IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Paper
High Efficiency Control Method for Insulated DC-DC Converter under Light Load Condition for Photovoltaic Generation System
Yuta TeraeShohei AnzeKiyoshi OhishiHitoshi HagaTakayuki Shimizu
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2013 Volume 133 Issue 2 Pages 196-202

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Abstract

This paper proposes a high-efficiency control method for an insulated DC-DC converter with a phase-shift inverter for a single-phase grid-connected photovoltaic generation system. The proposed control method for the inverter output power is regulated by controlling each phase angle of the inverter leg and by controlling the frequency. Moreover, the inverter switching frequency is controlled by changing the input current of the main circuit, and soft-switching can be realized by controlling the frequency. The phase angle of the inverter is controlled by the output voltage of the main circuit. The validity of the proposed method is confirmed via the experimental results. Using the proposed method, we find the efficiency that improved by a maximum of 3.6% as compared with the case of the conventional method.

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© 2013 by the Institute of Electrical Engineers of Japan
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