ANALYSIS OF STATIC CHARACTERISTICS OF THE CENTRIFUGAL REGULATOR OF THE WIND ROTOR ROTOR WITH ANTI-FLUGE CONTROL
Modern wind turbines (VT) must operate reliably and safely over a wide range of wind speeds, which requires their equipment by means of speed and power control. At the same time in low-power VU priority is given to the regulation of the rotation of the blade around its axis in the use of centrifugal regulators, which have proven to be one of the simplest and most reliable means of regulation. The design of these regulators for the VT has its own specifics and should take into account in addition to the parameters of the controller and the parameters of the rotor. Proposed by G.H. Sabinin mathematical model of centrifugal regulator for weather vane control and the staff of the Institute of Renewable Energy of the National Academy of Sciences of Ukraine mathematical model for antifluge control allow developers to determine the parameters of the centrifugal regulator in its design.
Currently, the technological capabilities of the blade allow to obtain the blade profile as close as possible to the design, ie the expansion of the blade from end to camel to 1:4 and torsion up to 30°, which requires consideration of the angle between the blade chord and its moment of inertia vector. In a number of works mathematical models for weather vane and anti-weather vane regulation taking into account this angle were proposed. The analysis of static characteristics of the centrifugal regulator of the wind turbine rotor during antifluge-control at different angles between the blade chord and the vector of its moment of inertia showed that this parameter affects the accuracy of control and must be taken into account when calculating the controller parameters. Thus, the difference in the speed of the blade regulator, when the angles between the chord and the moment of inertia are 0° and 20° and taking into account the adjustment range of 20°, will be 9%. When adjusting the controller to nominal speed to match the aeromechanical characteristics of the rotor for efficient operation of the wind turbine, it is also necessary to take into account the angle between the chord of the blade and its moment of inertia vector. So the deviation from the nominal speed of the regulator and, accordingly, the rotor without taking into account the torsion of the blade at 10° will be 8.3%, compared with the blade without torsion. Bible. 12, fig. 10.
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