Mathematical Modeling of the Energy Conversion System for DFIG Based Wind Turbines

In this paper, we study the control, operation and stability characteristics of Doubly-Fed Induction Generators Based Wind Turbines. In existent transmission grids, the inverter based design has proven to be the most reliable and efficient topology due to its higher ability to supply reactive during faults at the point of interconnection to keep the wind farms online. Nevertheless, there still exists limits and is also dependent on the design of the grid that the turbines are being integrated in. The mathematical model of the energy conversion system of the wind farm is crucial to the system planners to fully capture the behavior of the wind farm over its operation. As such, mathematically modeling the system and control mechanism provides a means to better understand the system by translating it graphically into vector reference frames. This paper attempts to address the modeling of the energy conversion system of a DFIG-based wind farm. The models can be beneficial to the designers and planners to optimally design and operate the wind turbine.