Medium Voltage Network PLC Modeling and Signal Propagation Analysis

PLC technology applications in medium voltage (MV) distribution networks are mainly related to the monitoring, control and metering applications. The CENELEC A band provides adequate transfer rate for such narrow band PLC applications. Scope of this paper is to present simulation results concerning NPL signalling on MV distribution networks. Cases of underground cables, overhead lines and distribution transformers are examined. All simulations have been done using the Electromagnetic Transients Program (ATP-EMTP). Results seem to be consistent with transmission line theory and modal wave propagation, showing standing wave signal voltage profiles along the lines. The case of an aerial MV distribution network is also examined for different frequencies and loading conditions, including open-ended lines, transformers, compensation capacitors and combinations of them.