遵循IEC 61970标准的实时数据库管理系统

实时数据库管理系统是调度自动化系统支撑平台乃至整个系统的核心内容，实时数据库遵循IEC61970CIM／CIS标准，是新一代系统标准化和组件化的关键。文中从数据库定义，数据库实体和数据库访问等3个方面讨论了遵循IEC 61970标准的实时数据库管理系统的设计和实现。为了满足CIM／CIS的要求并兼容原有应用，数据库定义以CIM（公用信息模型）为基础，能转换成层次型和关系型数据模式，数据库实体采用磁盘文件映射的内存管理机制，以改进ORB方式进行网络分布，数据库访问采用同一实体提供面向对象，层次和关系等3类访问接口的三位一体方式,这种数据库管理系统在传统实时数据库的基础上，克服了为遵循IEC 61970标准的改造的困难，可用于新一代调度自动化系统。

REAL-TIME DATABASE MANAGEMENT SYSTEM (DBMS) THAT CONFORMS TO IEC 61970 STANDARD

Real-time database management system (DBMS) is the support platform of the dispatching automation system and even the core of the whole system. The key to standardization and modularization of a new generation of the system is that the real-time database should abide by IEC 61970 standard. This paper discusses the design and realization of the real-time DBMS that conforms to IEC 61970 standard in such aspects as the definition, the entity and access of the database. To meet the requirement of CIM/CIS and embrace the legacy applications, the database is defined based on CIM and can be transformed into hierarchical schema and relational schema. The entity of the database adopts the map-called method in which the file system object can be mapped into the virtual memory directly and distributed in the improved ORB architecture. The access of the database applies the trinity method in which the same entity has three characteristics. On the basis of the traditional real-time database, the proposed DBMS has overcome the difficulty in the reform for conforming to IEC 61970 standard and can be used in the new generation of the dispatching automation system.