变电站监控软件中OPC服务器程序的开发.pdf

1 摘要 摘 要 随着电力工业的不断发展，变电站的结构和运行方式日益复杂，使得 监控软件必须具有良好的开放性，能够灵活地集成不同厂家生产的遵循不 同通信协议的现场设备。 本文应用组件软件的思想以及COM （Component Object Model,组件对 象模型）/DCOM （Distributed Component Object Model，分布式组件对象模 型）技术，采用客户/服务器的结构模式，开发了新一代变电站监控软件 As2000 中的OPC （OLE for process control ）服务器程序。由于客户程序与 服务器程序之间遵循OPC 技术规范，不同的客户程序与服务器程序之间可 以使用通用的方式进行数据交换，从而较好地解决了监控软件中的开放性 问题。 本文采用VC ＋＋作为开发工具。利用ATL (Active Template Library， Active 模板库)工具进行COM 组件的设计。运用面向对象的设计模式对整 个OPC 服务器程序进行了开发并建立设备管理与调度的基础类库，该类库 具有较强的灵活性、复用性与扩展性。 本文对OPC 服务器程序的功能进行了各个方面的测试，测试表明OPC 服务器的数据访问具有通用性，同时也表明使用OPC 技术方案的可行性。 关 键 词： 监控软件 组件对象模型 OPC 设计模式 论文类型： 应用基础 1 ABSTRACT ABSTRACT With the development of power industry, the structure and running mode of substation become more and more complex. The SCADA must be open and able to integrate the field devices flexibly, which produced by different factory and with different communication protocols. In this paper, the idea of component, the COM (Component Object Model)/DCOM (Distributed Component Object Model) technique and the Client/Server architecture have been used to develop the OPC server program in a new type of SCADA named As2000 for substation. With the OPC technical specification, different clients and servers can exchange data by general method, which makes the SCADA open. In this paper, the VC++ has been used as the tool of development. COM component is designed by ATL (Active Template Library). The object oriented design patterns have been used to build the foundation class library for the device management and scheduling. This class library has the advantage of agility ，reuse and expansibility. L