Smart substation integration technology and its application in distribution power grid

Abstract

At present, smart substations use the IEC61850 standard based on the architectural framework of three layers and two networks to realize information digitization and advanced applications. Although the smart substation offers many improvements in design, equipment manufacturing, and construction, the intelligent devices used in smart substations are costly, and are also difficult to maintain since they are dispersed within a single unit. Functionality optimization and device integration, thus, have become important issues in smart substation development. This paper presents an integrated solution and implementation process for a smart substation system. In the process layer, an integrated intelligence component is developed that functions both as an intelligent terminal and a merging unit. In the bay layer, an integrated station-area protection measurement and control master device is designed to achieve such functions as protection, monitoring, control, fault recorder, and power quality monitoring. Finally, in the station control layer, an integrated information platform is established to bring together various system functions and to promote interactive sharing. Integration technology improves the economy and practicality of the smart substation, especially in a distribution power grid.