DETERMINATION OF THE COMMUTATION INDUCTIVE REACTANCE OF SYNCHRONOUS ELECTRICAL MACHINES WITH A HARMONIC EXCITATION SYSTEM

The paper considers a synchronous machine excited by the energy of mag netic field harmonics. Analysis of a mathematical model of a harmonic excitation system has been carried out with the use of such concepts a s ''undistorted e.m.f.'' and ''commutation inductive reactance'', It i s shown that, when the generator considered operates in parallel with an electrical network, such a model can be used for calculating its st eady-state conditions. Under transients the model becomes incorrect. W hen the generator operates with an autonomous load it is necessary to calculate the commutation inductive reactance with allowance for the l oad resistance. (C) 1998 Elsevier Science Ltd. All rights reserved.