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Study on Applying XML to Data Architecture for Chongqing Electric Dispatching Management Information System

Author: XieTao
Tutor: LuJiPing；LiuXiaoXian
School: Chongqing University
Course: Electrical Engineering
Keywords: XML Dispatching Management Information System CIM Data architectonics Web Services
CLC: TM734
Type: Master's thesis
Year: 2005
Downloads: 103
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Abstract


Due to ever increasing complexity and variability of the Power systems requirement, Traditional Dispatching Management Information System(DMIS) is now becoming harder to fit electric enterprise gradually. The existing data model formats that derive from DMIS models can’t rebuild and operations intelligently along with variability of the Power systems requirement. This paper put an idea of that DMIS data models have adopted an approach that uses the semantic data definitions from the CIM/RDF with the syntax of XML and XML schema to create XML files containing operational power system models. The CIM/RDF can represent all of the major objects of an electric utility as object classes, as well as attributes and their relationships. CIM/RDF uses these object classes and attributes to establish the common model of independently developed applications between DMIS and other information systems that are concerned with different aspects of Electric Dispatch.CIM/RDF can be transfer to XML Schema easily. XML Schema provides an expressive type system for XML Schema capable of providing many powerful services for data modeling. XML Schema definitions include simple and complex type definitions. Simple type definitions allow you to define custom value spaces for text-only elements and attributes. Complex type definitions, on the other hand, allow to arrange simple types into structures. Complex type definitions support derivation by extension and restriction, allowing you to define complex type hierarchies in a way that maps nicely to 00 class hierarchies. With complex type hierarchies in place, it’s also possible to leverage substitution techniques in instance documents. XML Schema also makes it possible to factor XML Schema definitions into multiple files and namespaces, which can then be included and/or imported to increase reuse and simplify maintenance.With the rapid development of electric dispatching, it is more and more difficult for a single application system to achieve all the business requirements. It’s a trend that two or more application systems to exchange data each other .But the system models are stored in different formats, making the exchange of these models difficult. In order to support the data exchange between DMIS and other application of power system, data format entities and relationships needed to agree on common definitions of power system, this paper put an idea of heterogeneous databases integration based on XML and ADO. NET, and also make a detailed exposition of key technology.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system scheduling, management, communication > Automation of power system scheduling
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