LVRT SCHEME OF WIND ENERGY SYSTEM USING PERMANENT MAGNET SYNCHRONOUS GENERATOR AND HYSTERESIS CURRENT CONTROLLER

In this research paper provided the information about low-voltage ride-through (LVRT) scheme for the permanent magnet synchronous generator (PMSG), and wind energy conversion system. The dc-link voltage is uncomfortable by the generator side converter instead of the grid-side converter (GSC). Considering the nonlinear correlation between the generator speed (ωm) and the dc-link voltage (Vdc), a dc-link Voltage controller is anticipated using a hysteresis current controller. Among all, low-voltage ride-through has been fundamental in the field, which is one of the most important challenges for wind energy conversion system. It is essential to design an included controller to protect the converter from overvoltage/overcurrent and to support the grid voltage during faults and recoveries. A unified dc-link voltage control scheme and hysteresis current controller based wind energy conversion system is proposed. The controllers for grid-side converters are coordinated to provide fault ride-through capability. The generator side is forced by space vector modulationand grid side implemented hysteresis current controller. The Grid Side Controller controls the grid active power and maximum power deliver to the grid. The ability of this control algorithm has been confirmed by simulation results.