Communication method and system

摘要

Exemplary embodiments increase reliability of communication over a non-deterministic communication channel, in electric power systems. A communication channel is monitored based on regular network traffic, by evaluating messages or data packets carrying real-time operational data as a payload. A permanent determination of a channel quality, including appropriate alarming in case the channel quality is found insufficient, is based on an evaluation, at a receiving node, of data packets continually transmitted by a sending node. These continually or repeatedly transmitted data packets can include identical payloads reflecting current states rather than state changes as operational data.

主权项

1. A method of communicating between a first communication node at a first site and a second communication node at a second site, wherein the first communication node is adapted to receive a protection command as an input signal from a relay connected to the first node, the method comprising:
sending, by the first communication node, a message including operational data over a communication channel to the second communication node, and monitoring a channel quality of the communication channel based on the message; sending continually, by the first communication node, data packets including operational data over a non-deterministic communication channel including a packet-switched network to the second communication node; verifying, by the second communication node, whether data packets with an expected type of payload are received; monitoring, by the second communication node and based on said data packets, the channel quality; and increasing, as soon as the input signal from the relay is received, a repetition rate of the continually sent data packets.