A novel model validation methodology using synchrophasor measurements

• We propose a new methodology for model validation based on a new discrepancy indicator.
• We use events recorded from a synchrophasor measurement system.
• The Global Discrepancy Indicator (GDI) gives a measure of the quality of the model.
• The GDI sensitivities are used to identify a subset of problematic model parameters.
• The correlations between trajectories help to select the final subset for calibration.

The validation of simulation models is a crucial step in power system security analysis. In this paper, a new methodology is proposed to approach this problem, using events recorded by a synchrophasor measurement system. The method is based on the characteristics of a new discrepancy index, denoted here as Global Discrepancy Indicator (GDI), and trajectories correlation. The GDI gives a quantitative measure of the model discrepancy with respect to the real system. It allows for the integration of the three main parts of the validation process and permits the selection of the differences minimization interval in the calibration phase. In addition, a ranking of the GDI sensitivities is used to identify an initial subset of problematic model parameters. The correlations between trajectory differences and trajectory sensitivities aid in the selection of the final subset of candidates to problematic parameters for calibration. The extended Least Squares Estimation is then used to automatically tune the identified problematic parameters. The complete methodology was tested and has shown its capability to improve the models coherency.