“UZBEKHYDROENERGETICS” scientific and technical journal
Scientific and technical journal "Uzbekhydroenergetic" founded by "Uzbekhydroenergo" joint-stock company was registered by the Press and Information Agency of Uzbekistan on September 8, 2018 with certificate No. 0989. Since 2019, this magazine has been published once every quarter. 2020 05.00.00 – Technical sciences / 05.05.00 – Energy and electrical engineering by the decision No. 287/9.1 of October 30. Technology of electrification of agricultural production. The publication of the main scientific results of OAC dissertations on electronics specialties is included in the list of recommended scientific publications. The main goal of the magazine is to deeply study and widely promote the basic concepts and principles of the hydropower industry, the design solutions and foundations of the modern hydropower facilities that are being built, to cover the scientific and innovative activities of the Society, the scientific and practical developments of the field researchers, and the investment projects implemented in the system. consists of Professors and teachers of prestigious higher education institutions of our country and abroad, who are conducting scientific research in the field of hydropower, energy, hydrotechnics, water management, practicing specialists, doctoral students, independent researchers, master's students, students can submit articles to the journal.
NATIONAL INNOVATIVE APPROACH TO THE CONSTRUCTION OF THE LOWER CHATKAL HPP
The article details the scientifc and technical features of the “Investment Project for the Construction of the Lower Chatkal Hydroelectric Power Plant on the Lower Chatkal River”, implemented by JSC Uzbekhydroenergo, its place and signifcance in modern Uzbekistan›s hydropower sector, the national innovative approach to this project, and issues of localization in construction material production processes. In particular, the article presents the geological and hydrological aspects of the Lower Chatkal River, new national technological processes for research and production of materials for the ﬂushing gallery being constructed at the site, as well as an analysis of conclusions and results
hydraulic structures, hydrological observations, water ﬂow rate, cast iron plate, concrete works, concrete strength, chemical minerals.
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IMPROVEMENT OF THE PHOTOGRAMMETRIC SURVEY METHOD IN UNDERGROUND MINE WORKINGS CONSIDERING HUMIDITY (CASE STUDY OF GISSARAK HPP TUNNELS)
This study explores the specifc features of photogrammetric surveying of cross-sections in underground mine workings located in high humidity environments, particularly near reservoirs. The theoretical foundations of photogrammetry, hardware and software tools, and the measurement methodology under hydrogeological conditions are analyzed. Special attention is given to the impact of humidity on image quality, including reduced contrast. Based on the research results, a humidity correction coeffcient is proposed to improve the accuracy of photogrammetric measurements and enhance spatial modeling technologies for mine workings in complex hydrogeological conditions.
photogrammetry, humidity, mine surveying, Gissarak HPP, Agisoft Metashape, 3D modeling, underground mapping
SYSTEM OF MONITORING AND FORECASTING WATER RESOURCES USING SCADA SYSTEM
Automation of data processing allows analyzing large volumes of data, which makes this method one of the most effective for taking into account all factors in modern conditions of water shortage. The article discusses the issues of automation of data processing and the use of SCADA systems in multi-measurement systems. The article presents a data analysis model based on orthogonal discrete Лаггер polynomials, a prototype of a multi-measurement system and a mnemonic scheme of a SCADA system.
Water resources, SCADA system, Digital twin, Lagger polynomials, Mathematical modeling, Forecasting, Sensor network, ATmega328E, Water quality, Automated monitoring, Closed water systems, Aydarkul, Multiparametric measurement, Evapotranspiration, TDS, pH, Temperature, Intelligent data analysis, Water use management, Agricultural water supply, Climate change, Sustainable development.
OPTIMIZATION OF SELF-START MODES OF ELECTRIC MOTORS OF PUMPING STATIONS OF MACHINE WATER LIFTING SYSTEMS
The article presents the results of feld studies of unsteady processes during self-starting of electric motors at pumping stations. The article considers the modeling of transient processes in the modes of self-starting of an asynchronous electric drive of a pumping unit in order to identify the nature of changes in the ﬂow rate, pressure, and resistance torque on the pump shaft in the above modes.
self-starting, pumping unit, pumping station, machine water lifting system, voltage suppression, pump unit, pressure pipeline, power equipment, electric drive, asynchronous motor, ﬂow rate, rated power, mathematical model, pump operating characteristic, hydromechanical process.
PATTERNS OF UNDERGROUND WATER MOVEMENT IN THE FERGANA VALLEY AND THEIR DESALINATION FOR IRRIGATION USE
The article considers the patterns of groundwater movement in the Fergana Valley, as well as the possibilities of their desalination for reuse in irrigation. Particular attention is paid to the design and hydraulic characteristics of the Great Fergana and Andijan Canals, their role in water supply of agricultural lands. The process of concentrated salt liquid movement in pipes and canals is described, ﬂow regimes (laminar, turbulent, transitional) and the inﬂuence of the Reynolds number on the distribution of salt concentration over the cross-section of the ﬂow are considered. Recommendations are given for the effcient use of drainage water in order to save fresh water during irrigation.
Fergana Valley, groundwater, desalination, irrigation, Great Fergana Canal, Andijan Canal, Reynolds number, turbulent ﬂow, salt concentration, water permeability.
IMPLEMENTATION OF REMOTE MEASUREMENT TECHNOLOGIES FOR SITES WITH COMPLEX TERRAIN
This article addresses key challenges in the felds of geodesy and cartography, particularly in conducting topographic surveys in mountainous areas, and explores solutions enabled by modern computer technologies. It highlights the potential to reduce time and labor costs through the use of Digital Elevation Models (DEM), as well as the ability to obtain and analyze data quickly.
ArcGIS, MapInfo, DEM, digital elevation model, topographic survey, satellite data, 3D modeling, cartogram, contour lines.
SELECTION OF ARTIFICIAL NEURAL NETWORK PARAMETERS IN COMPLEX OPTIMIZATION FOR OPERATIONAL CONTROL OF POWER SYSTEMS
This article considers the processes of selecting and optimizing artifcial neural network (ANN) parameters as a complex optimization method for operational control of power system states. The main goal of the study is to increase the effciency of the power system in conditions of dynamic changes, ensure its stability and reliability. To achieve this goal, the structure of ANN models, learning algorithms, and methods for selecting hyperparameters were analyze Based on the results of experimental modeling and simulation, an optimal combination of parameters was determined, which signifcantly improved the system›s ability to make quick and accurate decisions. The results of the study provide approaches aimed at expanding the possibilities of effective use of ANNs in optimizing the state parameters of power systems
power systems, operational control, artifcial neural network, parameter optimization, complex optimization, hyper parameter
METHODS FOR EXTENDING THE SERVICE LIFE OF HYDRAULIC STRUCTURES
This work considers the issues of the procedure and methods for extending the service life of hydraulic structures in the absence of design documentation. Requirements for monitoring the technical condition of class IV hydraulic structures are presented
hydraulic structures, safety, operation, monitoring, extension of service life, method, accident
ROLE AND IMPORTANCE OF HYDROELECTRIC POWER PLANTS IN ENSURING RELIABLE ELECTRICITY SUPPLY
Operating hydroelectric power plants during peak load hours is an important aspect of energy consumption management and power transmission. Hydroelectric power plants have excellent start-up and shut-down characteristics, allowing them to respond quickly to sudden changes in electricity demand. During peak load periods, when electricity consumption reaches its maximum, hydroelectric power plants are able to provide the necessary generation volume, contributing to the stabilization of the energy system.
hydroelectric power plant, thermal power plant, hydraulic unit, rush hour, operational personnel of the system, reservoir, reliable power supply.
ENHANCING THE EFFICIENCY OF HYDROELECTRIC POWER PLANTS THROUGH EQUIPMENT RECONSTRUCTION AND ITS IMPORTANCE
This article provides detailed information about hydroelectric power plants, their operation, and some specifc components. The main components detailed are the installed parts, water distribution mechanism, rotating mechanism, main shaft assembly, bearings and their sealing components, oil collection device, speed governor oil line, water pipeline, gas pipeline, instrumentation nozzle, and servomotors.
hydroelectric power station, generator, turbine-generator, turbine, rotating part, shaft, engine.
IMPORTANCE OF MICROHYDROELECTRIC POWER PLANTS AS A SUSTAINABLE ENERGY SOURCE
This article is dedicated to micro hydroelectric power plants. Micro-hydroelectric power plants (micro HPP) are small-scale hydroenergy systems that serve as environmentally clean and sustainable energy sources. The article discusses the main characteristics of micro-hydroelectric systems, their construction, technical and social aspects, as well as their role in sustainable development. The possibilities of small-scale energy production through micro-hydroelectric systems and their benefts in mountainous areas, as well as their role in improving local energy supply, are discussed.
micro HPP, hydro turbine, environmentally clean energy, power supply, large HPP, river ﬂow, reservoir.
GLOBAL AND NATIONAL SIGNIFICANCE OF HYDROELECTRIC POWER PLANTPOWER PLANTS AND THEIR DEVELOPMENT DIRECTIONS
Hydroelectric energy usage is expanding globally, and this sector plays a crucial role in both global and local energy systems. This article is dedicated to analyzing the position and signifcance of hydroelectric power plants within the energy systems of the world and our country. Additionally, the article examines how hydroenergy serves as a sustainable source from ecological and economic perspectives. In the case of Uzbekistan, the increasing demand for renewable energy sources and the prospective plans in the hydroenergy sector are also discussed.
hydroenergy, water energy, HPP (Hydro Power Plant), electric power, renewable energy sources.
DEVELOPMENT STRATEGY IN PRACTICE: ISSUES OF ANALYZING THE EFFECTIVENESS OF THE INDUSTRY›S ACTIVITIES IN THE FIRST HALF OF THE YEAR AND SETTING NEW TASKS
The article provides a detailed overview of the work carried out by JSC «Uzbekgidroenergo» within the framework of programs and projects for electricity generation, construction and installation works, and investments during the frst half of 2025. The errors and shortcomings in meeting the planned indicators are analyzed, and current tasks for the future are outlined
hydropower projects, investments, innovations, production, localization, modernization, additional capacities.
ENHANCING ECONOMIC EFFICIENCY IN THE UTILIZATION OF WATER RESOURCES AND HYDRAULIC STRUCTURES
The article provides analytical insights into the widespread use of resource-effcient technologies in the hydropower sector today, aiming to achieve high proftability and ensure economic stability. The critical importance of the hydrometry service is substantiated in maintaining accurate water inﬂow records for each hydropower plant, ensuring the necessary water reserves in accordance with the capacity of the station’s units, and managing the release of excess water without losses. It also emphasizes the management and accounting of water, as well as establishing equitable relations with all consumers in the use of water resources. The signifcance of equipping this sector with modern instruments and qualifed personnel, as well as the importance of digitizing existing water conveyance and measurement structures, is highlighted
unit, hydraulic structure, hydrometric service, economic sustainability, ﬂow rate, resourceeffcient technologies, water reserves, water consumption.
THE ROLE OF TESTING LABORATORIES IN THE DEVELOPMENT OF THE HYDROTECHNICAL INDUSTRY OF THE REPUBLIC
The construction of hydraulic structures, in comparison with the construction of other industrial facilities , has several signifcant peculiarities that greatly inﬂuence the execution of work, the sequence and timing of the construction. The design, construction and operation of various hydraulic structures (dams, canals, reservoirs, etc.) require an integrated approach to these issues. In this regard, the role of the Integrated Testing Laboratory occupies one of the key positions in addressing a range of complex tasks.
INVESTIGATION OF THE DYNAMIC BEHAVIOR OF SOIL STRUCTURES CONSIDERING VARIOUS DEFORMATIONAL PROPERTIES AND SOIL WATER SATURATION
The study is devoted to the investigation of the dynamic behavior and stress strain state of soil hydraulic structures (dams) under real dynamic (seismic) impacts. The results obtained from the numerical implementation of the formulated problems are compared, taking into account elastic and elasto-plastic soil deformation laws.
dam, construction, moisture transfer, fltration, heterogeneity, methodology, fnite elements, elasticity, elastic-plasticity, dynamic load.
ANALYSIS OF THE MAIN CAUSES OF THE ENERGY CRISIS IN KYRGYZSTAN
he article substantiates the problems and potential for the development of the energy system of Kyrgyzstan, the causes of the energy crisis, and the formulation of the program for the development of the energy system in the country. The main factors contributing to the emergence of this problem are considered. The object of the study is to identify the causes of the energy crisis in the Kyrgyz Republic, and the subject is to study the infrastructure for eliminating the energy crisis in the Kyrgyz Republic
Electric power complex, generating and transmitting capacities, power factor, reliable energy supply to consumers, river inﬂow, infrastructure for eliminating the energy crisis.
Employment is the main force in the professional development of each specialist working in production processes, in the work in production and in its management. Thus, the main wealth of each state is its citizens, including young people, who make up a large part of the population. Therefore, ensuring occupational safety a oʻzimnd maintaining the health of citizens is an important factor in the social development of society.
production, occupational safety, risk, management, hazardous object, process.
MODELING OF CANAL PROCESSES IN THE DARGOM CANAL USING GIS TECHNOLOGIES
The article presents the results of monitoring the technical condition and channel processes of the main Dargom canal using Geographic Information System. The possibility of identifying changes in the canal›s slopes and rock morphology, as well as developing optimal solutions for water resource management, is demonstrated. Taking into account the geographical structure of the canal, a Geographic Information System database was created, including digital, textual, and graphical maps. Based on this database, proposals and recommendations for improving water distribution management in the irrigation system are presented.
canal, stream, distribution, geographic information technology
CONTROLLED ASYNCHRONOUS GENERATORS UNDER VARIABLE WIND AND WATER FLOW SPEEDS
This article discusses the possibilities of parallel operation of an asynchronous generator, in particular, asynchronous generators with a phase rotor, which are controlled by changing the wind speed and water ﬂow. In addition, voltages, currents and connections of magnetic ﬂuxes of the stator and rotor phases are expressed as a matrix. The power and torque of the asynchronous generator, speed control methods, and the time constant function of the PID controller are presented. The structural diagram of the wind power plant and the results of research on changing the value of the additional resistance of the rotor winding of an asynchronous generator with a phase rotor with a power of 2.2 kW using a simulation model at different wind speeds are presented.
asynchronous generator with a phase rotor, wind power plant, PID controller, magnetic ﬂux, reactive and active power, reactance, moment of inertia.
ROLE AND IMPORTANCE OF PUMPED STORAGE POWER PLANTS IN ENERGY SYSTEMS
The article presents an analysis of the main technical and economic indicators of energy storage methods in global energy systems, as well as the results of forecasting energy storage capacity indicators. The advantages and effciency of pumped-storage hydroelectric power plants among energy storage systems are demonstrated, the conditions for their use in our Republic are outlined, and analytical data on forecasted power capacity indicators and their operating modes for balancing the daily load schedule of the energy system are provided
pumped storage power plants, fuel quantity, energy system, electricity storage, energy storage devices, power redistribution method
MODELING THE OPERATING MODES OF AN ASYNCHRONOUS GENERATOR WITH A WOUND ROTOR UNDER VARIABLE WIND SPEED
The article examines the operation of an asynchronous machine with a wound rotor in generator mode. It was demonstrated that even at low wind speeds, a certain amount of electrical energy can be generated by connecting additional resistance to the rotor circuit, particularly at low wind speeds. The study investigated the theory of electromagnetic and electromechanical transient processes in an asynchronous generator with a wound rotor, mathematical approximation, the Runge-Kutta method for solving second- and third-order differential equations, and modeling the operating modes of an asynchronous generator with a wound rotor in the MatLab Simulink program
asynchronous generator with a wound rotor, modeling, wind speed, generator mode, engine mode, electromagnetic torque.
IMPROVING THE TECHNICAL SPECIFICATIONS OF CONCRETE LININGS FOR IRRIGATION CANALS
This article discusses excessive water losses in canals and the main factors that cause them, which is one of the most pressing issues at the moment. It includes predictions about defects in concrete canal linings that lead to excessive water loss, as well as the external and internal factors that cause them. Based on this, necessary formulations were developed for the correct selection of binders and other components to reduce the water permeability of concrete linings. Deformations caused by penetration in concrete linings were studied, and the use of reinforcement meshes was recommended to reduce these deformations. For the reinforcement of concrete linings, class A-111 and AKP-SP reinforcement connections were recommended, allowing for a comparison of their physical and mechanical properties. A comparative table demonstrated the feasibility of using composite reinforcement for concrete linings.
irrigation system, concrete lining, water permeability, Inlet deformations, composition, corrosion, cement, fttings, binder, fllers, capillary, structure, hydration.
ANALYSIS OF SMALL OSCILLATIONS IN COMPLEX ELECTRIC POWER SYSTEMS
The article develops a mathematical model of a multi-machine electric power system, allowing to conduct studies of static stability. The calculation of static stability of a regulated three-generator power system is carried out. As a result, the values of the roots of the characteristic equation of the system under study were calculated. The obtained results are in qualitative agreement with the results of classical studies, which is a consequence of the adequacy of the proposed model and the correct reﬂection of the dynamic processes occurring in the real system
electric power system, transient processes, automatic excitation controller, matrix spectrum, mode parameters
MONITORING AND ANALYSIS OF SHEAR DEFORMATIONS AT RESERVOIR DAMS USING GEODETIC METHODS
Shear deformation in reservoir dams is a factor affecting their stability and safety. This article examines the mechanisms of shear deformation, the factors that cause it, and the methodologies for observing and analyzing these deformations. By understanding shear deformation, engineers can implement effective geodetic monitoring and engineering strategies to reduce the risks associated with dam failures.
reservoir, dam, shear deformation, stability, safety, geodetic monitoring, technical strategies, failures, deformation analysis, mechanism, graphical modeling.
TECHNICAL SPECIFICATIONS OF THE SENSOR FOR MEASURING ANGULAR DISPLACEMENTS OF THE ROTARY MECHANISMS OF GATES
This article discusses the problems encountered when measuring the angular displacement of rotating parts in mechanisms used in agriculture and water management, the causes of these problems, the physical and technical phenomena that arise during such measurements, as well as the various operating modes required for these measurements. Existing measuring transducers are analyzed, and the main requirements for these transducers are presented.
agriculture, water management, rotating mechanism, angular displacement, measurement, converter.
INVESTIGATION OF UNSTEADY FILTRATION IN HOMOGENEOUS COASTAL MASSIFS OF RESERVOIRS AND CANALS
The article presents data on determining unsteady fltration in homogeneous coastal massifs of reservoirs and canals with a decrease in the water level in the upper pool using numerical and experimental methods. A method for modeling unsteady fltration and similarity criteria for studying the model in soil trays are presented. The calculation results are compared with the results of experimental studies The experimental studies of the processes under consideration on physical models showed good convergence of experimental data with the results of numerical calculations
fltration, unsteady fltration, rapid decrease in the water level in the upper stream, the rate of water level decrease, the method of fnite differences of the coastal massif, fltration coeffcient, water recovery coeffcient, slope stability, soil tray.
JSC «UZBEKHYDROENERGO»: RESULTS – PERFORMANCE
The article is presented in the format of an analytical-critical report, which critically analyzes the work carried out in the frst quarter of 2025 by the “Uzbekhydroenergo” joint-stock company in the areas of electricity production, investment projects, localization, industrial cooperation, and construction-installation activities, based on digital indicators. The necessity and stages of purposefully and effectively organizing activities within the system, as well as achieving priority tasks outlined in state programs, are highlighted.
hydropower programs, electricity generation, effective indicators, investment projects, production capacities, modernization, green development
IMPROVING THE EFFICIENCY OF THE USE OF HYDROELECTRIC POWER PLANTS OF THE REPUBLIC OF UZBEKISTAN IN FRUIT AND VEGETABLE STORAGE WAREHOUSES
On the basis of the need to optimally regulate the production and consumption of electricity in the Republic of Uzbekistan by high­maneuverable HPPs and PSPPs in the consumption of electricity for fruit and vegetable storage warehouses, their participation in the regulation of the energy production process was analyzed on the example of a graph of the daily load of the energy system. By solving the problem of optimal distribution of loads between Hydro and thermal power plants during the day, taking into account the maximum use of limited water resources for fruit and vegetable storage , a method for determining the energy production characteristics of power plants has been analyzed and recommendations for use are proposed
Fruit and vegetable storage, electricity, energy system, hydroelectric power plant, water consumption, fuel consumption, fruit and vegetable storage warehouses daily loading schedule, power of the power plant, electricity consumption.
THE CHALLENGES OF IMPLEMENTING SOCIAL PUBLIC PROCUREMENT IN DEVELOPING COUNTRIES
The introduction lays the groundwork for understanding the multifaceted nature of public procurement, highlighting its evolving role beyond mere fnancial goals toward achieving broader social, economic, and environmental objectives. It introduces the concept of “social public procurement” as a means to leverage purchasing authority for positive societal impacts, citing examples from various countries and scholarly works. The thesis statement focuses on investigating the challenges of implementing social public procurement (SPP) in developing countries, emphasizing the signifcance of understanding these challenges for promoting sustainable development and reducing inequality. The subsequent sections provide a comprehensive review of institutional theory, the concept of social public procurement, challenges faced in implementation, and case studies from Ghana, Kenya, and Bangladesh, offering a detailed analysis of barriers and potential strategies for overcoming them. The conclusion summarizes the key challenges identifed and proposes recommendations to address them, stressing the importance of regulatory strengthening, capacity building, and awarenessraising initiatives for fostering responsible procurement practices globally. Overall, the introduction and subsequent sections provide a thorough overview of the research topic, setting the stage for a comprehensive examination of the complexities surrounding social public procurement in developing nations.
Public procurement, Social public procurement (SPP), Best value for money (BVM), Social linkages, socially responsible public procurement (SRPP), Affrmative action programs, Set­aside programs, Institutional frameworks, Environmental Preferable Purchasing Program (EPPP), Sustainable Public Procurement Program (SPPP), Employment, Social value, Sustainable development, Inequality, Capacity building, Transparency, Corruption, Poverty, Political inﬂuence.