Application of multimode controlled VVVF converter in hybrid wind plant for electricity generation, storage and regeneration

摘要

This paper present the application of multimode soft switch IGBT variable speed converter (VSC) as a power interface in a hybrid wind power generation consisting of wind turbine, modular generator, and auxiliary photovoltaic array for electricity generation and storage. The system uses a modular-fed induction generator for the wind turbine and another generator for the diesel generation unit. The 48Vdc photovoltaic module serves as ride "thru utility". The generator is connected to the grid through power electronic converters and is operated in variable speed mode to maximize the" wind energy, as well as balancing the system load demand with less fuel consumption and operates at a 1/3 the power of wind turbine rating. VSC reduces mechanical stress, noise, increases energy production and smooth the fluctuation of power injected into the grid. The unit has four-quadrant capability with an active front end that provides full regeneration to the source, controllable power factor, and flux vector control that allows for instantaneous torque regulation. (VSC) has peak efficiencies of over 96% with total harmonic distortion of less than 3%. The converter works both in grid-tied and stand alone configurations. Math lab is used for the system model simulation.