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Q.

For long distance transmission line which one is useful HVDC or HVAC ?

Tags: long distance, computers & internet, hvac
Asked by Vilas Deshpande, 03 Dec '10 05:07 pm
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Answers (2)

1.

HVDC ( less losses)
Answered by satejkhadse, 03 Dec '10 05:09 pm

 
  
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2.

AC always , The main reason is inudction effect can be used to step up and step down the Voltage.

As you know heat losses are proportional to square of current that is I^2 * R .
And Power = VI so suppose it the transmission is done at normal 220V DC then current will be very high and resulting losses will be also very high . The transmission system need to have thick cables of low resistance.

In case of AC the voltage is stepped up to 32 KV or 64 KV for main grid , So the current flow is less and thus resulting losses are less. At the distribution point another transformer is employed ( Sub-station) to step down the volatge before it is supplied to homes.
Answered by Batao Na, 03 Dec '10 05:13 pm

 
  
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