Ultra-high voltage transmission line will be the main frame of power network in China.

交流特高压输电线路是我国未来统一电网的骨架。

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Voltage sags due to line faults, transformer energizing and induction motor starting are main interference sources.

输配电线路故障、变压器投运、感应电动机启动是引起电压凹陷的主要原因。

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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 fell onto the main north-south high voltage power transmission line.

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