The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Small-Signal Modeling and Controller Design of Grid-Connected Inverter for Solid State Transformer

반도체 변압기용 단상 계통 연계형 인버터의 소신호 모델링과 제어기 설계

  • Kim, Bo-Gyeong (School of Electrical and Computer Engineering, UNIST) ;
  • Lee, Jun-Young (School of Electrical and Computer Engineering, UNIST) ;
  • Lee, Soon-Sinl (School of Electrical and Computer Engineering, UNIST) ;
  • Jung, Jee-Hoon (School of Electrical and Computer Engineering, UNIST)
  • Received : 2016.03.30
  • Accepted : 2016.12.26
  • Published : 2017.01.01
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Abstract

In this paper, a small signal model for grid-connected inverter with unipolar pulse width modulation method is presented. Small-signal analysis allows to predict the stability and dynamics of the inverter. To regulate output voltage and to achieve power factor correction, inverter has two control loops. Loop gains are useful to identify the stability for multi-loop controlled system. Based on small-signal model, controllers are designed to improve audio susceptibility and output impedance characteristics. Proposed small-signal model and controllers are verified by PSIM simulation and experiments.

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References

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