High-Efficiency Power Conditioning System for Grid-Connected Photovoltaic Modules

Woo-Young Choi; Jae-Yeon Choi

High-Efficiency Power Conditioning System for Grid-Connected Photovoltaic Modules

Woo-Young Choi

Jae-Yeon Choi

Vol. 11, No. 4, pp. 561-567, Jul. 2011

10.6113/JPE.2011.11.4.561

Photovoltaic

Power conditioning system

Power-efficiency

Power-factor

Step-up DC-DC converter

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Abstract

This paper presents a high-efficiency power conditioning system (PCS) for grid-connected photovoltaic (PV) modules. The proposed PCS consists of a step-up DC-DC converter and a single-phase DC-AC inverter for the grid-connected PV modules. A soft-switching step-up DC-DC converter is proposed to generate a high DC-link voltage from the low PV module voltage with a high-efficiency. A DC-link voltage controller is presented for constant DC-link voltage regulation. A half-bridge inverter is used for the single-phase DC-AC inverter for grid connection. A grid current controller is suggested to supply PV electrical power to the power grid with a unity power factor. Experimental results are obtained from a 180 W grid-connected PV module system using the proposed PCS. The proposed PCS achieves a high power efficiency of 93.0 % with an unity power factor for a 60 Hz/120 Vrms AC power grid.

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Cite this article

[IEEE Style]

W. Choi and J. Choi, "High-Efficiency Power Conditioning System for Grid-Connected Photovoltaic Modules," Journal of Power Electronics, vol. 11, no. 4, pp. 561-567, 2011. DOI: 10.6113/JPE.2011.11.4.561.

[ACM Style]

Woo-Young Choi and Jae-Yeon Choi. 2011. High-Efficiency Power Conditioning System for Grid-Connected Photovoltaic Modules. Journal of Power Electronics, 11, 4, (2011), 561-567. DOI: 10.6113/JPE.2011.11.4.561.