TY - JOUR N2 - The paper introduces a comprehensive investigation in end winding inductances of large two-pole turbo-generators. With the aid of an analytic-numeric approach, where Neumann's formula is applied, the influence of geometric characteristics of double-layer stator end windings with involute shape is analysed. This parameter study results in approximation formulas for the stator self and mutual inductances at stand level as well as for the common used end winding leakage inductance. In order to consider field affecting components as pressure plate, flux shield, rotor shaft and rotor retaining ring, finite elements models for two machines (250 MVA and 1150 MVA) are created and computed. The results are integrated in the developed approximation formulas. Finally the simulation results of machine 1 are compared to the data of two different measurements. All approaches introduced in this paper show good correlation. The high speed of the analytic-numeric calculation is combined with the accuracy and opportunity to consider field affecting components within the extensive finite element computation successfully. L1 - http://www.czasopisma.pan.pl/Content/84648/PDF/06_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/84648 PY - 2012 IS - No 2 June EP - 210 DO - 10.2478/v10171-012-0017-z KW - turbogenerator KW - end winding inductances KW - end winding leakage inductance A1 - Freese, Michael A1 - Kulig, Stefan PB - Polish Academy of Sciences VL - vol. 61 DA - 2012 T1 - Influence of constructional turbo-generator end region design on end winding inductances SP - 199 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/84648 T2 - Archives of Electrical Engineering ER -