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http://dx.doi.org/10.6113/JPE.2011.11.4.561

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

Choi, Woo-Young (Division of Electronic Engineering, Chonbuk National University)
Choi, Jae-Yeon (Division of Electronic Engineering, Chonbuk National University)
Publication Information
Journal of Power Electronics / v.11, no.4, 2011 , pp. 561-567 More about this Journal
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.
Keywords
Photovoltaic; Power conditioning system; Power-efficiency; Power-factor; Step-up DC-DC converter;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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