A model parameter correction method based on measured trajectory

The validity of digital simulation is with vital importance to the security analysis and planning of power systems. Currently, it is very difficult to determine the erroneous simulation parameters that cause the mismatch of simulation output and measured trajectories. In this paper, a power system dividing and trajectory sensitivity based method is proposed to find the erroneous parameters. First, the power system is divided into several subsystems, and the recorded data is used as the equivalent input to the interested subsystem. Then the relative important parameters that influent the interested subsystem can be selected by trajectory sensitivity analysis, and by tuning the selected parameters the simulation output can match the measured trajectories. New England 10-Generator and 39-Bus System studies show the validity and simplicity of the proposed method.