ABSTRACT
The instantaneous knowledge of the electrical parameters of an Induction Machine is useful in the power system analysis. The on-line estimation of the electrical parameters of the machine could be helpful for the computation of the contribution of the motor to the short-circuit currents. The electrical parameters of the machine, in rated working conditions, are usually measured with off-line methodologies at standstill. If the parameters of the machine vary while the corresponding values assigned to the flux models are kept constant, the so-called detuning of the flux model occurs. The detuning of the flux model significantly modifies the performance of the electric drive and can even lead up to its instability. As in the case of the current flux model, it is possible to make an analysis of the sensitivity of the “voltage flux model” versus the variation of the parameters of the machine.
