Feedback action and genetic algorithm-based proportional-integral controller to improve the performance of the direct power control of a variable-speed contra-rotating wind turbine generation system

Abstract

An enhanced control scheme of a double-powered asynchronous generator (DPAG) integrated into a variable-speed contra-rotating wind turbine (VSCRWT) generation system is displayed in this paper. The original idea treated here is to develop a robust direct power control (DPC) using a new kind of proportional-integral (PI) regulator based on feedback command theory and genetic algorithm (GA) for the DPAG-VSCRWT system. The suggested feedback PI (FPI) controller based on the GA technique is designed to improve the performance and robustness of the DPC of the DPAG-VSCRWT system, especially the problem of low robustness. The DPC-FPI-GA strategy was applied to the machine inverter only, where the pulse width modulation (PWM) strategy was used to convert the reference voltage values generated by the FPI-GA controllers. Therefore, this strategy differs from the traditional DPC strategy in terms of principle, performance, durability, and effectiveness in improving the quality of current and energy. The DPC-FPI-GA approach with the PWM technique is applied to the VSCRWT system using a 1500 kW DPAG during various tests in MATLAB software. The characteristics of the presented DPC-FPI-GA approach with the PWM technique are verified by numerical simulations. The performances of the DPC-FPI-GA approach with the PWM technique are verified using performance indicators (such as the ripple ratio for torque, power, and current, as well as the harmonic distortion value of the current) and detailed discussions are given at the end of the paper. It was found that the proposed DPC-FPI-GA with PWM technique contributed significantly to the improvement of power quality produced by the DPAG-VSCRWT system even in the presence of internal and/or external disturbances. In addition, the designed DPC approach based on the PWM and FPI-GA techniques provides minimum harmonic distortion of current, reduces the ripples of the torque and energy, and enhances the time response of the DPAG-VSCRWT system.