Abstract
The Small Hydro Power Plants allow to increase the energy amount from
renewable sources, especially from small rivers in mountainous areas. This
paper presents a new concept of a energy conversion system for application
in a Small Hydropower Plant (SHP) which is based on a permanent magnet
generator (PM generator) with a propeller turbine integrated with the
generator rotor. The PM generator can work at a variable speed and
therefore energy produced by the PM generator has to be converted by means
of a power electronic unit to fit to the three-phase power grid
parameters. For this concept, dimensions and parameters of the PM
generator were specially designed on account of integration with water
turbine. The paper precisely describes elements of energy conversion
system and also presents the results of numerical tests for chosen working
conditions. An original algorithm of control strategy for power electronic
unit was used to adjust generated energy to the required parameters of the
three-phase grid.
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