Method and system for detecting noise in an electrical grid

A system for detecting a source of noise in an electrical grid distributing network implementing Power Line Communications, said electrical grid comprising a plurality of meters respectively connected to a plurality of enduser networks, wherein said source of noise to be detected is originated in a device belonging to one of said enduser networks, wherein each of said meters is connected to at least one pair of cables corresponding to at least one phase of the 3 phases of the electrical grid, said at least one pair of cables comprising a first cable belonging to said distributing network and a second cable belonging to a corresponding enduser network, the system comprising:

• the system being characterized in that each of said meters comprises
• an element behaving as a resistive element within the frequency band of the PLC, and behaving as a nonresistive element at the frequency of the electrical grid, said element being disposed between said first cable belonging to the distributing network and said second cable belonging to the enduser network;
• and
• the system comprising means for measuring, at each meter, the difference in electric potential between the two ends (A, B) of each element disposed between said first cable belonging to the distributing network and said second cable belonging to the enduser network and for determining, from said at least one measurement, whether a device belonging to the enduser network and connected to said meter is causing a noise disturbance or not.