Robust tuning of the control loops of DFIG wind turbine systems

This work proposes a computational tool to assist power system engineers in the field tuning of the control loops of wind power plants based on doubly-fed induction generators (DFIGs). The aim of the proposed approach is to generate a range of gain values for the control loops within which there is a theoretical guarantee of stability for the closed-loop system. This range is given as a set of limit values for the gains of interest. Parameter values belonging to the parameter range generated by the approach formally assure a robust tuning and a minimum performance index for the wind power plant with the tuned control loops. In this way, the engineer responsible for the field tuning of these control loops can be confident with respect to system stability when adjusting the corresponding gains within this range. The proposed tool is evaluated based on a system composed by a wind power plant connected to a subtransmission network.