Researvh And Realization Of Distribution Engineering CAD System Based On CIM Standard

According to the lean development direction of the power enterprises, the design requirements of the power distribution network is becoming higher and higher. At present, most of the engineering designs of the power distribution in our country mainly rely on AutoCAD system (hereinafter referred to as CAD system), but CAD system only can realize the power distribution design through some basic operations of point, line and plane, and could not match very well with the primitives of the electric appliance in GIS and DMS, which has hindered the source integration among systems, caused huge waste of the quality resources, and decreased the accuracy for the secondary entry of data.This article mainly uses CIM (Common Information Model) standard to do the secondary development based on the original CAD system, and to solve problems for the relation between the primitive entity object and the background data, and to develop and realize the intelligent CAE system for the distribution network engineering with the functions of analysis calculation, graphic design, dynamic topology, data processing and so on, which can meet the project design requirements.This article has realized CAD system of the distribution network engineering based on CIM standard by analyzing and studying the differences between CAD model and CIM model, adopting C++ and.NET programming language for secondary development, using the technology of object-oriented and parametric modeling to establish the information base for normal primitive, and using the data standardization, process normalization, information intelligent recognition (named by the intelligent equipment code), dynamic topology (physical layout reduction of line-equipment) and system integration.The system combines the object-oriented model and CAD graph in the design to solve some problems for the dynamic topology connection of the transformer, switch, cable circuit and some other power equipments, which will greatly decrease the error ratio for the secondary entry of data. The exchange time of the data has been shortened from 2-hour labor entry to 10-second automatic transform, which will greatly improve the working efficiency. At the same time, the effective combination of the primitive establishment and topology analysis based on CIM standard will minimize the time for completing the graph from one month to two weeks, which will improve half efficiency. Meanwhile, the system will realize the integrative operation mode of" graphic design-drawing circulation-data input", reduce 2/3 workload of the designer and nearly 70% workload of data engineers, and synchronously decreases the maintenance cost for the business information system which relates to the engineering design of distribution network.According to the practice of the subject project, the system has effectively matched the interaction of CAD, CIS, DMS and some other systems, which provides a shortcut for updating the distribution network data. On the other hand, it has effectively made up for the data entry lag problem which caused by the lack of topographic map in GIS system. SVG data pattern can effectively promote the data sharing of the distribution network engineering design. The secondary development result which fuses with CIM concept has improved the efficiency and quality of the distribution network engineering design and guaranteed the effective sharing and comprehensive utilization of the data. The closed-loop management of the business process has enhanced the coordination of departments. Working in the unified platform will make the complex business well-organized.