Results of research on output voltage stabilization in transient processes when connecting an active - in-ductive load to an asynchronous generator

Abstract

Relevance: In a world where demand for electricity is growing year on year, traditional power plants with low utilization rates require natural gas, coal, and petroleum products. Given the need to produce, conserve, and account for the negative impact of these energy resources on the environment, the importance of such power plants has declined in recent years. Climatic conditions are entirely favorable for the large-scale introduction of all types of renewable energy sources (RES) in the Republic of Uzbekistan, which are considered one of the most important areas in the energy sector of the future.

As is well known, in connection with this, manufacturing enterprises in the regions, in the course of implementing a number of decrees and resolutions adopted by the President of the Republic and the Cabinet of Ministers in 2024–2026, accelerated the installation of solar panels and the construction of micro-hydroelectric power plants in budgetary institutions and among domestic consumers. In addition, over the past few years, foreign investors have built and commissioned large wind farms. As a result, the country's complete dependence on traditional power plants has been eliminated and the consumption of electricity produced by thermal power plants has been reduced, resulting in significant energy savings.

Studies show that wind farms and hydroelectric power plants use synchronous generators (SG) and asynchronous generators (AG) with phase windings and squirrel-cage rotors. Connecting capacitor banks to the stator windings allows the AG to start automatically in the magnetic conductor due to its residual magnetization and to meet requirements such as output voltage stability. The proposed capacitor-based excitation method is decentralized, allowing the generator set to adapt its operating modes in autonomous power supply conditions. In this article, based on the results of the experiment, oscillograms reflecting the output voltage values in the transient processes of AG with a short-circuited rotor with a power of 4 kW were obtained and analyzed.

Aim: stabilization of output voltage and analysis of transient processes associated with connecting an active inductive load AG operating in autonomous mode.

Methods: methods for analyzing established and transient processes in electric power systems based on experiments were used.

Results: autonomous systems must meet requirements such as the simplicity of power supply design, ease of maintenance, relatively small mass (kVA/kg), and volume, as well as the stability of output parameters. Based on the analysis, appropriate proposals will be submitted for the use of AG in renewable energy sources.