0011-4561 The modernization of turbogenerators as a method of decreasing electrical energy production costs The modernization of turbogenerators as a method of decreasing electrical energy production costs Krok Roman author Pasko Marian author Institute of Electrotechnics and Informatics, Faculty of Electrical Engineering, Silesian University of Technology Correspondence to: Roman Krok Correspondence to: Marian Pasko 16 12 2015 Elektrotechnika Zeszyt 1-E (8) 2015 2015 191 201 Copyright © 2015 2015 <p style="text-align: justify;"> This paper presents possibilities for reducing the costs of electricity generation as a result of modernizations aimed at increasing the rated power of turbogenerators. Programs for calculating temperature fields in large AC machines have aided work on turbogenerator modernization. Turbogenerators with increased rated power operate in many power plants in Poland and abroad, e.g. in Bulgaria, Finland, Greece, Slovenia, Korea and China. The example of TWW‑200‑2(2A) turbogenerator modernization is presented. The improved fans with increased capacity have enabled the increase in the turbogenerator rated power by 20%.</p>