Alexander Sergienko, a postgraduate student at Stavropol State Agrarian University, modified the design of a synchronous alternator. The scientific development of the scientist will allow the use of small wind generators even at extremely low wind speeds.
Despite the dynamic development of green energy, many models of small wind power plants used to supply electricity to private households, farms or individual agricultural facilities have a number of disadvantages that reduce the efficiency of their use. Among the main problems are unstable output voltage, the fluctuations of which can disable electrical appliances, as well as a high range of electricity generation, in which the rotation of the blades begins only at a wind flow speed of 4-6 m / s.
In order to increase the efficiency of small wind generators, the scientist of Stavropol Agrarian University improved not only the generator, but also the autonomous power supply system itself, by modifying a synchronous generator, organizing a three-phase connection circuit of the generator windings with the possibility of switching the connection circuits «star» or «triangle» depending on wind speed and power of the consumer, by means of a microcontroller and a switching unit.
The use of such a design in small wind turbines makes it possible to stabilize the voltage and increase the range of electric energy generation twice.
— Wind power plants with this modification allow generating electricity in light winds at a speed of 2 meters per second, that is, almost in complete calm. At the same time, the output voltage, even at such a wind speed, will be sufficient for stable power supply to consumers,» commented Alexander Sergienko.
The scientific work received a diploma of the II degree at the All-Russian competition for the best scientific work among students, postgraduates and young scientists of agricultural educational and scientific organizations of Russia in the nomination «Electrical technologies, electrical equipment and power supply of the agro-industrial complex».