Wind generation emulator using a DC machine

This work presents the implementation of a system capable of emulating the production curve of a wind turbine using a DC machine. The system consists of an asynchronous machine-ASM controlled by a variable frequency drive which receives the speed set point from a computer. This ASM was mechanically coupled to a DC generator. A DC/DC power converter was implemented for field weakening control over the DC generator in order to manipulate the generated voltage. The speed produced by the ASM emulates the wind resource. For each speed point, a voltage is generated according to the emulated production curve. Finally, the generated voltage delivered by the DC machine is regulated to a constant 48Vdc bus. This paper describes also the models of the DC generator and of the DC/DC power converters.