A complete set of experimental tests on a novel conversion scheme for three-phase grid-connected photovoltaic (PV) generation systems is presented in this paper. The proposed scheme is based on two insulated strings of PV panels, each one feeding a standard two-level three-phase voltage source inverter (VSI). The inverters are connected to grid by a three-phase transformer with the open winding configuration on inverters side. The resulting conversion structure acts as a multilevel converter, doubling the power capability of a single VSI with given current rating. An original control method has been introduced to regulate the dc-link voltages of each VSI, allowing the wholeconverter to inject the PV energy into the grid and to perform as a power active filter.
G. Grandi, D. Ostojic, C. Rossi (2008). Experimental Tests on a Multilevel Converter for Grid-Connected Photovoltaic Systems. ZURICH : Swiss Federal Institute of Technology (ETH).
Experimental Tests on a Multilevel Converter for Grid-Connected Photovoltaic Systems
GRANDI, GABRIELE;ROSSI, CLAUDIO
2008
Abstract
A complete set of experimental tests on a novel conversion scheme for three-phase grid-connected photovoltaic (PV) generation systems is presented in this paper. The proposed scheme is based on two insulated strings of PV panels, each one feeding a standard two-level three-phase voltage source inverter (VSI). The inverters are connected to grid by a three-phase transformer with the open winding configuration on inverters side. The resulting conversion structure acts as a multilevel converter, doubling the power capability of a single VSI with given current rating. An original control method has been introduced to regulate the dc-link voltages of each VSI, allowing the wholeconverter to inject the PV energy into the grid and to perform as a power active filter.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
