CONTROL ALGORITHM OF STATIC CONVERTERS IN MANUFACTURING WITH MIXED LOAD TO INCREASE ELECTROMAGNETIC COMPATIBILITY OF ELECTRICAL EQUIPMENT

2021 ◽  
pp. 19-30
Author(s):  
V.N. Krysanov ◽  
I.A. Khaichenko ◽  
V.V. Babenko ◽  
Y.V. Nefedov
Keyword(s):  
Control Algorithm ◽  
Electromagnetic Compatibility ◽  
Electrical Equipment ◽  
Static Converters ◽  
Mixed Load

scholarly journals Combined control of fans of gas cooling units electric drives

2021 ◽  
Vol 29 (3) ◽  
pp. 67-82
Author(s):  
Alexander M. Abakumov ◽  
Pavel K. Kuznetsov
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Control Algorithm ◽  
Electromagnetic Compatibility ◽  
Power Saving ◽  
Air Cooling ◽  
Electric Motors ◽  
Frequency Converters ◽  
Combined Control ◽  
Gas Cooling

The problem of the temperature control at the outlet of gas cooling units of compressor stations of main gas pipelines is discussed. To solve the problemt, a discrete or frequency control of electric motors of fans of gas air cooling devices is used. The problems of electromagnetic compatibility that arise in typical power supply systems of gas cooling installations when connecting electric motors of fans through frequency converters are noted. A combined fan motor control system is considered, in which the electric motors are divided into two groups. The electric motors of the first group are connected to the network directly, the second through frequency converters. By reducing the number of electric motors connected to the network through frequency converters, the negative impact of frequency-controlled drives on the quality of electricity is reduced and the costs of modernization projects are reduced in comparison with the option of the variant using a frequency converter for each electric motor. The energy characteristics of the combined control system are analyzed. The relations that establish the relationship between the temperature difference at the cooling unit and the power of the fan motors for various control methods are obtained. The optimal control algorithm according to the criterion of maximum power saving is proposed, which provides for the interconnected control of the number of discrete-controlled motors and the speed of frequency-controlled drives. The variants of the implementation of the optimal control algorithm are discussed. Analytical expressions for power saving on the fan motor shaft in a combined system compared with a discrete one and a method for estimating energy savings are considered. The obtained results are recommended to be used to assess the technical and economic efficiency of projects for the modernization of electrical complexes of gas cooling units.

scholarly journals Modeling the spatial distribution of magnetic fields of low frequency multiple sources

2021 ◽  
Vol 5 (2) ◽  
pp. 34-37
Author(s):  
Larysa Levchenko
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Compatibility ◽  
Three Dimensional ◽  
Low Frequency ◽  
Electrical Equipment ◽  
Technical Equipment ◽  
Multiple Sources ◽  
Matlab Package ◽  
Many Sources ◽  
The Magnetic Field

The work is show that in conditions of dense the location of electrical equipment in the premises, buildings and on territories to ensure the regulatory levels of electromagnetic compatibility of personnel and the population, it is advisable to carry out preliminary modeling of the propagation of electromagnetic fields it is advisable. Considering the insignificant shielding of the magnetic field by the equipment cases, it is advisable to carry out modeling based on the magnetic component of the electromagnetic field. The mathematical ratio of the propagation of the magnetic field of individual sources, taking into account their dipole model, has been determined. The modeling was carried out for sources of the dipole and dipole-quadrupole types. Three-dimensional models of sources with the propagation of dipole, quadrupole and dipole-quadrupole harmonics of the field are provided, using the Matlab package. Application software has been developed in the C environment, using the SQL server database, and modeling of the propagation of the magnetic field of many sources in a certain plane has been carried out. This result is show that even for electrical equipment that operates to determine the reduced magnetic field isolines experimentally very difficult. At the design stages of equipment placement, modeling is the only tool for predicting the electromagnetic environment, which determines the electromagnetic compatibility of technical equipment and the electromagnetic safety of personnel and the public.

Development of Quality Inspection System for Insulation Monitoring Device of Metal-Oxide Surge Arrester

2013 ◽  
Vol 373-375 ◽  
pp. 848-851
Author(s):  
Yuan Yang
Keyword(s):  
Metal Oxide ◽  
Evaluation System ◽  
Electromagnetic Compatibility ◽  
Quality Evaluation ◽  
Performance Test ◽  
Mechanical Performance ◽  
Electrical Equipment ◽  
Inspection System ◽  
Monitoring Device ◽  
Insulation Monitoring

Metal-oxide surge arrester (MOA) is one of the important equipment in electrical utility company, its security and stability is critical to the safe operation of electrical equipment, and the insulation monitoring device is vital for getting the running status of metal-oxide surge arrester. Technical parameters requirements of this kind of device is discusses in this paper , and furthermore, relying on the condition monitoring technology laboratory for transmission and transformation equipment of the State Grid Corporation of China, a complete set of quality evaluation system is established, of which the following functions were realized, the total current and resistive current measurement error test, communication function test, environmental adaptability test, insulation performance test, electromagnetic compatibility performance test, mechanical performance test, enclosure protection performance test etc. With the system, a powerful technical support can be provided for the quality evaluation of the device, as well as the safe and reliable operation of the arrester.

scholarly journals Electromagnetic compatibility of PLC adapters for in-home/domestic networks

2018 ◽  
Vol 69 (1) ◽  
pp. 79-84 ◽  
Author(s):  
Lukas Potisk ◽  
Jozef Hallon ◽  
Milos Orgon ◽  
Radek Fujdiak
Keyword(s):  
Information Technology ◽  
Electromagnetic Field ◽  
Electromagnetic Radiation ◽  
Electromagnetic Compatibility ◽  
Electrical Engineering ◽  
Electrical Equipment ◽  
Electrical Networks ◽  
University Of Technology ◽  
Broadband Services ◽  
Made In

Abstract The use of programable logic controllers (PLC) technology in electrical networks 230 V causes electromagnetic radiation that interferes with other electrical equipment connected to the network [1–4]. Therefore, this article describes the issues of electromagnetic compatibility (EMC) of new PLC adapters used in IP broadband services in a multi-user environment. The measurements of disturbing electromagnetic field originated in PLC adapters were made in a certified laboratory EMC (laboratory of electromagnetic compatibility) in the Institute of Electrical Engineering at Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology in Bratislava. The measured spectra of the radiated electromagnetic field will be compared with the results obtained when testing older PLC modems [5].

scholarly journals Enhancing reliability of electricity supply of city electric networks cities of Dushanbe

2021 ◽  
Vol 10 (1) ◽  
pp. 46-54
Author(s):  
Alexander Ivanovich Sidorov ◽  
Saidjon Tavarov
Keyword(s):  
Power Consumption ◽  
Control Algorithm ◽  
Electrical Equipment ◽  
Distribution Networks ◽  
Smart Power ◽  
Electric Networks ◽  
Actual Problem ◽  
Local Conditions ◽  
Electric Network ◽  
Power Metering

The article is devoted to the actual problem of how to improve the reliability of the urban electric network. Based on the statistical analysis of the breakdown of electrical equipment in urban distribution networks in Dushanbe for the periods of 2017-2018 and for the reasons of damage leading to these emergency outages, the factors that affect the distribution of damage leading to emergency outages are identified. Taking into account the identified factors, a power consumption forecasting system is proposed that takes into account the local conditions of the city of Dushanbe. it allows us to suggest a way to control the operating parameters of the electric network, thereby increasing the reliability of the city's electric network in Dushanbe based on the recommendation of power consumption standards. Implementation of the control of the proposed method for improving the reliability of power supply to the urban electric network is proposed on the basis of the functionality of modern smart electricity metering using the control algorithm. To implement the control algorithm, schematic design for receiving and transmitting information from smart power metering to the data collection centre is proposed.

scholarly journals MODIFICATION OF POWER CONTROL ALGORITHM ELECTRIC STATION

2020 ◽  
Vol 2020 (3) ◽  
pp. 90-98
Author(s):  
Adel' Kovalev ◽  
Yury Vasil'evich Kolotilov
Keyword(s):  
Power Control ◽  
Communication Systems ◽  
Control Algorithm ◽  
Power Plants ◽  
Measuring Transducer ◽  
Electrical Equipment ◽  
Current Strength ◽  
Power Control Algorithm ◽  
Electric Station ◽  
Proposed Modification

Currently, the bulk of the information necessary for the implementation of supervisory control and the controllability of electrical equipment comes from telemechanics systems. A prerequisite for the construction of new electric power facilities or for the reconstruction of old ones is the introduction of telemechanics systems. Telemechanics systems are actively developing and improving. Initially, all of them consisted of a controlled telemechanics center that monitors and controls the system, receiving and processing analog signals from analog measuring transducers via numerous direct cable communication lines. The main disadvantages of such an organization of telemechanical systems include a large amount of connecting cables, scaling difficulties and low metrological characteristics. With the advent of digital transmitters, it became possible to transmit signals from them in digital form, which reduced the number of connecting lines and simplified the scaling and fault tolerance of systems. Now with the help of one measuring transducer it is possible to measure several parameters at once. The main measured parameters of power plants include: current strength, phase voltages, AC frequency, active, reactive and apparent power. This article describes the organization of the telemechanics and communication systems of the Astrakhan TPP-2. The analysis of the existing station power control algorithm is given. A variant of its modification is proposed. An example of the implementation of the proposed modification of the algorithm is described.

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