Considerations Regarding The Perturb And Observe Method To Control High-Power Wind Systems Operating At Variable Wind Speeds

Abstract

In this study, the situations in which the Perturb and Observe Method (POM) can be used to determine the points in which the wind turbine operates at maximum power were examined. Among them, the points in which there are large fluctuations in wind speed over time were taken into consideration. The performance of management systems in wind power plants operating at variable wind speeds is determined using data received through measurements (wind speed values). The control systems based on the Perturb and Observe Method were analyzed and compared with the ones based PI-type (proportional-integrator) regulators, resulting in that the first ensures the wind turbine operates in the optimal area from the energy point of view. The conditions under which the Perturb and Observe Method can be applied have been determined here. The maximum power point coordinates (MPP) were also estimated. The connection between the optimal mechanical angular velocity and the wind speed was used to assess the quality of the adjustment. In this case, the obtained results were based on experimental data from the wind turbines in the Dobrogea area. The optimum area from the energy point of view is determined by changing the load of the electric generator and therefore, the new coordinates of the maximum power point of the turbine are estimated, e.g. the maximum power value and the optimal mechanical angular velocity.