Experimental Research on EMI of PLC System of ± 500-kV HVDC Converter Station

The power line carrier (PLC) system used in HVDC converter station is connected directly to the primary system via coupling devices, and may be interfered by the electromagnetic noise produced by valves or switch operation procedure. In this paper, the EM noise in PLC system of plusmn500-kV HVDC converter station is measured in the steady state. The transient disturbance during the switch operation procedure appearing in PLC system is also taken into account in this paper. The characteristics of EMI in PLC system are analyzed based on the experimental results