Direct Vector Control Using Feedback PI Controllers of a DPAG Supplied by a Two-Level PWM Inverter for a Multi-rotor Wind Turbine System

In this paper, a so-called return control technology applied to a feedback proportional-integral (FPI) controller is used to control a variable-speed multi-rotor wind turbine (VSMRWT) conversion system with a double-powered asynchronous generator (DPAG). This generator is controlled by direct vector control (DVC). However, the proposed DVC based on FPI controllers is a new strategy and is different from a traditional control, where the FPI controller was used for this purpose to improve the performance of the DPAG. The paper also indicates the importance of using the DVC-FPI in improving the efficiency and robustness of the DPAG used as a system for converting mechanical energy into electrical energy. Using the FPI controller to improve the power generated by the DPAG can allow for to minimization of power ripples and improve the quality of the current in the network. Also, using the DVC-FPI leads to an improvement in overshoot and steady-state error (SSE) compared to DVC. DPAG enables separate control of the interacting and active forces of the system in both the transient and SSE. The numerical results of the DVC-FPI are compared with the results of the DVC of the DPAG at different operating conditions using the MATLAB environment. Furthermore, the comparison is made in terms of power ripples, total harmonic distortion of current, dynamic response, SSE, and overshoot, and this is performed in the case of changing or not changing the DPAG parameters. The simulation results illustrate the robustness and efficiency of the DVC-FPI to the parametric variations of the DPAG.