wind turbine

The work presents the development and investigation in MATLAB of a model of an autonomous self-excited induction generator with a rotor circuit inverter for a wind turbine. The system employs a scalar-controlled inverter with an independent power supply, and the nonlinear magnetization curve of the induction generator is taken into account. Voltage and frequency regulation are separated. The developed model made it possible to study the self-excitation mode for different rotor supply frequencies.

Due to the rapid depletion of non-renewable energy resources and the exacerbation of environmental crises caused by global warming, humanity is actively seeking alternatives in the form of renewable energy sources. These sources are not only becoming an integral part of the modern energy sector but also serve as a foundation for building a sustainable future. Among these sources, wind energy stands out, being one of the most promising options for both developed economies and private investors interested in long-term "green" projects.

Due to the rapid depletion of fossil fuel reserves and the intensification of problems associated with global warming, humanity is increasingly focusing on renewable energy sources. They have become not only an essential component of modern energy systems but also a foundation for the sustainable development of the future. Wind energy, as one of the most accessible sources of renewable energy, is attracting growing interest from both governments of developed countries and private investors.

This paper explores the evolution of wind power plant (WPP) control strategies, from simple approaches aimed at optimizing the operation of individual wind turbines to the development of more complex systems that manage WPPs as single integrated entities. Particular attention is paid to the key requirements for WPP control systems and the analysis of WPP structure, especially in the context of their integration into the overall power system. The main objectives of WPP control systems have been studied.

The conditions of the point of common coupling choice of wind power plants are shown schematically and the conditions that must be met for their joint operation as a part of the power systems are described. The effects of integration of wind power plants into the power systems at the local and general levels are analyzed. The requirements of the international Grid Codes to the frequency control of the power systems with wind power plants are considered.

The development of the national wind power industry in Ukraine faces a number of problems because of the lack of sufficient information on the peculiarities of the operating modes of wind farms under real-life conditions. This applies to wind load indices in different regions, estimates of the performance of wind power plants with different types of wind turbines.

The differential equation of wind-wheel rotational motion under the influence of aerodynamic and resistance moments was built on the basis of the simplified kinematic scheme of horizontal axis wind turbine and with the help of Lagrange second-order equations. The determination of motion parameters and the construction of appropriate time diagrams were realized taking into consideration time dependencies of wind-flow speed.