CONTROL METHOD OF WIND-DRIVEN POWER PLANT WITH TWO WINDWHEELS, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC F03D7/02 

FIELD: power industry.

SUBSTANCE: wind velocity signal is shaped at the altitude of rotation axis of two simultaneously operating coaxial windwheels with equal numbers of n blades. Both windwheels are rotated synchronously to the same side. Angle α is measured between longitudinal axes, for example of the first blades of both windwheels at wind velocity when a wind-driven power plant (WDPP) develops the power equal to or exceeding rated power. The second windwheel is installed in relation to the first one at angle α≈0 at wind velocity when WDPP develops the power that is less than rated power. As wind velocity decreases, the value of angle α is increased proportionally so that value $$\alpha \approx \frac{\pi }{n}$$ can be set at minimum operating velocity. The method is implemented in WDPP with two windwheels, which includes blades of windwheels, hubs and a common shaft, an electric generator, a power system and a wind velocity sensor. In addition, WDPP is equipped with a control unit of an angle between windwheels, which is located on the common shaft of windwheels, and the control input of the control unit is connected to the wind velocity sensor output. Besides, the control unit is equipped with a functional unit for shaping of a signal on the angle between windwheels, the input of which is connected to the output of the wind velocity sensor through the control input of the control unit, and the output is connected to the first input of the angle control between windwheels, the second input of which is connected to the output of the angle sensor between windwheels; the output of the angle control between windwheels is connected to the control input of a semiconductor frequency converter, the power input of which is connected to a power supply, and the power output is connected to a stator winding of an electric motor, the shaft of which is connected to a screw - nut transfer system, the nut of which is connected to a movable element of the angle sensor between windwheels and through a bearing assembly to the hub of the second windwheel, which forms a screw spline pair together with the shaft.

EFFECT: efficiency of installed capacity of WDPP and increasing electric power output by improving use of wind energy with reduction of its velocity.

3 cl, 8 dwg