Plc Communication In Smart Meters: Technological Evolution From Narrowband And Broadband To Dual-mode

Power line carrier communication uses the existing power grid as a data transmission medium, enabling information exchange between single phase smart meter and the power company's control center. This method eliminates the need for additional wiring, effectively solving the problem of signal penetration through buildings.

Narrowband Foundation and Broadband Breakthrough

Early wifi smart energy meter devices used narrowband PLC technology, operating at lower frequencies and limiting data transmission rates. Since 2017, high-speed power line carrier communication has gradually become mainstream, with communication rates exceeding 1 Mbps. The introduction of orthogonal frequency division multiplexing (OFDM) modulation technology allows for accurate signal transmission even in noisy environments.

Dual-Mode Fusion and Network Topology Reconstruction

Power line channels have inherent limitations; carrier communication is paralyzed when power is lost. Dual-mode communication technology, integrating HPLC and high-speed low-power wireless, has emerged, enabling mutual routing backup for the two channels. The dual-mode unit supports more network nodes and can connect to devices such as 3 phase energy meter wifi and distributed photovoltaic inverters. In power outage scenarios, the wireless channel can still accurately report meter events.