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EXTERNAL DAMPHER SYSTEM OF THE SALIENT POLE SYNCHRONOUS MACHINE 凸极同步电机外阻尼系统
Technical Electrodynamics Pub Date : 2022-10-27 DOI: 10.15407/techned2022.06.019
Yu.M. Vaskovsky, K. Tatarinov
{"title":"EXTERNAL DAMPHER SYSTEM OF THE SALIENT POLE SYNCHRONOUS MACHINE","authors":"Yu.M. Vaskovsky, K. Tatarinov","doi":"10.15407/techned2022.06.019","DOIUrl":"https://doi.org/10.15407/techned2022.06.019","url":null,"abstract":"A comparative analysis of the characteristics of the salient pole synchronous machine for two variants of the rotor damping system design was performed by mathematical modeling methods. In the first embodiment, a traditional (internal) damping rotor system is used, which is made of electrically conductive rods immersed in the surface of the poles. In the second em-bodiment, the external damping system of the rotor is made in the form of conductive sheets fixed to the surface of the poles. It is noted that the external damping system of the rotor provides better asynchronous characteristics and is characterized by more uniform heating, which reduces the thermomechanical loads of structural elements. This design increases the reliability of the machine not only in the event of short-term asynchronous modes of operation, but also in the event of uneven air gap between the stator and rotor, which usually occurs during long operation of high-pole synchronous machines, such as hydro generators. References 10, figures 6.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47733492","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}
引用次数: 0
GENERALIZED IDENTIFIER OF THE PRESENCE OF DISTORTIONS OF QUALITY OF ELECTRICITY 电能质量失真存在的广义标识符
Technical Electrodynamics Pub Date : 2022-10-27 DOI: 10.15407/techned2022.06.072
A. Voloshko
{"title":"GENERALIZED IDENTIFIER OF THE PRESENCE OF DISTORTIONS OF QUALITY OF ELECTRICITY","authors":"A. Voloshko","doi":"10.15407/techned2022.06.072","DOIUrl":"https://doi.org/10.15407/techned2022.06.072","url":null,"abstract":"Development of measures to ensure the quality of electricity is possible only after assessing the actual state of electricity quality in all nodes of the electricity network. Therefore, the system of ensuring the required quality of electricity should be based on its monitoring system. An approach to building a real-time electricity quality monitoring system by developing a generalized identifier for the presence of electricity quality distortion regardless of its type is presented, time of occurrence and duration based on the construction of spatio-temporal distribution of the information signal and subsequent orthogonal analysis of frequency-temporal changes of its spectral components. This allows the creation of a system of real-time monitoring of electricity quality in contrast to existing methods, when using which the sequential processing of the measuring signal is carried out to determine certain indicators of the quality of electric energy, which makes it impossible to conduct it in real time. References 10, figures 2.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42679348","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}
引用次数: 0
ON SOME INFLUENCES OF THE COMPOSITION OF GENERATING CAPACITIES ON DYNAMIC PROPERTIES OF POWER SYSTEMS 发电容量构成对电力系统动态特性的影响
Technical Electrodynamics Pub Date : 2022-10-27 DOI: 10.15407/techned2022.06.042
O. Butkevych, T. M. Hurieieva, V. Chyzhevskyi, N. T. Yunieieva
{"title":"ON SOME INFLUENCES OF THE COMPOSITION OF GENERATING CAPACITIES ON DYNAMIC PROPERTIES OF POWER SYSTEMS","authors":"O. Butkevych, T. M. Hurieieva, V. Chyzhevskyi, N. T. Yunieieva","doi":"10.15407/techned2022.06.042","DOIUrl":"https://doi.org/10.15407/techned2022.06.042","url":null,"abstract":"The analysis results of the composition changes' impact in the power systems' (PSs) generating capacities on natural frequencies and electromechanical transient processes in the PSs are given. The cases when specified changes are a consequence of the introduction of generation sources groups which will partially replace the generating capacities of thermal power plants were considered. In this research well-known test two-area (4-machine) and 6-machine PS schemes were used. References 10, figures 5, tables 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46338662","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}
引用次数: 1
ANALYSIS OF PROCESSES IN A CUK CONVERTER WITH ISOLATED STRUCTURE USING THE AVERAGING METHOD 用平均法分析隔离结构CUK变换器的过程
Technical Electrodynamics Pub Date : 2022-10-27 DOI: 10.15407/techned2022.06.013
Yu.V. Rudenko
{"title":"ANALYSIS OF PROCESSES IN A CUK CONVERTER WITH ISOLATED STRUCTURE USING THE AVERAGING METHOD","authors":"Yu.V. Rudenko","doi":"10.15407/techned2022.06.013","DOIUrl":"https://doi.org/10.15407/techned2022.06.013","url":null,"abstract":"The processes in the Cook converter with an isoted transformer have been studied using the averaging method based on Lagrange's theorems in the mode of continuous currents and voltages in accumulating reactive elements. A mathematical model of the device based on relative variables is developed. Based on the developed model, analytical relations were obtained for the calculation of current ripple in the input and output chokes, as well as the voltage in the storage capacitors. Analytical dependences have been developed to determine the maximum values of currents and voltages in the switching elements of the converter in the entire switching range, which allows to reasonably select these elements of the device with acceptable parameters at the design stage. It is shown that neglecting the leakage inductance of the isolated transformer in the Cook converter when using expressions based on the developed mathematical model within certain limits of the transformation coefficient greatly simplifies their analytical appearance and use and does not lead to significant (more than 4-5%) deviations in calculation accuracy. References 10, figures 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47922675","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}
引用次数: 0
MODERN PROBLEMS OF CHP FUNCTIONING IN UKRAINE 乌克兰热电联产运作的现代问题
Technical Electrodynamics Pub Date : 2022-10-27 DOI: 10.15407/techned2022.06.052
B. Basok, S. Dubovskyi, P. Kudelya
{"title":"MODERN PROBLEMS OF CHP FUNCTIONING IN UKRAINE","authors":"B. Basok, S. Dubovskyi, P. Kudelya","doi":"10.15407/techned2022.06.052","DOIUrl":"https://doi.org/10.15407/techned2022.06.052","url":null,"abstract":"A brief analysis of the state, problems and external conditions of operation of combined heat and power plants in Ukraine, as well as their changes during hostilities. Issues and proposals for the choice of rational modes of operation of CHP in the conditions of primary fuel shortage, reduction of electrical loads of the energy system, the risk of possible damage to energy equipment during hostilities and in the postwar recovery. It is proposed to develop and implement in the practice of planning the development of survivability criteria of stations with connected district heating systems. References 7, figures 4.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46621380","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}
引用次数: 1
METHODS FOR IMPROVING THE NOISE IMMUNITY OF HIGH-PRECISION LASER OPTOELECTRONIC SYSTEMS FOR MEASURING LINEAR DISPLACEMENTS 提高高精度直线位移测量激光光电系统抗噪性的方法
Technical Electrodynamics Pub Date : 2022-08-18 DOI: 10.15407/techned2022.05.082
I.O. Brahynets, Yu.O. Masjurenko
{"title":"METHODS FOR IMPROVING THE NOISE IMMUNITY OF HIGH-PRECISION LASER OPTOELECTRONIC SYSTEMS FOR MEASURING LINEAR DISPLACEMENTS","authors":"I.O. Brahynets, Yu.O. Masjurenko","doi":"10.15407/techned2022.05.082","DOIUrl":"https://doi.org/10.15407/techned2022.05.082","url":null,"abstract":"It is shown that in high-precision optoelectronic systems for measuring the linear displacements of objects with diffuse-reflecting surface, built on the basis of phase laser rangefinders, to ensure a given accuracy, it is necessary to compensate for the effect on the measurement of harmonic noise. Methods of compensation of this influence which are based on use of various algorithms of measurement of a phase shift proportional to distance which is defined are considered and analyzed. The disadvantages and advantages of each of the methods are evaluated, recommendations for their use are made. It is proposed to compensate for the harmonic interference of the use of electro-optical switches. References 12, figures 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45384707","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}
引用次数: 0
MATHEMATICAL MODEL FOR ANALYSIS OF TRANSIENT IN TWO-WINDINGS TRANSFORMERS IN THE STRAIGHTS METHOD 用直线法分析两绕组变压器暂态过程的数学模型
Technical Electrodynamics Pub Date : 2022-08-18 DOI: 10.15407/techned2022.05.018
 М.С. Сегеда, П.Ф докт. техн. наук, Гоголюк, Ю.В канд. техн. наук, Близнак
{"title":"MATHEMATICAL MODEL FOR ANALYSIS OF TRANSIENT IN TWO-WINDINGS TRANSFORMERS IN THE STRAIGHTS METHOD","authors":" М.С. Сегеда, П.Ф докт. техн. наук, Гоголюк, Ю.В канд. техн. наук, Близнак","doi":"10.15407/techned2022.05.018","DOIUrl":"https://doi.org/10.15407/techned2022.05.018","url":null,"abstract":"A mathematical model of a two-winding transformer for research of fast transient processes in windings in the form of an electromagnetic circuit, taking into account the main magnetic flux, own and mutual interturns and interwinding dissipation fluxes, transverse turns and longitudinal interwinding capacitances of the winding, is developed by using the straights method. The created model simplifies engineering calculations of fast transient processes in windings by applying the methods of the theory of electromagnetic circuits instead of the methods of mathematical physics, which are difficult for practical application. Transient processes and voltage distribution in transformer windings, under the action of pulse overvoltage in the form of a standardized pulse, are researched. References 8, figures 4.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41508848","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}
引用次数: 0
FORMATION OF BIPOLAR PULSE CURRENTS IN THE LOAD OF CAPACITIVE ENERGY STORAGES OF ELECTRIC DISCHARGE INSTALLATIONS 放电装置电容储能器负载中双极脉冲电流的形成
Technical Electrodynamics Pub Date : 2022-08-18 DOI: 10.15407/techned2022.05.003
A. Shcherba, N. Suprunovska
{"title":"FORMATION OF BIPOLAR PULSE CURRENTS IN THE LOAD OF CAPACITIVE ENERGY STORAGES OF ELECTRIC DISCHARGE INSTALLATIONS","authors":"A. Shcherba, N. Suprunovska","doi":"10.15407/techned2022.05.003","DOIUrl":"https://doi.org/10.15407/techned2022.05.003","url":null,"abstract":"A method is proposed for stabilizing the transient discharge processes of capacitive energy storages (CESs) of electric discharge installations (EDIs) to a load whose electrical resistance can vary non-linearly and stochastically. The method is based on the use of one direct voltage generator (DVG) in the EDI, which carries out alternately an oscillatory charge of two CESs to the required voltage, as well as on the introduction of semiconductor switches into the charge circuit and discharge one of these CESs and the developed algorithms for switching them on, according to which bipolar discharge currents are formed alternately in the EDI load, regardless of the nature of the change in its electrical resistance. The frequency and duration of positive and negative discharge-pulse currents in the load can be the same or different, depending on the selected parameters of the elements of discharge circuits of the two CESs. The use of the developed method provides the formation of unipolar modes in the capacitors of each CES, which allows you to choose them for lower voltages, increase their life and reduce cost. In addition, with the same capacitance of the CESs, the total electric charge flowing in the load is practically zero after each even number of discharges. This significantly reduces the effect of electrochemical processes in the load, in particular the electrochemical destruction of the anode of the technological apparatus of the EDI, which inevitably occurs during the formation of unipolar pulse currents. The use of bipolar discharge currents in the EDI load also increases the stability of the discharge modes in the EDI due to the limitation of the duration of possible long aperiodic currents during the discharge of one of the CESs by the beginning of the counter current of the next discharge of the other CES. References 10, figures 3, table 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49028053","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}
引用次数: 0
COMPUTATIONAL METHOD OF NODAL TRANSFORMATION OF THE PRICING PROCESS IN THE ELECTRICITY MARKET 电力市场定价过程的节点变换计算方法
Technical Electrodynamics Pub Date : 2022-08-18 DOI: 10.15407/techned2022.05.067
Z. Borukaiev, V. Evdokimov, K. Ostapchenko
{"title":"COMPUTATIONAL METHOD OF NODAL TRANSFORMATION OF THE PRICING PROCESS IN THE ELECTRICITY MARKET","authors":"Z. Borukaiev, V. Evdokimov, K. Ostapchenko","doi":"10.15407/techned2022.05.067","DOIUrl":"https://doi.org/10.15407/techned2022.05.067","url":null,"abstract":"The main attention in the article is given to the development of the method of nodal transformation of the pricing process in the electricity market. The sequence of implementation of the main constructive stages of its development and further use is given, such as: descriptions of the pricing process; formalization of the pricing process; development of computational procedures for building a simulation model of the pricing process. A distinctive feature of this method from the known and described in the scientific literature is the direct connection of the dynamic energy flow at all stages of the technological process of production, transmission and distribution of electricity with the economic flow. The computational procedures of the method are implemented using the discrete-event approach. The method is designed to build a simulation model of the pricing process in the electricity market, which along with a system of short-term price forecasting models in different market segments, becomes the key in the information and methodological support of multi-agent environment for the market agents interaction. References 13, figures 2.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42076281","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}
引用次数: 0
THREE-DIMENSIONAL MATHEMATICAL MODEL OF THREE-PHASE HEAT GENERATOR OF INDUCTION TYPE BASED ON THE METHOD OF SECONDARY SOURCES 基于二次源法的感应式三相热发生器三维数学模型
Technical Electrodynamics Pub Date : 2022-08-18 DOI: 10.15407/techned2022.05.008
 А.В. Жильцов, А.О докт. техн. наук, Березюк, Т.В канд. техн. наук, Виштак, A. V. Zhyltsov, A. .O.Bereziuk, T. V. Vishtak
{"title":"THREE-DIMENSIONAL MATHEMATICAL MODEL OF THREE-PHASE HEAT GENERATOR OF INDUCTION TYPE BASED ON THE METHOD OF SECONDARY SOURCES","authors":" А.В. Жильцов, А.О докт. техн. наук, Березюк, Т.В канд. техн. наук, Виштак, A. V. Zhyltsov, A. .O.Bereziuk, T. V. Vishtak","doi":"10.15407/techned2022.05.008","DOIUrl":"https://doi.org/10.15407/techned2022.05.008","url":null,"abstract":"A three-dimensional mathematical model of a three-phase induction heat generator with a load in the form of a ferromagnetic conductive tubes beam has been developed on the basis of the secondary method. The magnetic system symmetry of the heat generator is taken into account, which significantly reduced the search area of unknown electromagnetic field secondary sources densities. References 5, figures 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49666177","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}
引用次数: 1
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