An overview of a niche and unique physical layer utilizing recent powerline communication (PLC), G3-PLC specification to help realize smart grid technology is presented. The specification uses OFDM for data transmission and is primarily intended to operate in the low-frequency band, from 35.9 kHz to 90.6 kHz which is under consideration to be adapted in ITU and IEEE P1901.1 as global standard for powerline communication. Simulation results are presented showing the expected performance of a typical G3-PLC-compliant modem when operating in a powerline channel, followed by field trial results showing performance of several G3-PLC modems operating on actual MV and LV powerline channels. Results show performance of modems from opposite sides of a 20kV – 220V transformer interfacing Medium Voltage powerline to an Low Voltage power line. It is intended to repeat these trials as part of ongoing research in Europe and in particular UK from September 2011.
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