TWACS™, A New Viable Two-Way Automatic Communication System for Distribution Networks. Part II: Inbound Communication

A new concept of two-way automatic communication for distribution systems, henceforth abbreviated as TWACS™, is introduced in this paper. This paper restricts itself to the discussion of inbound signalling from the, remote transponder units at the customer´s premises to, the receiver located at the substation. Inbound signalling uses current pulses, precisely generated and limited to only a small segment of a half cycle of the 60 Hz wave. The inbound signal is detected in the neutral or phase bus conductor at the substation. Bit coding, multi-channel assignment, detection algorithms and propagation characteristics are explained and discussed and the paper concludes with field results obtained at many different utilities.