发电厂辅机程控系统的网络与通讯

Network and Communication of Program-controlled System for Auxiliaries in Power Plant

常规火电厂辅机系统的自动控制系统应包括 3个层面 :管理层、操作层和现场层。管理层能有效地向管理者提供总体和关键信息 ;操作层为操作者及时提供所有设备的状态信息 ,同时将操作者的所有指令准确地送达控制设备 ;现场层可实现所有现场一次设备与控制设备之间的实时通讯 ,具有良好的抗干扰能力和长距离传输能力。采用现场总线作为现场层网络是最佳选择。

The automatic control system of the auxiliary system in the conventional thermal power plant includes three levels: management, operation and field. The management level is capable to give general and key information to the managers effectively; the operation level gives status information of all equipment to operators and sends out all command from operators to the controlled equipment accurately; the field level can realize the real time communication between the primary equipment and control device on site. This level is capable of good anti-interference and long distance transmission. Application of field bus will be the best choice for the network of the field level.