Methodology development for estimation of armature circuit and field winding parameters of large utility generators

This paper presents a methodology to estimate armature circuit and field wi nding parameters of large utility generators using the synthetic data obtai ned by the machine natural abe frame of reference simulation. First, a one- machine infinite bus system including the machine and its excitation system is simulated in abe frame of reference by using parameters provided by the machine manufacturer. A proper data set required for estimation is collect ed by perturbing the field side of the machine in small amounts. The recurs ive maximum likelihood (RML) estimation technique is employed for the ident ification of armature circuit parameters. Subsequently, based on the estima tes of armature circuit parameters, the field winding and some damper param eters are estimated using an Output Error Estimation (OEM) technique. For e ach estimation case, the estimation performance is also validated with nois e corrupted measurements. Even in case of remarkable noise corruption, the agreement between estimated and actual parameters is quite satisfactory.