Wind turbine power and optimum energy, at variable wind speeds

Abstract

The purpose of the present paper is to determine the values of the real power of the WT, PWT-REAL, to observe, if the operation of the wind turbine is in the optimal area, in terms of captured wind energy. The real values of the wind turbine power are determined based on experimental data from a wind power plant. The value of the inertia moment, J, is calculated based on the real power values of the WT. Based on the values of mechanical angular velocity, MAV, and the power produced through the permanent magnet synchronous generator PMSG, we compute the real value of the WT power, which represents the basis of the recalculation of the mathematical model of WT, MM-WT. We determine the coordinates of the maximum power point, MPP, the maximum power, PWT-MAX and speed, nOPTIM as the values of the proportionality factors kO for optimal MAV, and kP factor for PWT-MAX are recalculated. The paper analyzes the evolution of the real powers of the WT in time. Knowing the real power of the WT, PWT-REAL, at the same wind speed, at different moments, we obtain useful information related to the optimal operation from the energy point of view.