Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Maximum Power Point Tracking Controller Connecting PV System to Grid

  • Ahmed G. Abo-Khalil (Dept. of Electrical. Eng., Yeungnam University) ;
  • Lee Dong-Choon (Dept. of Electrical. Eng., Yeungnam University) ;
  • Choi Jong-Woo (School of Electrical Eng. and Computer Science, Kyungpook National University) ;
  • Kim Heung-Geun (School of Electrical Eng. and Computer Science, Kyungpook National University)
  • Published : 2006.07.01
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Abstract

Photovoltaic (PV) generators have nonlinear V-I characteristics and maximum power points which vary with illumination level and temperature. Using a maximum power point tracker (MPPT) with an intermediate converter can increase the system efficiency by matching the PV systems to the load. This paper presents a maximum power point tracker based on fuzzy logic and a control scheme for a single-phase inverter connected to the utility grid. The fuzzy logic controller (FLC) provides an adaptive nature for system performance. Also the FLC provides excellent features such as fast response, good performance and the ability to change the fuzzy parameters to improve the control system. A single-phase AC-DC inverter is used to connect the PV system to the grid utility and local loads. While a control scheme is implemented to inject the PV output power to the utility grid at unity power factor and reduced harmonic level. The simulation results have shown the effectiveness of the proposed scheme.

Keywords

References

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