基于CIM的仿真培训系统实时数据库的设计

针对仿真培训系统实时性的要求，在IEC 61970 CIM公共信息模型的基础上，通过在电力设备之间定义连接端的 方式实现设备连接建模，从而建立了集控站仿真培训系统的面向对象的数据模型.设计了一个常驻内存的实时面向对象数 据库系统（MMRT OODB），利用Windows NT操作系统内存管理技术，把整个数据库映射进虚拟存储空间，避免了数据结 构的转化.同时提出了内存映射、线程同步、数据一致性与并发控制等一些高性能MMRT 00DB的关键实现技术.结果表明 ，数据库常驻内存，采用一体化的单一级储存结构，并在客户端缓存数据，能使数据库系统性能得到很大的提高

Real-time database design of CIM based training simulation system

Considering the requirement of real-time performance in training simulation system,based on IEC 61970 common information model(CIM),the connection model of equipment was built by defining connective terminals between the electric power equipment,and then object-oriented data model of the training simulation system for centralized control substation was established.The memory resident real-time object-oriented database system(MMRT-OODB) was designed.Using the memory management technology of Windows NT operation system,the whole database was mapped into virtual storage space to avoid transforming the data structure.Some key implementation technologies,including memory mapping,thread synchronization,data coherence and concurrent control for high-powered MMRT-OODB,were presented.Analysis shows that use of memory resident database,single-level storage structure and client data buffer cache will remarkably enhance the performance of the database system.