Indirect Field Oriented Control and Synergetic Control of Doubly Fed Induction Generator-Comparative Study

Wind energy is one of the fastest-growing, cleanest, unlimited and free renewable energy. The Doubly Fed Induction Generator (DFIG) has become a persistent solution for applications in the field of variable speed wind turbines, thanks to the accessibility to the stator and the rotor thanks to its advantages. However, this type of generator is difficult to control because it has a complex and a non-linear model. This paper presents a comparative study between the Indirect Field Oriented Control (IFOC) with Proportional-Integral controller (PI) and the Synergetic Control (SC) of a Doubly Fed Induction Generator, dedicated to the production of the electrical energy in a wind system. The synergetic control technique is proposed to improve the power grid quality and prove robustness against parameters variations and therefore to address the main drawback of Indirect Field Oriented Control based on traditional Proportional Integral regulators that their gains depend directly on Doubly Fed Induction Generator parameters.