Studies of Possibilities of Energy Efficiency of Asyncronous Motors Improvement

Burkov, Aleksey; Юрин, В. Н.; Аветисян, В. Р.

doi:10.30724/1998-9903-2018-20-9-10-92-100

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

2019

DOI: 10.30724/1998-9903-2018-20-9-10-92-100

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Studies of Possibilities of Energy Efficiency of Asyncronous Motors Improvement

Aleksey Burkov¹,

В. Н. Юрин²,

В. Р. Аветисян³

Abstract: Modern society is inseparably linked with electrical energy utilization in many areas of life and activities. Fleet and its transport infrastructure equipped with an electric equipment of various degree of complexity is not an exception. Currently, hundreds of thousands of commercial, fishing, passenger and other ships are operational and perform their functions. Technical perfection of their production mechanisms and technological processes being implemented are largely determined by the perfection of the act… Show more

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Algorithm for simulating the self-starting of a group of asynchronous electric motors with a short-circulated rotor

Galeeva

Kuksov²

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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PURPOSE. To consider the problems of modeling the processes of run-out, self-starting of a group of asynchronous electric motors (AM) in case of short-term power outages (NEC) and voltage drops in external short circuits (SC), convenient for programming and practical use. To establish the integral reaction of the AM group during self-start to the disturbing effect, taking into account their characteristics and duration to establish the permissible limit values of the NEC. To develop an algorithm for the transient process of self-starting of the AM group when using matrix and vector data representation when solving the basic equation of the rotor motion and its computer implementation. METHODS. When solving the problem, the following methods were used: successive approximations when solving the basic electromechanical equation, taking into account electromagnetic transient processes; Gauss-Seidel method with accelerating the convergence of the iterative process when solving the equations of the parameters of the regime; method of nodal stresses. The algorithm is implemented in VBA and tested in Matlab Simulink. RESULTS. The article describes the relevance of the topic, considers a model of AM according to catalog data, an algorithm for self-starting a group of an AM with NEC and external short circuits, taking into account electromagnetic transient processes, which has high accuracy and is convenient for practical use. CONCLUSION. The use of asynchronous motor catalogs makes it possible not to carry out laborious preliminary calculations of the parameters of asynchronous motors. The application of the Gauss-Seidel method with acceleration of convergence provides a decrease in the number of iterations. Taking into account electromagnetic transients and the effect of displacement of the rotor current allows you to evaluate the mutual influence of motors and increase the accuracy of calculations. The use of the method of nodal voltages makes it possible to determine the residual voltage on the busbar section with AM, if at the first moment the motors are switched on to short circuit. The implementation of the algorithm in the VBA environment is convenient for practical use.

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Algorithm for simulating the self-starting of a group of asynchronous electric motors with a short-circulated rotor

Galeeva

Kuksov²

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

View full text Add to dashboard Cite

show abstract

Algorithm for simulating the self-starting of a group of asynchronous electric motors with a short-circulated rotor

Galeeva

Kuksov²

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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Load switching between main power grid to the backup grid by standard automatic transfer switch

Chervonenko

Котин

Rozhko

2022

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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PURPOSE. To develop a variant of the algorithm for the automatic input of the reserve, which consists in transferring the load in case of emergency situations, to make a simulation model in the MatLab® environment corresponding to the developed generalized electrical scheme of the system.METHODS. When solving the problem, the method of digital modeling was used, which consists in the maximum approximation of the system under study to a real object, implemented by means of MatLab.RESULTS. It is proposed to study the methods of synthesis of digital models of compensation of voltage drops by the example of a study of an automatic reserve transfer system, demonstrating an approach to modeling this system. When developing models in the MatLab environment, the parameters of real technical elements and devices and their digital analogues are taken into account. The issue of creating a digital model of an electric drive system, including a model of an asynchronous motor with a short-circuited rotor, is considered. The result, after final refinement, can be used to design a real system in production conditions.CONCLUSIONS. The developed model of the automatic transfer switch system is operable, the time indicators are satisfactory for systems that do not make excessive demands on performances and time intervals. For systems that are sensitive to current inrushes during load transfer, some improvements are required, which are reduced to the implementation of a high-speed automatic switch system. The development of this system is currently at the research stage, namely, the compilation of a load transfer logic that takes into account the phase matching of electrical circuits.

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Studies of Possibilities of Energy Efficiency of Asyncronous Motors Improvement

Cited by 5 publications

References 0 publications

Algorithm for simulating the self-starting of a group of asynchronous electric motors with a short-circulated rotor

Algorithm for simulating the self-starting of a group of asynchronous electric motors with a short-circulated rotor

Algorithm for simulating the self-starting of a group of asynchronous electric motors with a short-circulated rotor

Load switching between main power grid to the backup grid by standard automatic transfer switch

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