Application of expert system to power system restoration in local control center

A method of restoration in power systems is developed by using sensitivity analysis. Heuristic rules are used in the plan to restore the blackout area that is recognized by the network topology and on/off status of switches (circuit breakers, line switches). The rules are categorized as flow-control rules, energization rules and line switching rules. A set of network switching changes not only the network topology but also the state of power systems. The switching for alleviating overloads is determined by analyzing the line power variations using sensitivities with respect to line switching and load shedding. This paper deals with each feeder power in a substation as a unit power, so the sum of load shedding can be reduced by the methodology proposed in this study. The representation of the power system components has hierarchical data structures for the real time recognition of network topology.