-
Date submitted1978-08-27
-
Date accepted1978-10-09
-
Date published1979-02-01
Evaluation of voltage quality in distribution networks of potash mines
Improving the efficiency of potash mines is associated with the improvement of all parts of the technological process of potash ore mining and, first of all, with the provision of uninterrupted and reliable operation of mining and transportation machines, the stable and highly productive operation of which depends on the quality of electrical energy in the lifting distribution network ...
-
Date submitted1978-08-23
-
Date accepted1978-10-09
-
Date published1979-02-01
Experience of industrial operation of CPC in 6 kV distribution networks of potash mines
The low quality of voltage in the centers of supply of loads of mining sites during normal operation of the distribution network required regime measures to improve it ...
-
Date submitted1978-08-30
-
Date accepted1978-10-17
-
Date published1979-02-01
Calculation methodology of distribution networks of mining enterprises with compensating devices for voltage and reactive power losses
- Authors:
- O. V. Ivanov
- E. M. Proskuryakov
- L. N. Smirnova
The distribution network of potash mines is characterized by a large length and energy intensity. Therefore, the voltage value in remote parts of the network often reaches unacceptable values according to GOST ...
-
Date submitted1978-08-21
-
Date accepted1978-10-29
-
Date published1979-02-01
Methodology of calculation of modes of CPC with thyristor arrester at short circuits in distribution networks 6 kV
- Authors:
- O. V. Ivanov
- S. A. Maksimov
- E. M. Proskuryakov
Protection of longitudinal compensation units of CPC from overvoltages at short-circuits in the network of 6 kV can be implemented by means of thyristor arrester, included in parallel to capacitors of CPC ...
-
Date submitted1978-08-16
-
Date accepted1978-10-05
-
Date published1979-02-01
Approximate method of calculation of operating modes with nonlinear inductive shunt element
- Authors:
- V. G. Bauman
- V. M. Kvyatkovsky
- S. A. Maksimov
A nonlinear inductive shunt can be used to protect the longitudinal-capacitive compensation units: CPCs from overvoltages when the current in the circuit increases. Strict calculation of network operation modes with the installation of longitudinal CPC compensation in this case is quite a difficult task ...
-
Date submitted1978-08-15
-
Date accepted1978-10-25
-
Date published1979-02-01
Peculiarities of longitudinal and transverse compensation of voltage and reactive power losses in mine distribution networks
Distribution networks of potash mines are characterized by a large length of outgoing cable lines b kV and high power of consumers, which causes voltage deviations at the terminals of electrical consumers over 10% ...
-
Date submitted1978-08-28
-
Date accepted1978-10-18
-
Date published1979-02-01
Analysis of mine distribution networks with longitudinal-transverse compensation
Keeping in mind the feasibility of longitudinal and transverse compensation in underground networks of potash mines, we will analyze the modes of operation of the mine distribution network, typical for the production association "Beloruskali" ...
-
Date submitted1978-08-04
-
Date accepted1978-10-17
-
Date published1979-02-01
Higher harmonics in CPC with nonlinear inductive shunt element
- Authors:
- V. G. Bauman
- V. M. Kvyatkovsky
- S. A. Maksimov
Installations of longitudinal-capacitive compensation CPC for prevention of undesirable modes sometimes it is expedient to shunt by inductive nonlinear element ...
-
Date submitted1978-08-23
-
Date accepted1978-10-01
-
Date published1979-02-01
Influence of inductance of thyristor arrester power circuit on short-circuit CPC modes
- Authors:
- S. A. Maksimov
The inductance of the power circuit of the thyristor arrester, necessary for limiting the rate of rise of the direct current of thyristors, is very small and when calculating the modes of the installation of longitudinal compensation CPC is not necessarily taken into account ...
-
Date submitted1978-08-16
-
Date accepted1978-10-14
-
Date published1979-02-01
Formation on a physical model of loads statistically equivalent to real ones
- Authors:
- B. P. Konovalov
In the long distribution network of potash mine voltage loss reaches 10-15%, worsens the work of electric drives of mining and transportation machines in remote mining areas. Improving the quality of electrical energy in the mine network involves the use of various compensating devices for voltage and reactive power losses ...
-
Date submitted1978-08-07
-
Date accepted1978-10-04
-
Date published1979-02-01
Laboratory installation for reactive power regulation
- Authors:
- N. V. Nefedova
It is possible to reduce voltage and active power losses in the mine distribution network by simultaneous inclusion of longitudinal capacitive compensation units for voltage losses and unregulated reactive power sources ...
-
Date submitted1978-08-19
-
Date accepted1978-10-08
-
Date published1979-02-01
Electro-optical galvanic isolation device in voltage regulator circuits
- Authors:
- K. A. Ananyev
- S. A. Konovalova
- N. V. Nefedova
Currently existing thyristor circuits having galvanic connection with the power part have a number of disadvantages: possibility of undesirable unlocking of thyristors, appearance of feedback, connection of low-voltage and high-voltage circuits ...
-
Date submitted1978-08-12
-
Date accepted1978-10-26
-
Date published1979-02-01
Complete protection of transformer substations of quarries against phase-to-ground faults
- Authors:
- V. P. Gansky
- N. K. Smirnov
Frequent operational switching in quarry distribution networks with voltage 6-10 kV change their parameters in a wide range. This causes possible changes in the magnitudes of earth fault currents for individual feeders and for the whole substation, as a whole ...
-
Date submitted1978-08-05
-
Date accepted1978-10-18
-
Date published1979-02-01
Calculation of mine traction substations with pulse thyristor converters
- Authors:
- E. V. Bannikov
- V. P. Stepanenko
- L. A. Chubarov
One of directions of optimization of parameters of traction power supply and creation of modern systems of mine trains auto-driving are pulse thyristor converters ...
-
Date submitted1978-08-17
-
Date accepted1978-10-11
-
Date published1979-02-01
Comparison of mine contact electric locomotives auto-driving systems
- Authors:
- E. V. Bannikov
- V. P. Stepanenko
- L. A. Chubarov
The way of autodriving of contact electric locomotives without drivers is determined by the place of placing the devices regulating the voltage of traction motors and, consequently, by the speed of locomotive train movement.
-
Date submitted1978-08-10
-
Date accepted1978-10-29
-
Date published1979-02-01
Perspectivity of CPT3-I equipment for mine electric locomotives
- Authors:
- E. V. Bannikov
- V. P. Stepanenko
Systems of mine contact electric locomotives auto-driving are developed mainly in two directions: application of electric locomotives with thyristor control system of traction motors; use of existing rolling stock with change of traction network parameters by means of thyristor rectifiers installed at traction substations ...
-
Date submitted1978-08-30
-
Date accepted1978-10-24
-
Date published1979-02-01
Criteria of mine electric locomotive control during train moving from a place
- Authors:
- V. N. Kordakov
One of the stages of train starting is its moving from the place, defined from the moment of the electric locomotive starting to the moment of the last carriage starting to move. This stage is characterized by insignificant transient time (1-5 s) and large dynamic loads arising in the coupling devices of the cars. These loads are 3-10 or more times higher than the hourly value of the electric locomotive tractive force ...
-
Date submitted1978-08-27
-
Date accepted1978-10-01
-
Date published1979-02-01
Determination of traction motors compounding degree at starting modes of mine automated electric locomotive operation
- Authors:
- V. N. Kordakov
- M. U. Eneev
When compound traction motors are used on mine electric locomotive transportation, one of the essential issues is the choice of compounding system. This issue is especially acute when modernizing existing traction motors designed for automated electric locomotive rolling, when there is a need to automate the starting modes of the electric locomotive ...
-
Date submitted1978-08-15
-
Date accepted1978-10-24
-
Date published1979-02-01
Ways to increase train traffic safety at automation of electric locomotive pulling
- Authors:
- O. B. Lakota
- V. N. Kordakov
One of the directions of improvement of mine electric locomotive rolling is its automation, which provides rhythmicity of trains movement, increase of operation safety and productivity of transport ...
-
Date submitted1978-08-26
-
Date accepted1978-10-27
-
Date published1979-02-01
Automated mine electric locomotive
- Authors:
- B. G. Aniskin
The development of the mining industry requires solving the issues of mechanization of all production processes, including mine transport.Currently, electric locomotive transport is used to deliver ore along the main pumping workings. In connection with the growth of ore production volumes and the increasing importance of pumping, the solution of problems of increasing labor productivity and reducing the cost of ore is possible in several directions - increasing weight standards, speeds of transport automation, etc. ...
-
Date submitted1978-08-22
-
Date accepted1978-10-01
-
Date published1979-02-01
Subordinate vector control of induction motor by rotor slip parameter
- Authors:
- V. A. Dartau
The original scheme of the control system, designed, according to the authors of this scheme, to control the torque of the induction motor, unfortunately, has inaccuracies admitted in the calculations. This has led to an unwarranted conclusion about the effectiveness of this control system ...
-
Date submitted1978-08-04
-
Date accepted1978-10-14
-
Date published1979-02-01
Control by the principle of subordinate regulation of electric drive with double-fed asynchronous machine
- Authors:
- V. A. Dartau
The use of alternating current machines in the drive, fed from the stator side and from the rotor side, allows you to expand the range of regulation of the rotor speed of the machine. An ordinary asynchronous motor with a phase rotor can serve as an executing machine. In this case, let us call it a dual-powered TIR machine ...
-
Date submitted1978-08-12
-
Date accepted1978-10-05
-
Date published1979-02-01
Asynchronous machine equations for synthesis of frequency control systems
- Authors:
- I. M. Stolyarov
- T. O. Rosso
Asynchronous motor with squirrel cage rotor - structurally the simplest electrical machine, which has caused a fairly widespread use of this motor in the drive of mining machines. However, the dynamic modes of these machines are not sufficiently studied ...
-
Date submitted1978-08-16
-
Date accepted1978-10-15
-
Date published1979-02-01
Control units of thyristor frequency converter in vector control system
Power thyristor inverter control unit BUI must provide control of the frequency and phase of the output voltage of the autonomous inverter thyristor frequency converter THR using two input three-phase voltage systems. For this purpose, at the output of the unit, must be formed long pulses of control of the inverter thyristors, necessary for a stable and reliable start of the drive ...
-
Date submitted1978-08-16
-
Date accepted1978-10-29
-
Date published1979-02-01
Application of analytical self-tuning circuits in electric drives with sequential correction
- Authors:
- A. S. Soloviev
- N. A. Ambartsumyan
The ideal is such a system of automatic control of ACS of electric drives, which works commands without errors. It is impossible to obtain such a system practically, it can only be aspired to …