110kV Digital Substation Design

Digital substation is composed of intelligent equipment and network layered constructionequipment, can realize the intelligent electrical equipment in substation information sharingand interoperability between the modernization of substation. Along with the construction ofwith special high-voltage power grid as strong smart grid backbone network, the coordinateddevelopment of power grids at all levels of the target put forward, the construction anddevelopment of intelligent substation will be put on the process. Digital substation is the baseof intelligent substation development, is an important node in the smart grid construction. Inthis paper, combined with the110kV digital substation project, we research on the designmethod of digital substation.Firstly, the paper introduces the research status of substation automation technology andthe digital substation, the main technical characteristics of digital substation is discussed fromthe traditional substation, introduces the overall technical architecture of digital substation.Secondly, for the intelligent digital of the substation primary equipment, discusses theworking principle and the structure, technical performance of the electronic transformer andthe merging unit, and studies the realization mode of the intelligent primary equipment basedon intelligent terminal, the proposed configuration principle and method of the electronictransformer, merging unit and intelligent terminal.Again, for the digital substation network secondary equipment, discusses the networkhierarchy architecture of substation, and according to the network architecture of hierarchicalorder, respectively expounds the station control layer, spacer layer, process layer structure,characteristics, and the function and performance requirements, and the station control layer,spacer layer, network layer configuration process the two principle and equipmentconfiguration for each layer characteristics and requirements are given.Finally, this paper introduces the general situation of a110kV digital substation practicalengineering, presents the specific implementation scheme of digital substation, and the overalldesign scheme, design of power distribution device, network scheme, monitoring andprotection system scheme are described and analyzed in detail.