scholarly journals Increasing the reliability of electrical equipment in the agricultural and industrial complex based on measuring the electrical capacitance of capacitors

2021 ◽  
Vol 273 ◽  
pp. 07029
Author(s):  
Vladimir Vorzhev ◽  
Nikolay Rudenko ◽  
Pavel Malko ◽  
Vladimir Dergousov
Keyword(s):  
Theoretical Foundation ◽  
Electric Circuit ◽  
Electrical Equipment ◽  
Industrial Complex ◽  
Measuring Device ◽  
Smoothing Filter ◽  
Electric Capacitance ◽  
Industrial Complexes ◽  
Measurement Mode ◽  
The Given

The article presents elaborated technical suggestions for increasing reliability of electrical equipment of agro-industrial complexes. The analysis of the already known ways of measuring electric capacitance is carried out and it demonstrates the necessity of withdrawing a capacitor from a working circuit for sufficient accuracy of determining electric capacitance. The urgency of developing a method for measuring electric capacitance without removing the capacitor from а working circuit to reduce the average recovery time is shown. Theoretical foundation of the possibility to measure electric capacitance without a capacitor being withdrawn from a working circuit in smoothing filter mode is worked out; a structural electric circuit of an electric capacitance measuring device is elaborated and the principle of its operation is described; methods of measurement by means of the given device are elaborated; conditions for creating and maintaining the measurement mode of the device are substantiated. The validity of the received results is checked with the help of the programmed package Mathcad, as well as on electric models of the main blocks of the device. The obtained results can be used to measure electric capacitance of electrolytic capacitors during maintenance and electrical equipment renovation and also can promote its reliability.

The Washington Consensus, liberal ideas and terms of the military-technological policy

2020 ◽  
Vol 16 (11) ◽  
pp. 2103-2123
Author(s):  
V.L. Gladyshevskii ◽  
E.V. Gorgola ◽  
D.V. Khudyakov
Keyword(s):  
United States ◽  
Production Management ◽  
Developed Countries ◽  
The United States ◽  
Internal Quality ◽  
Industrial Complex ◽  
Active Involvement ◽  
Military Industrial Complex ◽  
Industrial Complexes ◽  
The Military

Subject. In the twentieth century, the most developed countries formed a permanent military economy represented by military-industrial complexes, which began to perform almost a system-forming role in national economies, acting as the basis for ensuring national security, and being an independent military and political force. The United States is pursuing a pronounced militaristic policy, has almost begun to unleash a new "cold war" against Russia and to unwind the arms race, on the one hand, trying to exhaust the enemy's economy, on the other hand, to reindustrialize its own economy, relying on the military-industrial complex. Objectives. We examine the evolution, main features and operational distinctions of the military-industrial complex of the United States and that of the Russian Federation, revealing sources of their military-technological and military-economic advancement in comparison with other countries. Methods. The study uses military-economic analysis, scientific and methodological apparatus of modern institutionalism. Results. Regulating the national economy and constant monitoring of budget financing contribute to the rise of military production, especially in the context of austerity and crisis phenomena, which, in particular, justifies the irrelevance of institutionalists' conclusions about increasing transaction costs and intensifying centralization in the industrial production management with respect to to the military-industrial complex. Conclusions. Proving to be much more efficient, the domestic military-industrial complex, without having such access to finance as the U.S. military monopolies, should certainly evolve and progress, strengthening the coordination, manageability, planning, maximum cost reduction, increasing labor productivity, and implementing an internal quality system with the active involvement of the State and its resources.

Two-Phase Short Circuit in the Power Grid Powered by a Transformer with a Y/Δ-11 Winding Connection

2020 ◽  
pp. 25-30
Author(s):  
Aleksandr S. Serebryakov ◽  
Vladimir L. Osokin ◽  
Sergey A. Kapustkin
Keyword(s):  
High Speed ◽  
Short Circuit ◽  
Relay Protection ◽  
Electric Circuit ◽  
Operational Reliability ◽  
Research Purpose ◽  
Industrial Complex ◽  
Two Phase ◽  
Short Circuit Currents ◽  
Secondary Winding

The article describes main provisions and relations for calculating short-circuit currents and phase currents in a three-phase traction transformer with a star-triangle-11 connection of windings, which feeds two single-phase loads in AC traction networks with a nominal voltage of 25 kilovolts. These transformers provide power to the enterprises of the agro-industrial complex located along the railway line. (Research purpose) The research purpose is in substantiating theoretical equations for digital intelligent relay protection in two-phase short circuits. (Materials and methods) It was found that since the sum of instantaneous currents in each phase is zero, each phase of the transformer works independently. We found that this significantly simplifies the task of analyzing processes with a two-phase short circuit. In this case, the problem of calculating short-circuit currents in the traction network can be simplified by reducing it to the calculation of an ordinary electric circuit with three unknown currents. (Results and discussion) The article describes equations for calculating short-circuit resistances for one phase of the transformer when connecting the secondary winding as a star or a triangle. The currents in the phases of the transformer winding at short circuit for the star-triangle-11 and star-star-with-ground schemes are compared. It was found that when calculating short-circuit currents, there is no need to convert the secondary winding of the traction transformer from a triangle to a star. (Conclusions) It was found that the results of the research can be used in the transition of relay protection systems from electromagnetic relays to modern high-speed digital devices, which will increase the operational reliability of power supply systems for traction and non-traction power consumers.

scholarly journals A 10-Year Analysis on the Reduction of Particulate Matter at the Green Buffer of the Sihwa Industrial Complex

2021 ◽  
Vol 13 (10) ◽  
pp. 5538
Author(s):  
Sin-Yee Yoo ◽  
Sumin Choi ◽  
Namin Koo ◽  
Taehee Kim ◽  
Chan-Ryul Park ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Reduction Rate ◽  
Field Measurements ◽  
Environmental Research ◽  
Continuous Measure ◽  
Industrial Complex ◽  
Residential Areas ◽  
Pm10 And Pm2.5 ◽  
Industrial Complexes ◽  
Pollutant Sources

Green buffer (GB) zones are designed to prevent the spread of air pollutants and odors from industrial complexes (ICs) to residential areas (RAs). We analyzed changes in the concentration of particulate matter (PM) and the number of high PM pollution days for 10 years after the GB was implemented, using the National Atmospheric Environmental Research Stations 2001–2018 dataset. We also performed field measurements of PM10 and PM2.5 from February 2018 to January 2019 to analyze the PM concentrations at human breathing height throughout the GB. Before GB implementation (2001–2006), PM10 in the RA was 9% higher than that in the IC. After GB zone implementation (2013–2018), PM10 in the RA was 11% lower than that of the IC. Furthermore, the PM concentration in the RA (slope = ∆Concentration/∆Time, −2.09) rapidly decreased compared to that in the IC (slope = −1.02) and the western coastal area (WCA) (slope = −1.55) over the 10-year period. At PM concentrations at human breathing height, PM10 and PM2.5 in the RA were lower than those in the IC by 27% and 26%, respectively. After GB implementation, the wind speed was positively correlated but SOx was negatively correlated with the PM reduction rate at a local scale. These results show that there was a reduction of PM during and after GB implementation, implying the need for proper management of GBs and continuous measure of pollutant sources at the green buffers of industrial complexes.

scholarly journals Greening by grain waste recycling in cereal industry

2020 ◽  
Vol 161 ◽  
pp. 01098
Author(s):  
Roza Dyganova ◽  
Alena Gordeeva
Keyword(s):  
Western Europe ◽  
Waste Recycling ◽  
Technical Solution ◽  
Industrial Complex ◽  
Plant Materials ◽  
Grain Processing ◽  
Poultry Feeding ◽  
Solid Liquid ◽  
The Given ◽  
Cereal Industry

Ecologically feasible ways of cereal wastes recycling are considered and their comparative analysis is carried out. The description of granulation methods for waste is especially investigated and the most effective technical solution for the studied elevator is proposed. Grain wastes of category III are not suitable for cattle and poultry feeding, therefore, they are stored in the territories adjacent to a grain processing enterprise for a certain time, and then they are taken to the landfill or burnt. The wastes include the wastes from the process of grain cleaning with the grain content of not more than 2% and with the presence of straw particles - buckwheat, oats, barley and suction husks, scouring black dust. The given waste type of elevator has properties that make it possible to use them as a secondary material resource. Their recycling acquires an important environmental, economic and energy-saving significance. In Western Europe, the use of solid fuels - granules and briquettes - has become widespread. The main types of plant-growing subcomplex wastes in agro-industrial complex, which are used for solid, liquid or gaseous biofuels production, are straw, cut and husk of cereals crops, peeling, corn shell, flax bonfire and other plant materials.

Assessment and improvement of competitiveness of industrial complex

2020 ◽  
Vol 30 (5) ◽  
pp. 611-633
Author(s):  
Vadim Krivorotov ◽  
Alexey Kalina ◽  
Vasiliy Tretyakov ◽  
Sergey Yerypalov ◽  
Anna Oykher
Keyword(s):  
Resource Constraints ◽  
Electrical Equipment ◽  
Optimal Portfolio ◽  
Development Projects ◽  
Industrial Complex ◽  
Project Portfolio ◽  
Content Type ◽  
Methodical Approach ◽  
The Impact ◽  
Selection Of

Purpose The purpose of this study is to develop a model for the selection of optimal development projects for an industrial complex (IC), aimed at improving its competitiveness. Design/methodology/approach Selection of optimal projects for IC development is carried out within the framework of a methodical approach to assessing and forecasting the competitiveness of IC based on the phased implementation of the following steps: assessment of the current level of competitiveness of an IC; optimization of the project portfolio aimed at improving the IC competitiveness; forecasting the IC competitiveness. The methodology for assessing the IC competitiveness is based on a comparative analysis of its activities against those of its leading competitors and evaluates two integral characteristics, namely, the level of current competitiveness and the indicator of the competitive potential. The methodical approach to the selection of the optimal portfolio of projects for the development of competitiveness is based on a step-by-step optimization of the portfolio using a dynamic programming procedure, which takes into account the implementation conditions of the projects, resource constraints and the prioritization of these projects. The targeted benchmark for the optimization is an integral indicator of IC competitiveness, comprising various aspects of its activities. Findings Method for multi-factor evaluation of IC competitiveness and the impact of a set of factors driving competitive advantage; set of benchmarks of IC competitiveness; the model for the selection and step-by-step optimization of the portfolio of IC development projects, aimed at increasing competitiveness in the context of resource constraints. Practical implications Methodology described in this paper was used to assess the competitiveness and optimize the project portfolio of Uralelektrotyazhmash Group of Enterprises (UETM), one of the largest power engineering complexes in Russia. The assessment was carried out in comparison with the leading domestic and global manufacturers of electrical equipment, which form UETM’s primary competition in the marketplace. Originality/value The study establishes a method for the comprehensive assessment of IC competitiveness based on the comparison of IC activity indicators with those of leading competitors. The proposed method defines an integral competitiveness index to allow for the quantitative assessment of IC competitiveness, development of measures to improve IC competitiveness and producing a methodology to forecast the impact of such measures; the study proposes a methodical approach to selecting the optimal portfolio of projects for the development of IC based on the stepwise optimization of such a portfolio while taking into account the conditions of their implementation, resource constraints and the impact on the indicator of competitiveness. This approach allows the IC to prioritize the implementation of the development projects and maximize its competitiveness in the context of available resources.

scholarly journals Management of port industrial complex development: environmental and project dimensions

2018 ◽  
Vol 193 ◽  
pp. 05055 ◽  
Author(s):  
Vlada Orlova ◽  
Igor Ilin ◽  
Svetlana Shirokova
Keyword(s):  
Performance Indicators ◽  
Research Process ◽  
Industrial Complex ◽  
Industrial Complexes ◽  
Complex Development ◽  
Process Methodology ◽  
Environmental Process ◽  
Institutional Aspects ◽  
Definition Of ◽  
Managerial Experience

Experience of the leading port industrial complexes indicated high socio-economic performance indicators. However, not every port becomes a basis for formation of a port industrial complex. In different countries, formation happens differently. According to the functional problems, Russian port industrial territories have a lack of development of managerial approaches to its formation and development. Overview of the development of Russian port industrial complexes shows that shortage of research on strategical management, including investment and institutional aspects, leads to an absence of methodological basis for engineering industrial port zones, as well as its strategical development. This requires detection of typical problems of the development of Russian and foreign port industrial complexes, definition of influencing factors, and systematization of managerial experience. During research process, methodology for system economic theory, which is best suited for a complicated territorial facility, was used. Such methodology considers interrelations among environmental, process, project, and object aspects. Namely, the problems of formation and development of port industrial complexes, as well as factors contributing to its growing potential, were identified and systematized in comparative order.

The rivalry of the United States and France in the arms market in the Arab countries of the Middle East in the 1970s

2019 ◽  
pp. 198-204
Author(s):  
Ilia Lakstygal
Keyword(s):  
United States ◽  
Middle East ◽  
The United States ◽  
Arab Countries ◽  
Industrial Complex ◽  
The Us ◽  
Industrial Complexes ◽  
Close Cooperation ◽  
Strong Position ◽  
Fierce Competition

We consider the US-French interaction in the arms markets of the Arab countries of the Middle East during the period of the Arab-Israeli war of the Doomsday (1973) on the Camp David agreements between Egypt and Israel (1978) and the beginning of the Iran-Iraq war (1980). The relevance of the work lies in the fact that the region since the rise in oil prices from the late 1960s to present day remains a key competition place for the largest military-industrial complexes of Western countries, which primarily include the US and French. It is at this time lays the founda-tions of their competition. The purpose of the study is to explore the extent to which the activity of Paris, which, as an ally of Washington in NATO, openly collaborated in the supply of weapons systems with Soviet partners in the region, was willingly or unwillingly subordinated to actions or signals from the United States. We came to the conclusion that the lack of fierce competition, as well as countering the close cooperation of France with Libya, Iraq and Egypt, where the French managed to take a strong position compared to the Americans, is due to the fact that Washington tried to tear off the consumers of the Soviet military industrial complex from the USSR or even would weaken their dependence on Moscow in arms procurement.

scholarly journals Development of the methods of calculation of the electrical installations working operation in case of quality supply disturbance

2020 ◽  
Vol 7 (3) ◽  
pp. 140-155
Author(s):  
Ismael Saeed ◽  
◽  
Azad Mohammed
Keyword(s):  
Electrical Equipment ◽  
Equation System ◽  
Fault Current ◽  
Modes Of Operation ◽  
Operating Modes ◽  
Longitudinal Asymmetry ◽  
Methods Of Calculation ◽  
Short Circuits ◽  
The Mathematical Model ◽  
The Given

This paper proposes a method of calculating of asymmetrical modes of operation of electrical installations where simple and adequate loads equivalent circuits are available with working electrical equipment. So the mathematical model of equation system is derived as universal way for calculating the systems operating modes when it is subjected to a disturbance due to asymmetry. With the help of the obtained model we can calculate different cases of symmetry disturbances, all types of short circuits, between phase short circuits, any type of longitudinal asymmetry, open circuits when there is a resistance for the fault current at the place of damage In the given method, specific types of asymmetry are considered as particular cases and easily calculated from the generalized formula, which is essentially reduces the calculation and allows us to consider cases of asymmetry of any complexity. Therefore this method is offered as a basic for calculation of asymmetry when the system is subjected to a disturbance.

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