一种能实现异种网络互联的通信控制器

变电站内通信网络的多样性给了用户更多选择，同时也带来了如何将这些异种网络互联以实现互操作的现实问题。变电站内的设备同样面临看数据集中、传输和维护的新课题，一个可行的解决方法就是实现设备网络化。文中基于嵌入式以太网技术，设计了一种具有多种接口，能实现异种网络互联的通信控制器。通过这种通信控制器，可以实现低速的串行总线、现场总线网络和高速以太网之间的互联，以及串行总线协议和现场总线协议到TCP／IP协议的转换，从而实现不同厂商的异种网络互联，构建出高速、可靠、开放的站内通信网络。由于以太网和Internet能够方便地实现互联，对变电站内智能电子设备(IED)的数据访问可以方便地扩展到整个广域网范围内，从而实现基于Internet的远程控制。

A COMMUNICATION CONTROLLER FOR HETEROGENEOUS NETWORK INTERCONNECTION

While offering users more options, the diversity of communication networks in a substation raises the problem of how these heterogeneous networks should be interconnected and interoperating. The devices in a substation are also facing the difficulty of data concentration, transmission and maintenance. A feasible solution is to have the devices networked. Based on an embedded Ethernet, a communication controller with multiple interfaces for heterogeneous network interconnection is presented in this paper. Through this communication controller, the interconnection between low speed serial bus or field-bus and high speed Ethernet and the conversion from serial bus and field-bus protocol to TCP/IP protocol can be realized easily. On the other hand, due to the convenient interconnection between Ethernet and Internet, data access to the intelligent electronic devices (IEDs) in the substation can be extended to the entire WAN, thus realizing Internet-based remote control.