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A Control Strategy for Inverter Type High Voltage Power Supply for NBI

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Abstract

An inverter type high voltage power supply has been designed for the acceleration of ITER NBI system. This type of power supply can regulate the output voltage rapidly by the duty cycle modulation of the inverter switches. However, when the duty cycle is too small, the output ripple will be lager. This paper studies a new control strategy of the power supply, the output voltage is regulated by inverter duty cycle, also by adjusting the DC-link voltage. The front rectifier of this power supply is constructed by thyristor bridges, while the inverter is a three phase three level inverter. Control system for this power supply is designed in this paper. Simulation results is given, and the results demonstrate that the topology and control strategy can limit the voltage ripple while maintain the rapid voltage response.

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Acknowledgments

This work is supported by the National ITER Project of China, No. 2013GB113003 and No. 2010GB108001.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China

    Ming Zhang, Linglong Xia, Xueliang Zhang, Chuliang Wang & Ge Zhuang

Authors
  1. Ming Zhang
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  2. Linglong Xia
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  3. Xueliang Zhang
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  4. Chuliang Wang
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  5. Ge Zhuang
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Correspondence to Ming Zhang.

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Zhang, M., Xia, L., Zhang, X. et al. A Control Strategy for Inverter Type High Voltage Power Supply for NBI. J Fusion Energ 34, 361–364 (2015). https://doi.org/10.1007/s10894-014-9778-2

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  • DOI: https://doi.org/10.1007/s10894-014-9778-2

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