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AC vs DC Transmission line | Types of Transmission lines | Transmission line Characteristics | Transmission line

 In this article, we both understand what basically a transmission line is, types of transmission, and more.



What is a transmission line?

 A transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. 

                                                                             or

A system of structures, wires, insulators, and associated hardware that carry electric energy from one point to another in an electric power system.

Types of transmission lines?

According to the power supply which is transferred from one place to another place 

1. AC Transmission Line :

  • the ac transmission line transmits the alternating current over a long distance
  • the ac transmission line uses three conductors for long power transmission 
  •  ac transmission line has inductance and surges 
  • the high voltage drop occurs across the ac terminal lines when their end terminal voltage is equal. 
  • the phenomenon of the skin effect occurs only in the ac transmission line.
  •  communication line interference is more in the ac transmission
  • the corona effect is (ionization occurs across the conductor ) and this ionization causes the losses in the conductor
  • the dielectric loss occurs in the ac transmission line
  • the ac transmission line has difficulties of synchronization and stability
  •  ac transmission line is less expensive as compared to the dc transmission line.
  • the small conductor is used for ac power transmission


2. DC Transmission line :

  •  the dc transmission line is used for transmitting the dc over a long distance.
  • the dc transmission line uses two conductors for power transmission.
  • the dc transmission line is free from inductance and surges. 
  •  the dc transmission line is free from inductance, and hence no voltage drop occurs across the line.
  • the skin effect causes the losses, and this can be reduced by decreasing the cross-section area of the conductor. the phenomenon of skin effect is completely absent in the dc transmission line.
  • At the same voltage, the dc transmission line has less stress as compared to the ac transmission line. hence, dc requires less insulation as compared to ac.
  • the line as compared to the dc transmission line.
  • the corona effect occurs only in the ac transmission line and not in the dc transmission line
  • Dielectric loss is not in the dc transmission line.
  • the dc transmission line is free from stability and synchronization
  • A large conductor is used for dc transmission.



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