The aim of this study is to develop the architecture of a diagnostic system and a multi-level reliability model aimed at improving the cost-efficiency and operational reliability of induction traction motors. To achieve this goal, a comprehensive development process was carried out: based on failure statistics, the main defects and types of damage to critical motor components...
This paper presents the synthesis of an automatic control system for a traction induction motor used in a transport diesel-generator power plant. The objective of the study is to improve the stability and dynamic performance of current regulation under varying operating conditions. The research covers three main aspects: analysis of the diesel-generator plant as a control object...
The main objectives of the study are to improve power quality (PQ) in grid-connected systems and mitigate voltage disturbances by using a dynamic voltage restorer (DVR) powered by a Photovoltaic (PV) system. By integrating PV as the primary power input, the DVR supplies clean energy for voltage restoration, thereby enhancing system efficiency and reliability. This approach...
The main objective of the study is to assess the feasibility of replacing rare-earth NdFeB magnets with ferrite magnets (BaFe₁₂O₁₉) in a 10 kW synchronous generator designed for use in renewable energy. Ferrites are 10–15 times cheaper than NdFeB and have high thermal stability but have a sig-nificantly lower residual induction and coercivity. To achieve this goal, the following...
The aim of the work is to increase the accuracy of electromechanical equipment (turbogenerator) designing, selecting the optimal design and maximum permissible electromechanical loads in given dimensions by using the capabilities of multiparametric design, in particular, using the particle swarm method. Due to the refined calculations the presence of thermal and mechanical...
The aim of this study is to develop a method for improving temperature control in an administrative and public building. Multi-story administrative and public buildings connected to a district heating system were chosen as the subjects of the study. The subject of the study is the heating system of an individual building. To achieve this goal, heating system operation was modeled...
The energy sector is currently undergoing a process of rapid digitalization, which leads to a signifi-cant increase in risks and vulnerabilities to cyberattacks in this area. Video sequences are desirable objects of falsification for intruders pursuing illegal goals, making the task of timely detection of their unauthorized changes critically important. However, methods for...
The main aim of this study is to investigate the performance and emission characteristics of Jatropha biodiesel blends in a diesel engine and to explore the potential of water-in-biodiesel emulsification as a strategy to enhance efficiency and reduce harmful emissions, particularly nitrogen oxides (NOX). To achieve these objectives, Jatropha biodiesel blends (B10, B20, B30) were...
The main objectives of this study were to develop and comparatively analyze methods for digital modeling of dynamic processes in electrical power transmission lines with distributed parameters, as well as to evaluate the accuracy of simplified lumped parameter models against full models. The re-search aims to overcome limitations of simplified equivalent circuits that may lead to...
The main objective of this study is to determine the optimal resistance of transformer neutral resistive grounding in 20 kV distribution networks using clustering methods. The research aims to achieve a technical balance between limiting single-phase ground fault currents, minimizing overvoltages, and reducing system sensitivity to stochastic fluctuations in network parameters...
Abstract. The article considers the possibility of using vortex generators on the back of wind turbine blades. The main objective of the work is to select the optimal shape of vortex generators for effec-tive boundary layer and separated flow control in the blade back region of wind turbines. To achieve this goal, the following tasks were set: determining the optimal shape of...
Reliability and cost-effectiveness of energy supply are crucial for socio-economic development and investment attractiveness of territories. In areas where there is a high demand for thermal energy, one of the ways to improve energy efficiency is using cogeneration systems with mini-CHP (combined heat and power) plants powered by gas-piston units. The main challenges preventing...
This paper presents a predictive methodology for assessing the technical condition of the first stage of an industrial centrifugal compressor to optimize maintenance intervals. The approach integrates computational fluid dynamics (CFD) modelling of gas-dynamic processes within the flow path with machine learning algorithms to predict the decrease in isentropic efficiency caused...
Grid-connected PV systems remain essential to supply energy demands as the globe shifts its focus to renewable energy sources (RESs). Although there are many advantages to this integration, there are also a number of issues with power quality and stability at the connection points. The aim of the study is to tackle photovoltaic (PV) energy systems voltage instability poor dynamic...
The main objective of this study is to reduce disturbances, such as voltage sags, swells, and fluctuations, increase stability of voltage and Power Quality (PQ) in distributed power systems using an optimized Dynamic Voltage Restorer (DVR) control strategy. These objectives are achieved through the design and optimal tuning of a Cascaded Adaptive Neuro-Fuzzy Inference System...
The objective of this work is to provide theoretical substantiation for the possibility of using power factor as a criterion in the development of optimized automatic control systems for AC electric rolling stock traction drives. The stated objective has been achieved through the solution of the following tasks: development of an algorithm for applying traction drive power factor...
Estimating electric power load at substations is a fundamental task for system operators, as it is es-sential for the reliable and optimal operation of the power system. Effective load forecasting is criti-cal for optimal power generation, as precise predictions facilitate the economical use of electrical infrastructure. The primary objective of this study is to develop advanced...
The European Green Deal Industrial Plan (EGDIP), announced by the European Commission to the other institutions and bodies of the European Union on 1 February 2023, aims to achieve a carbon- neutral European community by 2050 by transforming production and consumption paradigms. Main objectifis of the study aimes to describe the objectives, methods, and means of the EGDIP, to...
The purpose of the work is to increase the efficiency of the charcoal production process by pyrolysis of woody agricultural waste with the application of mirowaves. To achieve the goal, an experimental installation was developed, which allows the application of the pyrolysis method with the application of microwaves in the charcoal production process from wood. The research was...
The aim of this work is to study the efficiency of extended temperature schedules for regulating heat supply systems in a wide range of changes in the share of the HWS load. To achieve this aim, the following tasks were solved: initial and extended temperature schedules were calculated and con-structed; calculations of the operating modes of a model CHPP were performed and its...
The article investigates the influence of geometric parameters of inlet guide vanes (IGVs), including blade profiling and design features, on their operational efficiency. IGVs are widely used in centrifu-gal compressors of turbo-refrigeration machines with various refrigerants to control compressor per-formance by adjusting flow swirl at the impeller inlet. The purpose of the...
The primary objectives of this study are to evaluate the influence of modifying carbon felt electrodes on the formation of microbial electrogenic biofilm and the efficiency of bioelectrogenesis in a two-chamber microbial fuel cell. Microbial fuel cells represent an alternative energy technology that enables the conversion of organic matter into electricity through microbial...
The aim of the work is to simulate and analyze the efficiency of combustion of methane-hydrogen mixture in an environment with increased oxygen content, and in the limit - in pure oxygen, in a fire-tube boiler to reduce CO2 emissions. To achieve this goal, the following problems were solved: development of a mathematical model of a three-pass fire-tube boiler for operation when...
The article investigates the carbon dioxide (CO₂) centrifugal compressor using computational fluid dynamics (CFD). CO₂ centrifugal compressors are used in refrigeration and cryogenic systems, power plants with subcritical and transcritical cycles, including Brayton cycle. This work is a part of a re-search effort aimed at developing a methodology for calculating the gas-dynamic...
The aim of this study is to optimize the operating mode of a pneumatic system by determining the braking start and end coordinates that minimize the piston speed without the use of damping devices. This approach avoids the discharge of compressed air into the atmosphere and brings the operating conditions closer to an energy-saving mode. The goal is achieved through the...