Many transmission and distribution lines built today do have some sort of fiber link installed. However, it is used for protective relaying (tripping breakers, etc. for a fault on the line). Some also have power line carrier (PLC) equipment for the relaying. PLC has wave traps on either end of the line, along with carrier equipment. Wave traps are essentially RLC networks to filter out the signal tranposed on the line from reaching the rest of the adjacent lines.
So it will most likely never be put on a distribution or transmission line, just way too complicated.
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Sure it would--digital doesn't necessarily mean electronic. There used to be the odometer and "flip" type digital clocks.
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Many transmission and distribution lines built today do have some sort of fiber link installed. However, it is used for protective relaying (tripping breakers, etc. for a fault on the line). Some also have power line carrier (PLC) equipment for the relaying. PLC has wave traps on either end of the line, along with carrier equipment. Wave traps are essentially RLC networks to filter out the signal tranposed on the line from reaching the rest of the adjacent lines.
So it will most likely never be put on a distribution or transmission line, just way too complicated.