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Sliding mode control of solid state transformer using a three-level hysteresis function

  • Mechanical Engineering, Control Science and Information Engineering
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Abstract

The solid state transformer (SST) can be viewed as an energy router in energy internet. This work presents sliding mode control (SMC) to improve dynamic state and steady state performance of a three-stage (rectifier stage, isolated stage and inverter stage) SST for energy internet. SMC with three-level hysteresis sliding functions is presented to control the input current of rectifier stage and output voltage of inverter stage to improve the robustness under external disturbance and parametric uncertainties and reduce the switching frequency. A modified feedback linearization technique using isolated stage simplified model is presented to achieve satisfactory regulation of output voltage of the isolated stage. The system is tested for steady state operation, reactive power control, dynamic load change and voltage sag simulations, respectively. The switching model of SST is implemented in Matlab/ Simulink to verify the SST control algorithms.

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Authors and Affiliations

  1. College of Information System and Management, National University of Defense Technology, Changsha, 410073, China

    Bao-long Liu  (刘宝龙), Ya-bing Zha  (査亚兵) & Tao Zhang  (张涛)

  2. State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha, 410073, China

    Ya-bing Zha  (査亚兵) & Tao Zhang  (张涛)

Authors
  1. Bao-long Liu  (刘宝龙)
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  2. Ya-bing Zha  (査亚兵)
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  3. Tao Zhang  (张涛)
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Corresponding author

Correspondence to Bao-long Liu  (刘宝龙).

Additional information

Foundation item: Projects(61403404, 71571187) supported by the National Natural Science Foundation of China

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Liu, Bl., Zha, Yb. & Zhang, T. Sliding mode control of solid state transformer using a three-level hysteresis function. J. Cent. South Univ. 23, 2063–2074 (2016). https://doi.org/10.1007/s11771-016-3262-2

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  • DOI: https://doi.org/10.1007/s11771-016-3262-2

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