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

Author

Chang, Chien-Hsuan ; Chang, En-Chih ; Cheng, Hung-Liang

Author_Institution

Dept. of Electr. Eng., I-Shou Univ., Kaohsiung, Taiwan

Volume

28

Issue

6

fYear

2013

fDate

Jun-13

Firstpage

3039

Lastpage

3046

Abstract

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.

Keywords

DC-DC power convertors; diodes; rectifiers; solar cell arrays; zero current switching; zero voltage switching; LLC resonant DC-DC converter; SAS; ZCS; ZVS; circuit operations; circuit parameters; high-efficiency solar array simulator; photovoltaic system testing; rectifier diodes; theoretical equations; zero-current switching; zero-voltage switching; Equivalent circuits; Inductors; Rectifiers; Resonant frequency; Synthetic aperture sonar; Zero current switching; Zero voltage switching; LLC resonant dc–dc converter; photovoltaic (PV) system; solar array simulator (SAS);

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2012.2205273

Filename

6220895