Optimization of the power converter for induction machine rotor in hydropower applications

Abstract

The aim of this research project, dissertation, is focused on the optimization of the power converter for induction machine rotor in hydropower applications. In fact, a micro-hydroelectric power station, a low-power hydroelectric power generation installation, uses for most of the cases an induction generator to transform mechanical energy from hydraulic turbine into electric energies. The electrical energy produced is transmitted into network or load island by using the direct-connection method. The last one has serious limitations on all production and transmission energy system such as quality of power is deteriorated close to the induction machine, limiting possible conditions of power transmitted control and problems related to the highest of starting currents. After a critical analysis and reviewing the previous methods with their weakness, in this research project, an AC-DC-AC power converter is presented as solution to be connected with the induction generator before injecting power into the gridside or island part. The main objectives of this work were achieved and the simulation of results are conducted with MATLAB/Simulink software, with also some specific experimental set-up to achieve our expected outcomes. The major results of our project were shown in Fig.4.1, Fig.4.2, Fig.4.3, Fig.4.4, Fig.4.5 and Fig.4.6. Our recommendations were formulated and a general conclusion of our research project was carried out.