Intelligent Proportional Integral Terminal Sliding Mode Control for variable speed standalone wind energy conversion system

摘要

This study investigates the design of robust nonlinear controller for control of voltage and frequency of variable-speed standalone Wind Energy Conversion System (WECS). The variation in wind-speed and load raise the oscillation in terminal-voltage and frequency. These oscillation need to be minimized for enhancing the power management. To overcome this issue, an Intelligent Proportional Integral Terminal Sliding Mode Controller (iPI-TSMC) is proposed. Proposed iPI-TSMC establishes a fast-finite-time convergence with minimum steady-state error. Also this controller is robust against the wind velocity perturbation, load variations, and external disturbances. Closed-loop stability of the proposed controller is validated using Lyapunov-stability-theorem. The cogency of the proposed iPI-TSMC has been validated through MATLAB/simulink environment for different operating conditions. Also performance of iPI-TSMC is compared with fractional-order-proportional-integral (FOPI) and conventional integer-order-proportional-integral (IOPI) controllers. The simulation results, signifies the efficacy of iPI-TSMC as compared to other controllers. Feasibility of proposed iPI-TSMC controller is verified in real-time HIL simulator using op4510 platform. Statement of Industrial Relevance: Simulation analysis and the comparative study of iPI-TSMC with FOPI, and IOPI shows better performance to keep constant terminal-voltage during different wind-profiles, load variation, and external disturbance. Also, performance assessment of iPI-TSMC for different matrices during varying wind-profiles is found superior than FOPI and IOPI controllers. Performance validation of proposed iPI-TSMC for varying wind-velocity and load in real-time HIL simulator op4510 platform shows the feasibility of the proposed controller, which makes it suitable for real-time application.