Practical Calculation Method of Circulating Current Loss for Large Turbine Generator Designs

Abstract

In this paper, the authors describe a practical calculation method of armature strand current distributions and circulating current losses for large turbine generators. A chain of analysis is made up of automatic mesh generation, a quasi three-dimensional linkage flux calculation and an armature strand network calculation. The calculated total armature coil losses for a 200MVA class turbine generator shows good agreement with detailed calculation results obtained by full three-dimensional magnetic field analysis.