The mode of kinetic voltage support in the DC link of the frequency converter of an electrically driven gas pumping unit, which is activated at short-term dips in the mains supply voltage, is considered. A method, system and algorithm of kinetic voltage support for maintaining the operability of a variable frequency electric drive and a compressor unit for a scalar control system are proposed. The results of computer simulation of the modes of stabilization of electric drives under conditions of external disturbances in the supply voltage are presented, which showed acceptable convergence with practical data up to the duration of voltage drops for three seconds.

A method for determining the spectrum of higher harmonics at the interval of the period of the fundamental frequency based on the fast Fourier transform is considered. A new algorithm for metering electricity in a network containing higher harmonics has been developed, the basis of which is the use of a newly introduced integral indicator of current, by which reactive power is estimated. On the basis of this software package, it is possible to analyze the spectral composition of the network, which makes it possible to increase the speed of the filter-compensating device, which affects the quality of electricity and its consumption.

The sodium filtration indication system is an innovative solution for monitoring and purifying liquid metal coolants in experimental stands of fast nuclear reactors such as SAZ, where sodium serves as the main coolant. The main goal of the development is to accurately determine the percentage of oxygen and other impurities in sodium loaded into the drain tank B2, followed by effective cleaning to prevent corrosion of equipment, reduce heat dissipation and potential emergencies. The integration of the oxide indicator and the cold trap into a closed loop ensures continuous quality control of the coolant, contributing to increased reliability and safety of nuclear installations.

Electromagnetic processes in traction power supply systems are attracting more and more attention due to the increasing requirements for energy efficiency and power quality. This article discusses the use of modern computer simulations to solve these problems. The developed simulation model makes it possible to study frequency characteristics, analyze current and voltage spectra, as well as assess electricity losses. Based on the simulation results, the issues of reactive power compensation and highharmonic filtering using stationary compensating devices (CC and PCU) are investigated. The conditions under which the use of these devices is necessary and effective, taking into account modern regulatory requirements, are determined.

The application of ultrasonic sensors under the influence of a lightning discharge (RM) and a powerful electromagnetic pulse (EMP) of a nuclear explosion on low-voltage distribution and information networks is considered. The parameters and modes of operation are given based on the principles of zonal protection and classification of ultrasound adopted for RM. The necessity of application of additional stages of ZUP at the input of the main board of the 0.4 kV network, as well as at the input of the information network under the influence of EMP.

The characteristics and application areas of protective Schottky diodes and TVS diodes in microwave circuits are compared, and the use of the former is more complete and cheaper in all types of electronic devices, including ZUP, up to operating voltages less than 10 V. The use of suppressors based on TVS diodes and their chains has expanded the use of protective diodes for operating voltages up to 400 V and powers up to 15 kW, while maintaining compactness but increasing the cost of the devices.

This paper presents an experimental analysis of the performance of a rooftop photovoltaic (PV) system installed on the new academic building of the State Energy Institute of Turkmenistan. The total installed capacity of the PV plant is 132 kW, consisting of two 66 kW sections equipped with 550 W Astronergy solar modules. The study is based on monitoring data obtained from two Growatt 60 kW grid-tied inverters over two consecutive days with high solar irradiance. Key performance parameters, including inverter efficiency, specific energy yield, and peak power, were calculated. The results show inverter efficiencies ranging from 95 to 98% and specific daily yields between 1,16 and 2,4 kWh/kWp, which correspond to typical values for clear-sky conditions in the region. The findings confirm stable system operation and demonstrate the suitability of Growatt inverters for long-term performance monitoring of PV installations under the climatic conditions of Turkmenistan.

In the context of global transformations in the energy system, the transition to renewable energy sources (RES) is becoming an integral part of the sustainable development strategy. The Kyrgyz Republic, endowed with significant potential in hydropower, solar, and wind resources, is gradually developing its own model of "green" energy. The integration of renewable energy sources into the existing energy system can reduce carbon emissions and decrease dependence on energy resource imports. The implementation of targeted government policies in the field of renewable energy, as well as the development of infrastructure and the creation of incentives for private investors, will ensure the sustainable development of the national energy sector. However, the process of adopting renewable energy sources is complicated by several factors: low investment activity, limited energy infrastructure, and the lack of comprehensive regulatory and legal frameworks. Despite these challenges, there is a positive trend — international cooperation is intensifying, pilot projects are expanding, and interest in environmentally safe technologies is growing. The effective development of renewable energy in Kyrgyzstan requires a holistic approach, including government support, legislative improvements, professional training, and the introduction of innovative solutions. The implementation of these measures will enhance the country»s energy resilience, reduce dependence on fossil fuels, and facilitate the transition to an environmentally safe and competitive economy. Renewable energy not only serves as a tool for decarbonization but also as a driver of innovation and socio-economic growth.