Experimental Verification of Variable Speed Wind Power Generation System Using Permanent Magnet Synchronous Generator by SEPIC Converter Circuit

Abstract

Nowadays, the extraction of power from wind at a large scale became a well recognized industry. This fast development of the wind power industry was possible due to several reasons, like: the increasing resistance regarding the use of coal, oil or uranium, the high price of oil and the climate change problem. Because of the rapid development of power electronic devices and thus decreasing equipment costs, the variable speed wind turbine concept with full-scale frequency converter has an increasing market share. The most common generators used in this topology, the doubly fed induction generators (DFIGs) and permanent magnet synchronous generators (PMSGs), allow the extraction of maximum power from a large wind speed interval. This project presents the experimental results of variable-speed wind power generation system using permanent magnet synchronous generator. The boost converters and inverter are utilized as converters for the variable speed wind power generation system. The wind turbine emulator are reproduced the behaviors of windmill by the servo motor drives. The variable frequency obtained from the PMSG is converted into the fixed frequency output irrespective of the variable wind speed and generator output.  The level of harmonics in the inverter circuit is greater reduced with the implementation of Space Vector Modulation. For variable wind speed are changed two values have been chosed and result of SEPIC converter is compared. SEPIC converter operating at fixed frequency and duty ratio. It reduces the component count and eliminates the need of bulk inductor. Thus the simulation and prototype model is developed to demonstrate the effectiveness of the system.