This paper analyzes the performance of a grid-tied photovoltaic module integrated, transformerless, three-phase Current Source Inverter (CSI). The design exploits CSI inherent step-up capability to obtain a single stage power interfacing between the low voltage PV input and the high AC voltage output, to be fed into the distribution grid. A modified CSI converter topology is proposed along with a suitable PWM strategy and a simple closed loop control. The theoretical analysis and simple analytic expressions highlighted the performance and limitations of the topology when employed in single-stage PV microinverter supplied by a single low voltage PV panel. The principle of operation and control is described, and the traditional CSI topology has been simulated numerically in Matlab/Simulink environment. Results obtained with the proposed topology are presented and evaluated in order to validate the theoretical assumptions.
Performance Analysis of a Modified Current Source Inverter for Photovoltaic Microinverter Applications / Lorenzani, Emilio; Immovilli, Fabio; Bianchini, Claudio; A., Bellini. - ELETTRONICO. - (2013), pp. 1809-1814. (Intervento presentato al convegno 39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 tenutosi a Vienna (Austria) nel 10-13 Nov. 2013) [10.1109/IECON.2013.6699406].
Performance Analysis of a Modified Current Source Inverter for Photovoltaic Microinverter Applications
LORENZANI, EMILIO;IMMOVILLI, Fabio;BIANCHINI, Claudio;
2013
Abstract
This paper analyzes the performance of a grid-tied photovoltaic module integrated, transformerless, three-phase Current Source Inverter (CSI). The design exploits CSI inherent step-up capability to obtain a single stage power interfacing between the low voltage PV input and the high AC voltage output, to be fed into the distribution grid. A modified CSI converter topology is proposed along with a suitable PWM strategy and a simple closed loop control. The theoretical analysis and simple analytic expressions highlighted the performance and limitations of the topology when employed in single-stage PV microinverter supplied by a single low voltage PV panel. The principle of operation and control is described, and the traditional CSI topology has been simulated numerically in Matlab/Simulink environment. Results obtained with the proposed topology are presented and evaluated in order to validate the theoretical assumptions.Pubblicazioni consigliate
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