Dominant objects research of load model calibration in power system

Calibration Navigator (CN) of load model in power system is proposed in this paper, which is defined as the first-order sensitivity of system angle stability margin with respect to parameters of each load in system dominant mode. This navigator can help distinguish the dominant objects of the system in load model calibration, including dominant calibration areas and dominant calibration parameters. The distribution of dominant calibration area under different disturbances is analyzed with a two-machine system which has an ideal two clustering characteristic, where several load parameters are considered, and the factors influence the distribution are also studied. The result shows that the distribution of the dominant calibration area depends on the location of the disturbance and the active power of each load, the result is tested on IEEE 39-bus system and a real power grid.