Then, it explains the application of WDM/DWDM on optical fiber transmission lines.
接着，叙述WDM在光纤传输线路中的应用，对加大传输容量非常有效。
Fiber optical current differential protection is the main protections development trend of high and ultra high voltage transmission lines.
光纤电流差动保护是高压超高压线路主保护的发展趋势。
Abstract: the author describes the principles of optical fiber protection, protection of high voltage transmission lines, for reference.
摘要：本文作者介绍了光纤保护原理，对高压输电线路保护探讨进行了探讨，供同行参考。
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