对变电站内若干网络通信问题的探讨

RESEARCH ON SEVERAL ISSUES OF SUBSTATION NETWORK COMMUNICATIONS

变电站内的网络通信已逐渐成为变电站数据传输的基本要求，但目前尚没有统一的通信标准，国内外的通信设备在具体应用过程中也出现了各种各样的方案，也因此产生了一些分歧。文章从通信的基本原理出发对变电站内网络通信结构、传输协议、双网通信等进行了详细的探讨和分析，并参考国内外已实施应用的网络通信模式，给出了变电站内网络通信建议方案，即间隔层设备直接上网与实时传输控制协议相结合，该方案己在10～500kV变电站中得到应用，并将被西北750kV官亭超高压变电站采用，可作为相关变电站网络通信的选型参考。

The network communication within the substation is gradually becoming one of the key requirements for substation data transmission, but at present there is still not a unified communication standard for this purpose. During the application of domestic and imported communication equipments to various actual schemes appear and there are some disagreements. According to the basic principles of the communication the structure of network communication within the substation, its transmission protocols and dual-network communication are researched and analyzed in detail. Referring to the applied network communication modes home and abroad, a proposed scheme for network communication within the substation, i.e., combining the direct network access system for bay equipments with real-time transmission control protocol, is given. This scheme is adopted in the 10kV to 500W substations, and will be adopted by 750kV Guanting substation in Northwest China power grid. Besides, this scheme can also be available for reference in the mode selection of related substation network communication.