So a new technique called
power line carrier was introduced, this is used for the
communication to take place over the same power lines which
deliver electricity. In this technique, high frequency AC carrier
is used on to the power line with the help of modulating carrier
and the information about its data, manipulating from the
remote’s meter or central station. Many years of researches
have not overcome this problem that precludes this being a cost
effective solution over the primary transmission lines. This
method is used only for the short distance like from a
consumer’s meter to a pole. It is not the economic system to
pass through a distribution transformers on to the primary lines
and their results communication is very slow. Due to the
narrow bandwidth, synchronizing the data or control signals is
not possible easily.