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Department of Electric
Power Engineering
Spring 2017
Modeling, Simulation
and Detection of
Rotor Faults in
Hydrogenerators
Supervisor:
Arne Nysveen
Co-supervisor:
Mostafa Valavi
Kari Gjerde Jørstad
Background
The hydropower generator is a critical
component in hydropower stations and is
therefore subject to condition monitoring and
preventive maintenance strategies to avoid
failures of the generator components. In this
master thesis short circuit faults in the rotor
windings will be studied.
The project was started on the basis of Kalvdalen
hydropower plant, where some short circuited
windings were discovered in one of the rotor
poles. As a result of investigations on the short
circuited windings, questions arose about the
possibility of on-line monitoring of short circuit
faults in the rotorwindings, todetect degradation
and to get early warnings of potential faults.
Objective
The objective in this thesis is to develop a model
of Kalvdalen hydropower generator in Ansys
Maxwell and analyze different internal fault
conditions in the rotor windings. Further the
objective is to propose suitable methods and
monitoring techniques for identifying these
faults in operating generators.
MASTER THESIS
Model of generator in
Ansys Maxwell