The "third-category" method and multi-agent system theory in power system applications

This paper discusses issues on how multi-agent system theory can be fitted into the framework of the proposed third-category power control method. An example of the third-category control implemented by a setting up multi-agent system to enhance power system voltage stability is demonstrated. To maintain stable operation of a power system, we have conventional means of preventive control and emergency control. When the power system is losing the stability, on-line control is still needed to maintain continuous operation of separated parts of power system to prevent the whole system from collapsing and to minimize the cost of black start. Implementation of such on-line control after emergency control fails can be called "post-emergency" control. This paper demonstrates the great potential of applying the third-category control method and multi-agent system for the post-emergency control, that shows the necessity and importance of the post-emergency control to minimize system loses.