Application of wavelet-based active power filter in accelerator magnet power supply

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GUO Xiao-Ling and CHENG Jian. Application of wavelet-based active power filter in accelerator magnet power supply[J]. Chinese Physics C, 2014, 38(11): 117007. doi: 10.1088/1674-1137/38/11/117007
GUO Xiao-Ling and CHENG Jian. Application of wavelet-based active power filter in accelerator magnet power supply[J]. Chinese Physics C, 2014, 38(11): 117007.  doi: 10.1088/1674-1137/38/11/117007 shu
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Received: 2013-12-20
Revised: 1900-01-01
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Application of wavelet-based active power filter in accelerator magnet power supply

    Corresponding author: GUO Xiao-Ling,
    Corresponding author: CHENG Jian,

Abstract: Since modern accelerators demand excellent stability to magnet power supply (PS), it is necessary to decrease harmonic currents passing magnets. Aiming at depressing the rappel current from the PS in the Beijing electron-positron collider Ⅱ, a wavelet-based active power filter (APF) is proposed in this paper. An APF is an effective device to improve the quality of currents. As a countermeasure to these harmonic currents, the APF circuit generates a harmonic current, countervailing harmonic current from PS. An active power filter based on wavelet transformation is proposed. Discrete wavelet transformation is used to analyze the harmonic components in the supply current, and an active power filter circuit works according to the analysis results. Our simulation and experiment results are given to prove the effect of the APF.

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