Improvements of Wind Turbine Power Efficiency by Using Four-Ports Machine Structure and Phased Rotating Plates

Abstract

Wind power or wind energy is a process to generate electricity from wind speed. However, there is a large amount of money that has been invested in wind energy, which makes wind power in the innovation of the current decade. But wind energy is still required further improvement. In this paper, a new design is proposed to improve a horizontal wind turbine-type performance by using Four-Ports Wind Turbine (FPWT). The FPWT consists of two subsystems in one frame. Subsystem-1, is consisting of Permanent Magnet Machines (PMM) with two rotors i.e., inner and outer rotors and one stator. The inner rotor is a wound rotor that is connected electrically to the rotor of the other machine and mechanically to the right-side plates through a gearbox. The outer rotor is composed of surface-mounted magnets and connected to the lift side plates, that it is rotated due to electromagnetic induction with a relative of the inner rotor rotation. Subsystem -2 is an induction machine where its rotor is connected electrically to the inner rotor of subsystem-1. Power conversion such as inverter is used to control the frequency of the output voltage and current to be suitable for use with 50 or 60 Hz. Finite Element Modelling (FEM) has been carried out to simulate the innovation system. The simulation shows the generation voltage of the subsystem-1 reaches suitable and expect voltage level when the wind is facing the front plates which i.e., voltage produced in the stator windings 370 volts, while the voltage produced in the inner rotor windings is about 450 volts. The inner rotor windings are connected to a rotor of subsystem-2, then the produced voltage in its stator windings is about 1000 volts that depending on the wind speed and gearbox ratio and control mechanism.