Optimum Control Wind Power Installations Being Subjected to Ice Formation on Wind Wheel Blades Within Wind Electrc Station Structure

Abstract

On the basis of the analysis of wind electric unit control with preliminary installation of blades at a required angle according to an estimation of the drive pitch engine start timesubjected toice formation on wind wheel blades to minimize the wind turbine rotor angular speedtransient time, that promotes wind wheel rotation speed stability under the conditions of incomplete wind speed and the electric loadinginformation, that may change significantly with time, the criterion of access time to the of bladeposition control devicefrom the proposed and basic methods of control is established. The program module towind power automation control within thewind electric stationstructure is developed, providing relevantsystem preparation for external actions due to ice formation on blades wind wheel at different operation modes of power unit,that showedangular speed increase of a wind turbine rotor during winter time thus demanding more energy of a wind stream (14m/s) in comparison with the spring and autumn period (11.1m/s).Therefore, ice formation on wind wheel blades slows down wind wheel rotor rotation. Hence, the offered control method efficiency during winter time to avoid control delay is shown byrotation speed increase of a wind turbine rotor towards can be realizedforwind speeds exceeding 13m/s. The improved software control unit of wind power installation within the structure of wind power station based on the power unit operation modes provides: «Summer mode» - electric power generationunder favorable environment conditions; «Winter mode» - electric power generation under ice formation on blades wind wheel.