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Control Design Guidelines for Single-Phase Grid-Connected Photovoltaic Inverters With Damped Resonant Harmonic Compensators

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5 Author(s)
Castilla, M. ; Dept. of Electron. Eng., Tech. Univ. of Catalonia, Vilanova i la Geltru, Spain ; Miret, J. ; Matas, J. ; Garcia de Vicuna, L.
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The injection of low-harmonic current to the electrical grid is nowadays regulated by international standards. In order to accomplish these standards, selective harmonic compensation is carried out in grid-connected photovoltaic inverters by means of resonant harmonic compensators. This paper gives a systematic design procedure for selecting the gains and parameters of these harmonic compensators. Other factors considered in the design process include frequency deviation, grid synchronization, and transient response. Both a design example meeting the requirements of grid interconnection and selected experimental results from a digital-signal-processor-based laboratory prototype are also reported.

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Industrial Electronics, IEEE Transactions on  (Volume:56 ,  Issue: 11 )