Direct current model parameter checking method and system based on trajectory sensitivity

The invention discloses a direct current model parameter checking method and system based on trajectory sensitivity. The method comprises the following steps: acquiring direct current model parameters and actually measured data; calculating trajectory sensitivity according to the direct current model parameters, selecting direct current system observed quantity, determining the trajectory sensitivity corresponding to the direct current system observed quantity, and screening to-be-checked parameters according to the trajectory sensitivity corresponding to the direct current system observed quantity; selecting different checking methods, checking the to-be-checked parameters, adopting the checked parameters to carry out simulation calculation of a direct current model, comparing the checked parameters with actually measured data, carrying out error analysis, and determining final parameters meeting error requirements. The checking process is simple, high in accuracy and easy to implement, the problem that erro