STABILIZATION OF VOLTAGE AND FREQUENCY OF WIND POWER PLANT GENERATOR BY THE USE OF MAGNETIC REDUCER
The article considers mathematical description of combined electromechanical device having the properties of a synchronous machine connected to the frequency converter and a magnetic gearbox with a variable reduction coefficient. Two approaches to the mathematical description of the device are proposed: the first one is based on the power balance of two mechanical and one electrical channels of energies flow, the second approach is on the basis of the performance of the considered device in the form of two basic electric machines having one air gap. There is a resulting system of differential equations to describe the transient processes in the above three channels of a wind power unit (WPU). Hardware implementation of the closed-loop system is proposed, the latter stabilizes the voltage and frequency of the wind turbine at variable wind speed. Transients of wind turbines are analyzed according to the numerical mathematical model.