Available transfer capability evaluation based on extended blind number

In view of the uncertainties in off-line available transfer capability (ATC) evaluation, a method based on blind number was proposed. The study on ATC offers important reference information for secure operation of power system, decision-making of power market participants, system planning and so on. The representation of ATC will be more accurate with full consideration of uncertainties. Blind number is able to comprehensively express various types of uncertainties, and in this paper, the content of blind number is theoretically extended with the provision of probability density information. With the OPF based ATC model, the optimization algorithm based on the expanded blind number theory is detailed and the effectiveness of the approach is justified by the IEEE 30-bus system.