This paper proposes a nine-level PWM gridconnected photovoltaic inverter for single-phase applications. The basic structure relies on two cascaded full-bridges supplied with different voltage levels. A flying capacitor provides the power supply for the lower voltage full-bridge. In order to increase the efficiency and keep the ground leakage current under control, a specific PWM strategy was developed and an additional leakage current reduction circuit was added to the basic structure of the cascaded full-bridge. Moreover, the regulation of the flying capacitor voltage is taken into account. Simulations and experimental results confirm the good performance of the proposed solution.

This paper proposes a nine-level PWM grid-connected photovoltaic inverter for single-phase applications. The basic structure relies on two cascaded full-bridges supplied with different voltage levels. A flying capacitor provides the power supply for the lower voltage full-bridge. In order to increase the efficiency and keep the ground leakage current under control, a specific PWM strategy was developed and an additional leakage current reduction circuit was added to the basic structure of the cascaded full-bridge. Moreover, the regulation of the flying capacitor voltage is taken into account. Simulations and experimental results confirm the good performance of the proposed solution. © 2012 IEEE.

A Nine-Level Grid-Connected Photovoltaic Inverter Based on Cascaded Full-Bridge with Flying Capacitor / Buticchi, G.; Concari, C.; Franceschini, G.; Lorenzani, E.; Zanchetta, P.. - ELETTRONICO. - (2012), pp. 1149-1156. ((Intervento presentato al convegno 4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 tenutosi a Raleigh, NC, USA nel 15-20 Sept. 2012 [10.1109/ECCE.2012.6342688].

A Nine-Level Grid-Connected Photovoltaic Inverter Based on Cascaded Full-Bridge with Flying Capacitor

G. Buticchi;G. Franceschini;E. Lorenzani;
2012

Abstract

This paper proposes a nine-level PWM gridconnected photovoltaic inverter for single-phase applications. The basic structure relies on two cascaded full-bridges supplied with different voltage levels. A flying capacitor provides the power supply for the lower voltage full-bridge. In order to increase the efficiency and keep the ground leakage current under control, a specific PWM strategy was developed and an additional leakage current reduction circuit was added to the basic structure of the cascaded full-bridge. Moreover, the regulation of the flying capacitor voltage is taken into account. Simulations and experimental results confirm the good performance of the proposed solution.
4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
Raleigh, NC, USA
15-20 Sept. 2012
1149
1156
Buticchi, G.; Concari, C.; Franceschini, G.; Lorenzani, E.; Zanchetta, P.
A Nine-Level Grid-Connected Photovoltaic Inverter Based on Cascaded Full-Bridge with Flying Capacitor / Buticchi, G.; Concari, C.; Franceschini, G.; Lorenzani, E.; Zanchetta, P.. - ELETTRONICO. - (2012), pp. 1149-1156. ((Intervento presentato al convegno 4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 tenutosi a Raleigh, NC, USA nel 15-20 Sept. 2012 [10.1109/ECCE.2012.6342688].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/853300
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