ONLINE EVALUATION OF A ROUND ROTOR SYNCHRONOUS MACHINE PARAMETER SET ESTIMATED FROM STANDSTILL TIME-DOMAIN DATA

This paper presents a method for identifying the best linear circuit m odel parameters of a three-phase, round rotor synchronous machine. Sta ndstill time-domain test data and the Maximum Likelihood estimator are used to identify the values for the equivalent circuit models. The es timated models are validated against the standstill data and an on-lin e test. A steady state error adjustment procedure is introduced and th e results are analyzed. The final d- and q-axis model selections are b ased on the minimization of the cost function, the concept of parsimon y, and how well the models predict the on-line dynamics of the machine . Issues related to the necessity of the L-f1d differential leakage in ductance [1] and the necessity of the Z(fe) eddy current branch are al so discussed.