• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2014, Vol. 35 ›› Issue (11): 25-31.doi: 10.3969/j.issn.1000-7229.2014.11.005

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Research Status of Residential DC Microgrid Power Supply Technology

YANG Danping1,YE Lin1,ZHAO Yongning1,CHEN Zheng2,HE Guixiong3   

  1. 1. College of Information and Electric Engineering, China Agricultural University, Beijing 100083, China;2. Xiaogan Power Supply Company, Xiaogan 432100, Hubei Province, China;3.China Electric Power Research Institute, Beijing 100192, China
  • Online:2014-11-01

Abstract:

With the increasing of the capacity of distributed energy resources, the problem of power quality and power loss caused by distributed energy resources paralleling in the grid has become a big challenge, which can be effectively alleviated by applying DC supply in distribution networks. In recent years, because of the rapid development of power electronic technology and the significant improvement of work efficiency and rated capacity of AC/DC converter and DC/DC converter, the network loss of DC power supply system has been reduced. Meanwhile, the compatibility of household appliances with DC power supply has been improved, so the residential DC power supply technology will inevitably become the trend of research and development in the future. The research status of residential DC power supply technologies around the world were systematically reviewed, and the advantages and feasibility of these technologies were analyzed. Finally, a typical residential DC micro-grid model was proposed. The involved technical problems, such as the determination of voltage level, the choice of networking mode and the system protection and control were discussed in detail. Some prospects on the development of DC power supply technologies were also presented.

Key words: residential DC microgrid, voltage level, load model, supply mode, voltage control