Study On Flexible Dynamic Report System Based On Heterogeneous Power Information Source

With the reform of Chinese power industry deepens, the corporations' operation of power system veers to the intensive management mechanism ulteriorly to improve the economy benefit. But this mechanism must be supported by the integrated information system that is composed of the management, business, production and distribution. In the integrated power information system, report is of great importance. It is a general mode for the information to flow in different management levels of power system. The data derived from report is the main gist for the managers to query, analyze the conditions of production and management or make some vital decisions. Today the further development of power system brings up higher requirements for the report, which means report should changes accordingly in the format and content to meet the varying requirements of users. However, on one hand at present the reports of power system are mainly derived from some developed application system. These application systems are developed by different program language to meet user's requirement of that time. The content and format of report in these application systems are fixed and repeated, which shorten the report's use Hfecycle and need much maintenance work and finally the reports have to be made by hands. On the other hand, different application systems aim at particular aspects of power system. Probably they are running on different operating system, hardware or location. Those systems are rarely designed to exchange data freely with others. They become "automation islands" and the heterogeneous power information system is formed. So the redundancy of data is tremendous, the data source of report is unitary and lack of consistency.Under the background above an idea of flexible dynamic report system, which is based on three-layer structure in the heterogeneous power information system, is presented in this paper. With the guidance of object-oriented idea and the theory of flexible software, report is described as a three-layer model that consists of the origin-data layer, the data-processing layer and the format layer. The format of report is separated from its data, which makes the data variable, the format fictile and the processing of data modularized. The problem of fixed report template and data is solved. Users can adjust reports' format and content easily at any moment. The data of report are dynamic and can be refreshed when needed. Furthermore it can supply different report solutions aimed at different users. The flexible dynamic report system reduces the software investment of power corporations, extends the Hfecycle of information management software and enhances the work efficiency. The conception, realization methods and program flow are presented particularly in the paper. Moreover the integration methods of current application systems in power corporations to realize the data exchange and information share are discussed in detail. A new method based on gateway datadispatch mechanism for the interconnection between different application systems is brought up in the end. This method not only guarantees the security of SCADA but also realized the integration and data sharing of multi-heterogeneous application systems. It provides the integrated data source for the flexible dynamic report system and guarantees the consistence of data. At the same time the foundation for developing advanced function such as business decision-making analysis and data mining is established.Towards the trend of Internet/Intranet in the power information system the web mode of flexible dynamic report system is discussed in the paper. A technique using ActiveForm to develop web applications of power system is presented and the topic on how to connect web applications to the database is also discussed in the paper.Finally an application instance of flexible dynamic report is shown. The faultiness and direction of extensive research activity are also stated.