• Sarfaroz U. Dovudov, Tajik Technical University named after academic M.S. Osimi (Dushanbe, Tajikistan)
• Mikhail P. Dunaev, National Research Irkutsk State Technical University (Irkutsk, Russia)
• Sherkhon M. Sultonzada, Tajik Technical University named after academic M.S. Osimi (Dushanbe, Tajikistan)
• Manija A. Hakimova, International University of Tourism and Entrepreneurship (Dushanbe, Tajikistan)

This article presents an analysis of the energy efficiency of semiconductor direct current converters (DC/DC converters) used in photovoltaic installations. The study of power losses in the switches of a boost converter with pulse-width modulation (PWM) was carried out using a simulation computer model developed in the MATLAB environment with blocks from Simscape. The results of the simulation modeling of the graphs showing the dependence of output current and voltage on step changes in solar irradiance are presented. It has been established that with an increase in solar irradiance, the current and voltage increase, indicating a direct dependence of the generated current and voltage on the level of illumination. The developed model allows the determination of static and dynamic power losses in power semiconductor switches depending on the switching frequency. The analysis of the study showed that the DC-to-DC semiconductor converter with PWM control experiences significant losses during the switching on and off of semiconductor switches, which leads to a reduction in the efficiency of the converter. To reduce dynamic losses and increase the efficiency of the semiconductor converter, it is necessary to investigate a new control method based on the application of frequency- pulse modulation (FPM).

semiconductor converter, photovoltaic system, pulse-width modulation, energy efficiency, power losses

2026-06-05