Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Mode Switching Smooth Control of Transient Process of Grid-Connected 400 Hz Solid-State Power Supply System

  • Zhu, Jun-Jie (National Key Laboratory for Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Nie, Zi-Ling (National Key Laboratory for Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Zhang, Yin-Feng (National Key Laboratory for Vessel Integrated Power System Technology, Naval University of Engineering) ;
  • Han, Yi (National Key Laboratory for Vessel Integrated Power System Technology, Naval University of Engineering)
  • Received : 2016.04.09
  • Accepted : 2016.07.11
  • Published : 2016.11.20
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Abstract

The mode-switching control of transient process is important to grid-connected 400 Hz solid-state power supply systems. Therefore, this paper analyzes the principle of on-grid and islanding operation of the system with or without local loads in the grid-connected process and provides a theoretical study of the effect of different switching sequences on the mode-switching transient process. The conclusion is that the mode switch (MS) must be turned on before the solid-state switch (STS) in the on-grid process and that STS must be turned off before the MS in the off-grid process. A strategy of mode-switching smooth control for transient process of the system is proposed, including its concrete steps. The strategy utilizes the average distribution of peak currents and the smooth adjustment of peak currents and phases to achieve a no-shock grid connection. The simulation and experimental results show that the theoretical analysis is correct and that the method is effective.

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References

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