Control strategies for a photovoltaic--Energy storage hybrid system

doi:10.3969/j.issn.2095-4239.2013.03.017

Abstract

Abstract: Due to weather conditions, the output power of Photovoltaic (PV) systems often experience significant fluctuation. The PV power is therefore neither a constant voltage source nor a constant current source. This can lead to a series of issues when connected to a power grid including power surge, requirement of more spinning reserve capacity and difficulties in participating power grid dispatching. The use of energy storage could improve the quality of PV output via controlling the power output. In this article, a Photovoltaic - Energy Storage Hybrid System is proposed and topology diagram and a control strategy are presented. A power converter system (PCS) is designed and analyzed for the energy storage system. These are validated through simulation using operation data of a real PV power station.

Key words: solar photovoltaic-energy storage hybrid system, power converter system, bidirectional DC/DC converter, grid-side converter, control strategy

CLC Number:

TK02

GAO Zhiqiang, MENG Liang, LIANG Bin, TANG Baofeng, FAN Hui, SUN Zhongji. Control strategies for a photovoltaic--Energy storage hybrid system[J]. Energy Storage Science and Technology, 2013, 2(3): 300-306.

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