ENGINEERING, ENERGY, TRANSPORT AIC最新文献

{"title":"PROSPECTS FOR INCREASING THE LEVEL OF ENERGY AUTONOMY OF PROCESSING ENTERPRISES OF AIC OF UKRAINE WITH THE HELP OF BIOGAS PRODUCTION","authors":"I. Kupchuk, Y. Gontaruk, Y. Prysiazhniuk","doi":"10.37128/2520-6168-2022-3-8","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-3-8","url":null,"abstract":"Domestic processes of production and processing of agricultural products are characterized by a high specific energy capacity, which determines our economy as one of the most energy inefficient, and the resulting products, non-competitive in the agricultural food market of the EU countries, leaving us only the role of an exporter of raw materials for European food industry enterprises.\u0000In addition, almost all processes of the agro-industrial complex of Ukraine are characterized by environmental pollution, which generally contradicts the principles of ecologization and decarbonization of the economy, defined by the European Commission in the framework of the European Green Deal. Considering that the full integration of Ukraine into the EU is defined by the Constitution of Ukraine as the main vector of the foreign policy course, as well as the general global trends towards rising prices for fossil fuels and insufficient provision of the country with its own primary energy resources, research aimed at rationalizing the structure of energy consumption is becoming increasingly important. . fuel in accordance with EU standards and the greening of production, including through the introduction of alternative energy technologies at processing enterprises of the agro-industrial complex of Ukraine.\u0000The article assesses the resource potential of domestic agriculture and presents possible options for agrobiomass available in sufficient quantities suitable for anaerobic digestion followed by methane generation. Based on the systematization and generalization of information obtained from open sources, a potential direction for solving the problems of increasing the level of autonomy of processing enterprises was proposed, based on the creation of a macro-level technological system with four main elements: an agricultural enterprise, a processing enterprise, a territorial community and a biogas complex, and a fundamental structural model of such a territorial cluster.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121100011","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":"RESEARCH OF THE MICROHARDNESS OF THE SURFACE OF A CYLINDRICAL PART DURING DEFORMATION","authors":"N. Veselovska, Yuriy Paladiychuk, Inna Telyatnuk","doi":"10.37128/2520-6168-2022-3-5","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-3-5","url":null,"abstract":"It is known that when processing plastic materials by cutting, chip grinding is a serious problem. The formation of a stable, strong draining chip is a sign of low machinability of the material of the part and requires the use of special means and methods that would ensure the separation of the chip or allowance that is cut.\u0000This issue is especially relevant in the case of cutting drawing as a low-speed process, which is characterized by intensive overgrowth and a high coefficient of chip shrinkage, and therefore the strength of the latter. Today, there are a number of original developments of several scientific schools, which implement the idea of preliminary division of the allowance during drawing by creating a network of technological chip-splitting grooves.\u0000The process of internal drawing, in particular drawing of round deep holes, must necessarily take place under conditions of forced chip separation or allowance. At the same time, the so-called transverse division of the chips, i.e., division along the perimeter of the hole, is usually carried out due to structural elements on the broach teeth and today is not too difficult a problem. However, there are certain reserves in this direction as well, in particular those related to increasing the stability of the tool.\u0000This article considered the technological function of the reliefs, which consists in the forced division of the cut allowance with contour grooves. An analysis of the advantages and disadvantages of the most common processes for obtaining round holes in hollow blanks and parts is carried out. The essence of the group (progressive, variable) stretching scheme is described.\u0000Typical combined extension tools are considered. Given formulas for calculating the dimensions of chip grooves. The first component р of the change in the diameter of the hole and the outer diameter of the workpiece after each of the combined drawing operations is characterized.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130374708","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":"DEVELOPMENT OF A METHOD FOR DETERMINATION OF FATTY-ACID COMPOSITION AND LOWER HEAT OF COMBUSTION OF BIODIESEL FUEL","authors":"Viktor Anisimov, I. Gunko, Vadim Ryaboshapka","doi":"10.37128/2520-6168-2022-4-1","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-4-1","url":null,"abstract":"The situation that has developed on the market of oil products in the conditions of the war with the invaders has led to a shortage of liquid fuels and a constant increase in the price, in particular of diesel fuel, prompting the producers of agricultural products to think about switching to alternative types of fuel. Research related to the production and use of biodiesel fuel is especially relevant in today's conditions. Scientists do not ignore this question, in particular, Vinnytsia National Agrarian University has devoted more than one research topic to the mentioned problem. In more detail, in the mentioned issue, research is being conducted aimed at determining the energy value of the obtained biofuels, namely, the lower calorific value. The purpose of the article is to create a methodology for determining the fatty acid composition of biodiesel fuel and determining its lower heat of combustion, which is necessary for the analysis and evaluation of the energy efficiency of alternative fuels. Research methods are based on D. I. Mendeleev's formula for determining the lower heat of combustion, which is based on data on the percentage content of the elemental composition of the fuel. The calculation of the elemental composition was carried out on the basis of the molecular weight data of the components of biodiesel fuel, which in turn were obtained by chromatographic analysis using a gas-liquid chromatograph. Similar calculations were made in Microsoft Excel spreadsheets. The article publishes the results of research on two samples of biodiesel fuel, made from two types of raw materials - sunflower and rapeseed oil. A method of determining the fatty acid composition of these samples and determining the lower heat of combustion of biodiesel fuel as a whole and its components has been developed. The results given in the tables can be the basis for further conclusions about the energy value of individual components included in the studied fuel.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129917910","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":"DEVELOPMENT OF THE PROCESS OF STAMPING BY ROLLING OF TUBULAR PREPARATIONS USING INDUCTION HEATING","authors":"V. Matviychuk, V. Savkiv, Maksym Bohatiuk","doi":"10.37128/2520-6168-2022-3-9","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-3-9","url":null,"abstract":"Methods of pressure treatment of metals based on the action of technological load in the conditions of a localized plastic cell. The main purpose of such methods is that the change in shape at any time is performed only on a fraction of the volume of the workpiece and when moving the deformation center covers the entire volume. These are well-studied and widely used in the production of free forging, rotary forging, rolling, etc.\u0000A relatively new method of MP - stamping by rolling, is characterized by a number of positive effects:\u0000- reduction of deformation force in comparison with traditional methods in 5-30 times;\u0000- the possibility of processing metal in the cold state with the same technological effort as in hot processing;\u0000- the equipment corresponds to a high level of labor safety;\u0000- reducing the size, weight and cost of equipment;\u0000- the possibility of implementing various technological operations.\u0000Modern mechanical engineering, instrument making and other metalworking industries widely use and manufacture parts with a large ratio of cross-sectional dimensions, the production of which by existing methods of metal forming is either inefficient or impossible.\u0000The most technological are the processes of SHO, in which the workpiece has a tubular or annular shape. Such blanks are well amenable to induction heating, which while providing a high frequency electromagnetic field allows them to be heated quickly and efficiently. This can heat a limited amount of workpiece material. Thus, the use of induction heating in the processes of SHO significantly expands their technological capabilities, which determines the relevance of the chosen topic.\u0000The main advantages of induction heating include: transmission of electrical energy does not require contact devices, is carried out directly into the workpiece, which increases the heating rate; due to the possibility of controlling the frequency of the current, the maximum power is released in the limited thickness of the surface layer of the product, which is especially effective when heating the pipe blanks; induction heating can increase productivity and improve working conditions.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121394021","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":"CLASSIFICATION AND ANALYSIS OF METHODS AND EQUIPMENT FOR DEHYDRATION OF DAMP DISPERSIVE MATERIALS","authors":"I. Sevostianov, D. Tokarchuk, A. Didyk","doi":"10.37128/2520-6168-2022-3-7","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-3-7","url":null,"abstract":"Dehydration of damp dispersive materials is a wide spread group of processes in food and processing industry. In particular to this group belong processes of separation of damp dispersive waste of food enterprises (alcoholic bard, beer pellets, beet press, coffee and barley slime) at solid and liquid phases. At majority of Ukrainian food enterprises this waste is poured out on the ground or in nearby ponds, but in case of its separation the solid phase of such materials can be used as valuable additive to agricultural fodders or as fuel. As a result, one can provide a complex solution of problems: waste utilization, prevention of nature pollution and receipt of an additional income from realization of fodders or fuel. There are a lot of methods of dehydration of damp dispersive materials that can be divided at several groups: mechanical, thermal, electro-physical, biological, chemical and combined. An improved classification of main methods of dehydration of damp dispersive materials and equipment for their realization is presented in the article. This classification allows to conduct a more systemized and founded analysis of advantages and disadvantages of the methods, to select an optimal method with consideration of conditions and parameters of a concrete enterprise and processed material. Such analysis and selection can be realized with help of a computer program. There is substantiated high efficiency of mechanical dehydration methods of damp dispersive materials, in particular, the method of pressing on equipment with hydraulic or unbalanced drive. There are proposed a block-scheme of an algorithm of automated analysis of methods and equipment for dehydration of damp dispersive materials for selection of admissible and most effective variants of their processing by such main criterions: as productivity, expenses of energy, specific consumption of materials of equipment and final humidity of processed material.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124293894","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":"STUDY OF ICE FORMATION PROCESSES ON OVERHEAD POWER LINES AND DEVELOPMENT OF SYSTEMS TO COMBAT THIS PHENOMENON","authors":"Oleg Gaidamak","doi":"10.37128/2520-6168-2022-2-17","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-2-17","url":null,"abstract":"Icing on the wires of overhead power lines is a big problem to maintain their integrity. The process of icing wires leads to a significant increase in their mass and, accordingly, to large overloads on the wire and electric supports. Exceeding the loads above the permissible ones can cause great damage to power lines. Wires, cables can break, fittings can be damaged and even lead to collapse of electrical poles. At the same time, damage is caused from the undersupply of electricity. This damage may exceed the damage from damage to the elements of power lines.\u0000Ice on the wires usually appear in winter, especially when the warming is going to be replaced by a cold snap and the temperature fluctuates around zero. The problem can be exacerbated by strong wind loads. An increase in air humidity also accelerates the formation of an ice \"coat\" on wires and electrical poles. Under the most unfavorable conditions, the wall thickness of the “fur coat” of ice on the wire can reach more than 70 mm. Such an ice coat can lead to exceeding the maximum permissible loads and damage to the power line, as well as damage from a power outage.\u0000The mechanism of ice formation on overhead power lines, as well as negative damage to power lines and high-voltage pylons under the action of ice load, has been studied. An analysis of the known methods of dealing with ice on power lines has been carried out. An innovative device for combating icing formations is proposed. The advantage of the proposed device is the ability to operate in two modes: vibrating and shock-shaking, which expands its functionality.\u0000In preventive mode, the device operates continuously due to the interaction with alternating current flowing through the wires of power lines in the normal mode of their operation, without the need for shutdown for maintenance, which gives the electromechanical interactions of devices with the wire of the power line a vibrational character and ensures the continuity of the process of removing water drops from the wires at an early stage before ice formation.\u0000Thus, in the preventive mode of operation of the power line, the causes of icing of the wires are eliminated, and not its consequences, which eliminates the need to shut down for maintenance, and reduces the required costs of resources and energy.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129731478","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":"PECULIARITIES OF DETERMINATION OF RECONSTRUCTION POTENTIAL OF ENERGY SOURCE IN THE CONDITIONS OF AVIATION ENTERPRISES","authors":"S. Boiko, Oleksii Zhukov, O. Melnyk, Gennady Rykov, Sergiy Babiy","doi":"10.37128/2520-6168-2022-2-15","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-2-15","url":null,"abstract":"In the context of the world economy, air transport today, among other characteristics, is characterized by high technological complexity of vehicles, increasing the safety of air transport, strengthening measures to protect aviation from acts of unlawful interference and development of modern multimodal transport technologies and infrastructure for various modes of transport. Due to the global trend, unmanned aerial vehicles have become widespread in various areas and sectors of the world economy. Meanwhile, the issue of energy security as a component of aviation security at airfields and specialized enterprises in their operation, storage and maintenance remains unresolved.\u0000The problem of this work is the synthesis of the method of determining the potential of dispersed energy sources in aviation enterprises. Combining the parallel operation of dispersed generation and network will give a synergistic effect - the emergence of new properties that were not in the components, which is manifested, in particular, in increasing factors influencing energy performance, irregularity of the total load schedule of integrated systems, reducing its unevenness in daily, weekly and seasonal sections, reducing the dependence of the frequency of electric current on power balance fluctuations. In previous studies, the authors justify the positive effect of the introduction of sources of dispersed generation in industrial enterprises, namely modularity, reliability, local governance, reducing the negative impact on the environment and short start-up period.\u0000Given the complexity of the technological process and the specifics of the operation of electrical equipment of aviation enterprises, an urgent scientific and practical task is to develop a method for determining the potential of dispersed energy sources in these enterprises.\u0000To determine the potential of sources of dispersed generation in aviation enterprises, it is necessary to have as complete and clear data on electricity supply and power consumption of electrical equipment of these enterprises during the day, as well as data on electricity consumption in the power grid, operation and load consumption.\u0000At aviation enterprises, the introduction of dispersed generation based on renewable energy sources into the general structure of power supply systems is relevant and possible. The proposed method of determining the potential of dispersed energy sources in the conditions of aviation enterprises will allow to effectively implement dispersed generation in the power supply structure of aviation enterprises.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128669896","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":"CALCULATION OF WORK IN ONE APPLIED TECHNICAL TASK WITH DIFFERENT GEOMETRY OF LOCATION AND COMPARISON OF RESULTS","authors":"V. Dubchak, Viktor Pryshlyak","doi":"10.37128/2520-6168-2022-2-6","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-2-6","url":null,"abstract":"The article considers algorithms for constructing equivalent models of filling tanks with agricultural fluids, such as fuels and lubricants, pesticides, organic fertilizers and other bulk solids, which can be equated, the dynamics of movement (resistance, work, power) to the movement of liquid.\u0000Growing requirements in the competitive market cause constant improvement and justification of optimal parameters and forms of tanks for transportation of materials that ensure the production operation of complex technical systems.\u0000The article presents a variety of possible technical solutions for tanks (tanks) for storage and transportation of liquid materials on the field surface with different variable steepness.\u0000Theoretical bases of practical direction of movement of agricultural materials in air and liquid environments for conditions of action of a gravitational field are developed. The technical features of the working bodies and the system for the introduction of liquid materials as needed (changes in soil hardness, slope steepness, speed of the unit) are analyzed.\u0000Innovative development of competitive agro-industrial technologies and agricultural machinery is possible only with the involvement of a powerful physical and mathematical apparatus, which is also problematic due to lack of fundamental theoretical knowledge of designers, designers and students of agro-engineering assistance.\u0000As a result of research using the fundamental analytical and mathematical apparatus, algorithmic models have been developed that describe the movement of liquid (mineral fertilizers) for their movement.\u0000Such processes and phenomena occur during the production operation of agricultural machinery with tanks for moving liquid materials (fertilizers), etc.\u0000The application of the algorithm of mathematical analysis and calculation of technological processes and technical systems provides the necessary conditions for efficient supply of liquid materials, fertilizers, which is important in precision farming systems.\u0000Similar, proposed innovative methods of theoretical and synthesis of processes, phenomena, the nature of agro-industrial production, can be effective in preparing for the educational process of agricultural engineers for project professional activities.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122244249","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 AND PROSPECTS OF TECHNOLOGICAL AND DESIGN FEATURES OF SOWING MACHINES","authors":"S. Hrushetskiy, Oleh Omelyanov","doi":"10.37128/2520-6168-2022-2-3","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-2-3","url":null,"abstract":"To date, sowing is one of the most urgent tasks, therefore, universal sowing equipment is widely in demand, which should ensure a uniform distribution of the number of plants per unit area to create the same conditions for development. It is the sowing machines of this type that will largely solve the problems of timely high-quality sowing with a combination of other technological operations - soil preparation, fertilization, embedding, rolling, etc. At the same time, a significant amount of technical and human resources will be released, sowing dates will be strictly observed.\u0000Accordingly, the purpose of the study was to conduct a comparative analysis and prospects for the technological and design features of sowing machines to improve the operational reliability of the mechanism for copying the relief of sowing machines using advanced structural materials.\u0000The research was carried out by the method of technological and structural analysis of technologies and machines for sowing machines. In the process of research, methods of comparison and mathematical modeling of technological processes were used. The information base of the research was the works of Ukrainian and foreign scientists on technologies and machines for sowing.\u0000On the basis of the comparative analysis and the prospect of technological and design features of sowing machines, it was found that friendly stairs (at least 90%), and, as a result, a high yield depend on the quality of the work of the parallelogram mechanism for copying sowing complexes. The reason for the violation of agricultural requirements for sowing, in particular the depth and uniformity of seed placement, is the low durability of the mechanisms for copying the soil surface. It has been established that the main reason for the low reliability of these mechanisms is the use of \"steel-to-steel\" tribo-couplers in their mobile joints, which ensure operability with frequent (every 40...50 hours of operation) maintenance (lubrication). It has been revealed that it is promising to introduce polymer-composite materials for structural purposes in the movable mates of the parallelogram copying mechanism, which will change the working conditions and increase the durability of this mechanism as a whole.\u0000To solve the problems associated with the development and study of the properties of new or modified PCM in the movable joints of sowing machines, it is necessary to conduct a theoretical justification and experimental feasibility of using polymer parts and their effectiveness. It is necessary to develop a model that describes the dynamics of loads under different operating conditions of the disc coulter. It is also necessary to carry out theoretical calculations that take into account the change in the load on individual nodes of the parallelogram copying mechanism.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128631811","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 AND DEVELOPMENT OF BRIDGE SCHEMES FOR JET POWER CONTROL","authors":"O. Voznyak, O. Tokarchuk, A. Shtuts, Volodymyr Tykhonov","doi":"10.37128/2520-6168-2022-2-16","DOIUrl":"https://doi.org/10.37128/2520-6168-2022-2-16","url":null,"abstract":"Reactive power compensation is one of the components of improving the efficiency of electrical networks, the theoretical foundations of which were developed at the beginning of the last century by Frieze and Budenau. However, the development of effective control algorithms for reactive power compensation devices continues today. It is conducted in two directions - increasing the efficiency of the compensation process, which is mainly determined by the inertia of the control algorithm, and finding effective and compact methods for describing the components of the power of the electrical network. At present, the p-q instantaneous power theory proposed by Akagi and a number of other theories is widely used.\u0000The transition to electronic control methods of power devices, such as electric drive, radio transmitting devices - has dramatically increased the efficiency of such systems, but set an urgent task to ensure optimal conditions for power transmission to load, ie coordination of output stages of power amplifiers and actuators. Such coordination is provided at compensation of reactive components in output circles. To implement this task, it is advisable to use a controlled inductance and capacitance. At the same time, the use of traditional solutions used by varicaps or reactive transistors is limited by the technological possibilities of using varicaps at high reactive capacities. The use of an external power supply is a significant disadvantage, limiting the scope of controlled reactivity based on reactive transistors. Setting the DC mode of controlled reactivity transistors requires the use of additional batteries, blocking and filtering, which reduces the reliability of the device. The use of additional power supplies also reduces the energy efficiency of the device as a whole and limits the use of such devices only to low-power electronic components: frequency modulators, frequency tuners, etc. In power electronics, the power of controlled reactivity is energy inefficient.","PeriodicalId":173336,"journal":{"name":"ENGINEERING, ENERGY, TRANSPORT AIC","volume":"1987 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125471296","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}