Russian Electrical Engineering

Russian Electrical Engineering is a peer-reviewed journal exclusively focused on electrical engineering, disseminating the most recent findings from research studies concerning the design, application, and enhancement of equipment within the electrical engineering sector. The journal publishes original manuscripts submitted in English, as well as works translated from other journals. The sources of content are indicated at the article level. The peer review policy of the journal is independent of the manuscript source, ensuring a fair and unbiased evaluation process for all submissions. As part of its aim to become an international publication, the journal welcomes submissions in English from all countries.
 

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The journal follows the Springer Nature Peer Review Policy, Process and Guidance, Springer Nature Journal Editors' Code of Conduct, and COPE's Ethical Guidelines for Peer-reviewers.
Approximately 15% of the manuscripts are rejected without review based on formal criteria as they do not comply with the submission guidelines. Each manuscript is assigned to one peer reviewer. The journal follows a single-blind reviewing procedure. The period from submission to the first decision is up to 40 days. The approximate rejection rate is 20%. The final decision on the acceptance of a manuscript for publication is made by the Editor-in-Chief.
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Том 90, № 12 (2019)

Article

Mathematical Models of the Operating Modes of Power Autotransformers
Lavrov A., Shlyapnikov A.
Аннотация

The mathematical description of operation and voltage regulation of step-down and step-up double-wound power autotransformers has been considered. It has been shown that the available mathematical models of step-down and step-up double-wound autotransformers do not reflect the true physical meaning of its operation. The idling modes and operation under load of a double-wound power autotransformer have been considered, and systems of equations of its operation in up and down modes have been created. The systems of equations refine the existing mathematical models, satisfy the classical representation of physical processes of autotransformer operation, and are universal for description of the idling modes and operation under load. Vector diagrams of autotransformers have been constructed on the basis of the suggested systems of equations.

Russian Electrical Engineering. 2019;90(12):757-762
pages 757-762 views
Experience in the Development of Valve Diesel-Generator Sets with Variable Rotation Frequency
Grigoriev A., Malyshev S., Zainullin R.
Аннотация

Most diesel generators (DGs) in stand-alone electric power plants operate in accordance with a regulatory characteristic with a constancy of rotation frequency in a wide range of load changing. This has a number of negative consequences, including increased fuel and lubricant consumption. The traditional method of solving the problem, which consists in increasing the number of DGs or using generators with different power, increases the equipment cost and decreases weight–dimension factors. Another solution is related to regulation of DGs by a characteristic that is optimal in terms of the criterion of fuel and lubricant consumption, when the rotation frequency depends on load. DGs can operate with a variable rotation frequency when the generator is equipped with a semiconductor converter and the valve operation mode is implemented. Using valve DGs in stand-alone electric power plants makes it possible to apply generator sets with equal power and reduces their number. The results of experimental studies of a valve DG operating at a variable rotation frequency as part of stand-alone ship electric power plant are presented in the work.

Russian Electrical Engineering. 2019;90(12):763-766
pages 763-766 views
Calculations of the Electromechanical Processes during Parametric Optimization of the Distribution Systems of Active and Reactive Loads of Ship Power Plants
Vasin I., Voskobovich V., Kholmogorov V.
Аннотация

A mathematical model of a ship power plant (SPP) to study dynamic modes of the active and reactive load distribution system using the parametric optimization of adjustable parameters has been presented. The algorithm that minimizes the time of transient processes in different modes of SPP operation has been developed for parametric optimization of the active and reactive load distribution system. The calculations of electromechanical processes during of parametric optimization of the load distribution system of an SPP have been carried out in the MATLAB package using mathematical models and numerical methods.

Russian Electrical Engineering. 2019;90(12):767-773
pages 767-773 views
A Study of Adaptive Electromechanical Tracking Systems Intended for Controlling a Four-Link Manipulation Robot
Putov V., Shelud’ko V., Fu N., Shy C.
Аннотация

This article considers adaptive electromechanical tracking systems intended for controlling multilink mechanical objects with actuating electric drives and synthesized taking and not taking into account electromagnetic behavior of electric drives. A bicascade mathematical model of a multilink mechanical object is developed taking account the electromagnetic behavior of actuating electric drives. Adaptive electromechanical tracking systems constructed using the Li–Slotine technique and a step-by-step procedure are synthesized. The construction of a special regressor matrix, taking into account the structure of actuating electric drives, is considered. The suggested technique of bicascade synthesis of adaptive electromechanical tracking systems, which was constructed taking into account the electromagnetic behavior of actuating electric drives, is illustrated by means of a detailed application of the developed synthesis techniques through the example of constructing adaptive electromechanical tracking systems for controlling a four-link manipulation robot made by Igus. The paper also provides the results of computer-aided modeling of the way in which the electromagnetic behavior of actuating electric drives influences the quality of transient processes and the program path reproduction accuracy treated as a singular perturbation or taken into account in synthesizing adaptive electromechanical tracking systems. The motion of the four-link manipulation robot is designed and modeled in the Mathcad and MATLAB/Simulink suites.

Russian Electrical Engineering. 2019;90(12):774-780
pages 774-780 views
Electrotechnical Problems during Induction Hardening of Large Products
Demidovich V., Perevalov Y.
Аннотация

Modern installations of induction heat treatment of large rolls of rolling mills are considered. The equipment and technology of induction heat treatment of mill rolls should be designed so as to guarantee heat-treatment quality. The main electrotechnical problems arising when designing induction heat treatment equipment for large rolls of rolling mills are formulated. The power supply circuits of the installation for hardening of the rolls were selected and justified, and the main problems arising when developing inductors are set out. The choice of operating current frequency is considered. A new structure of inductors for hardening of large rolls is proposed. Computer models for calculating the electromagnetic and temperature fields upon heat treatment of rolls are developed. A universal method of digital design of induction heat treatment installations is considered. The energy characteristics of inductors for hardening of the rolls of rolling mills are analyzed. The developed digital twin of inductors makes it possible to significantly shorten the experimental investigations of induction hardening of the rolls and the conditions of startup works and use digital control systems to achieve the highest quality of heat treatment of the rolls.

Russian Electrical Engineering. 2019;90(12):781-785
pages 781-785 views
Expanding Control Range of Nonlinear Precision Tracking Systems with a Linear Electric Motor by Means of Adaptive Control
Kuznetsov V., Chung P., Konstantinov S.
Аннотация

This paper considers the mathematical description of a servo drive system with a linear electric motor for the direct valve control system instead of the flapper–nozzle system. The description relies on the physical approach to determining electromagnetic parameters and electromechanical characteristics of electric motors. The obtained nonlinear traction characteristic and the resulting characteristic from the action of electromagnetic force and elasticity of the centering spring are used to determine the motor stroke limitations. The nonlinear action of counter-EMF against a rising electromagnetic time constant is substantiated. The solution proposed for the electrohydraulic tracking system is an adaptive control algorithm with an exomodel synthesized by the Lyapunov method that provides dissipativity of adaptation processes and expands the control range. The results of the practical tests of the adaptive control system are considered by the example of a servo system in the MATLAB/Simulink suite and on physical servo drive models.

Russian Electrical Engineering. 2019;90(12):786-792
pages 786-792 views
Parametric Optimization of Power Supply Circuits for Electrotechniques
Blinov K., Blinov Y.
Аннотация

When analyzing the circuits of power supplies for electrotechniques, the initial problem is solved. By means of solving the system of differential equations at each step of integration, the vector of unknown currents and voltages across circuit elements during the transient process can be obtained. As a result, the steady-state mode of power supply operation is attained. This mode can be also obtained when solving the boundary problem. In this case, discretization of the system of differential equations is carried out at the integration step and, then, the system of algebraical equations through the whole period of a steady-state mode is written. The solution of this sparse matrix with a regular structure allows one to determine all the unknown quantities in the circuit in the steady-state mode. An additional equation, which can be expressed in terms of circuit voltages and currents, is introduced in this system of equations, e.g., the equation of power released in the load at a given resistor resistance. The solution of the unified system allows one to obtain both the load resistance and the whole vector of voltages and currents, which correspond to this parameter.

Russian Electrical Engineering. 2019;90(12):793-796
pages 793-796 views
A Method for Identification of External Disturbing Influences on Electric Drives of a Large Radio Telescope
Belov M., Phuong T., Kozlova L.
Аннотация

It is proposed to apply a neural network observer in the problems of identification of an external disturbance in the form of a wind load acting on the main mirror of a large radio telescope. The mathematical description of the wind moment is analyzed taking into account its fluctuating component, which has a nonlinear random character. A method of constructing the structure of recurrent neural networks based on models of a nonlinear autoregressive with exogenous inputs for identification of nonlinear static and dynamic control objects is described. In computer simulation, the RMS error for different training algorithms is compared to study their identification accuracy. Design, training, and testing of recurrent neural networks is carried out in the MATLAB/Simulink software environment.

Russian Electrical Engineering. 2019;90(12):797-801
pages 797-801 views
A New Russian Way to Vitrify Radioactive Waste by Induction Melting in Cold Crucibles
Vavilov A., Skrigan I., Lopukh D., Martynov A.
Аннотация

This paper is written mainly as a review of the first results of the implementation in Russia of a new electrotechnological conception of how to construct a plant for vitrifying radioactive waste (RAW) by induction melting in a cold crucible (IMCC). The study considers pilot RAW IMCCR plants and their variants in Russia and abroad with an enhanced capacity and low frequency so as to make the equipment more productive and reliable in operation. Additional steps are proposed and tested for inclusion in the conception to increase the service life of equipment and control systems.

Russian Electrical Engineering. 2019;90(12):802-806
pages 802-806 views
Prediction of Physical Properties of Steels Using Artificial Neural Networks for Numerical Simulation of Electrical Installations
Chmilenko F., Bondar A., Streltsova O., Bondarenko D.
Аннотация

For modern electric installations to be competitive, they should be supported by numerical simulations of high quality and accuracy. In turn, to improve the accuracy of numerical simulation of electric installations, it is required to take into account the thermal-physical, electromagnetic, and mechanical properties of materials as much as possible. This article discusses the possibility of predicting the properties of carbon steels on the basis of their chemical composition for a wide temperature range using a set of artificial neural networks as exemplified by electrical resistivity. Training and verification of neural networks have been based on experimental data from reference books and databases. The methods have been applied so as to avoid retraining of neural networks, as well as to use initial data more completely. The training results of neural networks are given, the error level is evaluated, and the potential is determined of applying neural networks to production of material properties and, as a consequence, improving simulation quality.

Russian Electrical Engineering. 2019;90(12):807-811
pages 807-811 views

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