CALCULATION OF FORCES ON THE STATOR END WINDINGS OF TURBOGENERATOR BYTHE TRANSIENT QUASI-3D METHOD

Lorentz formula is applied here to calculate the electromagnetic force s acting on the stator end windings of a turbogenerator within the fir st several periods after it is suddenly short circuited, based on the magnetic field computed by the transient quasi-3D method (TQM). The pr inciple of TQM and its essence-processing of winding currents-have bee n disussed. In the example, the forces acting on the stator end windin gs of a 35MW turbogenerator have been computed, when it is under no-lo ad three phase, no-load line-to-line and no-load line-to-neutral sudde n short circuit conditions. Some useful results are obtained.