Case studies and lesson learnt on Mis-operation of Power Line Carrier Communication (PLCC) & Digital Protection Coupler (DTPC) in EHV transmission lines.

Power Line Carrier Communication (PLCC) and Digital Tele-Protection Couplers (DTPC) are key technologies being used in communication-based power system protection schemes. These communication methods play a vital role in transmitting control and protection signals between protective relays to ensure fault identification inside the specific zone. Both PLCC & DTPC have been deployed in all EHV lines along with the line protection across POWERGRID network.