二纤单向通道保护环实现双向三端纵差保护

Bidirectional Three-terminal Differential Protection Realized by 2-fiber Unidirectional Path Protection Ring

针对三端纵差保护对传输通道的要求及调试过程中出现的现象,结合延安供电局光纤网络现状,通过对不同传输通道应用方式的比较,最终在不改变现有网络结构、不增加设备投资的情况下,选择双逻辑系统解决在原二纤单向通道保护环中实现2M通道点对点收发同路径的问题。实践证明,该方法不仅满足三端纵差保护要求,消除了失步现象,使保护可靠投切,而且减少通信投资,节约资源,为电力通信系统类似纵差保护应用提供了可借鉴的经验。

In the light of the requirement of three-terminal differential protection to transmission path and the phenomenon in the commissioning, combined with the current state of fiber network in Yan＇ an Power Supply Bureau, through the comparison of different transmission path modes, 2M path point-to-point sending-receiving in same path at former 2-fiber unidirectional path protection ring has been realized by double logic system under the condition of no change of current network structure, no addition of equipment investment. The practice shows that the method can not only satisfy the requirements of three-terminal differential protection, eliminate the falling out of step, ensure reliable switching of protection, but also can reduce the communication investment, save resources, supply references for the application of similar differential protection.