Identification of the synchronous machine parameters under magnetic saturated conditions using stand still frequency response test

Abstract

Exact and precise parameter identification and modeling of synchronous machines have been of great concern to the power system analyzers as well as to the control experts. In last decades the standstill frequency response (SSFR) test for determining synchronous machines parameters has gained much more importance among other test methods because of its simplicity, reliability and its harmlessness to the machines which are going to be tested. In this research work the SSFT has been applied to the micro synchronous machine under different excitation currents in order to examine the effect of the magnetic saturation upon machine parameters. A new approach has been introduced to eliminate the armature resistance from the identification process and this assures the exactness of the data and avoids excessive errors. The three transfer functions concept is used to enhance the accuracy of estimation.