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Albertini, M. R. M. C. Methodology for off-line validation of transmission line parameters via several measurement snapshots. Tese (Doctoral)Departamento de Engenharia Elétrica da Escola de Engenharia de São Carlos, Universidade de São Paulo, São Carlos, 2010. A practical and efficient off-line approach to detect, identify and correct series and shunt branch parameter errors is proposed in this thesis. The branches suspected of having parameter errors are identified by means of the Suspicious Index (SI). The SI of a branch is the ratio between the number of measurements incident to that branch, whose normalized residuals are larger than one specified threshold value, and the total number of measurements incident to that branch. Using several measurement snapshots, the suspicious parameters are sequentially estimated, via an augmented state and parameter estimator which increases the V-θ state vector for the inclusion of suspicious parameters. Several simulation results (with IEEE 14, 30 and 57 bus systems) have demonstrated the high accuracy and reliability of the proposed approach to deal with single and multiple parameter errors in adjacent and non-adjacent branches, as well as in parallel transmission lines with series compensation. The proposed approach is confirmed by tests performed in two subsystems of the Hydro-Québec Trans-Énergie.

Metodologia para depuração off-line de parâmetros série e shunt de linhas de transmissão através de diversas amostras de medidas