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.