Neural High Order Sliding Mode Control for Doubly Fed Induction Generator based Wind Turbines

Wind energy has many advantages because it does not pollute and is an inexhaustible source of energy. In this paper Neural High Order Sliding Mode (NHOSM) control is developed for Doubly Fed Induction Generator (DFIG) based Wind Turbine (WT). The stator winding is directly coupled with the main network, whereas a Back-to-Back converter is installed to connect its rotor to the grid. The proposed control scheme is composed of Recurrent High Order Neural Network (RHONN) trained with the Extended Kalman Filter (EKF), which is used to build-up the DFIG models. Based on such identifier, the High Order Sliding Mode (HOSM) using Super-Twisting (ST) algorithm is synthesized. To show the potential of the selected scheme, a comparison study considering the NHOSM, Conventional Sliding mode (CSM), and the HOSM control is done. To ensure maximum power extractions and to protect the system, the Maximum Point Power Tracking (MPPT) algorithm and the h control are also implemented. Simulation results demonstrate the effectiveness of the proposed scheme for enhancing robustness, reducing chattering, and improving quality and quantity of the generated power.

Structural static analysis of a VAWT blade under operational and extreme wind loads

This paper deals with numerical static analysis of a straight symmetrical blade for 3KW VAWT (vertical-axis wind turbine). The calculations were performed in order to predict the maximum stress and displacement levels over the blade structure under various loading cases (.i.e. normal and extreme wind conditions). By using SOLIDWORKS commercial software, a finite element (FE) model of blade, which made up of Aluminum material, was analyzed. The results showed that the blade structure would perform adequately withstand extreme load conditions