The Harmonic Assessment Method Based on the Generalized Ridge Regression

This article will use the generalized ridge regression in system harmonic impedance analysis and the harmonic evaluation. Based on the equivalent circuit of the system, users can obtain system harmonic impedance, the background harmonic and common connection point, the analytical expression of the harmonic. Using the harmonic voltage and current data which will be got in the common connection point, people can use system harmonic impedance and background harmonic as the regression coefficients of generalized ridge regression. Using direct method can obtain estimation parameters of the generalized ridge regression, and calculates the harmonic emission levels. The method can overcome the influence caused by the abnormal data to Regression coefficient, it is better than the partial least squares method and its ridge estimators have better robustness. The simulation results prove the effectiveness of this method and accuracy.