CALCULATION OF INTERTURN VOLTAGES IN MACHINE WINDINGS DURING SWITCHING TRANSIENTS MEASURED ON TERMINALS

This paper describes a technique for calculating interturn voltages in machine windings during transient conditions. The technique is based on the measurement of switching transients at the machine terminals an d computer simulation of the surge travelling through the winding. The machine winding is treated as a multiconductor transmission line and the Discrete Fourier Transform and convolution techniques are used for calculating the switching transient distribution along the winding. S witching transients results obtained on two electrical motors in the M anzanillo II power plant are used in the analysis.