In the initial period of power system restoration, in order to study the effect of the capacity and the sequence of loads that should be picked up to the restoration, fluctuation of load caused by the actual picked up load capacity and the important degree of load as well as numbers of switches between loads and black-start unit were considered, and the methods of differences and projections were used to order loads. Based on the results, a mathematical model was developed.A integrated optimal and feasible restoration program was obtained in the initial period of power system restoration. The effectiveness and practicality of the method were demonstrated by computer simulation performed on an actual restoration system in Sichuan Province in China.
