Design of Vector Control Strategies Based on Fuzzy Gain Scheduling PID Controllers for a Grid-Connected Wind Energy Conversion System: Hardware FPGA-in-the-Loop Verification

This paper presents a hardware implementation upon Field Programmable Gate Array (FPGA) of improved Vector Control Strategies (VCSs) based on Fuzzy Logic System (FLS) grid-connected wind energy conversion system. Usually, the classical VCS is fixed-gain Proportional Integral Derivative (PID) controllers, which are known to exhibit limited performance against nonlinear behavior systems, such as rapid fluctuations speed and uncertainties system parameters. In order overcome this limitation, an Gain Scheduling PID controllers (VCS-FGS-PID) suggested in work guarantee good tracking, high accuracy robustness under parameter variations. Indeed, controller gains tuned, real-time, by FLS. addition, proposed VCS-FGS-PID methods implemented FPGA reduce delays period control loop, thanks its parallel processing. fact, approaches proved digital simulation with Xilinx generator tool Matlab/Simulink, addition experimental hardware-in-the-loop using FPGA. The obtained results demonstrate that techniques offer better regards tracking stator resistance variability compared VCS-PI.