Improving Control Ability of Relay Protection System with Intelligent Agents

The complexity of power distribution grid has been highly increased with the extended scale of power systems over the past ten years. The capability of a power transmission system is evaluated by some factors involving stability, reliability and sensitivity. In order to enhance the performance of the power transmission system, a more credible automation approach regarding these vital elements is required. Considering the indispensable character of the relay protection in the power transmission system, this paper proposes an agent-based control approach for relay protection system. With an ontology repository, our approach takes a much shorter reaction time in the backup relay protection and isolates the fault points with the minimal isolation zone.