A new reactive power management strategy to enhance the behavior of the Wind Turbine Generator driven a DFIG under grid faults

This paper deals with the issue of the reactive power compensation in microgrid (MG) based on Wind Turbine Generator driving a Doubly-Fed Induction Generator (DFIG). Wind generators such as the majority of Distributed Generation (DG) systems are sensitive to the disturbances of the frequency and/or voltage. Subsequently, these systems must to be disconnected in case of voltage dip, typically where the voltage is less than 80% of rated value. DG which contributes to reduce energy loss during transmission can increase the capability of the voltage control in the power system by generating the reactive power support. In the case of the off-grid applications, sources of production may participate to the voltage control by providing or absorbing reactive power. In this work, a new strategy for determining the reference of reactive power in order to contribute to the correction of the grid voltage deviation during low or high voltage ride through is proposed. Then, the performances of both active and reactive power control of the DFIG under grid faults are analyzed through Matlab/Simulink software.