STUDY OF THE INFLUENCE OF TRANSFORMERS ON THE QUALITY OF ELECTRIC ENERGY IN THE ELECTRICAL SUPPLY SYSTEM

2020 ◽  
pp. 24-30
Author(s):  
AZAT S. KHISMATULLIN ◽  
◽  
MARAT R. SURAKOV ◽  
ELMIRA M. BASHIROVA ◽  
◽  
...  
Keyword(s):  
Electric Energy ◽  
Supply System ◽  
Electrical Supply

Research of the Reliability of the Electrical Supply System of Airports and Aerodromes Using Neural Networks

2020 ◽  
pp. 279-305
Author(s):  
Serhii Mykolaiovych Boiko ◽  
Yurii Shmelev ◽  
Viktoriia Chorna ◽  
Marina Nozhnova
Keyword(s):  
Artificial Intelligence ◽  
Neural Networks ◽  
High Precision ◽  
Supply System ◽  
Electricity Supply ◽  
Diagnostic Data ◽  
Number Of Factors ◽  
Standard Situation ◽  
Electrical Supply

The system of supplying airports and airfields is subject to high requirements for the degree of reliability. This is due to the existence of a large number of factors that affect the work of airports and airfields. In this regard, the control systems for these complexes must, as soon as possible, adopt the most optimal criteria for the reliability and quality of the solution. This complicates the structure of the electricity supply complex quite a lot and necessitates the use of modern, reliable, and high-precision technologies for the management of these complexes. One of them is artificial intelligence, which allows you to make decisions in a non-standard situation, to give recommendations to the operator to perform actions based on analysis of diagnostic data.

scholarly journals Ways to Reduce Power Losses in Mining Power Supply Lines

2019 ◽  
Vol 4 (2) ◽  
pp. 150-156
Author(s):  
N. S. Antsiferov
Keyword(s):  
Electric Power ◽  
Power Supply ◽  
Power Plants ◽  
Power Supply System ◽  
Electric Energy ◽  
Supply System ◽  
Voltage Unbalance ◽  
Unbalanced Voltage ◽  
Unbalanced Load

Electric energy is the most common and universal form of energy. It can be produced in large quantities near energy sources, transmitted to large distances, easily distributed between consumers and converted into mechanical, thermal, and light energy. Ensuring reliable and economical quality electric energy supply to mining enterprises with the optimal use of energy resources is one of the most important tasks facing the country's energy sector. In the Russian Federation, high degree of concentration of generating capacities at power plants has been achieved. The main capacities are concentrated in power plants with installed capacity of more than 1 million kW. High importance of the electric power industry is determined by the infrastructural nature of the industry and the direct relationship between the country's economic growth and the level of its development effectiveness. One of the most pressing problems of modern electricity supply is the problem of ensuring the quality of electric energy. The main reason for the deterioration in the electricity quality is widespread non-linear loads that create non-sinusoidal currents and voltage unbalance during their operation. The voltage unbalance is most often caused by the presence of an unbalanced load. Unbalanced load currents flowing through the elements of the power supply system cause unbalanced voltage losses in them. This results in appearance of unbalanced voltages on the terminals of electric apparatus. The voltage deviations at electric apparatus overdriven phase may exceed the normally acceptable values, while the voltage deviations at electric apparatus other phases may remain within the normal limits. In addition to the deterioration of the voltage mode at electric apparatus under the unbalanced voltage conditions, the operating conditions of both the electric apparatus and all the network elements are significantly worsened, and the reliability of the electrical equipment and the power supply system as a whole decreased. The paper considers the issues of reducing the voltage losses in power supply networks by improving quality of electric power.

scholarly journals Study of the state of the issue of increasing the quality of electric energy in the power supply systems

2020 ◽  
Vol 216 ◽  
pp. 01163
Author(s):  
Raxmatillo Karimov
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Electric Energy ◽  
Supply System ◽  
Power Transformers ◽  
Load Current ◽  
Current Limiting ◽  
The Moment ◽  
Supply Systems

This article examines the importance of ensuring the quality of electricity and considers the possibility of using a system for monitoring the quality of electricity in the power supply system. Based on the results of the study, it was found that the use of contactless switching devices as switches of sections of windings of power transformers allows you to abandon current-limiting reactors and resistors. This is achieved by the fact that the switching of the windings occurs at the moment the load current passes through zero.

THE STEADY-STATE MODES OF THE COMPLEX ELECTRICAL SUPPLY SYSTEM - PUMPING STATION

2017 ◽  
Vol 25 (101) ◽  
pp. 34-43 ◽  
Author(s):  
Vladyslav, Lysiak ◽  
◽  
Myroslav, Sabat ◽  
Yurii, Shelekh
Keyword(s):  
Steady State ◽  
Supply System ◽  
Pumping Station ◽  
Electrical Supply

Research of pressure influence in the gas supply system on the energy consuption level of gas devices

2019 ◽  
Vol 6 (2) ◽  
pp. 56-63
Author(s):  
L. D. Pylypiv ◽  
І. І. Maslanych
Keyword(s):  
Natural Gas ◽  
Residential Buildings ◽  
Supply System ◽  
Normal Operation ◽  
Gas Combustion ◽  
Efficient Operation ◽  
Gas Consumption ◽  
Natural Gas Combustion ◽  
Gas Supply

There are investigated the influence of operating pressures in the gas supply system on the level of such energy indicators as efficiency, gas flow and gas overrun by gas equipment in residential buildings. There is established a relationship between the values of operating pressures in the gas supply system and the gas consumption level of household appliances. The causes of insufficient pressure in the gas networks of settlements are analyzed in the article. There is also developed an algorithm for calculating the change in the efficiency of gas appliances depending on the operational parameters of the gas network. It has been found that the most efficient operation of gas appliances is observed at an overpressure at the inlet of gas appliances of about 1200 Pa.To ensure the required quality of natural gas combustion among consumers and minimize gas consumption there are justified the following measures in the article: coordinating a domestic regulatory framework for assessing the quality of natural gas with international norms and standards; improving the preparation of gas coming from local wells before supplying it to gas distribution networks; auditing low pressure gas pipelines and reconstructing areas affected by corrosion; ensuring standard gas pressure in the network for the normal operation of domestic gas appliances; stating quality indicators of natural gas combustion by gas sales organizations.

MSHE-PWM Control of Modular Multilevel Direct Current Transmission System

2015 ◽  
Vol 9 (1) ◽  
pp. 553-559
Author(s):  
HU Xin-xin ◽  
Chen Chun-lan
Keyword(s):  
Pulse Width Modulation ◽  
Reactive Power ◽  
Balance Control ◽  
Electric Energy ◽  
Access Point ◽  
Experimental Result ◽  
Switching Frequency ◽  
Pwm Control ◽  
Harmonic Elimination

In order to optimize the electric energy quality of HVDC access point, a modular multilevel selective harmonic elimination pulse-width modulation (MSHE-PWM) method is proposed. On the basis of keeping the minimum action frequency of the power device, MSHE-PWM method can meet the requirement for accurately eliminating low-order harmonics in the output PWM waveform. Firstly, establish the basic mathematical model of MMC topology and point out the voltage balance control principle of single modules; then, analyze offline gaining principle and realization way of MSHEPWM switching angle; finally, verify MSHE-PWM control performance on the basis of MMC reactive power compensation experimental prototype. The experimental result shows that the proposed MSHE-PWM method can meet such performance indexes as low switching frequency and no lower-order harmonics, and has verified the feasibility and effectiveness thereof for optimizing the electric energy quality of HVDC access point.

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