Why Is Alternating Current Preferred for Long-Distance Power Transmission?

Jadaav · Sep 23, 2012

Why is an alternating current used for long distance transmission of electrical power ?

What about direct current ?

Emilyjoint · Sep 23, 2012

It is because transformers can be used to transform AC voltage to high voltage to reduce power loss in connecting cables. High voltage means less current for the same power and therefore with highg voltage I^2r losses are reduced.
Transformers can then be used to step down the high voltage to safer values for domestic use.

mathman · Sep 23, 2012

http://en.wikipedia.org/wiki/Electric_power_transmission#High-voltage_direct_current

Above describes the use of direct current in long distance.

Why Is Alternating Current Preferred for Long-Distance Power Transmission?

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Why Is Alternating Current Preferred for Long-Distance Power Transmission?

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