The first application of 1 500 MVA transformer in 500 kV load-center substation is introduced in this paper. Based on the analysis of the power distribution equipment at all levels with the increasing substation capacity, the application of new technology and new equipments, such as high-impendance transformer，220 kV equipment with large capacity and 66 kV large-capacity capacitor bank etc, are presented, providing references for the related technicians.