An approach to distributed information management systems for power system applications

  • Li Ma

    Student thesis: Doctoral Thesis


    A distributed information management system combining a power system host computer and a number of local computer platforms will allow power system off-line engineers to share information from the host computer on their local computer platforms for power system analysis and planning. A common information management environment for the local computer platforms is the basis of such distributed systems. This work has concentrated on the development of a prototype of such a common local information management environment, called Power Shell, for PC platforms.

    Power system management, operation, analysis and planning involve collecting, storing, communicating, evaluating and finally processing very large scale information and data sets. Power Shell has, therefore, been developed with the aim of enabling local PC platforms to match the capability of the host computer on managing one-line network diagram and device parameters in order to avoid data overflow when very large scale power systems are involved. A data flow scheduling technique has been developed and used for coping with the limitation of the local computer internal memory capacity. This technique consists of the concept of drawing boards, mapping and projection matrices, and the method of diagram information partitioning. Based on the capability of Power Shell in managing large scale information, which makes it possible to store very large scale power system static description data in local platforms, efficient communication in the distributed system can then be achieved by transmitting only the power system dynamic status data.

    Other objectives achieved in the Power Shell development include the capability of accommodating different data formats for various power system application programs and allowing access to commercial software tools. This involves the use of a data dictionary technique for allowing flexible data format redefinition, and MS-Windows and PARADOX database techniques for implementing a standard user friendly interface and ensuring compatibility with commercial word processing and database systems.

    As a running system, Power Shell has been tested using the data from some industrial power system networks. The test results have been satisfactory and demonstrated that a PC based common information management environment such as Power Shell is of significant benefit for power system studies and applications. It can assist power system analysis and planning for very large scale power system networks and can be used as a standard operation environment for various power system applications having different data formats, where the possibility of using other commercial software tools is also desirable.
    Date of AwardMay 1995
    Original languageEnglish
    SupervisorCuneyt Ozveren (Supervisor)

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