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Date submitted2011-08-17
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Date accepted2011-10-26
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Date published2012-05-22
Voltage controlling device in electric networks of the enterprises of the raw complex
- Authors:
- B. N. Abramovich
- A. P. Shevchuk
- D. M. Tarasov
In this paper an actual problem – the controlling of voltage regime in distributed circuit of mineral raw industry with the help of for power transformers. Particular attention spare for in- vention of automatic controlling block for equipment of voltage control under the power using theory of fuzzy logic. There are the results of mathematics and computer modeling.
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Date submitted2011-08-19
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Date accepted2011-10-08
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Date published2012-05-22
Evaluation of phase relationships harmonics frequency drives
- Authors:
- Ya. E. Shklyarskii
- V. S. Dobush
In article the new approach to modelling of processes arising in the presence of the frequency electric drives is offered, offering to consider corners of shift of phases on various harmonics. Research of power characteristics of a frequency drive was spent on the basis of the spent experiment.
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Date submitted2011-08-21
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Date accepted2011-10-06
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Date published2012-05-22
Efficient formation of the complex electrical load schedule of mining plant
- Authors:
- Ya. E. Shklyarskii
- A. A. Bragin
In this article considered the rational formation of the complex electrical load schedule. Application of this method allows to achieve savings in the payment of electricity and increase the possibility of energy transfer. The effect is achieved by uniform distribution of energy consumption during the day.
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Date submitted2011-08-18
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Date accepted2011-10-08
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Date published2012-05-22
Substantiation of schemes of the electrical supply of remote areas of oil extracting
- Authors:
- D. A. Ustinov
- A. V. Turysheva
- I. G. Plotnikov
Problems of an electrical supply of objects oil extracting remote areas are considered. Application of local systems of an electrical supply with application as the energy carrier of passing oil gas is proved. The analysis of applied local system of an electrical supply is made and recommendations about its perfection are made. Results of imitating mathematical modeling of start of the synchronous generator from the storage battery are presented.
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Date submitted2011-08-24
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Date accepted2011-10-01
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Date published2012-05-22
Conveyor belts service life increasing during transportation rough material on tape conveyors
- Authors:
- Yu. D. Tarasov
- A. O. Kuzmin
New design and action principles of damping devices for load-carrying branches of the belt conveyor loading zone of rough material, providing a significant reduction in fatigue wear and abrasive belt nave been described. The calculated formula for definition of the loadings which determine the main parameters of these devices is resulted.
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Date submitted2011-08-13
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Date accepted2011-10-29
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Date published2012-05-22
Developing loading facilities with gathering-arm active action
Is resulted in the article review basic designs loading parts of mining machines, analysis of physical processes of occurring at loading of rock massive is leaded with gathering-arm, basic directions of perfection of cutting heads with coupled gathering-arm are considered, and also is offered it is basic new variant of constructive execution of executive body of нагребать part for creation gathering-arm of conation.
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Date submitted2011-08-24
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Date accepted2011-10-27
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Date published2012-05-22
Realibility increase of gas-transport systems objects with help of logical-and-probabilistic method
- Authors:
- S. P. Petrov
- A. N. Makhalin
- S. V. Baburin
This paper deals with logical-and-probabilistic method in simulating to estimate the reliability of complicated power-supply systems. It gives us information about procedure of logical-and-probabilistic method in simulating, also one example of calculating the reliability of complicated power-supply system (gas compressor station “Torzhokskaya” OJSC Gazprom). Here you can find how reliability of system itself depends on reliability of its components.
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Date submitted2011-08-05
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Date accepted2011-10-26
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Date published2012-05-22
Mechanisation of extraction of peat from undrained deposit
- Authors:
- A. V. Mikhailov
- E. A. Kremcheev
- D. O. Nagornov
In comparison with traditional methods of extraction using the offered equipment and developed technological schemes for industrial production of a peat will allows to avoid actions on drainage of developed fields; to reduce expenses for preparation and operation of a peat deposit; to prolong a season of mining activities, and in some cases to provide an opportunity of all-the-year-round operation of a deposit.
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Date submitted2011-08-10
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Date accepted2011-10-24
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Date published2012-05-22
Peculiarities of external combustion engines – Stirling engines
- Authors:
- M. D. Kuznetsov
This article discusses the peculiarities of Stirling engines. Summarized history of the creation and development. Stirling cycle is described, and its comparison with the Carnot cycle, as well as the main types of structures.
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Date submitted2011-08-15
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Date accepted2011-10-24
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Date published2012-05-22
The investigation of complex production of ferromanganese nodules during its movement by flexible traction elements
- Authors:
- I. P. Timofeev
- I. A. Korolev
The article deals with contemporary problems of the world mineral complex, reflects the main issues of relevance and prospects of integrated development of solid mineral resources of the seabed. The composition, morphology and potential reserves of iron-manganese nodules are presented, a complex of equipment for the extraction of iron-manganese nodules and power characteristics that influence the extraction process are considered. On the basis of a mathematical model, the relationship between the force and kinematic characteristics is defined. The basic equation of motion of bottom devices is derived, concluded the possibility of solving this equation by numerical methods.
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Date submitted2011-08-23
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Date accepted2011-10-19
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Date published2012-05-22
Identification of turn to turn faults in power transformers by means of the amplitude-phase analysis of negative sequence currents
- Authors:
- D. I. Ivanchenko
- O. B. Shonin
The paper is dedicated to analyzing identification of turn to turn faults by digital differential protection relay of power transformers. Reliable algorithms of finding turn to turn faults from external faults and transformer inrush are described.
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Date submitted2011-08-13
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Date accepted2011-10-04
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Date published2012-05-22
Determination basic parameters backwall electro-parogeneratora for thermal influences on prizaboynuyu area layers withvvn
- Authors:
- N. S. Gubar
A scheme of the experimental apparatus downhole electro-parogeneratora, the calculation of the basic physical and electrical parameters of the installation, basic formulas and calculation of parameters for them.
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Date submitted2011-08-14
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Date accepted2011-10-20
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Date published2012-05-22
Measurement of reactive power in electric circuits with hight harmonics
In this article electronic electricity meters are considered. Indications of various types of meters in the presence of harmonious components of voltage and a current in a circuit are estimated. The error of measurements depending on various making harmonics are compared. It has been shown that the higher harmonics essentially influence indications of various types of electricity meters of reactive energy that can lead to undesirable consequences at payment of electric energy by the consumer.
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Date submitted2011-08-29
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Date accepted2011-10-02
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Date published2012-05-22
Concerning the possibility of an effective hadfield's steel cold-work hardening in the working conditions of the lining of spherical mills
Taking a grinding of coal ball mill (type: BTM 400/800) operating without rocks as an example it is shown that a bombardment of the armour by grinding bodies made of steel 110G13L directly is capable to raise its hardness from 200 to 320HB at the depth of the cold-hardened layer up to 6,7 mm that will approximately 2 times increase its firmness to an abrasion. The time needed for the realization of an effective bombardment is 11 minutes, the period between strengthening cold – work hardenings is 25 days.
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Date submitted2011-08-23
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Date accepted2011-10-17
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Date published2012-05-22
Definition of parameters of vectors of magnetic flux in electric drives with the vector control
- Authors:
- V. V. Alekseev
- V. I. Vershinin
- B. Yu. Vasilev
Indirect and direct ways of definition of parameters of vectors of the main magnetic flux consider. Results of experimental and theoretical researches are given. It shows, that at exact measuring instruments of a electric current and an voltage, both ways are rather competitive, and in view of heavy conditions actions in oil-and-gas and a mining industry, the indirect way of definition could be counted up more preferable.
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Date submitted2011-08-09
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Date accepted2011-10-07
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Date published2012-05-22
Study start-up of synchronous drives oil and gas industry
The problems of various factors on the process of launching high-voltage synchronous motors. Possibilities of optimization of start electromechanical systems with synchronous motors. A mathematical model of the electromechanical complex, which implements various starting methods.
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Date submitted2011-08-05
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Date accepted2011-10-01
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Date published2012-05-22
Photovoltaic power plant of direct conversion for the mineral raw complexes
- Authors:
- B. N. Abramovich
- E. V. Yakovleva
Designing of photovoltaic power plant of direct conversion power of 1 kW simplifies the process of performance and direction at the mineral raw complexes. This work examine existing at present day PV cells, it is selected the more suitable for the conditions of mines, open pits and oil-producing enterprise. It is presented the structure of photovoltaic power plant.
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Date submitted2011-08-05
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Date accepted2011-10-01
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Date published2012-05-22
Overview of modern methods and technical tools of measuring peat moisture
- Authors:
- K. I. Krymskii
- O. M. Bolshunova
The most widely spread methods of measuring peat moisture are considered. Moisture-meters based on these methods and currently offered on the Russian market of the leading manufacturers are described. The main directions of further development of modern peat moisture measuring are determined.
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Date submitted2011-07-13
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Date accepted2011-09-12
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Date published2012-04-05
Automatic compensation of influence of stirring factors on measurement of coal bulk weight from the clearing face
- Authors:
- R. M. Proskuryakov
- I. N. Voityuk
- A. V. Kopteva
The radioisotope method of specific weight measurement of the controlled environment is briefly described in article. The technique of creation and the block diagram of servo astatic system of the second order is submitted with the purpose of indemnification of errors due to influence on result of measurements of casual characteristics of a stream.
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Date submitted2011-07-19
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Date accepted2011-09-12
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Date published2012-04-05
Automatic adjustment of metrology performance meter random signal transducer analyzer liquid flows
- Authors:
- R. M. Proskuryakov
- A. V. Kopteva
- I. N. Voityuk
New way of statistical pulsation measurements by radioisotope technique is described, being alternative to the existing stream control methods and allowing to improve accuracy of measurements. The basic formula fundamental for the method of calibration characteristics correction is shown.
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Date submitted2011-07-28
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Date accepted2011-09-25
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Date published2012-04-05
Design features of replacement work equipment of peat excavation laoding machine
- Authors:
- D. O. Nagornov
- E. A. Kremcheev
The article deals with design features a removable desktop equipment peat excavation, loading machine. The analysis of the structures of the working equipment of peat excavation, loading machines. Suggest ways to improve the design of the working equipment of peat excavation, loading machines.
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Date submitted2011-07-30
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Date accepted2011-09-28
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Date published2012-04-05
Way remote magnitometrichesky control of the technical condition of the main pipelines
- Authors:
- A. N. Lyubchik
Last decades maintenance of reliability of objects of oil and gas has considerably become aggravated. It is connected with considerable ageing of pipelines which almost on 45 their % them are maintained more than 20 years, and 20 % – over 30 years, besides poor quality of designing and building in a combination to the limited service life applied film insulating materials of pipes lead to appreciable decrease in an operational resource. Thus, the urgency of maintenance of reliable, accident-free and effective work of pipeline system became obvious. In offered work application remote magnetometric the control, on the basis of application magnetometric equipments is described.
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Date submitted2011-07-10
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Date accepted2011-09-08
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Date published2012-04-05
Optimization of pulse width modulation for multilevel converters of variable-frequency electric drive
- Authors:
- A. V. Kudryavtseva
- O. B. Shonin
The paper is dedicated to optimization of a pulse width modulation (PWM) in multilevel inverters with floating capacitors. Comparison of PWM techniques which satisfy the condition of a capacitor voltage balance is presented from the electromagnetic compatibility point of view for the case of a fan-loaded induction motor.
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Date submitted2011-07-07
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Date accepted2011-09-24
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Date published2012-04-05
Determination of the rate of bunker filling screw executive authority and power to cut costs
- Authors:
- E. D. Kremcheev
- A. V. Bolshunov
- D. O. Nagornov
Screw bunker executive body is designed to work on the peat deposits and can be used for the extraction of peat deposits from the drilling-out. The paper describes the design of screw bunker executive authority and proposed calculation of energy consumption for cutting.
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Date submitted2011-07-18
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Date accepted2011-09-27
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Date published2012-04-05
Application of kalman filter for digital differential protection relay of power transformers
- Authors:
- D. I. Ivanchenko
- O. B. Shonin
The paper is dedicated to analyzing the use of Kalman filtering theory for Application in digital differential protection relay of power transformers. The state variables for the fault identification and protection operation criteria are described. Comparison of operation times of differential protections, based on Kalman filtering theory and Fourier algorithm is presented.