電圧形に切替え可能な系統連系用電流形インバータ

書誌事項

タイトル別名
  • Inverter for Interchangeable Use as Current Source Inverter and Voltage Source Inverter for Interconnecting to Grid
  • デンアツケイ ニ キリカエ カノウ ナ ケイトウレンケイヨウ デンリュウガタ インバータ

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抄録

We propose a novel inverter that can be operated either as a Current Source Inverter (CSI) or as a Voltage Source Inverter (VSI) by changing only the control signals. It is proper to apply it to the interconnecting system with renewal energy, such as photovoltaic cells or wind generation systems, to a grid. This inverter is usually operated as the CSI connected to the grid. Even if the energy source has a lower voltage than the grid, the energy can be supplied to the grid through the proposed inverter. The power factor can be briefly maintained at almost unity. When power supply from the grid is interrupted, the proposed circuit should be operated as the VSI in the stand-alone operation mode. In this way, the circuit can maintain a constant output voltage to the loads. In this paper, the proposed circuit configuration and the control schemes for both the CSI and the VSI are described. Further, the circuit characteristics for both are discussed experimentally.

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