The distribution network GIS data model is constructed by the relevant classes and relationships which are extracted from the CIM packages. The packages include Core, Topology, Wires, Meas, etc. Meanwhile, the spatial data exchange model of distribution network is discussed. Relational database technologies are applied to implement the spatial database of distribution network GIS, and generalization, aggregation and association relationships are converted to the reference relations between tables. The proposed storage method of data model can prevent the relationships of total model from falling on the leaf nodes, and then reduce the relation's complexity among objects. Using object-oriented technology, the classes of GIS data model are extended by adding maintenance operations and the necessary attributes. The maintenance operations are utilized to generate commands which can maintain the data and relationships of spatial database. The Mount and Unmount operations are added to conducting equipment class, which can establish topological maintenance commands to maintain electrical relationships of conducting equipment. Case study shows that the approaches of class extending adopted by this paper make objects have responsibilities to sustain distribution network topology, and then reduce the maintenance difficulties of spatial database.%选定CIM模型中的核心、电线、拓扑、量测等包中的相关类和关系作为构建配电网GIS数据模型的CIM子集,并对空间数据交换模型进行了阐述.采用关系型数据库实现配电网GIS空间数据库的设计,将数据模型中的泛化、聚合和简单关联映射为关系型数据库的表间引用关系.提出的数据模型存储方法避免了类间关联全部下落于叶节点类,降低了叶节点对象之间关系的复杂度.通过对配电网GIS数据模型中的类进行适当扩展,为其添加数据维护操作和必要的属性扩展,进而生成数据维护命令,使数据和关系维护变成类对象自身的责任.通过为导电设备类增加Mount和Unmount操作来封装对导电设备的安装和拆除过程,生成拓扑维护命令,改变导电设备安装或拆除后的网络电气连接关系.实例研究表明,所提出的GIS数据模型存储与维护方法降低了配电网对象之间关系维护的复杂度.
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