How can we have telecommunication over 132 kV transmission line using plc at both ends?
Answer:
are you referring to the fact that they have realised that the national grid runs up and down the country so all that had to do was string a communication wire on the earth wire which is dead so no interference .they can tap in at any pylon and bring it back down to earth and reconnect it to the land line .
One way is to run a fibre optic cable along the top - above the 3 AC Hi voltage pairs. There could be many optical connections in a small bundle. At strategic points, these bundles drop down into a local interface for spreading out as electronic signals. i.e. broadband.
I would not expect to see simple PLCs connected to this. They are far too simple and low-tech. But its not impossible.
If you are spending a lot of $$$$ installing a 132kV connection, you might as well have a good data network - the cost is trivial compared to the costs of installing pylons or trenching the power cable.
You could use a simple PLC system connected on a 110V/230V AC system where an RF modulation is superimposed on the AC. An alternative is multi-drop modems. Its a bit like the old 10-base-2 network system.
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