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HVDC Homo polar links uses

  • HVDC Homo polar links uses two conductors of negative polarity.
  • HVDC homopolar links actually use a single conductor, not two conductors.
  • The single conductor used in homopolar links is either positive or negative, depending on the direction of the current flow.
  • The other pole is created by the Earth's magnetic field, which completes the circuit.
  • The magnetic field provides a low-impedance return path for the current, eliminating the need for a second conductor.
  • The use of a single conductor simplifies the design of the transmission system, reduces costs, and allows for longer transmission distances.
  • In HVDC systems, negative polarity is often preferred for homopolar links because it causes less radio interference due to corona.
  • When high voltage is applied to a conductor, the air around the conductor can ionize, creating a corona discharge that can produce radio interference.
  • Negative polarity reduces corona discharge, which helps to reduce the amount of radio interference.
  • Additionally, using negative polarity helps to protect the anode from corrosion and erosion caused by ionized particles produced by the corona discharge.