Control strategies for a photovoltaic--Energy storage hybrid system
GAO Zhiqiang, MENG Liang, LIANG Bin, TANG Baofeng, FAN Hui, SUN Zhongji
Energy Storage Science and Technology . 2013, (3): 300 -306 .  DOI: 10.3969/j.issn.2095-4239.2013.03.017