Speed and Reactive Power Regulation of Doubly-fed Induction Generator using Model Predictive Control

摘要

The Doubly-Fed Induction Generator allows efficient energy generation in plants where turbine speed has a non-controlled behavior. The stator flux oriented control represents a vector control technique that controls the rotor speed and reactive power through power converters in back-to-back configuration, where the power system allows that the induction machine operates at the synchronous, sub-synchronous and super-synchronous speed. With such configuration, this paper analyzes the decoupled control strategy using a model-based predictive control with the support of an incremental model of the machine in order to control the rotor current loop. It is shown that the proposed strategy presents a computational advantage when it is associated to an external decoupler of the system.