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Lookup NU author(s): Dr Yihua Hu,
Dr Wenping Cao,
Dr Bing Ji
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Renewable energy is high on international and national agendas. Currently, grid-connected photovoltaic (PV) systems are a popular technology to convert solar energy into electricity. Existing PV panels have a relatively low and varying output voltage so that the converter installed between the PVs and the grid should be equipped with high step-up and versatile control capabilities. In addition, the output current of PV systems is rich in harmonics which affect the power quality of the grid. In this paper, a new multi-stage hysteresis control of a step-up DC-DC converter is proposed for integrating PVs into a single-phase power grid. The proposed circuitry and control method is experimentally validated by testing on a 600W prototype converter. The developed technology has significant economic implications and could be applied to many distributed generation (DG) systems, especially for the developing countries which have a large number of small PVs connected to their single-phase distribution network. © 2014 Elsevier Ltd.
Author(s): Hu Y, Cao W, Ji B, Si J, Chen X
Publication type: Article
Publication status: Published
Journal: Renewable Energy
Print publication date: 01/02/2015
Online publication date: 24/08/2014
Acceptance date: 04/08/2014
ISSN (print): 0960-1481
Publisher: Elsevier Ltd
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