Voltage stabilizers of autonomous low power wind power installations

One of the ways to improve the energy characteristics of low-power wind power plants (WPPs) is to connect them directly to electricity consumers through a switchgear. In this case, it is necessary to stabilize not only the voltage of the electricity source, due to changes in the size and nature of the load, but also the frequency of the current, due to the variable rotation speed of the wind wheel. The paper presents structural and circuit solutions for stabilizers of electricity parameters of low-power wind turbines, made using modern element base, and reveals the features of their operation, advantages and disadvantages. It proposes a functional diagram of a voltage and frequency stabilizer for a synchronous generator with permanent magnets. The diagram contains an uncontrolled three-phase rectifier, a single-phase voltage inverter and a single-phase-three-phase transformer with a rotating magnetic field. The study reveals the principle of operation of an automatic control system for stabilizing electricity parameters. The proposed structural and circuit solution makes it possible to improve efficiency and reliability indicators and increase the speed of the control system for stabilizing the voltage and frequency of the wind turbine power generator. The results of the study will increase the efficiency of pre-design work on the development of energy-efficient stabilizers for the electricity parameters of low-power wind turbines.