Inspec keywords: regression analysis; phasor measurement; power transmission lines; least squares approximations

Other keywords: three-phase transmission lines; nonlinear parameter estimation problem; least squares technique; zero sequence parameters; synchrophasor measurements; positive sequence line parameter; mutually coupled transmission lines; linear least squares; zero sequence parameter estimation; transmission line; synchrophasor data

Subjects: Interpolation and function approximation (numerical analysis); Other topics in statistics; Power transmission lines and cables; Power system measurement and metering