The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A Study on a Current Control Based on Model Prediction for AC Electric Railway Inbalance Compensation Device

교류전력 불평형 보상장치용 모델예측기반 전류제어 연구

  • Lee, Jeonghyeon (Dept. of Electrical Engineering, Chungnam National University) ;
  • Jo, Jongmin (Dept. of Electrical Engineering, Chungnam National University) ;
  • Shin, Changhoon (Dept. of Electrical Engineering, Chungnam National University) ;
  • Lee, Taehoon (Railroad Research Institute, KORAIL) ;
  • Cha, Hanju (Dept. of Electrical Engineering, Chungnam National University)
  • Received : 2020.08.27
  • Accepted : 2020.10.06
  • Published : 2020.12.20
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Abstract

The power loss of large-capacity systems using single-phase inverters has attracted considerable attention. In this study, optimal switching sequence model prediction control at a low switching frequency is proposed to reduce the power loss in a high-power inverter system, and a compensation method that can be utilized for model prediction control is developed to reduce errors in accordance with sampling values. When a three-level, single-phase inverter using a switching frequency of 600 Hz and a sampling frequency of 12 kHz is adopted, the power factor is improved from 0.95 to 0.99 through 3 kW active power control. The performance of the controller is also verified.

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References

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