Anticipative Control of Low-Power Wind Energy Conversion Systems for Optimal Power Regime

Abstract

In this paper a novel anticipative control structure for WECS (Wind Energy Conversion System) operating at MPP (Maximum Power Point), which allows the improvement of the rotational speed closed-loop dynamics, is presented. The main idea is based on the remark that the wind speed acts upon the controlled plant as a disturbance and simultaneously generates the set point of the MPP control loop. An extensive comparative analysis of this new control structure is made with respect to the classical LQ control approach. The superiority of this new approach, consisting in better energy efficiency obtained with less control input effort, is illustrated for a permanent-magnet-synchronous-generator (PMSG)-based WECS by numerical simulation. The proposed control structure has been experimentally validated by using a real-time wind turbine electromechanical simulator.