A new practical and robust methodology to estimate parameters of synchronous generators is proposed in this paper. The proposed methodology is based on trajectory sensitivity analysis combined with a new approach termed 'minimization approach' to estimate parameters of nonlinear dynamical systems modeled by a set of differential-algebraic equations. A suitable choice of inputs and outputs allows the division of the estimation of generator parameters into the independent estimation of mechanical and electrical parameters. The methodology is robust with respect to initial parameter guesses and it does not require special tests, but uses disturbance data (3-ϕ currents and voltages, field voltage and mechanical rotor speed measurements) collected from the electric power system without disconnecting the generator from the grid.
Parameter estimation; synchronous generator; trajectory sensitivity
