IDENTIFICATION OF SYNCHRONOUS MACHINE LINEAR PARAMETERS FROM STANDSTILL STEP VOLTAGE INPUT DATA

This paper presents the results of a time-domain identification proced ure to estimate the linear parameters of a 15kVA salient-pole synchron ous machine at standstill. A step voltage Input test is performed, and the parameters of the time constant models and equivalent circuit mod el are estimated. The Maximum Likelihood algorithm is used for the est imation, and the best-fit model is selected from a set of increasing o rder models. The initialization values for the parameters to be estima ted are determined from the operational inductances derived directly f rom tie measured time domain data. The simulated equivalent circuit mo del response is validated against the measured standstill lime domain and frequency domain data. In addition, simulation of the model respon se to an on-line small disturbance test is compared to the measured dy namic response.