Submit an Article
Become a reviewer
Aleksandr N. Skamyin
Aleksandr N. Skamyin
Ph.D., Associate Professor
Saint Petersburg Mining University
, Ph.D., Associate Professor
Saint Petersburg Mining University
Saint Petersburg
Russia

Articles

Editorial
  • Date submitted
    2023-07-19
  • Date accepted
    2023-07-19
  • Date published
    2023-07-19

Energy efficiency in the mineral resources and raw materials complex

Article preview

Energy efficiency and energy saving at all times and especially at the present stage of development of industry and economy have played an extremely important role. Regardless of which countries and according to what criteria they build energy development plans, energy efficiency and energy saving are always a priority. This fully applies to the mineral resources complex, in which energy consumption as a whole makes up a large share of total consumption. The resources mined in the mineral resources complex are themselves a source of energy. The energy sector is evolving in many ways. Many scientific works, the results of which are reflected in publications, confirm the relevance of research in the energy efficiency field. But the approach to individual decisions in the mineral resource industry is specific and it is worth of separate consideration. Recently, much attention has been paid to “green energy” and renewable energy sources. However, energy efficiency in the field of traditional generation and consumption remains an urgent problem and its solution is in constant development. One of the main directions for improving energy efficiency is the development of autonomous systems for the electrical and thermal power engineering. All these problems are reflected in a special volume of the Journal of the Mining Institute, the articles are divided into four sections: energy efficiency of the electric drive in the mineral resources complex (MRC); energy efficiency of industrial plants and enterprises in MRC; power quality and renewable sources in MRC; autonomous power supply systems in MRC. The presented articles contain valuable material from the scientific and practical points of view and can form the basis for further research in the energy efficiency field.

How to cite: Shklyarskiy Y.E., Skamyin A.N., Jiménez Carrizosa M. Energy efficiency in the mineral resources and raw materials complex // Journal of Mining Institute. 2023. Vol. 261. p. 323-324.
Energy industry
  • Date submitted
    2022-10-26
  • Date accepted
    2023-02-13
  • Online publication date
    2023-05-04
  • Date published
    2023-07-19

Determination of the grid impedance in power consumption modes with harmonics

Article preview

The paper investigates the harmonic impedance determination of the power supply system of a mining enterprise. This parameter is important when calculating modes with voltage distortions, since the determined parameters of harmonic currents and voltages significantly depend on its value, which allow the most accurate modeling of processes in the presence of distortions in voltage and current. The power supply system of subsurface mining is considered, which is characterized by a significant branching of the electrical network and the presence of powerful nonlinear loads leading to a decrease in the power quality at a production site. The modernization of the mining process, the integration of automated electrical drive systems, renewable energy sources, energy-saving technologies lead to an increase in the energy efficiency of production, but also to a decrease in the power quality, in particular, to an increase in the level of voltage harmonics. The problem of determining the grid harmonic impedance is solved in order to improve the quality of design and operation of power supply systems for mining enterprises, taking into account the peculiarities of their workload in the extraction of solid minerals by underground method. The paper considers the possibility of determining the grid impedance based on the measurement of non-characteristic harmonics generated by a special nonlinear load. A thyristor power controller based on phase regulation of the output voltage is considered as such a load. Simulation computer modeling and experimental studies on a laboratory test bench are used to confirm the proposed method. The recommendations for selecting load parameters and measuring device connection nodes have been developed.

How to cite: Skamyin A.N., Dobush V.S., Jopri M.H. Determination of the grid impedance in power consumption modes with harmonics // Journal of Mining Institute. 2023. Vol. 261. p. 443-454. DOI: 10.31897/PMI.2023.25
Electromechanics and mechanical engineering
  • Date submitted
    2018-12-25
  • Date accepted
    2019-03-02
  • Date published
    2019-06-25

Non-linear Electrical Load Location Identification

Article preview

The article discusses the issues of identifying the location of non-linear loads in electrical networks which makes the main contribution to the distortion of the non-sinusoidal voltage and current in the distribution network of an industrial enterprise, including mining enterprises. The existing methods for determining the location of the source of higher harmonic components in voltage and current are considered, their advantages and disadvantages are revealed. The main disadvantages of the methods used include the low accuracy and incorrectness of their use in existing enterprises. When developing a new method, the authors were faced with the task of simplicity of its use in the conditions of industrial operation of electrical equipment and the absolute correctness of the results obtained. The proposed method of identifying the source of higher harmonics is based on the variation of the parameters of the power system, in particular, the change in resistance of power transformers taking into account their transformation ratio. It is shown that by varying the transformation ratio during regulation under load, the total coefficient of the harmonic components of the voltage changes. Based on the constructed dependencies, the variation of the derivative of this function with different variations of the parameters of sources of higher harmonics is analyzed and a method is developed that allows determining the share contribution of consumers to the total harmonic component of the voltage.

How to cite: Pirog S., Shklyarskiy Y.E., Skamyin A.N. Non-linear Electrical Load Location Identification // Journal of Mining Institute. 2019. Vol. 237. p. 317. DOI: 10.31897/PMI.2019.3.317
Electromechanics and mechanical engineering
  • Date submitted
    2014-09-27
  • Date accepted
    2014-11-11
  • Date published
    2015-03-01

Electric network equivalenting in the presence of high harmonics

Article preview

The article deals with equivalenting of complex electrical networks of industrial enterprises. In the article the different methods of averaging equivalenting elements in power systems are compared, specifically, the method of moments, the equivalent section method, and the average value method. The current value of the capacitor bank as part of the electrotechnical complex of the enterprise is the main criterion for determining the equivalenting error of the electric network. The equivalenting in the presence of high harmonics in electrical networks of the enterprise is considered by applying the methods under discussion. Comparison of these equivalenting methods in the presence of high harmonics shows that the error in the calculation of capacitor bank current ranges from 3,8 to 14,7 %. In addition, the most accurate method for determining the capacitor bank overload is the method of moments.

How to cite: Navarro A.O.K., Shklyarskii Y.E., Skamin A.N. Electric network equivalenting in the presence of high harmonics // Journal of Mining Institute. 2015. Vol. 213. p. 31.
Mining machine, electrical engineering and electromechanics
  • Date submitted
    2010-07-29
  • Date accepted
    2010-09-27
  • Date published
    2011-01-01

Efficiency increasing of condenser batteries operation in mining enterprise`s electric circuits

Article preview

This work contains the method of effective reactive power compensation at the expense of high harmonics reduction. The decrease of condenser batteries overloading from the high harmonics is based on variation of condenser power depending on current and voltage spectral structure, electric network parameters and load power.

How to cite: Skamin A.N. Efficiency increasing of condenser batteries operation in mining enterprise`s electric circuits // Journal of Mining Institute. 2011. Vol. 189. p. 107-110.
Mining machine, electrical engineering and electromechanics
  • Date submitted
    2010-07-10
  • Date accepted
    2010-09-15
  • Date published
    2011-01-01

Reduction methods of high harmonics influence on the electric equipment operation

Article preview

This work contains brief analysis of high harmonics reduction methods. It is offered to make a choice between reduction methods of high harmonics influence on condenser batteries depending on factors of harmonics occurrence. Definition algorithm for the most effective method of high harmonics reduction on condenser batteries operation is created.

How to cite: Shklyarsky Y.E., Skamin A.N. Reduction methods of high harmonics influence on the electric equipment operation // Journal of Mining Institute. 2011. Vol. 189. p. 121-124.
Electric drive, power supply, automation and control of mining and oil and gas production
  • Date submitted
    2007-11-02
  • Date accepted
    2008-01-12
  • Date published
    2008-05-01

Reduction of influence of higher harmonics on work of electrical complex of mining enterprise

Article preview

This work contains one of methods reduction high harmonics in electric networks of the industrial enterprises. Considering the maintenance of inductive and capasitor elements in a network the offered way is based on changing peak-frequency characteristic of network unit. Such changing is possible connecting additional reactors which parameters are defined by deciding various problems. The offered way is more economic in comparison with filter-compensating devices.

How to cite: Shklyarskiy Y.E., Sitnikov D.A., Skam’in A.N. Reduction of influence of higher harmonics on work of electrical complex of mining enterprise // Journal of Mining Institute. 2008. Vol. 178. p. 162-165.