标题：Research on photovoltaic DC power supply system for office
作者：Wang, Hui ;Wu, Jiang ;Gao, Hou Lei ;Yuan, Jian Hua
作者机构：[Wang, Hui ;Gao, Hou Lei ] School of Electrical Engineering, Shandong University, Jinan, Shandong, 250061, China;[Yuan, Jian Hua ] School of Eelectric 更多
会议名称：2014 International Conference on Energy Research and Power Engineering, ERPE 2014
会议日期：17 May 2014 through 18 May 2014
来源：Advanced Materials Research
关键词：DC circuit; MPPT; Office equipment; Photovoltaic
摘要：This paper discusses the post stage power supply circuit's structure of electronic appliances such as laptops, desktops, mobile phones and digital cameras, which are commonly used in office. The advantages and feasibilities of DC power supply's substitution for AC are analyzed. On this basis, a DC power supply system consists of photovoltaic cells, batteries, AC/DC modules, DC/AC modules as well as DC loads is brought forward. The main power supply unit, photovoltaic cells, connects the DC bus through a DC regulator circuit. The bus voltage can be maintained stable by real-time adjustment of photovoltaic cells' output power. The battery module connects the DC bus through a bidirectional Boost-Buck circuit. The charges and discharges of batteries can be real-time controlled according to the bus voltage level. The AC/DC module connects the DC bus as a backup, which can real-time detect the bus voltage to determine whether to start. The DC/AC module can supply power to ordinary AC loads and the DC loads are usually powered from the bus through DC/DC converters. © (2014) Trans Tech Publications, Switzerland.