The optical line protection system (OLP) is a long-distance optical transmission network production system, which has a very important practical value.

光线路保护系统是一种基于现代通信毫秒级光开关为基础的具有重要实践意义的长距离光传输网络保护系统。

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The main development trend of high voltage transmission line's protection is the line fiber optical differential protection.

光纤电流差动保护是高压线路主保护的发展趋势。

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It compares the pilot distance protection with power line carrier (PLC) in the single or double frequency and the differential protection with optical fiber in the loop or chain connection.

比较单频率与双频率载波通道的纵联距离保护和环状与链状连接光纤通道的差动保护方案。

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