The Design And Implementation Of Digital And Intelligent Data Service And Technical Support Platform For Distribution Network

The realization of intelligent distribution network is the key to and an important part of the smart grid, and informationization, automation, digitization form the basis and necessary conditions for intelligence. For distribution system, a variety of effective implementation of intelligent functions, particularly decision support functions must be built on panoramic view of information data of various types in the system, which requires one company of distribution system should have the ability to integrate all its business data.In this paper, we implement distribution network data service and technical support platform. The platform is based on the latest international standards and current international advanced theories and techniques. The platform is the infrastructure for unified planning and design of distribution network DMS. Also the platform is the infrastructure for and integration of the existing applications of distribution network.In this issue, according to IEC61970, IEC61968 specification we establish the common information model (CIM) of distribution network, and establish the common data, that will be used by distribution network applications, based on CORBA technology and Data Distribution service (DDS), implement standard data interfaces--GID, and exchange data with the distribution network application in a uniform interaction mechanism; thus the common data service platform for the distribution network. Further, this platform implements IEC61970 GID proxy and cascade mechanisms and integrates new and old application systems.For distribution network applications which support IEC61970 GID and CIM, we directly integrate their data into data service platform through the GID/CIM proxy mechanism; For existing distribution network application which does not support IEC61970 GID and CIM, we develop GID and CIM adapter separately. So the existing applications can provide data using unified data model and interface, and can be integrated into the data platform. Finally, we build the distribution network comprehensive data service platform. And on this basis, we design the common technical platform architecture and achieve a common accumulation of technology.This paper describes the design and implementation of two components of the data service and technical support platforms:the historical data management component and the single line diagram auto-generation component. For the history data management component, we define the service interface of the components using the CORBA IDL; implement historical data storage based on Oracle Berkeley DB; support distributed access using CORBA Trading Service. For the single line diagram auto-generation component, we sort the electrical wiring diagrams by connection type; extend the Common Information Model (CIM), by adding the property for connection type of single line diagram; implement a layout algorithm for each connection type; finally, we implement the drawing of connectivity node based on Dijkstra algorithm.By building data services platform, we fully integrate all business data of distribution network, make the realization of intelligent distribution network possible. And By building technical support platform, we simplify data maintenance and improve the application development efficiency.