Parameter Identification Method Based on LagrangeMultiplier and Measuring Residual Error

doi:10.16182/j.issn1004731x.joss.201712004

Abstract

Abstract: To satisfy the security and stability control, transient and steady state analysis of power system, it is necessary to ensure the accuracy of the estimated parameters. A method of parameter identification in power system based on Lagrange multiplier and measurement method of residualis proposed through analysis of measurement residuals. A two-step approach for parameter identification is introduced. Based on Lagrange multiplier method, using thestandardized Lagrange multiplier corresponding to the parameter error the parameters with errors can be judged by the size relative to the threshold and can bedetected and identified automatically. The residual vector of measurement redundancy is used to estimate the errors of the network parameters, which is based on the deviation component formed in the course of decoupling matrix of measurement residual errors of the measurement equation. The simulation on IEEE 14 bus system proves that the algorithm is correct and effective.

Key words: power system network, Lagrange multiplier, measuring residual error, parameter identification, state estimation

CLC Number:

TM315

He Zhi, Nie Zhicheng, Qin Yining, Fan Youping. Parameter Identification Method Based on LagrangeMultiplier and Measuring Residual Error[J]. Journal of System Simulation, 2017, 29(12): 2964-2971.

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