Technical Electrodynamics最新文献_第10页

THE EFFICIENCY IMPROVEMENT OF A MULTIPHASE POWER SUPPLY SYSTEM BY USING ENERGY-SAVING SHUNT ACTIVE FILTRATION STRATEGIES 采用节能并联有源滤波策略提高多相供电系统的效率

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.009

M. Artemenko, V. Chopyk, V. Mykhalskyi, Ivan Shapoval, S. Polishchuk

{"title":"THE EFFICIENCY IMPROVEMENT OF A MULTIPHASE POWER SUPPLY SYSTEM BY USING ENERGY-SAVING SHUNT ACTIVE FILTRATION STRATEGIES","authors":"M. Artemenko, V. Chopyk, V. Mykhalskyi, Ivan Shapoval, S. Polishchuk","doi":"10.15407/techned2022.04.009","DOIUrl":"https://doi.org/10.15407/techned2022.04.009","url":null,"abstract":"Minimizing energy losses and increasing the efficiency of a multiphase power supply system by increasing the load power factor using an active shunt filter (SAF) is analyzed. Two SAF control strategies are presented, which provide the maximum efficiency at close to the unit value of power factor or at sinusoidal symmetric currents of the power supply system with any number of phases for non-sinusoidal and asymmetric sources, nonlinear and asymmetric load, and the arbitrary ratio of the resistance of linear and neutral wires. It is shown that the use of direct information about the EMF of a multiphase source as a reference vector of the desired transmission line current does not improve the achieved result of efficiency maximization. A virtual experiment obtained and verified the formula for calculating the efficiency of a multiphase power supply system with an arbitrary load in the form of dependence on load factor and power factor. The power supply system's power factor was determined and experimentally confirmed when applying the SAF strategy to form sinusoidal symmetric currents of a multiphase source. References 10, figures 5.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46303346","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

FORECASTING OF DAILY SCHEDULES OF OVERALL ELECTRICITY IMBALANCES IPS OF UKRAINE 乌克兰综合电力不平衡日计划预测

Technical Electrodynamics Pub Date : 2022-07-04 DOI: 10.15407/techned2022.04.059

V. Sychova

引用次数: 0

DOUBLE-CIRCUIT RESONANT ELECTRIC POWER AMPLIFIER FOR MAGNETIC-PULSE PROCESSING OF METALS 金属磁脉冲加工用双回路谐振功率放大器

Technical Electrodynamics Pub Date : 2022-05-23 DOI: 10.15407/techned2022.03.029

Y. Batygin, S. Shinderuk, E. Chaplygin, D.V. Fendrikov

{"title":"DOUBLE-CIRCUIT RESONANT ELECTRIC POWER AMPLIFIER FOR MAGNETIC-PULSE PROCESSING OF METALS","authors":"Y. Batygin, S. Shinderuk, E. Chaplygin, D.V. Fendrikov","doi":"10.15407/techned2022.03.029","DOIUrl":"https://doi.org/10.15407/techned2022.03.029","url":null,"abstract":"The authors propose and substantiate the functionality of a magnetic-pulse installation consisting of two blocks, the first of which is a resonant double-circuit charger of a capacitive energy storage, and the second block is a discharge circuit with an inductor-tool for performing a given production operation. It is shown that the voltage changes in time according to an exponentially growing harmonic law. It was found that the amplitude of the voltage across the capacitor can be regulated by varying the characteristics of the coupling transformer between the circuits and the characteristics of the circuit of the reactive power conversion unit. Numerical assessments of the characteristics of the charging process showed a high efficiency of voltage formation on the capacitive storage due to resonance phenomena (the transformation ratio is equal to the Q-factor of the circuit ~ 20), which is not comparable with the well-known traditional indicators of induction methods. In terms of phase – the length in time to the maximum charge in the adopted circuit of the active electric power amplifier is set by the inequality - That is, after ~ 30 periods of charging current, the excited voltage reaches a maximum (~ 20 times higher than the source voltage), which will correspond to the end of the transient process and the establishment of a steady state of operation. An example of calculating the characteristics of an elementary resonant base illustrates the effective capabilities of a magnetic-pulse installation, consisting of a resonant charger of a capacitive energy storage and a load in the form of an inductor-tool for flat stamping of metal products. It was found that the square of the ratio of operating frequencies in the load unit and the reactive power amplification unit quantitatively determines the fundamental possibility of resonant amplification of the active electrical energy of a harmonic signal. References 12, figures 5.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46624863","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

INTENSIFICATION OF HEAT AND MASS TRANSFER IN INDUCTION CHANNEL FURNACES 感应通道炉内传热传质强化

Technical Electrodynamics Pub Date : 2022-05-23 DOI: 10.15407/techned2022.03.049

O. I. Bondar, Y. Goryslavets, A. Zharkin

引用次数: 1

INFLUENCE OF PARAMETERS OF WATER MOVEMENT AT ITS TREATMENTS ON ENERGY EFFICIENCY PULSE BARRIER DISCHARGE 处理水运动参数对脉冲阻挡放电能量效率的影响

Technical Electrodynamics Pub Date : 2022-05-23 DOI: 10.15407/techned2022.03.062

V. Bereka, I. Bozhko, I. Kondratenko

{"title":"INFLUENCE OF PARAMETERS OF WATER MOVEMENT AT ITS TREATMENTS ON ENERGY EFFICIENCY PULSE BARRIER DISCHARGE","authors":"V. Bereka, I. Bozhko, I. Kondratenko","doi":"10.15407/techned2022.03.062","DOIUrl":"https://doi.org/10.15407/techned2022.03.062","url":null,"abstract":"A study of the energy efficiency of the pulsed barrier discharge during water treatment in the aerosol state depending on the energy of the pulses (21-72 mJ), their repetition rate (50-300 Hz), the concentration of organic impurities in water (50-100 mg / l) and water content (1.6−3.2%) in the water-air mixture. The discharge was generated by unipolar short pulses (~ 100 ns) in an electrode system with vertically arranged cylindrical electrodes with a diameter of 2 mm, the distance between which was 2 mm. The highest energy yield, which was obtained by decomposing the impurity by 90%, was 32 g / kWh. In order to determine the influence of water movement parameters on the energy efficiency of a pulsed barrier discharge under similar conditions, the energy efficiency of this type of discharge during water movement in film, drip and aerosol states was compared. It is concluded that water treatment should be carried out in the drip state on the submillimeter size of the drops. In the case of such water movement, the energy efficiency of the pulsed barrier discharge is ≈30% higher than in aerosol. References 15, figures 6, table 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42586043","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

DIGITAL PHASE-LOCKED LOOP SYSTEM OF RESONANCE VOLTAGE INVERTER 谐振电压逆变器数字锁相环系统

Technical Electrodynamics Pub Date : 2022-03-19 DOI: 10.15407/techned2022.02.027

I. Zubkov, V. Hutsaliuk, O. Yurchenko

引用次数: 0

COMPLEX DESIGN TOOLS FOR IMPROVEMENT OF ELECTROMECHANICAL SYSTEMS WITH INDUCTION MOTORS 用于改进感应电机机电系统的复杂设计工具

Technical Electrodynamics Pub Date : 2022-03-19 DOI: 10.15407/techned2022.02.052

O. Popovych, I. Golovan

引用次数: 1

TECHNICAL AND ECONOMIC EVALUATION OF ENERGY STORAGE SYSTEMS USE ELECTRICITYFOR STABILIZATION OF SOLAR POWER PLANT OPERATION 储能系统利用电能稳定太阳能电站运行的技术经济评价

Technical Electrodynamics Pub Date : 2022-03-19 DOI: 10.15407/techned2022.02.070

І.М. Buratynskyi

{"title":"TECHNICAL AND ECONOMIC EVALUATION OF ENERGY STORAGE SYSTEMS USE ELECTRICITYFOR STABILIZATION OF SOLAR POWER PLANT OPERATION","authors":"І.М. Buratynskyi","doi":"10.15407/techned2022.02.070","DOIUrl":"https://doi.org/10.15407/techned2022.02.070","url":null,"abstract":"The article considers the problems that arise during the operation of high-power photovoltaic solar power plants as part of integrated power systems. The necessity of using energy storage systems to stabilize the operation of solar power plants is described and the calculated mathematical model of their joint operation is given. A study of the operation of a solar power plant with a fixed capacity of photovoltaic modules of 20 MW together with the energy storage system and determined the capacity of batteries needed to stabilize the power supply of electricity to the grid. For the day with the largest volumes of electricity production, in order to fully stabilize the operation of a solar power plant, it is necessary to release 41% of all generated electricity directly into the grid, and other volumes must be accumulated with subsequent discharge. Connecting batteries to a solar power plant allows to reduce the installed capacity of inverters from 18 to 3-5 MW, which reduces the cost of electricity production by 13-16%. According to the data on capital investment and operating costs during the entire period of operation solar power plants together with the energy storage system for the built in 2020 and 2040, the levelized cost of energy, storage and supply into the grid was determined. References 12, figures 5, table 1.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43826064","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

FEATURES OF THE FORMATION OF MULTI-CHANNEL PULSE CURRENTS AND FAST-MIGRATING ELECTRIC SPARKS IN THE LAYER OF CURRENT-CONDUCTING GRANULES OF ELECTRIC-DISCHARGE INSTALLATIONS 放电装置导电颗粒层中多通道脉冲电流形成及快速迁移电火花的特点

Technical Electrodynamics Pub Date : 2022-03-19 DOI: 10.15407/techned2022.02.003

A. Shcherba, N. Suprunovska, M. Shcherba

{"title":"FEATURES OF THE FORMATION OF MULTI-CHANNEL PULSE CURRENTS AND FAST-MIGRATING ELECTRIC SPARKS IN THE LAYER OF CURRENT-CONDUCTING GRANULES OF ELECTRIC-DISCHARGE INSTALLATIONS","authors":"A. Shcherba, N. Suprunovska, M. Shcherba","doi":"10.15407/techned2022.02.003","DOIUrl":"https://doi.org/10.15407/techned2022.02.003","url":null,"abstract":"The paper reveals the electro-physical features of the formation of multi-channel pulse currents and fast-migrating electric sparks in the layer of current-conductive granules of electric-discharge installations (EDIs) with reservoir capacitors. Such features make it possible to increase many times the productivity of the electric-spark dispersion of metal granules during single discharge current of reservoir capacitors, which flows between the electrodes of EDIs. Theoretical substantiation and experimental confirmation of multi-channel spark discharges in the layer of conductive granules are presented. The influence of the capacitance and charge voltage of reservoir capacitors on the nature of transient processes in the discharge circuit of the EDIs is investigated. The dependence of the effective value of the active load resistance of the EDIs on the value of the pre-charge voltage of its reservoir capacitors and the value of its capacitances has been experimentally determined. It is proved that an increase in the averaged Q-factor of the discharge circuit with an increase in the charge voltage of the capacitor bank of EDI is caused by a decrease in the effective value of the active resistance of the layer of metal granules when spark-generating discharge currents flow through it. References 16, Figures 7.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47052083","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: 2

IDENTIFICATION OF THE POWER OF THE IMBALANCE OF THE THREE-PHASE FOUR-WIRE POWER SUPPLY SYSTEM FOR THE NEEDS OF ITS DISTRIBUTED COMPENSATION 识别三相四线制供电系统的功率不平衡，对其进行分布式补偿的需要

Technical Electrodynamics Pub Date : 2022-03-19 DOI: 10.15407/techned2022.02.012

M. Artemenko, V. Chopyk, V. Mikhalsky, Ivan Shapoval, S. Polishchuk

{"title":"IDENTIFICATION OF THE POWER OF THE IMBALANCE OF THE THREE-PHASE FOUR-WIRE POWER SUPPLY SYSTEM FOR THE NEEDS OF ITS DISTRIBUTED COMPENSATION","authors":"M. Artemenko, V. Chopyk, V. Mikhalsky, Ivan Shapoval, S. Polishchuk","doi":"10.15407/techned2022.02.012","DOIUrl":"https://doi.org/10.15407/techned2022.02.012","url":null,"abstract":"The idea of distributed active filtration is to compensate for the currents of higher harmonics and undesirable components of the power of the main network with inverters of renewable energy converters of the connected microgrid, which have reserves of apparent power. For the convenience of distributed compensation, it is proposed to identify the sinusoidal mode of the three-phase four-wire power system, provided that the symmetric source is six mutually orthogonal components of the three-coordinate vector of line currents. The power of imbalance is shown to be due to four mutually orthogonal components of the three-coordinate vector of line currents with defined reference voltage vectors, each of which is proportional to a separate orthogonal component of the power of imbalance. Integral formulas for determining the scalar values of the four specified orthogonal components of imbalance powers have been obtained, which open the possibility of accounting for their contribution to the deterioration of the quality of electrical energy and the synthesis of control signals for active distributed filtration. The connection between the four specified orthogonal components of the power of imbalance and the parameters of the linear unbalanced load was established, which made it possible to verify these integral formulas using a computer experiment. It is analytically established and experimentally confirmed that the squares of the two orthogonal components of the imbalance powers associated with the current of the neutral wire are included in the decomposition of the square of apparent power and power losses with the multiplier, depending on the ratio of the resistances of the transmission line of the three-phase four-wire power system. References 17, figures 3.","PeriodicalId":38557,"journal":{"name":"Technical Electrodynamics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46199664","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