INFLUENCE OF WIND SPEED ON WIND TURBINES WITH DFIG GENERATOR AT WIND POWER PLANTS

Abstract

The purpose of the work: Determination of the mechanical and electrical parameters of the turbine with a DFIG generator at different values of the wind speed at start-up by means of simulation in the Matlab Simulink software environment. Methodology: a comprehensive approach that includes theoretical research and solving the following tasks: to establish characteristic moments of time in the process of starting a plant with a DFIG generator as a source of electricity; determine the angular speed and braking torque of the turbine during its start-up at different wind speeds; determine the active and reactive power of the DFIG generator during its start-up at different wind speeds. Results: Simulation of the operation of the wind generator was carried out in the Matlab Simulink software environment, in which a system for obtaining electrical energy from wind energy (DFIG) was built. The reactive power of electric motors, the efficiency of which depends on the power factor, is presented Scientific novelty: when the wind speed changes, a change in reactive power and a redistribution of the electric moment of the generator and the torque of the wind are observed. Full power, which is the vector sum of active and reactive power, and is supplied to the network by electric generators. Analysis of graphical dependencies allows you to see changes in time of active and reactive power, which cause changes in torque and speed of rotation in the wind generator. Practical significance: Studying the processes in the wind generator with the help of the proposed model allows you to compare the parameters of their operation under different modes and given wind speeds, determine the maximum values of the mode parameters, and obtain the necessary information for the implementation of reactive power compensation measures. The proposed model also makes it possible to find ways to improve the wind generator and the system for obtaining electrical energy for the operation of enterprises during the intensive reconstruction of Donbas. Key words: energy, active power, reactive power, wind generator, wind speed, transformer, generator, torque, blade rotation speed