Parameters Identification and Estimation in Power System Based on Lagrange Multiplier and Variable Step Integration Algorithm

Abstract—The parameter errors of power network can lead significantly deteriorate state estimation results in power system.In this paper, identification of suspicious parameters based on Lagrange multiplier is analyzed firstly. Then, a method of distinguishing the suspicious branch sets is proposed. Finally, the variable step integration algorithm is used to estimate the identified suspicious parameters. The proposed method has been deployed in several provincial power control centers to estimate the identified suspicious parameters. The experimental results illustrate the effectiveness of the proposed algorithm.