HVDC

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Advantages and Disadvantages of High Voltage Direct Current

The advantages of the high voltage direct current transmission are

  • Current charging is absent
  • No proximity and No skin effect
  • No stability problem
  • Due to reduced dielectric losses, the current carrying capacity of HVDC cable is large
  • Compared to AC transmission the radio interference and the corona power loss are less
  • Less insulating devices are required
  • compared to AC the switching surges are lower in DC
  • There are no Ferranti effects
  • Voltage regulation

The disadvantages of the high voltage direct current transmission are

  • Expensive
  • Complex
  • Power faults
  • Causes radio noise
  • Difficult grounding
  • Installation cost is high

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