A SMES-Based Power Supply for Accelerator Magnets

Gehring, R.; Juengst, K.-P.; Kuperman, G.; Bordry, F.; Burnet, Jean-Paul; Voelker, F.

doi:10.1109/tasc.2006.871330

Cited by 8 publications

(1 citation statement)

References 3 publications

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“…Additionally, the use of super conducting magnetic energy storage has recently been evaluated. 5,6 Recently, a method of compensating the power fluctuation using an energy storage capacitor has been proposed and realized. [7][8][9] Employing this method, during the rising period of the excitation current, energy in the storage capacitor will be delivered to the magnets.…”

Section: Introductionmentioning

confidence: 99%

Capacitive energy storage and recovery for synchrotron magnets

Koseki

2014

Review of Scientific Instruments

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Feasibility studies on capacitive energy storage and recovery in the main-ring synchrotron of the Japan Proton Accelerator Research Complex were conducted by circuit simulation. The estimated load fluctuation was 96 MVA in total for dipole magnets, which is likely to induce a serious disturbance in the main grid. It was found that the energy stored in the magnets after the excitation period can be recovered to the storage capacitor by controlling the voltage across the energy-storage capacitor using a pulse-width-modulation converter and reused in the next operational cycle. It was also found that the power fluctuation in the main grid can be reduced to 12 MVA. An experimental evaluation of an aluminum metalized film capacitor revealed that capacitance loss was induced by a fluctuating voltage applied to the storage capacitor when applying the proposed method. The capacitance loss was induced by corona discharge around the edges of segmented electrodes of a self-healing capacitor. The use of aluminum-zinc alloy was evaluated as a countermeasure to mitigate the effect induced by the corona discharge. For a zinc content of 8%, which was optimized experimentally, a capacitor with a sufficient life time expectancy of 20 years and a working potential gradient of 250 V/μm was developed.

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Section: Introductionmentioning

confidence: 99%