线路保护通信通道的分析

文章简要介绍了电流保护、距离保护和纵联保护三类线路保护的判据、动作原理、优缺点和应用范围，重点分析了纵联保护的原理和通道需求，从光缆、通信接口、通道时延、数据同步等方面对纵联保护的通信通道展开探讨，提出了保护、通信配置的若干建议，供工程参考。

Discussion on the Channel of Line Relay Protection

There are three classifications of line relay protection： the current protection, the distance protection and the pilot relay protection. This article introduces the judgment, the principle, the advantage and applications of them hereinbefore. Based on the discussion on optical cable, communication interface, time delay and data synchronization, the prin- ciple and the channel demand of the pilot relay protection are analyzed. The article also put forward some suggestions on protection and telecommunication network configuration.