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What are the advantages of DC transmission system over AC transmission system?

What are the advantages of DC transmission system over AC transmission system? Correct Answer All of the above

The advantages of DC transmission system over AC transmission system are:

1) DC system is economical for long line

2) DC needs only two wires of transmission, while a 3 phase AC may need up to 4 wires

3) The corona loss is absent in DC, while for AC it increases with its frequency

4) The skin effect is also observed in AC, leading to problems in transmission conductor designs

5) No inductive and capacitive losses

6) No proximity effect

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