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A High-Efficiency Solar Array Simulator Implemented by an LLC Resonant DC–DC Converter

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3 Author(s)
Chien-Hsuan Chang ; Dept. of Electr. Eng., I-Shou Univ., Kaohsiung, Taiwan ; En-Chih Chang ; Hung-Liang Cheng

In this paper, a high-efficiency solar array simulator (SAS) implemented by an LLC resonant dc-dc converter is proposed to save the cost and energy of photovoltaic (PV) system testing. The proposed converter has zero-voltage switching (ZVS) operation of the primary switches and zero-current switczero-current switching (ZCS) operation of the rectifier diodes. By frequency modulation control, the outputhing (ZCS) operation of the rectifier diodes. By frequency modulation control, the output impedance of an LLC resonant converter can be regulated from zero to infinite without shunt or serial resistors. Therefore, the efficiency of the proposed SAS can be significantly increased. The circuit operations are analyzed in detail to derive the theoretical equations. Circuit parameters are designed based on the practical considerations. Finally, an illustrative example is implemented to demonstrate the feasibility of the proposed SAS.

Published in:

Power Electronics, IEEE Transactions on  (Volume:28 ,  Issue: 6 )

Date of Publication:

June 2013

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