Investigation on the shaft voltage generation of large synchronous turboalternators

• Kevin Darques ^[1] ; Abdelmounaïm Tounzi ^[1] ; Yvonnick Le-menach ^[1] ; Karim Beddek ^[2]
  1. [1] Université de Lille, Arts et Metiers ParisTech, Francia
  2. [2] EDF Lab R&D, Francia
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 39, Nº Extra 5, 2020, págs. 1145-1156
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Purpose – This paper aims to go deeper on the analysis of the shaft voltage of large turbogenerators. The main interest of this study is the investigation process developed.

    Design/methodology/approach – The analysis of the shaft voltage because of several defects is based on a two-dimensional (2D) finite element modeling. This 2D finite element model is used to determine the shaft voltage because of eccentricities or rotor short-circuit.

    Findings – Dynamic eccentricities and rotor short circuit do not have an inherent impact on the shaft voltage. Circulating currents in the stator winding because of defects impact the shaft voltage.

    Originality/value – The original value of this paper is the investigation process developed. This study proposes to quantify the impact of a smooth stator and then to explore the contribution of the real stator winding on the shaft voltage.