JournalTOCs

Power Technology and Engineering
Journal Prestige (SJR): 0.204

Number of Followers: 3

Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1570-145X - ISSN (Online) 1570-1468
Published by Springer-Verlag

[2467 journals]

Operation of the DC Link in the Conditions of Poor Quality of Grid Power
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  Abstract: The HVDC link at the Trans-Baikal Converter Complex at the 220 kV Mogocha Substation operates under conditions of poor quality of power in the grid. Distortions in a grid are characterized by values of the negative-sequence voltage unbalance factor and voltage THD that are many times higher than the rated values. The operation of STATCOMs, which are part of the HVDC link, has a beneficial effect on the quality of power across the 220 kV buses of the Mogocha Substation. However, a STATCOM is additionally loaded by negative-sequence currents and higher-harmonic currents. A mathematical model was developed and calculations were carried out for various modes of operation to estimate the available power output of the HVDC link in conditions of poor quality of grid power.
  PubDate: 2023-03-16
Application of the Ship Propulsion Action for Various Engineering Tasks
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  Abstract: An analysis of methods for solving various problems connected with erosion due to the action of ship propulsors is presented. The results of the study can be used for the removal of oil drops from under ice including when using sediments for refloating ships with the jets produced by vessel propulsors, as well as for limiting the operation mode of propulsors in aquatic areas for averting their secondary pollution.
  PubDate: 2023-03-11
Technical Problems Affecting Irrigation Systems in Southern Russia:
Transformation of Irrigation Management
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  Abstract: A presented analysis of the technical condition of land-reclamation systems in southern Russia indicates an increase in the physical wear of irrigation systems from an average of 77% in 2013 to 82% in 2020. The problems of increasing the operational efficiency and a technical condition of irrigation systems under the transition to the contemporary technological level of integral irrigation management are examined. Based on the comparative analysis of domestic and foreign practice, proposals on the improvement and development of the irrigation management model are given.
  PubDate: 2023-03-11
Inverters for Technological Development of Russia’s Energy Sector
and Industry
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  Abstract: The article discusses the main directions of the development of converter equipment in Russia and worldwide. Major global trends in the development of converter equipment are assessed through the scope of priorities for technological development of the Russia’s energy sector. The main areas of application are analysed and the local inverter market is investigated, specifically in electric transport, solar and wind power generation, distributed smart power systems, including energy storage systems. Inverters are decomposed in minute detail, specifically in terms of the critical technologies and an electronic component base that need to be developed in Russia. Creation of advanced modules for inverters in Russia is exemplified with an ongoing project of developing and establishing a production of specialized IGBT modules in MIDA body. Certain suggestions as to development of production of converter equipment in Russia through the cooperation of the state and the private sector are made.
  PubDate: 2023-03-11
Operation of Current Protection for the Zero Sequence of Overhead Electric
Power Transmission Lines Taking the Circuit for Ice Melting on its
Lightning-Protection Cables into Account
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  Abstract: Brief information is provided on circuits for melting of ice on the lightning protection cables of overhead power transmission lines (OHL) and on the choice of arrangements for the last stage of zero-sequence current protection (ZSCP) on OHL. The operating parameters of circuits for the melting of ice on lightning protection cables of a specific 500 kV OHL are calculated: “cable – ground,” “two cables – ground,” and “cable – ground, with a second grounded cable.” An experiment was conducted on this 500 kV OHL to measure the operating regime parameters during melting of ice on its lightning protection cable in a “cable – ground” circuit, with the possibility of excessive operation of stage IV of the directed ZSCP for this 500 kV OHL taken into account. Measures are proposed for prevention of excessive operation of the last stage of the ZSCP during melting on the lightning protection cables of this 500 kV OHL.
  PubDate: 2023-03-11
Physical Modeling of the Projected Marine Terminal of the Nakhodka Mineral
Fertilizer Plant
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  Abstract: The work presents the experimental studies on the propagation of wind waves in the open water area of the designed marine terminal. The results of these studies conducted based on physical modeling are presented.
  PubDate: 2023-03-10
Influence of Volumetric Loading of Rocks Surrounding Underground Chambers
on the Relaxation of Self-Stressed Aleurolite Massif
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  Abstract: The paper analyzes the reasons for the long-term convergence of the wall in the turbine hall and transformer room of the Rogun HPP. Data on the anomalous behavior of aleurolite both in the massif and samples are provided. The results of monitoring the effectiveness of reinforcing cementation at the test site are presented.
  PubDate: 2023-03-10
Main Technical Solutions for Controlling the Drainage of Surface and
Ground Waters in Drainage Systems
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  Abstract: The paper considers the issues of controlling the surface and ground water drainage in combined drainage-irrigation systems. The most common ways of regulating the drainage of surface waters, aimed at preventing the land waterlogging, creating conditions for timely agrotechnical measures, and protecting the soil from erosion, are represented. The main directions of developments associated with the control of the ground water level under non-black earth conditions are shown.
  PubDate: 2023-03-10
Transformer Oil Degradation Mechanisms
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  Abstract: For the first time, a wide range of modern physicochemical methods was used to perform a systematic study of the transformer oil degradation processes. The formation of aromatic compounds in oil with their subsequent aggregation and precipitation has been demonstrated.
  PubDate: 2023-03-10
Experimental Determination of Hydrodynamic Resistance Coefficients and the
Lifting Force of Various Pipeline Crossing Methods
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  Abstract: This article presents the results of an experimental research on the water flow implication of pipeline crossing models. The coefficients of the hydrodynamic resistance and lifting force were determined for pipelines laid along the bottom at different angles to the oncoming flow, embedded in the bottom of a watercourse at different depths, and protected by flexible concrete pavement. Furthermore, the test results of research on the turbulent flow force impact on various types of pipeline crossings were analyzed.
  PubDate: 2023-03-09
Experience of Designing 110 kV Overhead Lines in the Arctic Zone of the
Russian Federation (Pevek – Bilibino, Chukotka Autonomous Okrug)
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  Abstract: The experience of designing 110 kV overhead lines in the Arctic zone of the Russian Federation (Pevek – Bilibino, Chukotka Autonomous Okrug) is described.
  PubDate: 2023-03-09
Kulanak Hydroelectric Power Station on the Naryn River in the Kyrgyz
Republic: Design Features
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  Abstract: Information is given about the design features of the Kulanak hydroelectric power station on the Naryn river in the Kyrgyz Republic.
  PubDate: 2023-03-09
Detergent Composition for Cleaning the Internal Surfaces of Condenser
Tubes of Steam Turbines of Thermal Power Plants of All Types From Deposits
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  Abstract: A new detergent composition for cleaning deposits from the internal surfaces of condenser tubes has been developed, which has a high cleaning efficiency, provides complete removal of the deposits, as well as an expansion of the assortment of products for cleaning equipment from the deposits. Experimental studies were carried out using a test bench in accordance with the developed programs and test procedures, and their results were analyzed.
  PubDate: 2023-03-09
Investigation of the Possibility of Increasing the Unit Capacity of the
Sayano-Shushenskaya HPP
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  Abstract: The article presents the information on the investigation of the possibility of increasing the unit capacity of the Sayano-Shushenskaya HPP hydraulic unit.
  PubDate: 2023-03-09
Optimization of Design Solutions and Structural Improvement of the Main
Facilities of the Ust-Srednekanskaya HPP
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  Abstract: The history of the design and construction of the Ust-Srednekanskaya HPP in the Magadan Region is briefly reviewed. The reasons for and results of design works intended to update the project documentation for the main facilities of the hydraulic project are described.
  PubDate: 2023-03-09
Investigation of Measures on Steam Temperature Adjustment in the Process
Extraction of a Steam Turbine
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  Abstract: The article provides a computational analysis and comparison of the thermal efficiency of various measures for adjusting the steam temperature during the process steam extraction (P-extraction). Methods for adjusting the steam temperature in the P-extraction are presented following the given initial conditions for a specific version of a steam turbine plant.
  PubDate: 2023-03-09
Assessment of a Positive Effect from Water Reservoir Use by Decrease of
Negative Water Impact by the Example of Floods in the Years 2019 – 2021
in the Catchment of the Amur River
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  Abstract: An analysis is done of the effect of the Zeya, Bureya, and Lower Bureya reservoirs on the conditions for passing the flood waters of 2019 – 2021 in the Amur River basin. Apreliminary estimate is given for the flood protection effect of the introduction of advanced HPPs with reservoirs on the tributaries of the Amur River.
  PubDate: 2023-03-09
Validation of Numerical Calculations of Electromechanical Transient
Processes When Assessing the Stability of Electric Power Systems Using
Renewable Energy Sources
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  Abstract: The widespread introduction of renewable energy sources (RES) into modern electric power systems (EPS) significantly changes their dynamic properties. EPS stability issues arise due to the properties of non-synchronous generating units (GU) based on RES with power converters (PC), which are fundamentally different from conventional synchronous generation. Mathematical modeling of EPS stability issues is currently performed by purely numerical calculation of electromechanical transients in which various simplifications and limitations are applied based on the development and modification “generic” mathematical models of EPS-based GUs with PCs. In the present study, stability calculations of EPS with GU based on RES with PC reveal the impact of the applied simplifications and constraints in the purely numerical calculation of electromechanical transients on the quality of the solution of problems of stability evaluation of EPS with RES. Areas of application of the modified GU model based on RES with PC as part of the EPS model of real dimensionality are identified at which the largest and smallest errors occur, along with their causes. Such “all-mode” verification becomes feasible due to the alternative approach proposed in the article, which is based on the use of a model benchmark instead of field data.
  PubDate: 2023-03-09
Routing of Floods of Rare Occurrence in the Valley of the Sulak River at
the Facilities of the Dagestan Branch
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  Abstract: The article presents flood parameters in the valley of the Sulak and Andiiskoe Koisu Rivers. The main parameters of the Gotsatlinskaya HPP, the Irganaiskaya HPP, and the Chirkeiskaya HPP and the parameters of water reservoirs, as well as their participation in flood routing, are presented. The operation of hydraulic structures (HS) during flood routing has been assessed. The article concludes on the importance of hydraulic complexes during flood routing and assesses the HS state.
  PubDate: 2023-03-09
Change in Efficiency of Flow Path of Modernized and Non-Modernized
Turbines Having a Capacity of 300 MW During Operation
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  Abstract: The results of changes in the thermal efficiency of high-pressure cylinders (HPC) of active and reactive types, as well as intermediate-pressure cylinders (IPC) with stages of an improved design of turbines with a capacity of 300 MW produced by LMZ during long-term operation are presented on the example of Konakovskaya regional hydroelectric power plant (GRES). Recommendations are made regarding the possible use of the proposed technical solutions in power plants with similar turbines.
  PubDate: 2023-03-09