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

The Korean Institute of Power Electronics (전력전자학회)
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Bi-directional Photovoltaic Inverter with High Efficiency and Low Noise

고 효율, 저 잡음 특성을 가지는 양방향 태양광 인버터

  • Lee, Sung-Ho (Div. of Electric. Electron. Eng., Pohang Univ. of science and technology) ;
  • Kwon, Jung-Min (Dept. of Electric. Eng., Hanbat National University) ;
  • Kwon, Bong-Hwan (Division of Electric. Electron. Eng., Pohang Univ. of science and technology)
  • Received : 2012.07.31
  • Accepted : 2012.10.22
  • Published : 2012.12.20
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Abstract

Due to merits cost and efficiency, the transformer-less type photovoltaic (PV) inverters have been popularized in the solar market. However, the leakage current flowing through a parasitic capacitor between PV array and ground can cause adverse effect in the transformer-less PV system. In this paper, a bi-directional PV inverter with high efficiency and low noise is proposed for the PV system with an energy storage device. The proposed inverter is a transformer-less type and performs the bi-directional power control between dc sources and grid with high efficiency. In addition, the proposed inverter can suppress the leakage current and obtain low noise characteristic. Finally, 3-kW prototype was implemented to confirm validity of the proposed inverter.

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References

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