Abstract: : the substation is in power system voltage conversion, accept and electric power distribution, control and adjustment to the current voltage power facilities.

摘要：变电站是电力系统中转换电压、接受和分配电能、控制电流走向和调整电压的电力设施。

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The current lags behind the voltage.

电流滞后于电压。

《新英汉大辞典》

Their job is to convert high-voltage alternating current from the mains into low-voltage direct current for mobile phones, laptops, iPods and other electronic gadgets.

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Large-scale electricity transmission usually uses alternating current, in which both current and voltage oscillate.

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For example, a system could be injected with current and voltage to see how it would react.

CENTERFORSECURITYPOLICY: Center For Security Policy