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Study of Specific Reliability Indicators of 0.4 kV Power Networks 0.4 kV电网具体可靠性指标研究
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-03-11 DOI: 10.1134/S1063784225700604
A. V. Vinogradova, A. V. Vinogradov, A. V. Bukreev
{"title":"Study of Specific Reliability Indicators of 0.4 kV Power Networks","authors":"A. V. Vinogradova,&nbsp;A. V. Vinogradov,&nbsp;A. V. Bukreev","doi":"10.1134/S1063784225700604","DOIUrl":"10.1134/S1063784225700604","url":null,"abstract":"<p>The reliability of power supply determines the operation of power networks. The literature reviews have revealed that insufficient attention is paid to the research of specific reliability indices necessary for planning and evaluation of energy saving efficiency. Therefore, the purpose of the work is to study the specific reliability indicators of 0.4 kV power networks. Among the analyzed indicators, we consider the flow of failures, the flow of intentional outages, specific values of disconnected power and undersupply of electricity, and others. The authors have analyzed statistical data on emergency and planned outages of 0.4 kV power networks in the Orel region over the period 2018–2023. In total, 12 787 overhead power lines with a total length of more than 10 thousand kilometers have been examined. Based on the analysis, the authors identify the values of specific reliability indicators and trends in their changes over 6 years and analyze probable reasons for these changes. It has been revealed that the values of the failure flow parameters do not exceed the reference values until 2022 inclusive, and in 2023, they exceed the reference values by 1.2 times. In 2022–2023, there was a significant increase in the number of both emergency and intentional (planned) outages; the flow of failures per 100 km of 0.4 kV lines in 2023 was 29 per year, and intentional outages constituted 71 per year. The values of specific disconnected power per outage decreased by 17.5 times in 2023 as compared to 2018, the average value per outage was 0.0009 MW. The specific value of undersupply of electricity per consumer per year is in the range between 1 and 5.7 MWh/consumer for emergency shutdowns, and 3 to 8.1 MW h/consumption, according to the new plan. Specific reliability indices allow assessing the efficiency of 0.4 kV distribution networks in a particular region and can be used in assessing the effect of implementing measures to improve the reliability of power supply.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 1","pages":"39 - 44"},"PeriodicalIF":0.7,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the Electrical Strength of the Accelerating Gap in a Forevacuum Plasma Electron Source 前真空等离子体电子源加速间隙的电强度研究
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-03-11 DOI: 10.1134/S106378422560122X
V. A. Burdovitsin, L. J. Ngon A Kiki, E. M. Oks, F. A. Sukhovolsky
{"title":"On the Electrical Strength of the Accelerating Gap in a Forevacuum Plasma Electron Source","authors":"V. A. Burdovitsin,&nbsp;L. J. Ngon A Kiki,&nbsp;E. M. Oks,&nbsp;F. A. Sukhovolsky","doi":"10.1134/S106378422560122X","DOIUrl":"10.1134/S106378422560122X","url":null,"abstract":"<p>Some aspects determining the electrical strength of the accelerating gap in a fore-vacuum-pressure plasma-cathode electron beam source utilizing helium and argon as the working gas were explored. Penetration of plasma into the accelerating gap is the cause of breakdown. We find that gap breakdown occurs at larger emission hole diameter and at higher plasma density in helium than in argon. The greater stability of the plasma boundary in helium is explained by the observed greater anode potential drop and consequently greater sheath thickness.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"71 1","pages":"25 - 28"},"PeriodicalIF":0.7,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147388531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation of Methane–Hydrogen Jet Flame 甲烷-氢射流火焰模拟
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700501
A. A. Dekterev, Ar. A. Dekterev
{"title":"Simulation of Methane–Hydrogen Jet Flame","authors":"A. A. Dekterev,&nbsp;Ar. A. Dekterev","doi":"10.1134/S1063784225700501","DOIUrl":"10.1134/S1063784225700501","url":null,"abstract":"<p>A mathematical model is developed to calculate methane–hydrogen jet flame. Modern gas turbine engines use hydrocarbon fuel, emitting significant amounts of greenhouse gases into the atmosphere. Usage of hydrocarbon–hydrogen fuel mixture significantly reduces CO<sub>2</sub> emission but significantly alters combustion processes. Comprehensive mathematical simulation of aerodynamics, heat and mass transfer, and combustion processes is needed to optimize the design and working modes of burners. The models of these processes validated and selected using previous results for several types of flames are presented. Simulated results are in good agreement with laboratory experimental data with respect to both flow characteristics and concentrations of gas components.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"602 - 609"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of the Potential Wind Power Capacity in the Urban Environment 城市环境中潜在风力发电容量的估算
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700586
D. A. Dekterev, K. Y. Litvintsev, S. A. Filimonov, V. D. Meshkova
{"title":"Estimation of the Potential Wind Power Capacity in the Urban Environment","authors":"D. A. Dekterev,&nbsp;K. Y. Litvintsev,&nbsp;S. A. Filimonov,&nbsp;V. D. Meshkova","doi":"10.1134/S1063784225700586","DOIUrl":"10.1134/S1063784225700586","url":null,"abstract":"<p>The urban environment considerably influences aeration conditions, specifically, the formation of local high wind velocity areas, which may be used for wind power generation. Aeration conditions depend not only on the geometrical parameters of the urban environment but also on thermal processes due to solar and thermal radiations. Therefore, high wind velocity areas may be unstable. In this article, numerical simulation data for urban area zoning to estimate the wind power potential are presented. The incipience features of high wind velocity areas are considered using a particular housing estate as an example, and their variation with time of day is shown. The most favorable places for wind power plant (wind turbine) installation in the urban environment are indicated.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"653 - 658"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical Simulation of Anti-Icing Devices for the Water Area of Northern Harbors 北方港口水域防冰装置的数值模拟
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700537
D. V. Platonov, A. V. Minakov, Ar. A. Dekterev
{"title":"Numerical Simulation of Anti-Icing Devices for the Water Area of Northern Harbors","authors":"D. V. Platonov,&nbsp;A. V. Minakov,&nbsp;Ar. A. Dekterev","doi":"10.1134/S1063784225700537","DOIUrl":"10.1134/S1063784225700537","url":null,"abstract":"<p>We present numerical analysis of an anti-icing device designed for water areas of Northern harbors in the Arctic zone. The operation principle of this device is based on thermal destrution of the ice coating using the heat of depth water. We consider a propeller device producing a directed kinetic flow in the form of a jet. The basin surface is cleaned from ice due to the involvement of lower warmer layers into the flow and their contact with ice. It is shown with the help of numerical modeling that the application of this device ensures the ice-free surface for safe work of sea harbors located in Northern latitudes.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"625 - 633"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for Stabilizing Pulverized Coal-Fired Boiler Operation at Low Loads in a Wind-Powered System 风电系统中煤粉锅炉低负荷稳定运行的方法
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700525
V. A. Kuznetsov, D. M. Bozheeva, Sh. O. Maadyr-ool, A. A. Dekterev
{"title":"Method for Stabilizing Pulverized Coal-Fired Boiler Operation at Low Loads in a Wind-Powered System","authors":"V. A. Kuznetsov,&nbsp;D. M. Bozheeva,&nbsp;Sh. O. Maadyr-ool,&nbsp;A. A. Dekterev","doi":"10.1134/S1063784225700525","DOIUrl":"10.1134/S1063784225700525","url":null,"abstract":"<p>Changing the operating power of a pulverized coal-fired boiler can be an important tool to compensate for fluctuations in wind generation and stabilize power system. Pulverized coal-fired boilers were originally designed for baseload operation but technical modernization and application of new technologies and improved control systems make it possible to use them in balancing power lines with a relatively high contribution of renewable energy sources. A BKZ-540-140-1 boiler serves as an example in a numerical study of the effect of blast oxygen concentration on coal dust combustion processes and ignition stability at low loads. An increase in the blast oxygen concentration stabilizes ignition and increases the efficiency of coal combustion in the boiler. Analysis of the calculated results shows that increasing the oxygen concentration at low-critical loads allows for a localized increase in temperature, which contributes to a reduction in flame size. An increase in the oxygen concentration by 5 and 10% leads to a reduction in the heat loss with flue gas by 13.5 and 20.5%, respectively.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"619 - 624"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Measurement Complex for Studying the Thermophysical Characteristics of the Yenisei River Downstream of the Krasnoyarsk Hydroelectric Power Station Dam 研究克拉斯诺亚尔斯克水电站大坝下游叶尼塞河热物性的测量综合体
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700550
V. V. Zavoruev, A. V. Dergunov, K. V. Krasnoshchekov, O. E. Yakubailik
{"title":"A Measurement Complex for Studying the Thermophysical Characteristics of the Yenisei River Downstream of the Krasnoyarsk Hydroelectric Power Station Dam","authors":"V. V. Zavoruev,&nbsp;A. V. Dergunov,&nbsp;K. V. Krasnoshchekov,&nbsp;O. E. Yakubailik","doi":"10.1134/S1063784225700550","DOIUrl":"10.1134/S1063784225700550","url":null,"abstract":"<p>Using a specialized measuring system, a systematic study of the Yenisei River’s thermophysical characteristics downstream of the Krasnoyarsk Hydroelectric Power Station was conducted. Key patterns in the annual thermal regime between 2021 and 2025 were identified. Previously unknown irregular water temperature fluctuations (with an amplitude of up to 8°C) were discovered in late summer and autumn. It was also established that, at a distance of 40 km from the dam, the water warms by +2°C in summer and cools by –2°C in winter, indicating a seasonal inversion of the river’s heat balance recovery rate.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"640 - 645"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Issue Dedicated to the “Yenisei Thermal Physics 2025” All-Russian Forum “叶尼塞热物理2025”全俄论坛专刊
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700598
A. A. Dekterev, S. V. Ryzhkov
{"title":"Issue Dedicated to the “Yenisei Thermal Physics 2025” All-Russian Forum","authors":"A. A. Dekterev,&nbsp;S. V. Ryzhkov","doi":"10.1134/S1063784225700598","DOIUrl":"10.1134/S1063784225700598","url":null,"abstract":"","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"583 - 584"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Measurement and Analysis of Vertical Temperature Profiles of the Atmosphere over the Yenisei River and the Urbanized Area of Krasnoyarsk 叶尼塞河和克拉斯诺亚尔斯克市区大气垂直温度廓线的测量与分析
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700549
O. E. Yakubailik, V. V. Zavoruev, T. V. Yakubailik
{"title":"Measurement and Analysis of Vertical Temperature Profiles of the Atmosphere over the Yenisei River and the Urbanized Area of Krasnoyarsk","authors":"O. E. Yakubailik,&nbsp;V. V. Zavoruev,&nbsp;T. V. Yakubailik","doi":"10.1134/S1063784225700549","DOIUrl":"10.1134/S1063784225700549","url":null,"abstract":"<p>Vertical temperature profiles were measured from 2022 to 2024 using two meteorological instruments installed in urban areas and on an island in the Yenisei River. The analysis is based on calculation of the temperature difference (Δ<i>T</i> = <i>T</i>above_land – <i>T</i>above_river) at different altitudes. The key result is the seasonal dependence of the vertical distribution of quantity Δ<i>T</i>. In winter, Δ<i>T</i> is statistically significantly negative in the surface layer (0–50 m), while it is positive above 100 m. In summer, an opposite scenario is observed: positive Δ<i>T</i> values at the surface are changed by negative values in the 150–1000 m layer. A general regularity is the sign change of Δ<i>T</i> at altitudes of up to 200 m, indicating a combination of two, as yet unidentified, factors.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"634 - 639"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Approach to the Development of Devices for Gas Removal from Aluminum Prebaked-Anode Electrolysis Cells Based on Experimental Studies and Computer Modeling 基于实验研究和计算机模拟的铝预焙阳极电解槽气体去除装置的研制
IF 0.7 4区 物理与天体物理
Technical Physics Pub Date : 2026-02-20 DOI: 10.1134/S1063784225700513
P. A. Neob’’yavlyayushchii, A. A. Dekterev
{"title":"An Approach to the Development of Devices for Gas Removal from Aluminum Prebaked-Anode Electrolysis Cells Based on Experimental Studies and Computer Modeling","authors":"P. A. Neob’’yavlyayushchii,&nbsp;A. A. Dekterev","doi":"10.1134/S1063784225700513","DOIUrl":"10.1134/S1063784225700513","url":null,"abstract":"<p>The paper presents an approach to developing new devices for gas removal from prebaked-anode electrolysis cells. This approach is based on comprehensive experimental and computational studies of the aerodynamics of lightly dusted gas flows in existing gas removal systems. The results of natural and computational experiments are presented, and the operating parameters of existing gas removal systems are analyzed, revealing the advantages and disadvantages of various collector duct designs. An approach for designing new gas removal systems is proposed. A method for organizing gas removal from electrolysis cells placed both longitudinally and transversely in the potroom has been developed. This method ensures uniform gas extraction from the potroom, reduces dust carryover into the gas removal system, facilitates easy cleaning of the structure from dust deposits, and reduces hydraulic resistance.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"70 :","pages":"610 - 618"},"PeriodicalIF":0.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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