Dyna-C: A Minimal Topology for Bidirectional Solid-State Transformers

作者：Chen Hao^*; Prasai Anish; Divan Deepak

来源：IEEE Transactions on Power Electronics, 2017, 32(2): 995-1005.

DOI：10.1109/TPEL.2016.2547983

• Bidirectional power control
• DC
• dynamic current
• high-frequency isolation
• multiterminal
• single-phase ac
• solid-state transformer
• three-phase ac

This paper presents a topology for bidirectional solid-state transformers with a minimal device count. The topology, referenced as dynamic-current or Dyna-C, has two current-source inverter stages with a high-frequency galvanic isolation, requiring 12 switches for four-quadrant three-phase ac/ac power conversion. The topology has voltage step-up/down capability, and the input and output can have arbitrary power factors and frequencies. Further, the Dyna-C can be configured as isolated power converters for single-or multiterminal dc, and single-or multiphase ac systems. The modular nature of the Dyna-C lends itself to be connected in series and/or parallel for high-voltage high-power applications. The proposed converter topology can find a broad range of applications such as isolated battery chargers, uninterruptible power supplies, renewable energy integration, smart grid, and power conversion for space-critical applications including aviation, locomotives, and ships. This paper outlines various configurations of the Dyna-C, as well as the relative operation and controls. The converter functionality is validated through simulations and experimental measurements of a 50-kVA prototype.

• 出版日期2017-2