Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Sliding Mode Controller Applied to Coupled Inductor Dual Boost Inverters

  • Fang, Yu (College of Information Engineering, Yangzhou University) ;
  • Cao, Songyin (College of Information Engineering, Yangzhou University) ;
  • Wheeler, Pat (Department of Electrical and Electronic Engineering, University of Nottingham)
  • Received : 2019.04.14
  • Accepted : 2019.06.27
  • Published : 2019.11.20
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Abstract

A coupled inductor-dual boost-inverter (CIDBI) with a differential structure has been presented for application to a micro-inverter photovoltaic module system due to its turn ratio of a high-voltage level. However, it is difficult to design a CIDBI converter with a conventional PI regulator to be stable and achieve good dynamic performance, given the fact that it is a high order system. In view of this situation, a sliding mode control (SMC) strategy is introduced in this paper, and two different sliding mode controllers (SMCs) are proposed and adopted in the left and right side of two Boost sub-circuits to implement the corresponding regulation of the voltage and current. The schemes of the SMCs have been elaborated in this paper including the establishment of a system variable structure model, selection of the sliding surface, determination of the control law, and presentation of the reaching conditions and sliding domain. Finally, the mathematic analysis and the proposed SMC are verified by experimental results.

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