A Method for Stabilizing the Rotor Speed of a Vortex-type Wind Power Plant using Two Variable Elements of its Geometry

Variants of the rotation frequency stabilization of a promising vertically axial wind-driven power plant consisting of a doubly connected stator and a rotor with blades are considered. The paper proposes the use an aerodynamic method of the rotor angular speed stabilization by controlling the positions of two variable design elements of the plant with respect to its stator. As such elements, a lower guide structure (one of the stator elements) and an aerodynamic brake flap can be used. The method of controller synthesis by the angular speed of the rotor rotation is considered in detail. A feature of this controller is the presence of two control channels with one state variable. First, it is necessary to determine the dynamic ranges of torque control on the rotor shaft for each of the variable geometry elements. Based on the second-order control error equation, the desired control law of the angular rotor speed is obtained.Using the example of the problem solving of angular speed stabilization with given quality criteria, we simulated a synthesized control system for various initial data. It is shown that the designed controller is capable of effectively countering the influence of wind disturbances in a wide range of deviations of the current speed from the frequency desired for a given target value. This work was supported by the RFBR grant No. 18-08-00473 a, dated 25/12/2018 on the topic: “Development and research of optimizing and controlling methods of energy conversion processes in the complex type power plants, including those converting a continuous flow of a medium”.