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Anonymous
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Asked: 2020-12-19T10:48:40+00:00 In:

What are the advantages and disadvantages of DC transmission system?

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The bulk of electrical power in DC transmission is transmitted over long distances. DC operates by applying a constant voltage from which most of the system takes a constant electric current. Batteries which are widely accepted source of direct current and the majority of modern electronics needs direct current to operate.

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    1. Yabtir Ahor
      Level 2
      This answer was edited.

      There are some advantages and disadvantages of AC and DC transmission system. In the past, DC was used for electrical power transmission.

      Advantages of DC transmission:

      • In DC transmission, the power distribution is achieved with the support of two conductors.
      • No problem of phase displacement, inductance and capacitance in DC transmission system.
      • The corona losses and voltage drop in DC transmission are low as compared to AC transmission.
      • DC transmission lines have no skin effect on the conductors, and as a result, the conductor small cross-section area is usually used to influence the material saving directly.
      • In DC lines, there are no issue of system instability and also no difficulty in synchronizing.
      • No overlapping with other communication lines and system exists in the DC network.

      Disadvantages of DC transmission: 

      • In DC transmission, it isn’t easy to produce high voltage. Also, the transformer cannot be used to step-up or step-down DC voltages.
      • Due to the communication issue, the generation at high DC voltage is complicated and cannot be used usefully at user ends.
      • The DC transmission line is more complicated and costly as compared to the AC transmission system.
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