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This paper presents a study of wide area agents based on communication for primary and backup coordinated protection. Agents are used to give each protection component control capacity as well as the ability to communicate with other agents. We feel that this method naturally points towards a new philosophy for primary and backup protection. Simulations are used to illustrate concepts, using a simulation engine named EPOCHS that combines the EMTDClPSCAD power simulator with the NS2 network communications simulator. Results illustrate the improved performance of our protection scheme, In this new protection system, agents were embedded in each of the conventional protection components to construct an IED relay (Intelligent Electronic Device). The agent searches for relevant information by communicating with other agents, Agent communications can take place at the same substation or at remote substations. This information can be used to detect primary and remote faults, relay misoperation, breaker failures, and to compensate such problems with much better performance than that can be done in traditional schemes. Preliminary results give us hope that the proposed protection scheme may be able to contribute towards the mitigation of wide-area disturbances and the power blackouts that frequently follow them. Index

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