STUDYING THE EFFECTS OF THE SMALL WIND TURBINES ON THE LOW VOLTAGE GRID

Abstract

The research content of this paper presents the effects of small capacity
wind turbines when connecting to the low voltage grid of the power system. The
simulation results were performed on the 30/4 street, 30/4 tourist area entrance,
Long Hoa commune, Can Gio district, Ho Chi Minh city. Time domain simulation
results are performed in the Matlab/Simulink when the system has problems
such as 3-phase short-circuit, 1-phase short-circuit in case of without wind
turbine or with wind turbines operate at a fixed wind speed and when the wind
speed changes abruptly. From these simulation results it can be concluded that
by using Fast Fourier Transform (FFT) analysis it was shown that the more wind
turbines installed, the greater the Total Harmonic Distortion (THD%) as well as
increasing the settling time of voltage and current that will give the negative
affect to the power quality of the grid.