Designing a Single-Stage Inverter for Photovoltaic System Application

Author:

Tsai M. T.1,Chu C. L.1,Mi C. M.1,Lin J. Y.1,Hsueh Y. C.1

Affiliation:

1. Southern Taiwan University of Science and Technology, No. 1, Nan-Tai Street, Yungkang District, Tainan City 710, Taiwan

Abstract

This paper focuses on a full-bridge high-frequency isolated inverter which is proposed for distributed photovoltaic power supply application. The researched system consists of a full-bridge high-frequency DC/DC converter with the proposed symmetric phase-shift modulation algorithm to achieve the ZVS switching function and a line frequency unfolding bridge. It replaces the traditional two stages of independent control algorithms with a one-stage control to obtain high conversion efficiency. A TMS 320F2812 digital signal processor-based control technique is used to achieve the desired algorithm function for the grid-connected photovoltaic power system application. The researched system can have two operating methods depending on the applied situation. Finally, a prototype of 300 W with the maximum power point function is settled to verify the proposed idea.

Funder

National Science Council

Publisher

Hindawi Limited

Subject

General Engineering,General Mathematics

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