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Статті в журналах з теми "Електротехнічний комплекс"
СУПРУН, О. Д., О. І. СЕМЕНЕНКО, Ю. А. СЕМЕНЕНКО та М. Б. РУДНИК. "Електротехнічний комплекс з вітродизельною установкою гарантованого живлення для тягових підстанцій залізниць". Інформаційно-керуючі системи на залізничному транспорті, № 2 (23 квітня 2019): 7–17. http://dx.doi.org/10.18664/ikszt.v0i2.164779.
Повний текст джерелаLobanov, L. M., I. P. Kondratenko, V. M. Mikhalskyi, M. O. Pashchin, O. M. Karlov, V. V. Chopyk, and O. L. Mykhodui. "ELECTROTECHNICAL COMPLEX FOR ELECTRODYNAMIC PROCESSING OF WELDED JOINTS." Tekhnichna Elektrodynamika 2020, no. 6 (October 21, 2020): 61–68. http://dx.doi.org/10.15407/techned2020.06.061.
Повний текст джерелаKASHKAROV, А. "Electrical measuring complex for the frame greenhouse microclimate parameter monitoring." Energy and automation 2018, no. 2 (July 3, 2018): 109–20. http://dx.doi.org/10.31548/energiya2018.02.109.
Повний текст джерелаТверитникова, О. Є. "Методологічні підходи в дослідженнях з історії електротехніки". Studies in history and philosophy of science and technology 28, № 2 (28 листопада 2019): 57–63. http://dx.doi.org/10.15421/271915.
Повний текст джерелаЛавріненко, Ольга. "ІСТОРІОГРАФІЯ СТАНОВЛЕННЯ ТА РОЗВИТКУ ТЕОРЕТИЧНОЇ ЕЛЕКТРОТЕХНІКИ В УКРАЇНІ (ХХ СТ. – ПОЧАТОК ХХІ СТ.)". KELM (Knowledge, Education, Law, Management) 1, № 8 (13 липня 2021): 89–96. http://dx.doi.org/10.51647/kelm.2020.8.1.13.
Повний текст джерелаБабміндра, Д. І., І. М. Слободяник, Д. А. Ільченко та Н. І. Гриневич. "ЗОВНІШНЯ ТОРГІВЛЯ ЯК СТРАТЕГІЯ РОЗВИТКУ БЮДЖЕТОУТВОРЮЮЧИХ ГАЛУЗЕЙ ЕКОНОМІКИ УКРАЇНИ". Visnik Zaporiz'kogo nacional'nogo universitetu. Ekonomicni nauki, № 2 (50) (12 серпня 2021): 61–65. http://dx.doi.org/10.26661/2414-0287-2021-2-50-11.
Повний текст джерелаRosen, V., L. Davydenko, V. Volynets, V. Davydenko, and N. Davydenko. "ENERGY EFFICIENCY BENCHMARKING OF COAL MINES ELECTROTECHNICAL COMPLEXES." Transactions of Kremenchuk Mykhailo Ostrohradskyi National University 4 (July 8, 2019): 134–40. http://dx.doi.org/10.30929/1995-0519.2019.4.134-140.
Повний текст джерелаLYSENKO, V., and I. CHERNOVA. "Electrotechnical complex control system for the production of entomophages." Energy and automation 2018, no. 2 (July 3, 2018): 45–57. http://dx.doi.org/10.31548/energiya2018.02.045.
Повний текст джерелаZaiets, N., V. Shtepa, O. Savchuk, and A. Rogovik. "Development of a comprehensive maintenance program electrotechnical complexes of food production." Energy and automation, no. 4 (October 23, 2019): 14–24. http://dx.doi.org/10.31548/energiya2019.04.014.
Повний текст джерелаЛисенко, В. П., та І. С. Чернова. "ІНТЕЛЕКТУАЛЬНИЙ АЛГОРИТМ КЕРУВАННЯ ДЛЯ ЕНЕРГОЕФЕКТИВНОГО ВИРОЩУВАННЯ ЕНТОМОФАГІВ". Automation of technological and business processes 10, № 3 (13 листопада 2018): 50–58. http://dx.doi.org/10.15673/atbp.v10i3.1088.
Повний текст джерелаДисертації з теми "Електротехнічний комплекс"
Тверитникова, Олена Євгенівна. "Система вищої електротехнічної освіти України впродовж 1970–1980-х рр". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38783.
Повний текст джерелаГапон, Дмитро Анатолійович. "Методи та засоби аналізу якості електропостачання та електромагнітної сумісності електротехнічних комплексів та систем". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48409.
Повний текст джерелаThe dissertation on achieving the scientific degree Doctor of Technical Sciences by specialty 05.09.03 – "Electrotechnical complexes and systems" - National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2020. The paper contains the solution of the actual scientific problem of the analysis of quality of power supply and electromagnetic compatibility of electrotechnical complexes and systems. This problem is the lack of a mathematical basis and, accordingly, a regulatory framework for assessing the impact of a particular electrical complex or consumer system on the quality of electricity. The current regulations place all responsibility for the low quality of electricity supply directly on the supply organization in the form of fines, which, as experience shows, does not contribute to the construction of optimal power supply systems. The paper analyzes the compatibility of the existing regulatory framework (including IEEE519, EN50160) and evaluates the effectiveness of the proposed methods of determining responsibility using computer simulations. The analysis showed that the existing methods have significant limitations, as a result of which they are not suitable for practical application. The paper proposes an assessment of the quality of power supply by comparing the mode of power consumption of the existing electrical complex with the reference consumer in the form of numerical coefficients of power and losses. Calculation formulas for single-phase, three-phase three-wire and four-wire power supply systems are obtained. Three-phase three-wire system the reference consumer, regardless of the voltage parameters, is a symmetrical triangle of constant active resistance is shown. Three-phase four-wire system the reference consumer, regardless of voltage parameters, is a combination of a symmetric triangle of constant active resistances and a symmetrical star, the resistance in the branches of which is as many times more than the resistance of the triangle is shown. It is noted that the general assessment of the loss ratio is not informative enough about the reasons for the deterioration of electricity quality. To solve this problem, the division of total losses into losses from asymmetry, nonlinearity, reactivity and nonstationarity is proposed. The concept of the reference reactive consumer is offered, and conclusions concerning possibility and expediency of its use are made. A method for determining the reactivity coefficient by volumes of energy flowing in the forward and reverse directions is proposed. The concept of the average reactive consumer is offered. The paper proposes to build an assessment of the contribution of a separate electrical complex or consumer system in the deterioration of power supply on the basis of power values specified in the contract and the establishment of normalized resistance of the power supply system. Based on these values, a mathematical apparatus is proposed, which allows not only to determine the fact of violation of the limits of electromagnetic compatibility but also to quantify the amount of electricity that has been damaged. It is proposed to determine the coefficient of losses from asymmetry using a reference consumer. This coefficient is calculated as the ratio between the power loss of three independent single-phase reference consumers to the losses of the reference three-phase consumer. This solution avoids the influence of such factors as nonlinearity and reactivity. In addition, the device of symmetrical components is not used, which is inconvenient in the case of non-sinusoidal voltages and currents. It is proposed to select individual coefficients of losses from reactivity and nonlinearity, which are calculated by dividing the harmonic components of the distortion current by the power direction. The method of calculation of losses from nonstationarity is calculated, which is calculated as the ratio of total losses of reference consumers on several "short" intervals, and losses of the reference consumer on a long interval that includes all "short". The analysis of character of complex resistance of an electric network depending on parameters of its elements for typical cases of connection of consumers of various character on voltage of 10 KV is carried out. The obtained dependence allows us to talk about the possible use of normalized values to estimate network bandwidth. An empirical method for calculating the normalized resistance is proposed. A method for measuring the parameters of the electrical network mode is proposed, which allows to implement algorithms for assessing the quality of power consumption, the advantages of which are self-synchronization, calculation of values strictly for one period of the main voltage harmonic, absence of gaps and overlays of observation intervals. A method for measuring the current values of currents and voltages on their discrete images is proposed, taking into account the discrepancy between the moments of the initial and final readings of the digital image of the signal with the moments of the beginning and end of the measurement period. A method of taking into account the quality of electricity consumption in the calculations for the consumed electricity is proposed, which creates an economic incentive to increase the efficiency of energy regimes of the consumer. The method of estimation of infringement by the consumer of norms of consumption on size of power and harmonic components which are potentially capable to cause an exit of indicators of quality of electric energy beyond admissible limits is offered. The basics of the method of construction of penalties against the consumer in case of exceeding the allowable parameters of electricity consumption, as well as penalties against the supplier of electricity in case of low quality of electricity and the absence of violations by the consumer. In the experimental part of the work the application of the offered mathematical devices on the examples of test mathematical models and oscillograms obtained on real objects is tested. The experiment allowed to confirm the effectiveness of the proposed methods, in addition to the method of comparison with the reference medium-reactive consumer, which has not proved to be an effective tool for analysis and does not seem promising. Also in the work the hardware realization in the form of the electric energy meter taking into account its quality is offered.
Гапон, Дмитро Анатолійович. "Методи та засоби аналізу якості електропостачання та електромагнітної сумісності електротехнічних комплексів та систем". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/48421.
Повний текст джерелаThe dissertation on competition of a scientific degree of the doctor of technical sciences on a specialty 05.09.03 - "Electrotechnical complexes and systems". - National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2019. In the dissertation the important scientific and technical problem of increase of quality of power supply of electrotechnical objects, complexes and systems and maintenance of their electromagnetic compatibility by development of mathematical and hardware of systems of the account of the electric power taking into account energy efficiency of modes of power consumption and the revealed infringements of electromagnetic compatibility energy or its consumer. In the introduction the existing problem is defined and the urgency of the dissertation topic is substantiated, the connection of work with scientific programs, plans, themes is given, the purpose and tasks of scientific research are formulated, the object and subject of researches are considered, the list of research methods applied for achievement of the set purpose is given work. The scientific no velty and practical significance of the obtained results are stated, the data on publications and approbation of the results of the work are given, the personal contribution of the applicant is characterized, the information on the implementation of the results of the work is given. In the first section, based on the study and systematization of the results of analysis of materials from open sources, the main shortcomings of existing methods of assessing the quality of electricity supply and regulatory framework, which does not fully resolve conflict situations in violation of electromagnetic compatibility in terms of electricity supplier - consumer. Methods for determining the responsibility for the deterioration of electricity quality and its individual indicators are also considered. The second section analyzes the typical power supply scheme, which allowed to draw conclusions and obtain the main numerical characteristics of the power supply system of a three-phase electrical facility with a supply voltage of 10 kV. The computer model shows the mutual influence of several consumers on the quality indicators of the voltage at the point of connection and analyzes the influence of the parameters of the power supply system, these indicators. It is shown that the definition of the source of higher harmonics in the direction of the component power of the higher harmonic does not guarantee to allocate a consumer with a nonlinear load if the number of such consumers is greater than one. The compatibility of EN 50160 and IEEE 519 standards in terms of the norm of levels of harmonic components in the composition of current and voltage is also analyzed. The obtained results allow to speak about the presence of certain moments in which the higher harmonic components of the current generated by the consumer without violating the IEEE 519 standard can cause the presence of voltage harmonics exceeding the norms set by EN 50160. It is also concluded that the generation of higher harmonic components system resistance values. The third section proposes further development of the mathematical apparatus for determining power and loss coefficients as indicators of power consumption quality, in particular, the determination of integrated loss coefficients for three-phase three-wire and four-wire networks is substantiated. The theory of the "reference" consumer was further developed. It is shown that in a three-phase three-wire network the reference consumer, regardless of the voltage parameters, is a symmetrical triangle of constant active resistances. It is shown that in a three-phase four-wire system the reference consumer, regardless of voltage parameters, is a combination of a symmetric triangle of constant active resistances and a symmetric star, the resistance in the branches of which is as many times the resistance of the triangle as the active resistance of the neutral conductor. For the first time, a mathematical apparatus for selecting individual components from the total power and loss coefficients for such types of distortions as asymmetry, nonlinearity, reactivity and nonstationarity has been proposed. The concept of the reference reactive consumer from the conditions of maximum power or minimum losses at equality of ratios of power flows from and to the consumer is offered, that allows to realize calculation of coefficient of reactivity and power at any form of voltage in single-phase and three-phase networks. It is shown that in such a statement the reference reactive consumer tends to generate higher harmonics and does not have a convenient analytical or numerical solution for comparison with the current consumer. The concept of the average reactive consumer is proposed, in which all harmonics have an equal ratio of power flows to and from the consumer, which allows to compare the current consumption mode of the current consumer with such an average reactive one. A method for estimating the coefficients of loss and power from asymmetry for a three-phase consumer at arbitrary voltage is proposed. A method for estimating the ratio of the coefficients of losses from reactivity and nonlinearity of the consumer by dividing the corresponding harmonics of the Frieze current in the direction of the active component is proposed. A method for estimating the coefficients of losses and power from non-stationary consumption is proposed. In the fourth section the analysis of character of complex resistance of an electric network depending on parameters of its elements for typical cases of connection of consumers on voltage of 10 KV is carried out. The obtained dependence allows us to talk about the possible use of normalized values to estimate network bandwidth. The method of measuring the electrical parameters of a three-phase network based on the approximation of the input signal by the sum of harmonic components has been further developed. Features of the method are automatic adjustment of the frequency and duration of the observation interval in a given range, the use of a complete set of phase voltages (or linear) in determining the frequency taking into account their weight values, which reduces measurement errors in difficult conditions - in the presence of asymmetry, higher harmonics, aperiodic component or in the absence of voltage in a separate phase. In addition, the measurement method uses a constant quantization frequency of the input digital data, which simplifies the hardware of the device. A method of calculating the current values with a precise reference to the voltage period obtained by the previous method is proposed, which eliminates the frequency error in the measurement regardless of the location of the beginning and end of the observation interval relative to the input digital signal. The system of the account of electric energy with use of indicators of quality of electric energy and efficiency of electric consumption is offered. A feature of the system is the additional accounting of losses for the transmission of electricity by comparing the characteristics of electricity consumption of the current consumer with those for the reference consumer, ie the use of loss factors or power. This method of accounting allows you to correctly rate all deviations in the modes of load, such as reactivity, nonlinearity and nonstationarity. A system of penalties for deterioration of electricity quality is proposed, based on the calculation of "penalty" energy if the consumer violates the norms of electricity consumption and "non-tariffed" energy, if there are no violations by the consumer, but the quality of electricity does not meet the norms. The basics of billing on the basis of this electricity metering system are proposed. In the fifth section, the data confirming the theoretical provisions of sections 3 and 4 were experimentally obtained. In particular, estimates of the quality of electricity consumption were implemented by comparison with a set of reference consumers. The experiment showed the possibility of successful application of Frieze current generation and its subsequent analysis to assess the quality of electricity consumption. At the same time parallel use of its three-phase and single-phase implementations for an estimation of asymmetry, nonlinearity and reactivity accordingly is possible. The method of comparison with the reference average reactive consumer proposed in section 3 has not proved to be an effective tool of analysis and does not seem promising. At the same time, the separation of the harmonic components of the Frieze current in the direction of their active component allows you to effectively track the source of currents of higher harmonics. The above methods using the model of a fragment of the power system with different types of load confirmed the correctness of the developed methods for assessing the quality of electricity consumption. Tests using oscillograms obtained on real three-phase loads (traction substation) also confirmed the efficiency and effectiveness of the developed assessment methods. In models with exceeding the permissible modes, the use of the mathematical apparatus developed in Section 4 allowed to identify the source of distortion, even if several consumers act as sources of these distortions at the same time.
Тетеря, Юрій Степанович. "Обгрунтування структури побудови автономних електротех¬нічних комплексів на основі гібридної вітроелектричної установки". Thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2014. http://elartu.tntu.edu.ua/handle/123456789/3022.
Повний текст джерелаThe purpose of the work is substantiation of construction structure of autonomous electrical systems based on wind power installations and asynchronized synchronous generator (ASG) and generator control algorithm to achieve this efficient system operation. The object of research is a wind power installation as a system that includes a wind turbine and asynchronized synchronous generator. The subject of research is joint work of wind turbine and ASG in an unstable rotation speed and the necessity to maintain constant frequency generated at maximum aerodynamic coefficient of efficiency of wind turbine. The use of ASG in wind power can increase the efficiency of the wind power installation to the level inaccessible to other types of generating systems thanks to the development of power electronics. Therefore there is the need to improve the methods of wind turbines regulating parameters and ASG and in creation of ASG control algorithms provided a variable speed rotation wind turbine.