基于C37.94协议的纵差保护复用通道故障诊断方法

A fault detection method for multiplex channel of longitudinal differential protection based on Protocol C37.94

提出了一种基于IEEEC37.94协议的纵差保护通信方案,其核心是采用C37.94协议作为保护装置及通信接口装置之间通信的数据链路层协议,在协议规定的通信管理开销部分自定义六种互相独立的故障图景,故障图景和故障点存在一一对应的关系,从而使纵差保护复用通道实现了自诊断功能。在通道发生故障时,保护装置和通信接口装置将根据通道实时状态转发故障图景,运行人员通过查看通道任一侧的保护装置所接收到的故障图景,即可以准确地定位通道故障点。

A longitudinal differential protection communication scheme is proposed based on IEEE C37.94 Protocol, which mainly employs IEEE C37.94 Protocol as data link layer protocol for the communication between protection device and interface device, and six independent fault images in communication management overhead area are customized, which make the multiplex channel of the longitudinal differential protection have self diagnosis ability because each fault image corresponds to one and only fault location. When the fault occurs in the multiplex channel, the fault image is forwarded by the protection device and communication interface device according to the real state of the channel, and then operators can easily identify accurate defect location by checking the fault image received by protection device at either side.