is it possible to transfer electricity by not using transmission line?
Jitendra,
There was once a project on "Space Power" on which I recall some articles in IEEE magazines (probably the IEEE Aerospace and Electronic Systems Magazine), but haven't seen much on it thereafter ! Probably a shelved idea ?
At that time there was talk of very expensive transmitters and receivers - which was certainly very discouraging.
You can do some search in IEEE Digital Library, if interested.
-Sanjay
Respected Roy sir , I have made search on IEEE explorer but did not get sufficient things ,thanks for your valuable answer , actually u was thinking to make a IEEE 6 bus model that will operate without transmission line ..
No, that would be too much to expect. The "Space Power" articles that I am talking about were of a specific type. I will list out the details I had read at that time, so that it will be easier to track:
The advantage being stated was that the generation being in space, there is zero risk of nuclear radiations or disaster to earth.
The articles were in the very first few issues of the IEEE A&ESM.
-Sanjay
The problem is transmitter inefficiency followed by path loss then receiver inefficiency. Path loss might be over 99% (that is, you only receive 1% of the transmitted power.)
Jitendra,
Basically one can transmit the electrical power by the travelling electromagnetic waves and by the metallic conductors. The transfer of electricity in conductors is confined within the conductors themselves. Which is a necessary condition to preserve the transmitted power from spreading and going lost.
In case of electromagnetic waves transmission, the waves spread as they travel in a larger cross section area making their collection impossible as Tony hinted.
This is in free space transmission. But one cam use wave guides which are Hollow metallic cylinders. Or one can use laser to transmit electrical power.
In the case of guided electromagnetic wave transmission converters must be used to convert electric power to radiation and vice verse. This is normally not cost effective and also to some extent lossy. or very lossy.
The other effect is the required high radiation intensity that may affect the environment and also on the lifer of the birds that may cut the path of such high intensity radiation.
I think one has thought the existing power system to make it efficient and economical and safe. Electricity transmission is a branch of the electrical power engineering since long time.
Best wishes
Professor Sarma in my university was doing research on this using a leaser beam.