Abstract
The article presents comprehensive results of research on two representative topologies of converters used in the path of processing energy generated in a wind turbine and transmitted to the grid. The topology T1 uses a two-level transistor-controlled rectifier as a converter from the generator side, while the T2 topology uses DC/DC boost converter. In both topologies, a three-level back-to-back converter with a line filter L was used as a grid converter. The conclusions indicate the tendency of changes in power losses depending on the aforementioned parameters and can be used at the stage of deciding on the choice of topology, operating parameters or selection of control methods depending on the specific operating conditions of the wind turbine.
Highlights
There are several ways to convert the energy generated in a wind turbine and transfer it to the electrical grid
Multipole synchronous generators with permanent magnets are becoming unbeatable in comparison with squirrel cage (IG) [24] or double fed induction generators [24,25,26]
Converter of energy generated by wind turbines in power convertThe features of conversion ersThe are: features of conversion of energy generated by wind turbines in power converters- are:efficiency of the grid converter;
Summary
There are several ways to convert the energy generated in a wind turbine and transfer it to the electrical grid. For low and medium power ranges, the predominant solution on the side of the generator is the use of a diode rectifier [8] and a grid converter fully controlled VSC from the grid side. Such a topology has one fundamental flaw, i.e., it limits the range of applications at low speeds due to too low a voltage on the DC bus. In order to eliminate this flaw, the solution are used that extend the work range by adding an additional DC/DC converter which increases the DC voltage [25] An alternative to this solution is a fully controlled transistor converter on the side of the generator [27,28].
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