bluuebunny/crossref_metadata_2025_split huggingface dataset:
Time-optimal control of heating process subject to phase constraints
Authors: Kichigina O Y , Chekotilo E Y 
Published: November 2019

Abstract
The article presents the results of modeling and optimization of temperature fields by the volume of the workpiece during induction heating using a numerical two-dimensional electromagnetic thermal model of the process. Time-optimal control problem of induction heating subject to constraints on maximum permissible temperature is formulated and solved. The obtained optimal control algorithms lead to an increase in the efficiency of induction heaters by reducing total heating time and absence of defects due to technological limitations.
New approach to measuring the IVC of non-linear inertia-free elements
Authors: Selitrenikov D A , Bodrenkov E A , Gritsutenko S S 
Published: November 2019

Abstract
A technique for measuring the current-voltage characteristics (IVC) of a nonlinear inertia-free element from the amplitude spectrum of a current curve obtained by decomposing it into a Fourier series is given. The initial data for the method are the curves of current and voltage on a nonlinear element, measured for different points in time. The IVC is represented as a ratio of power polynomials whose coefficients are determined by the Cholesky method. Examples of measurement of the current-voltage characteristics are given, estimates of the relative and absolute error of the approach are given. The advantage of the proposed approach in comparison with the existing ones is the better accuracy of the reproduction of the IVC.
Assessment of the consumers’ contribution to the deterioration of the electrical power quality
Authors: Rastvorova I I 
Published: November 2019

Abstract
The article presents the rationale for the further development of the methods that uniquely identify consumers making a major contribution to the deterioration of the quality of electricity in power supply systems of enterprises. A new method that gives an unambiguous result is proposed. This feature is a significant difference from the known methods. The given statements are confirmed by the results of computer simulation that are presented in the article. The method is based on the principle of changing the input resistance of the system implemented by varying the impedance of the transformer windings. An on load tap changer can be used for this purpose. The prospects for applying the method to determine the contribution of individual consumers to the changes in the quality of electric power of the enterprises supply systems in terms of percentage are shown.
Application of power theory for electricity metering in presence of distortion
Authors: Bardanov A I , Pudkova T V 
Published: November 2019

Abstract
At enterprises, electricity metering devices are used everywhere, which incorporate various formulas for calculating power. The division of power into active, reactive and full is valid only in the case of sinusoidal currents and voltages. In the case of non-sinusoidal waveforms of current and voltage, which are most often found in industrial networks of enterprises, it is necessary to use additional concepts and correct formulas for calculating powers in order to avoid errors. The article compares the methods of calculating the power in the non-sinusoidal mode, which can be used to more correctly record electricity in industrial networks of enterprises.
Physical modeling of failures of the automotive alternator
Authors: Puzakov A V 
Published: November 2019

Abstract
The relevance of the problem of automotive alternator diagnosis is associated with the imperfection of existing methods due to their significant complexity and lack of information. In order the accelerate the process of electrical failures diagnosis, the article considers their physical modelling method, the advantages of which are significant acceleration of the experiment, the possibility of modelling several failures, as well as the establishment of a clear boundary between the serviceable and non-serviceable states of the alternator. Adequately simulating the processes occurring in the alternator, physical modelling is implemented by means of serial or parallel connection to the alternator elements of adjustable active resistance. Experimental data show that the most informative and sensitive to the process of failures development is the temperature increase which can serve as the basis for on-board monitoring system aimed at determining the technical condition of an automotive alternator.
Electrical equipment maintenance system with elements of augmented reality technology
Authors: Zhukovskiy Y L , Koteleva N I 
Published: November 2019

Abstract
Any industrial enterprise serves a significant fleet of electrical equipment. Equipment servicing takes place in various ways: according to the schedule and without it, by direct and indirect methods, in manual and automated mode, with or without the involvement of specialists, etc. Timely maintenance prolongs the life of electrical equipment. So technical maintenance is indirectly related to the efficiency of production. Today there are many different technologies that simplify the process of maintenance of electrical equipment. One of these technologies is augmented reality technology. The existing practice of application of augmented reality technology shows that the one of the main difficulty faced by the enterprise is the lack of unified solutions and software modules. As a rule, the electrical equipment maintenance system is developed specifically for each type of equipment; its software modules and components are unique. This article describes the approach of developing a unified module of augmented reality technology for servicing electrical equipment.
Autonomous power supply complex for oil leakage detection system in pipelines
Authors: Belsky A A , Dobush V S , Kuksov N A , Gluhanich D Y 
Published: November 2019

Abstract
In this article an autonomous power supply complex for oil leakage detection system is proposed for pipelines using the units of thermoelectric generators as a power source. Laboratory experimental studies were conducted as well as obtained operating energy characteristics of the complex. A sufficient number of the units of thermoelectric generators for uninterrupted power supply of the data collection point of the oil leak detection system has been defined.
Traction inverter with integrated charger: practical realisation and experimental study
Authors: Sidorov K M , Grishchenko A G , Sidorov B N 
Published: November 2019

Abstract
This article presents some practical designs for combining control functions of AC traction motor and high voltage on-board vehicle battery pack charge using single hardware components and common power circuit. Basic charger and traction inverter integration circuit designs as well as conditions necessary for keeping their power equivalent are described in the article. Based on these circuit designs, the new traction inverter with integrated charger design is suggested. This design has the advantage of high-power density, optimal weight and size ratio and relatively simple control system realisation. The suggested design is recreated in a voltage converter experimental sample. The study results of the created design basic functional characteristics are provided in the article. Traction inverter with integrated charger practical realisation results can be used in the advanced vehicle (electric vehicles, hybrid electric vehicles) development and construction as well as in autonomous power supply systems.
3D model for calculating the impedance of the transformer of the inverter power source of the resistance welding machine
Authors: Sakhno L , Sakhno O , Krylov M , Likhachev D 
Published: November 2019

Abstract
3D model for calculating the short circuit impedance and inductance of the secondary windings bars of a welding transformer are given. An example of calculating these parameters for a transformer with a rated current of 7 kA in the frequency range from 0 up to 1000 Hz are considered. The accuracy of these parameters and calculation time are discussed. The results of transformer impedance calculations using 2D and 3D models are compared. The inductance of the transformer bars is about 70% of the transformer short-circuit resistance.
Electric drives on the basis of doubly fed induction motor
Authors: Avlasko P V , Bronov S A 
Published: November 2019

Abstract
The article describes the design and principle of operation of a doubly fed induction motor, which is a special class of electrical machines that combine two principles – electromagnetic reduction and doubly fed. The methods of control of this motor are listed. Doubly fed induction motor have six control actions, which allows by their combination to create electric drives with different functional properties and principles of construction. A general assessment of the properties and capabilities of an electric drive on the basis of doubly fed induction motor is given.
Development of the solar electric bicycle and its test run on the Russian public roads
Authors: Galushchak V , Soshinov A , Shevchenko N , Elfimova O , Lebedeva Yu 
Published: November 2019

Abstract
The article presents the basic principles for development of electric bicycle transport in cities and towns of Russia. The technical characteristics of sun vehicle, developed by the authors are given. We describe the test run of passenger sun vehicle and three cycle hybrids along the route Volgograd - Sevastopol, with a length of 1350 km. We obtained the comparative characteristics between sun vehicle “TURIST” and industrial samples of electric bicycles. It was shown that solar electric vehicles can be successfully used on Russian public roads.
Prospective electric motors for high speed medical instrument
Authors: Pisarevsky Yu V , Yu Pisarevsky A , Fursov V B , Goremykin S A , Sitnikov N V 
Published: November 2019

Abstract
The article discusses promising designs of high-speed electric motors for autonomous medical instruments. These machines ensure the creation of an autonomous electromechanical tool with low energy consumption, which predetermines the possibility of its use in field conditions. On the other hand, higher ergonomic indicators contribute to better performance of operations.
Study of the stagnation region in HV gas-blast interrupters with synchronous gas injection
Authors: Kurakina N K , Ya Frolov V , Tonkonogov E N 
Published: November 2019

Abstract
According to modern trends in the development of HV gas blast circuit breakers GCB (such as increasing of rated voltage per break) a stagnation region in GCB rises and GCB interrupting ability is reduced. The zone of stagnation has the dominant influence on a thermal-dielectric recovery, since some quantity of hot gas medium remains in this region during the transient voltage recovery wave. The paper studies the stagnation region deformation in double-flow gas-blast interrupters with synchronous gas injection. The interaction between gas jet and the stagnation zone in the vicinity of current zero is discussed. Numerical analysis of basic gas flow with synchronous gas injection between arc contacts of the arc quenching chamber is presented.
Thyristor voltage regulator control algorithm research
Authors: Asabin A A , Kralin A A , Kryukov E V 
Published: November 2019

Abstract
The article deals with the development and research of thyristor voltage regulator (TVR) dual-zone control algorithm in the electrical distribution networks 6-20 kV. The TVR control system hardware and software complex based on the algorithm was developed using LabVIEW and NI myRIO controllers. The transverse, longitudinal and longitudinal-transversal voltage regulation modes experimental research was conducted by the TVR prototype. The experimental research results confirmed the developed algorithm and its program realization effectiveness and efficiency.
State estimation accuracy enhancement for optimal power system steady state modes
Authors: Shehata A A , Ahmed M K 
Published: November 2019

Abstract
State estimation is an important tool for system operators, which determine the state of the system and accordingly act for control and operate the system. Ill conditioned system is a problem facing the state estimation algorithms, which results in numerical instability and inaccurate results of power system state estimation. This paper proposes a method to overcoming the ill-conditioned problem based on their linear correlations between the output parameters for obtaining optimal power systems steady state mode.
Adaptive multi-variable step size P&O MPPT for high tracking-speed and accuracy
Authors: Osman M H , Refaat A 
Published: November 2019

Abstract
Improvement of the output power under different weather conditions is one of the major concerns for photovoltaic (PV) system design. The perturbation and observation (P&O) maximum power point tracking (MPPT) algorithm is the most commonly used technique in practice due to its simplicity and ease of implementation in low-cost hardware. However, the conventional fixed-step P&O tracking method uses a fixed iteration step size based on the requirements of the steady - state accuracy and the speed of the algorithm. In addition, it is very hard to specify the variable step-size scaling factor (M) under fast ripped change of insolation. This paper presents an adaptative multi-variable step-size to solve the trade-off between the speed of the algorithm and efficiency at steady-state. Computer simulation is carried out on MATLAB/Simulink to validate the performance of the proposed algorithm. By using multi-variable step-size algorithm, MPPT response speed and accuracy can be significantly enhanced under rapid change of irradiance compared to one scaling variable step-size P&O method.
Calculation of electrical loads of residential and public buildings based on actual data
Authors: Soluyanov Yu I , Fedotov A I , Ahmetshin A R 
Published: November 2019

Abstract
Design organizations use normative specific load to calculate the power consumed by residential and public building. The practice of construction and operation of urban power supply systems has shown that in most cases real loads are less than calculated ones by 1.5–2 times. A revision of the standard load values is needed based on experimental measurements of power profiles. The newly built cable networks and transformer substations of 10/0.4 kV in fact turn out to be underloaded. Moreover, this underloading is such that transformers rarely operate at 50% of their capacity during hours of maximum power consumption. The death of investments for power grid companies is obvious, since after the nearest site development, it becomes almost impossible to connect a new consumer.
Research of potential on the grounding device in the network with low-impendance resistive neutral grounding
Authors: Chervonchenko S S , Brilinskiy A S 
Published: November 2019

Abstract
The paper discusses the possibility of low-impendance (combined) neutral grounding in the 10-35 kV air network, suggests the logic of the relay protection against single-phase ground faults, and also based on computer simulation of transient processes, the potential of the low voltage network is estimated depending on the current circuit to ground, resistance values of the grounding device and network configuration 0.4 kV. The study is carried out by modeling the real part of the power system of St. Petersburg and the Leningrad region, located in the north-east of the region. Directly considered the distribution network of 110 kV Substation Plodovoe (Substation №. 511).
Pulse-width voltage adjustment
Authors: Veselovskii A P , Kosareva L I , Vostrov K I 
Published: November 2019

Abstract
In recent years there has been significant development of the element base of power electronics. The new circuit and design solutions have appeared, and the capabilities of the power supply systems of electrotechnological, radio-electronic and consumer devices have changed significantly. The current paper analyzes the methods of voltage regulation. The paper shows the method of obtaining an adjustable AC voltage, as well as the device for its implementation. The proposed method allows achieving a significant reduction in weight and size indicators of power supply units of various devices. The implementation of the concept is possible based on the method of modulating the output voltage with high-frequency pulses with varying duty cycle by means of pulsed electronics. Equa-tions for calculating the harmonic components of the Fourier series of a pulse se-quence for a half-sine curve are given. The most dynamically developing direction of power electronics is considered, which is connected with solving the problem of voltage regulation in controlled rectifiers and inverter devices.
Analysis of nonsinusoidal electromagnetic fields in induction units
Authors: Timofeev V N , Vinter E R , Fomin A V 
Published: November 2019

Abstract
The paper contains the analytical analysis of nonsinusoidal electromagnetic field in induction units of metallurgical designation. It considers a pancake coil on the surface of a conductive body and magnetohydrodynamic (MHD) stirrer of liquid metals. The solution is obtained in the form of a Fourier series in a comprehensive way. We have obtained differential and integral properties and the relations of electromagnetic parameters to the value of time constant in the inductor winding. The reconciliation analysis has been completed for the results obtained for the electromagnetic characteristics of the units at supplying them with sinusoidal current.
The research of the properties of the plasma torch on alternating current, for the development of PREP technology
Authors: Kadyrov A A , Ya Frolov V , Yushin B A 
Published: November 2019

Abstract
In recent years, the production of metal powder has become increasingly large-scale, and the requirements for the quality of the obtained powder are becoming stricter (fraction, sphericity, purity, flowability) - this is due not only to the increased demand for powder from standard industries of metallurgy, but also because the emergence and spread of additive technologies. In this article, a new method will be described for the production of metal powders, including titanium ones, the experimental results are given, namely, the value of currents, voltages and gas consumption in various operating modes. As a result of the experiments, a nominal operating mode was identified for one of the installation modules. Electric circuits and calculation model are given.
The usage of low-voltage AC plasma torch for polystyrene gasification
Authors: Obraztsov N V , Safronov A A , Subbotin D I , Ivanov D , Dudnik J D 
Published: November 2019

Abstract
The article describes the plasma-chemical process of polystyrene processing by air low voltage AC plasma torch with a power of up to 500 kW. Polystyrene is a highly toxic compound, so its processing is very important. In this case, it consists mainly of carbon and hydrogen. The thermodynamic calculation of plasma gasification of polystyrene using air plasma and steam was carried out. It is established that the maximum concentration of steam in the gasifying agent is 50%wt . In this case, the plasma enthalpy of 12 MJ/kg is sufficient for the implementation of this process.
Identification of transformer equivalent circuit parameters for transients simulation
Authors: Ivanchenko D I , Salov R A 
Published: November 2019

Abstract
The paper deals with experimental identification of transformer equivalent circuit parameters for simulation purpose. Dependences of transformer voltage and power from primary winding current in open circuit configuration were measured. Current to voltage characteristic of magnetic losses nonlinear resistor, flux to current characteristic of magnetic core, resistance and leakage inductance of primary and secondary windings of one-phase transformer were calculated from the measured parameters. Equivalent circuit of the transformer allowing calculation of transformer transients, such as inrush and overload, was obtained as a result.
PMSM control system with open-end winding and floating bridge capacitor
Authors: Shklyarskiy Y E , Lutonin A S , Palyanicin P S 
Published: November 2019

Abstract
This paper represents structure of permanent magnet synchronous motor (PMSM) control system focused to work in field weakening mode. Structurally it consists of PMSM motor with open end winding, main bridge inverter (MB) with DC voltage at one side of motor winding and floating bridge (FB) inverter with a capacitor at the other side of motor winding. Structure of control system with active and reactive power distribution for MB and FB inverter with capacitor’s voltage level control and motor’s shaft control loops is proposed. Simulation model via Matlab/Simulink and Simscape language is designed. Comparing proposed control system with field oriented PMSM vector control and “Y” motor end winding connection is provided. Obtained results shows that proposed control system helps to reach 1.4 times more maximum speed that a conventional one
Analytical study of heat exchange and efficiency of arc in arc steel-melting furnaces of small and large capacity
Authors: Makarov A N , Okuneva V V , Pavlova Yu M 
Published: November 2019

Abstract
An analytical study of heat transfer and efficiency of arcs in arc steel furnaces of small and large capacity, 1.5-20 tons and 100-120 tons, respectively. We found out that the reason for the increased specific consumption of electricity for melting the batch in small capacity furnaces is the low efficiency of arcs equal to 0.55-0.57 and the corresponding specific energy consumption for melting 475-500 kWh/t. In furnaces of large capacity the efficiency of arcs is 0.78-0.8 and specific energy consumption is 360-375 kWh/t.
Special aspects of application of filter-compensating devices in power supply systems with non-linear electrical receivers
Authors: Averbukh M A , Prasol D A , Zhilin E V 
Published: November 2019

Abstract
This article presents special aspects of selection and application of filter-compensating devices (FCD), made on the basis of passive filters (PF), in power supply systems for various purposes with non-linear electrical receivers (ER). We show the features of various power supply systems with typical consumers of electrical energy. As an example, we consider power supply systems of 0.4 kV for detached houses and of 6-10 kV for industrial enterprises with high-power thyristor DC drives. We describe features of generating higher harmonics (HH) of current and voltage in the considered electrical networks, their harmonic composition and the main negative consequences. We consider main technical means of compensating HH of currents and voltages in power supply systems with nonlinear ER, and analysis of various PF types. The influence of frequency properties on HH compensation is presented as one of the main features of PF application in FCD. Special aspects of selection of PF specific types and its parameters are described on the basis of solving optimization problems. The main methods of FCD design optimization are considered. Based on FCD structure optimization, we proposed their most rational designs for various power supply systems, as well as the results of their application.