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Master Thesis
Department of Electrical
Engineering
Simulation and Evaluation of
a Small Scale Pump Storage
Plant With PM Generator
By Lornts Mikal Sklett
Supervisor: Arne Nysveen
Background
Fig1:
Permanent magnet, with magnetic field lines
Fig2:
Reversible pump turbine
The background of this master thesis is to investigate the possibilities to use a permanent
magnet (Fig1) generator in a small scale pumped storage power plant, as a cost effective
alternative in providing a stable system support in the Norwegian grid. The main benefits by
using a PM is mainly a less complicated design of the machinery and plant installation, at a
lower cost than the traditional synchronous machine with a electromagnet in the rotor.
The project is built up around a fictitious hydro power location, with a given grid connection.
The generator is chosen to 15 MW, as a reversible pump turbine configuration (Fig2). The
considerations around starting up a permanent magnet machine in pump operation is to be
explored, together with the effects of grid connection requirements such a generating unit
is met with. Simulations of the pumped hydro power plant are executed in the simulation
program Matlab Simulink SimPowerSystems.