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in HVDC transmission system ,monopolar link has one conductor usually a negative polarity and use ground or sea return ?through negative polarity we could pass electricity or not yes means how it is possible
1 Electrical Engineering 12505what is the reason for connecting hvdc monopolar line with negative conductors
Electrical Engineering 1863
Answers / { shinyjasmine }
Question { 47042 }
what is skin effect? why is it absentin dc system
Answer
surface of the conductor is called skin effect.
The apparant resistance of AC is always higher than
DC .The alternating magnetic flux created by an ac current
interact with the conductor , generating a back emf which
tend to reduce the current in the conductor . The center
portion of the conductor is affected by the greatest
number of lines of force.The electromotive force produce in
this way by self inductance varies both in magnitude and
phase througr the cross section of the conductor, being
larger towards the centre and smaller towards the outer .so
the flow of current is maximum in the outer surface of the
conductor ,called as skin effect
In dC there is no inductance an dno skin effect.
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