Transmission Lines Are AC or DC?

is transmission lines is A.C or D.C supply?
mostly said that a.c supply has a better advantages than d.c when we consider the losses and efficiency aspects......but i also read about hvdc lines......in that topic d.c has a better advantages.......so i have a doubt about the topic.........sir,can u pls clarify the doubt?

dharaneesh

is transmission lines is A.C or D.C supply?

Good question; what do you think after reading the basics of electric transmissions?

mostly said that a.c supply has a better advantages than d.c when we consider the losses and efficiency aspects......but i also read about hvdc lines......in that topic d.c has a better advantages.......so i have a doubt about the topic.........sir,can u pls clarify the doubt?

transmission lines may be ac or dc according to their purpose. In some sectors AC transmission lines are used where as in some other DC are used. For long distances and high efficiency HVDC is preffered mostly.

tanq for clarifying!!!

hey guys can anyone tell me latest ppt topics on electrical and electronics............pls.....

dharaneesh

hey guys can anyone tell me latest ppt topics on electrical and electronics............pls.....

Search our project ideas and seminar topics section, please. You'll find several ideas for electrical engineering projects in it. If you don't find anything, tell us the ideas you'd like to work on or think are interesting and we'll get started from there.

there are mainly two channels used to transmit information,
transmission lines and other is waveguide..
normally upto 3 Ghz freqn. we use Tx lines and above this freqn. Waveguides(e.g. fiber optics,waveguide for uWaves) are used..