Abstract
A self-excited induction generator (SEIG) is very simple and robust, has a reduced unit size, is easy to implement and simple to control, and requires very little maintenance compared to other types of generators. In variable operating conditions, the SEIG requires a power electronics interface to transform from the variable frequency voltage output of the generator to a battery voltage output or the related applications. In our study, we tied the SEIG to the power electronics system comprising a diode rectifier and DC/DC converter, and then a final DC load for fuel cell applications was connected. An example of such an application is an electrolyzer where an equivalent circuit is modeled for use in this study. To accomplish the proposed system, we utilized PSCAD and MATLAB for its simulation, control, and analysis. A new system configuration considering three different wind speeds and breaker conditions is modeled and analyzed. The results show that the suggested strategies in this study would contribute to designing and analyzing a more practical power electronics interface system for a wind turbine generator with a DC load.
Highlights
In recent times, amongst the renewable energy sources, one of the fastest-growing energy sources in the world is wind energy
An active power and flux control technique for a self-excited induction generator (SEIG) for a variable speed wind generation (VSWG) using a power electronics interface, a DC/DC converter, was described and a SEIG performed as an isolated generator without other power sources
Due to the combination of the wind system, AC/DC, and DC/DC converters, the electrolyzer is modeled as a simple circuit model consisting of a resistor and ideal voltage source in series because it is connected to the power converter generating a voltage or current source
Summary
Amongst the renewable energy sources, one of the fastest-growing energy sources in the world is wind energy. In a variable speed wind power generation system, authors researched the active power and flux control algorithm of a SEIG in [3]. An active power and flux control technique for a SEIG for a variable speed wind generation (VSWG) using a power electronics interface, a DC/DC converter, was described and a SEIG performed as an isolated generator without other power sources. A technique for voltage and frequency regulation of three-phase SEIG feeding unbalanced loads, instead of common methods based on induction machine per-phase equivalent circuit, is presented in [10]. A selection method of the values of parallel and series capacitors for SEIG is proposed by considering the reactive power losses from the magnetizing and leakage inductances.
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