Transactions of Kremenchuk Mykhailo Ostrohradskyi National University最新文献

{"title":"FORMATION OF MOTIVATIVE COMPONENT OF VALUE-SEMANTIC COMPETENCIES OF FUTURE LAWYERS","authors":"Anfisa Shmelova","doi":"10.30929/1995-0519.2021.6.11-16","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.11-16","url":null,"abstract":"Purpose. It is shown that the second (master’s) level of training deserves special attention during the training of future lawyers. The main components of value-semantic competence of a lawyer are considered and the motivational component is investigated, which involves students’ awareness of reasons, occasions, motivation to learn, acquisition of new skills, competences, self-knowledge, self-development, self-improvement. It is determined the main components of the motivational component of the value-semantic competence of the future lawyer depending on the peculiarities of the attitude of each student to their activities, work, study. Methodology. A survey of students in a higher education institution was conducted and on its basis the motivational component of education at the Kremenchuk Mykhailo Ostrohradskyi National University was determined. Results. It is shown that the acquisition of relevant competencies, including innovation and research, during the master’s training, significantly increase the level of motivational component of the desire to learn and develop, emphasis in teaching during the master's training on student personality development, building its value system , the formation of personal high moral qualities and value-semantic orientations contribute to the awareness of the need to achieve legal and social justice in society. Originality. Particular attention is paid to the analysis of the answers to obtaining exactly legal higher education. Practical value. The research revealed weaknesses in the motivational component of value-semantic competence of future lawyers, both for bachelors and masters and can be used in the educational process in the form of developing and concluding workshops, exercises, situational tasks to promote student motivation.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"609 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123043813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASSESSMENT OF THE QUALITATIVE AND QUANTITATIVE CHARACTERISTICS OF GREENERY ON THE TERRITORY OF THE CHILDREN'S PLAYGROUNDS IN KHARKIV","authors":"V. Stadnik","doi":"10.30929/1995-0519.2021.6.48-53","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.48-53","url":null,"abstract":"Purpose. To analyze the condition of green spaces on playgrounds in urbanized areas, with the example of Kharkiv, to predict the effectiveness of their dust, noise and gas absorption functions, as greenery is the most accessible and versatile way of protection in urban environments. Methodology. We conducted research on 540 playgrounds with 6627 trees and shrubs, representing 59 species, of which 37 are major. Qualitative analysis was carried out by dividing into groups according to height, age, resistance to high and low temperatures, and we also assessed the sanitary condition of tree and shrub vegetation. We divided the weakened greenery into groups according to the type of damage. Results. The data obtained indicate that most plants are resistant to both low and high temperatures. Only half of the studied objects can be classified as healthy plants, respectively, only this part of the plants is able to effectively perform the protective function. About 46,9% of the surveyed greenery is exposed to mechanical damage, fungal damage, some plants are affected by insects or diseases. Mechanical damage is one of the main causes of weakening of plants in the urban environment, which is associated with the work of municipal services, building works. In addition, children deliberately break and damage the branches of trees and shrubs on playgrounds. The greatest degree of damage by caterpillars and leafminer is characteristic of Fraxinus excelsior L., Morus nigra L.. Leaf spotting was quite common in Betula pendula Roth., Salix acutifolia Willd., Salix babylonica L., Tilia cordata Mill. and others. Powdery mildew was found on young shoots and leaves of Betula, Acer, Ulmus, Fraxinus, and Salix. Necroses and stem rot were not often observed. We have developed a list of recommendations to improve the condition of green areas in playgrounds. Originality. For the first time, we analysed the condition of green areas at children's playgrounds and proposed recommendations for improving their condition. Practical value. The findings can be used in evaluating the effectiveness of the protective functions of green spaces in large cities. References 17, tables 7, figures 2.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128755604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALYSIS OF VOLTAMPEROGRAMS OF OXIDATION-REDUCTION PROCESSES WITH LABVIEW MEANS","authors":"V. Mospan, A. Yurko, D. Kukharenko, V. Gladkyi, S. Sankov","doi":"10.30929/1995-0519.2021.6.122-127","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.122-127","url":null,"abstract":"Purpose. In the analysis of voltammetograms of redox processes for cells with electrodes there is a need to determine the potential of the half-wave E1/2. Finding the half-wave potential is the basis of qualitative analysis of polarographic and voltammetric analyzes. The middle of the area of the abrupt change of current between the two linearly increasing areas of saturation and is the point of the half-wave on the voltammetry. Sometimes it is not possible to reach the possible value of the diffusion current Id and then determining the wave height as the interval from the beginning of the bend of the abrupt section to the last (maximum) point of the characteristic can give an error. Methodology. Since the point of the half-wave E1/2 is the point of bending curve, then on the derivative plot, the potential of the half-wave will correspond to the maximum function. Thus, this feature can be proposed to find the value of E1/2 with voltammetograms. From the proposed algorithm has developed a virtual device based on smoothing and differentiation of data. As a result, the potentials of the half-wave were determined. For the obtained potential value, the corresponding diffusion currents I1/2 were determined. The obtained values of diffusion current depending on the concentration are approximated by an exponential equation in which it is necessary to determine the unknown coefficients: constant multiplier and power factor. By logarithmizing the data, the dependency gets a linear look, which allows you to perform a linear approximation of the data set using the built-in virtual device Linear Fit. As a result, a curve for calibration was plotted according to the approximation equation. The sequence of actions for data linearization, linear approximation, calculation of equation coefficients for calibration and graphical constructions is implemented in the form of a virtual device. Findings. In this work, the algorithm for analyzing the voltammogram is improved: it is proposed to find the value of the half-wave potential E1/2 from the maximum of the graph obtained by graphically differentiating the section of the voltammogram corresponding to the wave. This will allow avoiding errors in determining E1/2 in the absence of the maximum value of the diffusion current Id on the voltammogram. Originality. It is proposed to carry out preliminary data smoothing before graphical differentiation of voltammograms. This makes it possible to avoid ambiguity in determining the inflection point of the characteristic, since the irregularities of the experimental voltammogram will be perceived as the extrema of the function. The best result in this case is obtained by using a low-pass window filter with a window width of three elements. Practical value. A virtual device has been created in the Labview program, which implements the proposed algorithm for determining the potential of the half-wave E1/2 by smoothing and graphical differentiation of the voltammogram. Сonclusion","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134576811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SOFTWARE AND HARDWARE AUTOMATED CONTROL COMPLEX FOR THE FORMATION OF A CRACKED LAYER ON SEMICONDUCTOR PLATES","authors":"S. Pritchin, A. Bobryshev, Aleksandr Sorokun, Tymur Zhumatii","doi":"10.30929/1995-0519.2021.6.128-132","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.128-132","url":null,"abstract":"Purpose. Porous silicon is widely used in devices such as light emitters, sensors, and medical devices. The quality of operation of these devices depends on the diameter of the pore, the uniformity of its surface, and the thickness of the layer. To control the characteristics of the porous layer, the current density, etching time, and current shape are changed. As a rule, the growth is carried out using a constant current density. In this case, hydrogen bubbles are formed in the pores with a simultaneous decrease in the etching rate, which leads to the formation of small pores. This limits the pos-sibility of obtaining porous silicon with a high degree of reproducibility. Methodology The research was carried out on a semiconductor wafer. After cleaning, the silicon wafers were etched in an electrochemical cell at room temperature. For the study, two types of etching current were used: current in the form of rectangular pulses with a variable duty cycle and direct current. For the pulsed current, the density was 20 mA/cm2, the duty cycle of the pulses varied from 40 to 80% at a frequency of 7 Hz. For direct current, the etching current density was 20 mA/cm2. The etching time in both experiments was 30 minutes. Findings. The paper shows the influence of the shape of the silicon etching current on the formation of a porous layer. To control the etching process, a hardware-software automated complex for controlling the formation of a porous layer on semiconductor wafers was developed. Originality. When using a pulsed current, the structure of the porous layer becomes more uniform, as evidenced by an increase in the intensity of the photolumines-cence spectrum at a wavelength of 650 nm. Practical value. The results of the work can be used in the development of such devices as light emitters, sensors and medical devices. Сonclusions The method of etching single-crystal silicon has been improved in order to obtain a porous layer having a uniform structure by using the etching current in the form of pulses with a duty cycle of 80% and a frequency of 7 Hz.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115888328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FEATURES OF OPERATION AND EFFICIENCY OF ARMORED VEHICLES","authors":"V. Yelistratov","doi":"10.30929/1995-0519.2021.6.104-109","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.104-109","url":null,"abstract":"Purpose. The large number of armored vehicles offered in Ukraine significantly complicates the choice of such equipment for equipping the Armed Forces of Ukraine. These cars are designed and manufactured on a variety of ag-gregate bases, often owned by manufacturers in other countries, which is not always acceptable to the military. In addi-tion, the variety of designs leads to deterioration of unification and interchangeability of motor vehicles, which can lead to significant obstacles to quality and timely maintenance of military armored vehicles, their repair and modernization in real operation in the Armed Forces of Ukraine. Methodology. To solve the problem, an analysis of the features and evaluation of the effectiveness of the operation of armored vehicles, which are manufactured by factories of different countries for armed military units. Mathematical modeling methods were used to assess the efficiency of armored vehi-cles, including the specific fuel consumption per person transported and the ton of cargo transported, as well as speed criteria allows consumers of armored vehicles, which are the Armed Forces of Ukraine, to make an informed choice in favor of purchase another car with a large number of them, offered by numerous manufacturers of such products. Re-sults. It is established that Kremenchug Automobile Plant is the only car manufacturer in Ukraine that provides the full life cycle of cars from their development and manufacture to warranty and service support during operation. In addition, Kremenchug Automobile Plant has its own service and maintenance service, which reduces downtime of equipment manufactured by the plant, when performing repair or maintenance of cars in the units under the conditions of their op-eration. Operation of cars of the Kremenchug Automobile Plant, especially KrAZ «Hulk», taking into account their greater load and the number of personnel of military units that can be transported, according to specific indicators per person transported or ton of transported cargo, which is what the end user needs, it turns out more profitable from an economic point of view. Originality. For the first time, a comparative analysis of the specific fuel consumption of ar-mored vehicles manufactured by factories of different countries for armed military units, in their practical use and cal-culated the efficiency of their operation according to speed criteria. Practical value. Based on the comparative analysis of specific fuel consumption of armored vehicles manufactured by factories of different countries for armed military units, in their practical use and performed calculation of their efficiency according to speed criteria, the consumer of armored vehicles, which is the Armed Forces of Ukraine, can make an informed choice. in favor of buying a car from their large number, which is offered by many manufacturers of such products. References 17, tables 2, figures 5.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128574503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ELECTROCHEMICAL HYDROGENIZATION OF THE FRONTAL SURFACE OF SOLAR CELLS AND THEIR RESEARCH BY MASS SPECTROSCOPY","authors":"V. Yerokhov, A. Druzhinin, I. Skrypnyk","doi":"10.30929/1995-0519.2021.6.98-103","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.98-103","url":null,"abstract":"Purpose. Texturing of the silicon surface, both by chemical and electrochemical etching, is an integral part of the technology of modern high-performance silicon solar cells. The texture on the front surface of the solar cells not only reduces reflection losses, but also helps to capture long-wave light in the SC structure, thereby expanding its operating spectral range and increasing the short-circuit current. In this regard, the study of the PSi layer in a nanotexture by mass-spectroscopy on the functional properties of the frontal silicon surface, which was pre-textured, is of particular interest. Methodology. The study of all stages of formation of hydrogenated porous structure and identification of technological patterns that affect the characteristics of the obtained nano-, meso-, macropores are very important, because most of the porous parameters are laid at the stage of formation of nucleation (seed) centers. In order to improve the passivating properties of PSi layers used in solar cells, the process of electrochemical hydrogenation of PSi as on p - type silicon substrates with a resistivity of 0.1 ÷ 10 Ohmsm also on substrates with a formed emitter junction n+- p of conductivity was studied. Various solutions were used as the electrolyte, such as (HF: C2H5OH=1: 1), (HF: C2H5OH=1:2) and so on. The current density and anodizing time varied over a wide range of values, which allowed the formation of PSi layers with different porosity and thickness. A solution of HF: C2H5OH = 1: 1 was used as the electrolyte. The anodizing current and time varied over a wide range of values to obtain PSi layers with different porosity and thickness. To determine the conditions of the process of electrochemical hydrogenation of PSi during its cathodic polarization, potentiostatic current-voltage curves of the system Pt (anode)-electrolyte-porous silicon/ silicon (cathode) for electrolytes with different chemical composition were taken. Finding. Comparison of the surface appearance of Baysix type multicrystalline silicon samples before and after hydrogen hydrogenation in an electrolyte based on hydrofluoric acid ((HF: C2H5OH=10:1), (HF:C2H5OH=10:2) and so on), both in the secondary ion Spectra and in the image of the distribution of elements over the surface (mass spectral ion microscope and Ion microzond mode). Originality. We get a 2D image (size 200x200 microns) of the surface of the current of secondary ions H+ hydrogen and 2D image of the secondary ion current of molecular SiH2+ the surface of a Baysix type multicrystalline substrate passivated with hydrogen by hydrogenation, which is comparable to the optical image of a pure silicon surface that has been hydrogenated. From the form of 2D-ion images, as well as their individual parts, it can be seen that all the difference in the current intensity of the secondary ions is due to the topography of the surface of the samples. Practical value. The prospects of creating efficient solar cells using multifun","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121431641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INVESTIGATION OF DIFFERENT DEFORMATION SCHEMES FOR OBTAINING FINE-GRAIN STRUCTURE OF CAST ALUMINUM ALLOY AK 7","authors":"Nataliia Zlochevska, Anton Lavrynenkov, V. Pasichnyk","doi":"10.30929/1995-0519.2021.6.79-84","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.79-84","url":null,"abstract":"Abstract. The article investigated various schemes of deformation of the workpiece to improve the mechanical properties of the cast aluminum alloy AK 7. The most effective deformation schemes are spiral widening extrusion (SWE) and multi-angle pressing (MAP). Filling of a matrix most completely occurs at the SWE scheme, the degree of filling makes 90–95%. The depth of propagation of plastic deformation in the scheme of SWE is 6–9 mm. The results of numerical simulations correlate with the results obtained experimentally for the SWE matrix. It was experimentally determined that the increase in the accumulated shear deformation causes an increase in the values of microhardness. The magnitude of the accumulated deformation increases along the radial coordinate from the center to the edge of the workpiece. It was found that after the third transition in the central zone, the amount of accumulated deformation is approximately equal to the amount of deformation after the first pass in the edge zone. Mechanical properties, namely strength characteristics are increased. So after the first pass their values increase in relation to the source metal by 15%, after the second treatment by 20%, after the third by 25%.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127706499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MODELS OF A HIERARCHICAL MULTI-AGENT SYSTEM FOR PERFORMING BUSINESS PROCESSES","authors":"I. Oksanych, I. Shevchenko","doi":"10.30929/1995-0519.2021.6.73-78","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.73-78","url":null,"abstract":"Purpose. Developing a set of models which formally describe the operation environment of the organizational and technical system and the interaction of software agents of different roles in performing business operations. The pres-ence of such a set of models allows you to create information technology for monitoring and routing business processes and reduce costs for business operations. Methodology. The research methods are based on systems analysis methods. Findings. A set of models of hierarchical multi-agent system for business processes has been developed. The complex comprises a static description of the operation environment of the organizational and technical system, where there are models of business process, business operation and its components. Originality. Organization of total monitoring of the operation environment of the organizational and technical system, i.e. the current state of the processes of processing applications, queues and workstations requires the development of static and dynamic business process models. Based on the static description, a model of the dynamics of business processes promoting throughout many workstations has been developed. This makes possible to monitor the status of workstations, queues and applications for business opera-tions. In particular, a formal description of the software agent, its competencies and a model of interaction of three-level agents which perform the functions of business operation executors, monitors and dispatchers has been developed. Having such tools, the second important aspect is the development of a universal hierarchical structure of the multi-agent system, in which different agents perform the roles of performers, monitors and dispatchers. Such a structure should include the regulation of the agent functions, models of agents interaction at all three levels, ways of agents-people communication. Practical value. Tests of the monitoring and scheduling system in different conditions (electronic document management, manufacturing company, human resources management department) showed a decrease in time of business operations, losses on waiting and increase in rhythm of business processes. The results of the work has enabled the development of a queue management strategy, which has showed a reduction in time of operations and a more balanced workload.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"322 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114738778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TECHNOLOGIES AND EQUIPMENT DEVELOPMENT PROSPECTS FOR SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS (SHS)","authors":"Y. Belokon’, V. Kulynych, Volodymyr Drahobetskyi, D. Sereda","doi":"10.30929/1995-0519.2021.6.110-115","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.110-115","url":null,"abstract":"Purpose. The work is aimed at building an algorithm and coating processing on structural steel, its detailed control at each stage and analysis in obtained material physical and technical characteristics. Methodology. The research of the mechanism of obtaining coatings, as well as operational tests of the obtained samples, computer simulation and spectral analysis are offered. Findings. The kinetics of protective coatings formation on steel 50 has been studied. Вased on the obtained data, the conditions for obtaining the greatest coating thickness are predicted. The rational technology of obtaining alloyed chromium-alloy protective coatings on structural materials has been developed, which allows to use the spent charge as: ballast filler for SHS-charges, abrasive material for grinding, powder material for spraying. The study of the microstructure, phase composition of alloyed chromium-alloy protective coatings, their performance characteristics was carried out on the basis of the obtained material. The analysis of surfactant solutions (surfactants) use efficiency as lubricants in the course of SHS processes and development the forecast estimations system for efficiency use the surfactant solutions as lubricants in the course of SHS processes is carried out. Originality. On the basis of the conducted researches and the received results new alloyed chromium-alloyed protective coatings and compositions of powder charges for self-propagating high-temperature synthesis are developed. Practical value. The implementation of the developed recommendations will increase the service life by 2,7–3,2 times by increasing the wear resistance by 1,9–2,1 times. Сonclusions. Boron and titanium alloy chromium-analytical protective coating is obtained on the parts in order to increase their wear resistance. Low cost of a covering in comparison with known methods of reception of coverings in isothermal conditions is provided by insignificant prime cost of components of SHS-charge, and also increase in service life of technological equipment.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"75 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120884486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALYSIS OF APPROACHES FOR ESTIMATING THE LIGHTNING PERFORMANCE OF OVERHEAD TRANSMISSION LINES","authors":"Y. Trotsenko, Artem Nesterko, M. Dixit","doi":"10.30929/1995-0519.2021.6.116-121","DOIUrl":"https://doi.org/10.30929/1995-0519.2021.6.116-121","url":null,"abstract":"Purpose. A review of the current literature, regarding the existing approaches used to estimate the lightning perfor-mance of overhead power lines, was performed. A review of available lightning activity data over India was also per-formed. Methodology. The electro-geometrical model was chosen to analyze the lightning performance of overhead power lines. International normative documents and national standard were used to highlight the main parameters that should to be paid main attention to when estimating lightning performance of overhead power lines. Results. Presently, approaches from IEEE and CIGRE guides can be used for analysis of statistical distributions of lightning current pa-rameters. Further studies are required on thunderstorm days, ground flash density and current parameters statistical dis-tributions for different locations, which will be supportive in performing analysis for Indian power lines. Originality. To graphically analyze the shielding failure mechanism with a help of electro-geometric model, the sketch of real 220 kV double-circuit transmission line tower was used. Using electro-geometric model it was graphically shown how downward lightning leader that propagate from thunderstorm cloud toward ground can finish its path on the overhead shield wire, phase conductor or ground plane. Practical value. Available data on lightning activity over different parts of India are still not enough complete. It is of great importance to obtain reliable statistical data on thunderstorm characteristics in the area of the studied power line route. Measurement techniques based on satellites have limitations in obtaining ground flash density values. Thus, for India there is a need in development of modern lightning detection networks and related studies on lightning characteristics. Conclusions. Future efforts should be focused on obtaining not only the positions and number of lightning strikes to the overhead power line, and calculation of lightning flashover rate parameters, but also the statistical distributions of lightning current values and related overvoltage parameters at the overhead wires and different phase conductors. References 21, figures 4.","PeriodicalId":405654,"journal":{"name":"Transactions of Kremenchuk Mykhailo Ostrohradskyi National University","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115442146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}