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Power Injection System for Grid-Connected Photovoltaic Generation Systems Based on Two Collaborative Voltage Source Inverters

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4 Author(s)
Romero-Cadaval, E. ; Power Electr. & Electron. Syst. Res. Group, Univ. of Extremadura, Badajoz, Spain ; Milanes-Montero, M.I. ; Gonzalez-Romera, E. ; Barrero-González, F.

This paper presents a new topology for the power injection system that is based on the parallel association of two voltage source inverters. One operates using a quasi-square voltage waveform strategy, and the other operates with a pulsewidth-modulation (PWM)-based strategy. The aims of this topology are to inject the power from the photovoltaic generation system using the quasi-square inverter and to control the current quality using the PWM inverter. The proposal optimizes the system design, permitting the reduction of system losses and an increase of the energy injected into the grid.

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