Concurrent outbound communications in a TWACS
View Patent ↗An improvement in a Two Way Automated Communications System (TWACS) requires only three of six previously required vectors to communicate with remote communication equipment (RCE) devices installed in the three phases of a utility's low voltage distribution network for concurrent outbound signal communications over the TWACS. The reduction in vectors allows an outbound injection silicon-controlled rectifier (SCR) array used for such purposes to be greatly simplified and further allows the SCRs in the array to be operated independently, and therefore concurrently.
1. In a two-way automated communications system (TWACS), a method of efficiently affecting concurrent outbound signal communications on all phases of a three power distribution network of a utility comprising:
generating an outbound communication signal to be transmitted on each phase of the power distribution network from a utility location to receiving sites located within the network;
simultaneously injecting the outbound communication signal on all the network phases for the outbound signal to be concurrently sent to each site, receiving equipment at each site receiving the outbound signal on each of the three phases and in response thereto, generating an inbound signal which is transmitted back to the utility location;
at the utility location, evaluating each inbound signal received from the receiving site of each phase and determining which phase resulted in the best inbound communication from that site, and,
subsequently concurrently transmitting outbound communication signals to the receiving sites on the particular phase for each respective site that exhibited the best signal reception for that site; and,
in which only three phase vectors rather than six phase vectors are used for communications between the utility location and the receiving site thereby enabling silicon-controlled-rectifiers (SCR) employed in an array thereof to be operated independently of each other so to affect concurrent outbound signal transmission over the network, the three vectors used being phase-to-neutral vectors and not phase-to-phase vectors.
2. The method of claim 1 in which outbound communications signal are generated at the utility location and transmitted to the receiving sites with the return inbound signals being transmitted from the receiving sites back to the utility location on a low voltage side of the power distribution network by which an amplitude of the signals injected into the network to produce adequate signals for communications is reduced.
3. The method of claim 1 in which injected concurrent outbound signals are interleaved on the three phases by 120°.
4. The method of claim 1 in which each receiving site includes receiving communications equipment connected to each phase of the distribution network so to receive outbound communications signals and transmit inbound communications signals on all phases of the network.
5. The method of claim 1 by which affecting concurrent outbound message signaling on all phases of the network simultaneously speeds up communications between the utility location and receiving cites by a factor of three.