Optimal Thevenin equivalent parameter calculation method based on node port volt-ampere characteristics

The invention discloses an optimal Thevenin equivalent parameter calculation method based on node port volt-ampere characteristics. The optimal Thevenin equivalent parameter calculation method is an identification method for calculating an optimal Thevenin equivalent parameter based on the minimum volt-ampere characteristic deviation of a node port. The optimization target is that the deviation between a voltage vector calculated by a sample point current vector through Thevenin equivalent parameters and a voltage vector of a sample point is minimum. The state quantity of the sample points onthe volt-ampere characteristics of the node ports is calculated through a sensitivity method, the parameter calculation process is optimized according to the characteristics of the sample point generation process, and the calculation speed is increased; and optimal Thevenin equivalent parameters of the node ports are obtained through optimization solution according to the objective function. The problem that due to nonlin