Modélisation des alternateurs hydroélectriques dans leur environnement

Abstract

The integration of excitation circuits becomes important when analyzing the nonlinear effects of hydro-alternator in its environment. According to Hydro-Québec statistics, the most common excitation system used in hydropower stations is the static excitation. In fact, most generators operated by the Quebec’s power plant, are quietly approaching their end of life and aging is accelerated by advanced stage of phenomenon, such as: heating coils, background electromagnetic vibrations, losses in the stator winding, short circuit fault in inter-turn bars, eccentricity of the rotor or the stator, disconnection of the damper bars etc. The originality and the purpose of my work are focused on the study of the exciter in real case environment. Therefore, the first part of my project is to realize the finite element modeling of the hydropower alternator La Grande 4 using MAXWELL – Ansys in case study representing different failure modes of its excitation. The second part of my project is to do the diagnostic of excitation systems by defining the failure mechanisms through a hierarchical tree. The last part, will offer the opportunity to do the diagnostic of excitation systems by gathering and validating the Failure Modes and Effect Analysis trees. Finally, the problematic we aim to solve at this level is to study the impact of excitation systems over the hydropower generator and to analyze it in case of failures.

Date	24 Apr 2021
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Kamal Al-Haddad (Supervisor)