Relay Protection for Multi-terminal Lines Based on Multi-agent Technology

The MAS relaying system was consisted of organization agent, coordination agent and execution agent. Their mutual communication was realized by optical-fiber network in substations, they can change each others protection trip information real-time, so they could decide exactly trip action by these rich information. Simulation results indicate that, the relaying system having the advantage of instantaneous operation of the whole line, compared to current protection and distance protection; and having the advantage of economizing the channel investment, compared to pilot relaying. The project was feasible and could be served as the main protection of diverse voltage grades