SIMULATION OF THE CONTROL PROCESS ELECTRIC LOADS IN THE DISTRIBUTION NETWORK OF 0.4 KV

2021 ◽  
pp. 95-100
Author(s):  
Ю.А. Клименко ◽  
А.П. Преображенский
Keyword(s):  
Control Process ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Quality Parameters ◽  
Electrical Networks ◽  
Distribution Of Powers ◽  
Electrical Loads ◽  
Electric Loads ◽  
Required Quality

В статье рассматривается решение задачи моделирования процесса управления электрическими нагрузками для повышения качественных показателей электрической энергии в распределительных электрических сетях 0,4 кВ на основе использования адаптивной системы управления электрическими нагрузками. Проведен анализ существующих методов снижения неравномерности распределения мощностей. Алгоритм процесса управления электрическими нагрузками в распределительных электрических сетях, алгоритмы анализа распределения мощностей и напряжений по фазам сети, а также алгоритм устранения отклонений напряжения, которые могут быть использованы при разработке электрооборудования. для обеспечения необходимого качества электроэнергии. The paper considers the solution of the problem of modeling the process of controlling electrical loads to improve the quality parameters of electrical energy in distribution electrical networks of 0.4 kV based on the use of an adaptive system for controlling electrical loads. The analysis of existing methods of reducing the uneven distribution of capacities is carried out. An algorithm for the process of controlling electrical loads in distribution electrical networks, algorithms for analyzing the distribution of powers and voltages over the phases of the network, as well as an algorithm for eliminating voltage deviations, which can be used in the development of electrical equipment to ensure the required quality of electricity, have been developed.

scholarly journals Profile and contour grinding of compressor blade butts

2016 ◽  
Vol 1 (1) ◽  
pp. 15-19
Author(s):  
В. Полетаев ◽  
V. Poletaev ◽  
Е. Цветков ◽  
E. Tsvetkov
Keyword(s):  
Surface Layer ◽  
Coordinate System ◽  
Quality Parameters ◽  
Compressor Blade ◽  
Improve Performance ◽  
Compressor Blades ◽  
Part Surface ◽  
Required Quality ◽  
Blade Production

The existing technologies of production of compressor blade butts related with traditional machining methods, including broaching and milling. Application of these machining methods requires further superfinishing operations to ensure the required quality of compressor blades. The automated highly-productive grinding of blade butts is an effective method to improve performance and quality of blade production. The technologies of profile and contour grinding of blades of a rotor and a compressor stator provide an automated machining of the outer parts contour in the same coordinate system, implement machining based on 3-D models of theoretical blade surfaces, ensure the required quality parameters of the part surface layer without additional finishing operations.

scholarly journals QUALITY CONTROL PROCESS SIMULATION OF PRODUCTS MANUFACTURED TAKING INTO ACCOUNT TECHNOLOGICAL INHERITANCE

2020 ◽  
Vol 2020 (3) ◽  
pp. 47-56
Author(s):  
Vladimir Averchenkov
Keyword(s):  
Process Simulation ◽  
Parametric Optimization ◽  
Control Process ◽  
Technological Inheritance ◽  
Quality Control Process ◽  
Power Inputs ◽  
Quality Of Products ◽  
Automated Decision Making ◽  
Required Quality

There are considered scientific-methodical approaches to the formalization of methods for the formation and choice of efficient technologies ensuring a required quality of products, the decrease of labor intensity, power inputs, material capacity and cost price of their manufacturing for conditions of automated decision-making in integrated CADs. A possibility to form multivariate simulators of engineering processes and separate processing methods is shown for which there are described principles of their structural parametric optimization.

Mobile Measuring Complex for Conducting an Electric Network Survey

2020 ◽  
pp. 243-267 ◽  
Author(s):  
Alexander Vinogradov ◽  
Vadim Bolshev ◽  
Alina Vinogradova ◽  
Maxim Borodin ◽  
Alexey Bukreev ◽  
...  
Keyword(s):  
Electrical Network ◽  
Electrical Networks ◽  
Energy Audit ◽  
Power Networks ◽  
Operating Modes ◽  
Electric Transmission ◽  
Measuring Complex ◽  
Electric Transmission Line ◽  
Required Quality

An energy audit of the electrical network is required in the process of constructing new electrical networks as well as in justifying the reconstruction need of existing ones. In this chapter, the structure of a mobile measuring complex has been developed to conduct an electrical network survey without disconnecting consumers. The complex can be used to inspect 0.4 kV electrical networks and microgrids of the same voltage class and allows data collection on voltage losses and electric power losses in network elements such as a power lines (electric transmission line), and power transformers. The energy audit is conducted without disconnecting consumers in order to avoid an undersupply of electricity as well as to determine the real operating modes of power networks. Ultimately, the use of the developed measuring complex will increase the reliability of the power supply to consumers and ensure the required quality of the electricity supplied to them.

scholarly journals RATIONALE FOR THE REASONABILITY OF REPLACING ELECTRICAL EQUIPMENT IN SUBSTATIONS 110/35/10

2020 ◽  
Author(s):  
Ya. Ovsepian
Keyword(s):  
Cost Effectiveness ◽  
Power Supply ◽  
System Performance ◽  
Electrical Equipment ◽  
Electricity Supply ◽  
Extreme Conditions ◽  
Electrical Networks ◽  
Effectiveness Analysis ◽  
Electricity Power

To ensure the reliability and quality of the electricity supply, the utilities are required to renovate the substations, in a part of the replacement of electrical equipment. This largely determines the investment of big amounts of capital in the object, which is designed. The reliability of the power supply is ensured by suitable electrical appliances, in according to electricity power in usual and extreme conditions. Installation of electrical networks leads to higher material losses. Therefore, a detailed cost-effectiveness analysis and system performance of all electricity supplies should be checked and made during the design.

scholarly journals The required quality of electrical energy provision

2020 ◽  
Vol 22 (1) ◽  
pp. 85-92
Author(s):  
A. A. Naumov
Keyword(s):  
Operating Time ◽  
Electrical Energy ◽  
Quality Level ◽  
Successful Operation ◽  
High Quality ◽  
Foreign Countries ◽  
Manufactured Products ◽  
Quality Of Electrical Energy ◽  
Required Quality

Methods of the electrical energy (EE) with the required quality provision in conditions of limited financial opportunities in the power supplying companies (PSC) are being discussed considering the foreign countries experience. It is proposed to develop and apply tariffs differentiated by the degree of EE reliability and quality, in compliance with the EE quality required for definite consumers. As a result, both consumers and PSC may get the best of tariffs application differentiated by the quality level. Consumers with power receiving appliances not demanding the high quality of EE will gain profit from payment reduction, whereas the consumers with power receiving appliances demanding the high quality of EE – from successful operation of electrical appliances, increase of their operating time and high quality of manufactured products provision. PSC acquire incentives for EE quality management upon the consumers’ request, as well as opportunities of more efficient use of financial resources directed at different quality EE provision to the consumer.

scholarly journals Research of higher harmonic components of voltage and current and their influence on the functioning of shipboard electrical equipment

2021 ◽  
pp. 34-43
Author(s):  
В.Ф. Белей ◽  
Г.А. Решетников ◽  
К.В. Коротких
Keyword(s):  
Experimental Studies ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Electrical Network ◽  
Electric Motors ◽  
Electrical Networks ◽  
Higher Harmonic ◽  
Harmonic Components ◽  
Quality Of Electrical Energy ◽  
Asynchronous Electric Motors

Одним из направлений научно-технического прогресса на объектах морской индустрии является широкое использование технологий, основанных на нелинейных элементах, что позволяет значительно снизить их массогабаритные показатели и расшить их функциональные возможности. Однако применение таких технологий приводит к ухудшению качества электрической энергии, в первую очередь за счет высших гармонических составляющих напряжения и тока. В статье показана природа высших гармонических, выполнен анализ разделов «Правил классификации и постройки морских судов. 2021», российских и ряда зарубежных стандартов в области качества электроэнергии, регламентирующих уровень высших гармонических составляющих напряжения и тока в электрических сетях и системах. В работе приведены результаты теоретических и экспериментальных исследований влияния высших гармонических составляющих на функционирование судового электрооборудования: асинхронных электродвигателей, силовых кабелей, трансформаторов, конденсаторных батарей и систем освещения. Определены выражения, позволяющие оценить это влияние. Показано, что в основном это влияние проявляется: в дополнительном нагреве электрооборудования за счет поверхностного эффекта; вибрации асинхронных электродвигателей при высоких значениях 5 и 7 гармоник напряжения судовой электрической сети. One of the areas of scientific and technological progress at the facilities of the marine industry is the widespread use of technologies based on nonlinear elements, which can significantly reduce their weight-size parameters and dimensions and expand their functional capabilities. However, the use of such technologies leads to a deterioration in the quality of electrical energy, primarily due to higher harmonic components of voltage and current. The article shows the nature of higher harmonics, analyzes the sections of the «Rules for the Classification and Construction of Sea-Going Vessels. 2021», Russian and a number of foreign standards in the field of electric power quality, regulating the level of higher harmonic components of voltage and current in electrical networks and systems. The paper presents the results of theoretical and experimental studies of the influence of higher harmonic components on the functioning of shipboard electrical equipment: asynchronous electric motors, power cables, transformers, capacitor banks and lighting systems. Formulas have been determined to assess this effect. It is shown that the influence is mainly manifested: in additional heating of electrical equipment due to the skin effect; vibrations of asynchronous electric motors at high values of 5th and 7th voltage harmonics of the ship's electrical network.

scholarly journals Development of an Adaptive Module for Control of Energy Supply of the Consumer in the Distributive Electrical Network 0,4 kV for Elimination of the Phase Load Unsymmetry

2020 ◽  
Vol 209 ◽  
pp. 07005
Author(s):  
Yu.A. Klimenko ◽  
A.P. Preobrazhensky
Keyword(s):  
Power Supply ◽  
Block Diagram ◽  
Control Process ◽  
Electrical Energy ◽  
Distribution Networks ◽  
Electrical Network ◽  
Electrical Networks ◽  
Control Module ◽  
Network Organizations ◽  
Adaptive Power

The paper considers the possibility of modeling the process of controlling the power supply of the consumer in the lower levels of network organizations to improve the quality indicators of electrical energy in the distribution electrical networks of 0.4 kV. The analysis of the process of control of indicators of the quality of electricity in the supply of energy to consumers. The block diagram of the adaptive power supply control module of the consumer and the algorithm of the control process are presented. A consumer power supply control module in 0.4 kV distribution networks is proposed.

scholarly journals ANALYSIS OF VOLTAGE NON-SINUSIDALITY IN POWER SUPPLY SYSTEMS WITH INDUCTION HEATING UNITS

2021 ◽  
pp. 122-133
Author(s):  
Dmitriy Yu. Rudi ◽  
Sergey V. Gorelov ◽  
Aleksandr I. Antonov ◽  
Mikhail G. Vishnyagov ◽  
Aleksandr A. Ruppel
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
Low Frequency ◽  
Electrical Energy ◽  
Electrical Network ◽  
Electrical Networks ◽  
Harmonic Voltage ◽  
Harmonic Components ◽  
Quality Of Electrical Energy

The importance of the problem of improving the quality of electrical energy grew along with the development and widespread introduction of various high-performance technological installations in production, such as arc steel-making furnaces, welding installations, induction furnaces, etc. in accordance with the requirements of the standard GOST 30804.4.7–2013 and in accordance with the measurement program. A method for processing the research results obtained during the experiment is described. All power quality indicators are processed using computer programs created in the Labview graphical programming environment. The analysis of indicators of the quality of electrical energy to the requirements of GOST 32144-2013 was carried out, according to the results of which conductive low-frequency electromagnetic interference was detected in the 0.4 kV electrical network according to the coefficient of the n-th harmonic voltage components. The obtained values ​​of the indicators of the quality of electrical energy, characterizing the coefficient of the n-th harmonic components of the voltage, confirm the need to use technical means to reduce the influence of higher harmonics on electrical networks.

Quality of ram spermatozoa separated with modified swim up method

2018 ◽  
Vol 33 (2) ◽  
pp. 62-70 ◽  
Author(s):  
A Hossain ◽  
MM Islam ◽  
F Naznin ◽  
RN Ferdousi ◽  
FY Bari ◽  
...  
Keyword(s):  
Semen Quality ◽  
Membrane Integrity ◽  
Quality Parameters ◽  
Fluid Medium ◽  
Normal Morphology ◽  
The Mean ◽  
Mass Activity ◽  
Fresh Semen ◽  
Artificial Vagina

Semen was collected from four rams, using artificial vagina and viability%, motility% and plasma membrane integrity% were measured. Fresh ejaculates (n = 32) were separated by modified swim-up separation using modified human tubal fluid medium. Four fractions of supernatant were collected at 15-minute intervals. The mean volume, mass activity, concentration, motility%, viability%, normal morphology and membrane integrity% (HOST +ve) of fresh semen were 1.0 ± 0.14, 4.1 ± 0.1 × 109 spermatozoa/ml, 85.0 ± 1.3, 89.4 ± 1.0, 85.5 ± 0.7, 84.7 ± 0.5 respectively. There was no significant (P>0.05) difference in fresh semen quality parameters between rams. The motility%, viability% and HOST +ve % of first, second, third and fourth fractions were 53.4 ± 0.5, 68.2 ± 0.3, 74.8 ± 0.3 and 65.5 ± 0.4; 55.5 ± 0.4, 66.2 ± 0.4, 74.5 ± 0.3 and 73.6 ± 0.3 and 66.7 ± 0.5, 66.8 ± 0.5, 65.2 ± 0.4 and 74.7 ± 0.5 respectively. The motility%, viability% and membrane integrity% of separated semen samples differed significantly (P<0.05) between four fractions. The mean motility% and viability% were significantly higher (P<0.05) in third fraction (74.8 ± 0.3%), whereas the mean HOST +ve% was significantly higher (P<0.05) in fourth fraction (74.7 ± 0.5). All quality parameters of separated spermatozoa were significantly (P<0.05) lower than that of fresh semen. The pregnancy rates were higher with fresh semen (71%) in comparison to that of separated sample (57%).Bangl. vet. 2016. Vol. 33, No. 2, 62-70

Construction Control As A Strategy For Improving The Quality Of Buildings And Structures

2020 ◽  
Keyword(s):  
Quality Control ◽  
Life Cycle ◽  
Construction Control ◽  
Construction Sites ◽  
Actual Problem ◽  
Construction Market ◽  
Construction Products ◽  
Underlying Causes ◽  
Required Quality

In construction production, the safety of constructing buildings and structures is achieved by ensuring the required quality as a result of systematic construction control based on the implementation of a complex of technical, economic and organizational measures at all stages of the object's life cycle. The article deals with the actual problem of improving the quality of construction products-buildings and structures in conjunction with the activities of construction control bodies. The article presents the advanced foreign and domestic experience of ensuring the quality control at the construction sites, providing for the prevention of the underlying causes of defects and increasing the interest of the contractors directly. On the basis of the analysis of the current situation with quality control at the construction market, ways to improve its efficiency by developing a unified system of technological implementation of relevant requirements for the quality of construction products, determining the rational number and business load of construction control engineers, as well as the active activities of self-regulatory organizations in this area are offered.

Sign in / Sign up

Export Citation Format

Share Document