Conferences either on Particle Accelerators or Power Electronics are not the best way for exchanging experiences and ideas. POCPA Workshop devoted to the specific field of Power Converters for Particle Accelerators aimed to group specialists in this field from the particle accelerator laboratories worldwide for a two-days meeting and to organise a true round-table on selected topics.

Participants

49 View full list

Monday 21 May
- Arrival at DESY Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Lunch Building 9a
  
  Building 9a
  
  DESY
- 1
  Welcome & Introduction Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
  
  Speakers: Hans-Joerg Eckoldt (DESY), Jean-Paul Burnet (CERN), Roberto Visintini (Sincrotrone Trieste)
  Slides
  
  POCPA3_RV_Intro.pdf
  
  POCPA3_RV_Intro.pptx
  
  Startsession.pdf
  
  Startsession.pptx
- 2
  
  DLS Digital Controller Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Tony Dobbing (Diamond Light Source)
  
  Slides
- 3
  
  Digital Regulation of FERMI Power Supplies Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Denis Molaro (Sincrotrone Trieste)
  
  Slides
- 4
  
  Petra III Extension Digital Regulation Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Niels Heidbrook (DESY)
  
  Slides
- Coffee Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 5
  
  Perfomance Improvement of the APS Booster Ring Dipole Magnet Power Supplies Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Ju Wang (Argonne National Laboratory)
  
  Slides
- 6
  
  Magnet Power Supplies for SwissFEL Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Rene Kuenzi
  
  Slides
- 7
  
  eRHIC Project Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Bob Lambiase (Brookhaven Nat'l Lab)
  
  Slides
- 8
  
  Open discussion Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Accommodation Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Official Dinner: Groeninger Privatbrauerei Hamburg
  
  Hamburg
  
  Groeninger Privatbrauerei
  
  Willy-Brandt-Straße 47
  20457 Hamburg
  phone: 040 - 570105-100
  fax: 040 - 570105-498
  
  http://www.groeninger-hamburg.de
Tuesday 22 May
- Coffee: Morning coffee Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 9
  
  Current Measurement: Transducers, Analogue Signal Conditioning and ADCs Building 1b, room 4b
  
  Building 1b, room 4b
  
  Review of current measurement devices Signal cabling Analogue anti-aliasing Signal conditioning Voltage references, network resistors and op-amps Temperature coefficients and compensation Powering of analogue components ADC choices (SAR/ΔΣ)
  
  Speaker: Miguel Cerqueira Bastos (CERN)
  
  Slides
- Questions
- 10
  
  Introduction to Z-transforms Building 1b, room 4b
  
  Building 1b, room 4b
  
  Z-transform is an indispensable mathematical tool for the design and analysis of discrete-time systems. It is the discrete-time counter-part of the Laplace transform. The tutorial begins with the derivation of the Z-transform from the Laplace transform of a discrete-time signal. The main properties of the Z-transform are then listed. A useful aspect of the Laplace and the z-transforms is the representation of a system in terms of the location of the roots of the system transfer function in a complex plane. The correspondence between both planes is presented. The different ways to calculate the z-transfer function of a digitally controlled continuous-time transfer function are then listed. The poles and zeros of the resulting closed-loop transfer function provide useful insight into the system behavior and stability. The influence of the transfer function roots is detailed. The tutorial finishes with a quick description of the two ways to design a digital controller: emulation design and direct discrete-time design.
  
  Speaker: Francois Bouvet (SYNCHROTRON SOLEIL)
  
  Slides
- Questions Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 11
  
  Current Measurement: Digital Filtering Techniques Building 1b, room 4b
  
  Building 1b, room 4b
  
  The basics of quantization and sampling theory will be quickly reviewed and the digital filter problem introduced with emphasis on the specific requirements of measurement within digital control loops. Design guidelines will then be outlined and tools for filter coefficients calculation presented also by means of interactive sessions. The main focus of the tutorial will be on the most commonly used, though computationally demanding, FIR filters for Σ-Δ ADC. A case study will also be detailed in order to present critical issues. Finally guidelines for IIR filters coding on DSP will be presented.
  
  Speaker: Michele Martino (CERN)
  
  Slides
- Questions Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 12
  
  Digital Regulation by Emulating Analogue Controllers: Basic Power Supply Control Building 1b, room 4b
  
  Building 1b, room 4b
  
  The Proportional-Integral controller is our control method of choice for most powers upplies. It attains reasonable performance and can be tuned manually. This talk intends to show the few key components of the control structure, show the limitations of PI control and the differences between the time-continous and time-discrete implementation.
  
  Speaker: Hans Jaeckle (PSI)
  
  Slides
- Questions Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Coffee Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 13
  
  Digital Regulation by Emulating Analogue Controllers: Implementation Building 1b, room 4b
  
  Building 1b, room 4b
  
  Less ADCs than order of the system -> Passive damping is better than getting stability by means of the regulation. Input: Constant Load Current -> constant input power -> negative input resistance of the power supply -> ringing on the intermediate DC power bus -> introduction of passive damping on the input Output: Oscillation of the output filter and the load -> passive damping on the output Delta-Sigma-ADCs -> static precision is ‘no problem’ -> AC precision is today’s problem -> mains synchronous ripple suppression (i.e. 50Hz, 300Hz, 600Hz) -> prefilters -> arbitrary pre-oscillator ADC values -> Add a standard header to the ADC values to create standard audio files -> Use standard audio freeware for wave and frequency analysis
  
  Speaker: Niels Heidbrook (DESY)
  
  Slides
- Questions Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 14
  
  Digital Regulation Using the RST Algorithm: Theory Building 1b, room 4b
  
  Building 1b, room 4b
  
  RST controllers are referred to as polynomial controllers for the way they are calculated using polynomial algebra. Beside this unusual (for PI accustomed control Engineers) characteristic, RST controllers allow the implementation of digital controls of any degree of complexity. In this tutorial we will explore some of the features of the RST control structure and will see it at work in the control of the new 60MW main power converter for the CERN proton synchrotron (POPS).
  
  Speaker: Fulvio Boattini (CERN)
  
  MatlabSoftware
  
  Slides
- Questions Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 15
  
  Digital Regulation Using the RST Algorithm: Implementation Building 1b, room 4b
  
  Building 1b, room 4b
  
  The converter controls for the LHC power converters was successfully based on the RST algorithm. The software included the code to calculate the RST coefficients to create a PII controller on an inductive load. In 2008 the same RST implementation was used to control the field in the PS main circuit using RST coefficients calculated using MATLAB. In 2010 the RST algorithm was extracted and refactored into a C software library that is now available under the LGPL. A test program call cctest was written under Linux to test libreg and libfg (function generation) and it provides a template for a real-time controller based on the RST algorithm. Libreg supports reference and measurement limits checking, magnet saturation compensation, current and field regulation, and voltage source and load simulation. The tutorial will present the implementation of a complete RST based converter regulation program and will show how cctest can be used to simulate regulation and as a template for the development of a controller.
  
  Speaker: Mr Quentin King (CERN)
  
  Exercise worksheet
  
  Slides
  
  Software download
- Lunch Building 9a
  
  Building 9a
  
  DESY
- 16
  
  Power Supplies Activities at Soleil Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Francois Bouvet (SYNCHROTRON SOLEIL)
  
  Slides
- 17
  
  Booster Magnets Power Supplies Refurbishing: Next Steps Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Marco Cautero
  
  Slides
- 18
  
  Power Converter System at the CLS Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Bud Fogal
  
  Slides
- 19
  
  Powering of FRIB Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Kent Holland
  
  Slides
- 20
  
  Open Discussion Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Coffee Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Visit to DESY Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Accommodation Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- Informal Dinner Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
Wednesday 23 May
- 21
  
  XFEL Digital Regulation, Analog Regulation Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Bjoern Naeser
- 22
  
  The CRB Project for MedAustron Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Kristian Ambrosch (MedAustron)
  
  Slides
- 23
  
  Power Converters at IHEP-2 Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Qi XIN
  
  Slides
- 24
  
  Power Converters at IHEP-1 Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Xialing Guo
  
  Slides
- Coffee Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
- 25
  
  Power Converter Activities at the Australian Synchrotron Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Mr Sean Murphy
  
  Slides
- 26
  
  Status of ALBA Power Supplies Building 1b, room 4b
  
  Building 1b, room 4b
  
  Speaker: Roberto Petrocelli (ALBA-CELLS)
  
  Slides
- Conclusions & Proposals Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY
  
  slides
- Lunch Building 9a
  
  Building 9a
  
  DESY
- Departure from DESY Building 1b, room 4b
  
  Building 1b, room 4b
  
  DESY

3rd Workshop on Power Converters for Particle Accelerators

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Building 9a

DESY

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Hamburg

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 9a

DESY

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 1b, room 4b

Building 1b, room 4b

Building 1b, room 4b

DESY

Building 9a

DESY

Building 1b, room 4b

DESY