Voltage Regulation in Power Systems Using Asynchronized Turbo Generators of Power Plants and Optimization of their Quantity Selection

Authors

  • M. S. Lviv Polytechnic National University, Uzhhorod National University
  • A. V. Oleksyn Lviv Polytechnic National University
  • O. V. Saban Lviv Polytechnic National University

Keywords:

ASTG quantity selection, excess reactive power, regulatory capabilities of STGs and ASTGs, voltage regulation, methodology, generators

Abstract

The study examines the selection of the number of asynchronized turbo generators (ASTGs) required for installation at power plants during construction or reconstruction to compensate for excess reactive power exceeding the regulatory capabilities of synchronous turbo generators (STGs) to ensure the specified voltage levels. Compared with STGs, ASTGs have significantly superior regulatory capabilities under reactive power consumption modes. They are capable of maintaining specified voltage levels at the power system (PS) buses under minimum load conditions of the electric power system (EPS). At the same time, ASTGs are more complex in design than STGs and, consequently, more expensive. Therefore, it is not advisable to install only ASTGs in power systems. Their quantity must ensure the consumption of excess reactive power in the network and maintain the specified voltage levels at the distribution devices (DD) of the thermal power plants (TPP) in all operating modes. The input data for the calculations are the power profiles of the PS during the winter peak and summer minimum load periods as well as the manufacturer's diagrams of permissible operating conditions for various generator types. The developed methodology provides a detailed description of the procedure for determining the minimum number of ASTGs required for installation in power systems experiencing operating conditions with excess reactive power. The magnitude of the expected maximum of uncompensated excess of the reactive power at the PS buses and the regulatory capabilities of STG and ASTG in reactive power consumption modes are the key factors. An example of the calculation of the optimal number of ASTGs of the ASTG-200 type for installation in a power system with a rated capacity of 1400 MW and power units with a nominal capacity of 200 MW is provided. Based on the calculation results, it is advisable to install 3 turbo generators of the ASTG-200 type and 4 turbo generators of the TGV-200M type in the designed power system to maintain the specified voltage levels in all operating modes.

Author Biographies

M. S., Lviv Polytechnic National University, Uzhhorod National University

Dr Sc. (Eng.), Professor, Head of the Chair of Electric Power Engineering and Control Systems

A. V. Oleksyn, Lviv Polytechnic National University

Cand. Sc. (Eng.), Assistant of the Chair of Electric Power Engineering and Control Systems

O. V. Saban, Lviv Polytechnic National University

Senior Lecturer of the Chair of Applied Linguistics

References

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М. С. Сегеда, В. П. Олексин, і А. В. Олексин, «Техніко-економічні аспекти застосування на ТЕС АСТГ,» Вісник Вінницького політехнічного інституту, № 3, с. 71-75, 2013.

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Published

2026-03-25

How to Cite

[1]
M. S., A. V. Oleksyn, and O. V. Saban, “Voltage Regulation in Power Systems Using Asynchronized Turbo Generators of Power Plants and Optimization of their Quantity Selection ”, Вісник ВПІ, no. 1, pp. 66–70, Mar. 2026.

Issue

No. 1 (2026)

Section

ENERGY GENERATION, ELECTRIC ENGINEERING AND ELECTROMECHANICS

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