Measurement of the Quality of Electricity in the Power Supply System with LED Lighting Devices

2020 ◽  
Author(s):  
V. P. Kuzmenko ◽  
O. Ya. Solenaja ◽  
A. V. Rysin ◽  
S. V. Solyonyj ◽  
E. Kvas
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Led Lighting

scholarly journals Improving the quality of voltage in the system of traction power supply of direct current

2015 ◽  
Vol 35 (3) ◽  
pp. 63-70 ◽  
Author(s):  
Viktor G. Sychenko ◽  
Dmitry O. Bosiy ◽  
Eugene M. Kosarev
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Power Supply System ◽  
Heavy Traffic ◽  
Supply System ◽  
Traction Network ◽  
Traction Substations ◽  
Traction Power Supply ◽  
Traction Power

Purpose of the work is improved approaches to ensure the required quality parameters of voltage in the traction network based on modern technologies and equipment in the application of power distribution system. Actuality. The introduction of high-speed traffic, increase weight standards Train necessitates increasing the carrying capacity of railways. Often the carrying capacity of existing sections electrified at 3.0 kV DC power supply unit limits. Such limitations include voltage decrease on the electric current collector below the allowable value for the normal operation of 2700 (2900 for high-speed V) and heating the contact wires, thereby losing their mechanical strength. Existing power supply system of RS, which have considerable installed traction substations, can not provide the required level of power density traction network for high-speed movement within 1.5 - 2 MW / km and, respectively, the required voltage quality. At the same time, the daily loading of a powerful traction substations in providing intensive schedule of trains does not exceed 20-25%, while the energy loss in traction network peak load increases and reaches 10-15% of the energy consumed. Thus, the existing system of power traction networks is not sufficiently effective and economical, even with the application of existing methods to strengthen them. In our view, the main limiting factor for a given quality of voltage in the traction network is the use of centralized power. From this, the development of measures to improve the quality of voltage in the traction network in the implementation of high-speed traffic in a growing scarcity of energy resources is an urgent task. Scientific novelty. Using distributed power supply system with adjustable supply points combined into intelligent power supply, which enables adaptive change the characteristics of the transfer, conversion and consumption and optimize the mode of functioning of the traction power supply is suggested for improving the quality of voltage in the traction network in the implementation of high-speed and heavy traffic. Practical significance. Improving the quality of voltage in the traction network by using the proposed circuit design traction power supply will ensure the desired mode voltage and power characteristics of the traction network in the implementation of high-speed and heavy traffic while reducing electricity losses by 20-30%.

Math model of a power beam feeding a spacecraft under conditions of intermittent power supply

2020 ◽  
pp. 56-65
Author(s):  
Aleksey M. BEZNYAKOV ◽  
Aleksey V. NEMIROV ◽  
Gennadiy B. STEGANOV
Keyword(s):  
Power Consumption ◽  
Power Supply ◽  
Power Plants ◽  
Power Supply System ◽  
Supply System ◽  
Solar Array ◽  
Math Model ◽  
Operational Conditions ◽  
Supply Systems

The paper discusses transmission, reception, conversion and consumption of energy of laser and microwave radiation from Earth or space power plants. It proposes a classification of advanced systems for remote supply of power to spacecraft (SC). It addresses practicability of using remote power supply to SC under various operational conditions. The paper formulates the problem of evaluating the capability of the existing SC power supply systems to receive and convert emissions from additional sources. An analysis of criteria for the quality of pulsed or rapidly varying flow of energy into a SC power supply system. It reviews the structures of typical channels of power consumption in a SC power supply system. An equivalent circuit replacing receivers of pulsed or rapidly changing radiation is described. A math model is proposed for a power consumption channel operating under conditions of intermittent power supply to photovoltaic converters. Math modeling results are presented and analyzed. Key words: space power plant, solar array, onboard power supply system, power consumption channel, voltage converters.

scholarly journals Short-term forecasting of wind and solar power generation

2021 ◽  
Vol 2131 (5) ◽  
pp. 052050
Author(s):  
V Z Manusov ◽  
S K Khaldarov ◽  
B V Palagushkin
Keyword(s):  
Solar Radiation ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Wind Flow ◽  
Effective Implementation ◽  
Flow Speeds ◽  
Time Of Year ◽  
Short Term Forecasting

Abstract It is important to note that the generated power of renewable sources depends on the natural conditions at a particular geographic point, the level of wind flow speeds and solar radiation. The patterns characterizing these parameters depend on the time of year, locality and are purely probabilistic in nature. Taking into account the above-mentioned conditions for the effective implementation of “green” objects in the power supply system, the purpose of this work is to build forecasting models that are more likely to be able to determine what part of the load can be covered by the power supply system based on wind power and solar installations. This purpose was achieved by constructing and training artificial neural networks with data on the speed of wind flow and solar radiation obtained from real renewable energy facilities. The most significant result is the identification of the necessary forecasting horizon, taking into account the preservation of a relatively good quality of metrics, as well as understanding what additional data is required to improve this quality. The significance of the results obtained lies in the fact that they make it possible to determine what reserve capacity is required to be included in the project.

scholarly journals Influence of failures of overhead lines on reliability of autonomous power supply system

2018 ◽  
Vol 69 ◽  
pp. 02015
Author(s):  
Dmitriy Karamov ◽  
Sergey Perzhabinsky
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Overhead Lines ◽  
Power Stations ◽  
Random States ◽  
The Given ◽  
Term Data

We research influence of failures of overhead lines on reliability of autonomous power supply system with distributed generation in the given article. Simulation of failures of overhead lines are done on the base of long-term data of exploitation distributing electricity networks. Considered autonomous power supply system consists of wind and solar power stations. Diesel generators are emergency sources of electricity in the system. For adequacy estimation of electricity supply we many times simulated and analyzed of random states of autonomous power supply system. Results of experimental research confirm that detailed accounting of statistics of real failures of overhead lines increases of quality of reliability analysis.

scholarly journals Specificity of energetic functioning of economic activity objects

2018 ◽  
Vol 44 ◽  
pp. 00010 ◽  
Author(s):  
Karol Bednarek ◽  
Artur Bugala ◽  
Dorota Typanska ◽  
Leszek Kasprzyk
Keyword(s):  
Energy Management ◽  
Power Supply ◽  
Power Supply System ◽  
Negative Impact ◽  
Electrical Equipment ◽  
Supply System ◽  
Higher Harmonics ◽  
Supply Networks ◽  
Electromagnetic Disturbances

Ecology is strongly related to the quality of energy management and to limiting the negative impact of the technosphere on the environment. This work refers to the analysis of energy quality and power balances in different, due to the specificity of functioning (used electrical equipment), business facilities. The research was carried out for supply networks: in the bank building, in the IT laboratory and in the office and warehouse facility. The measurements of currents, voltages, active, reactive and apparent power in individual phases of power supply system as well as distortions (higher harmonics) of currents and voltages were carried out. The research was carried out to identify irregularities in the networks and to indicate ways to limit the effects of electromagnetic disturbances (mainly higher harmonics) as well as achieve improvements in energy efficiency and ecology in the operation of these facilities.

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.

scholarly journals Quality of electricity in power supply of non-traction consumers of railway transport

2021 ◽  
Vol 34 (06) ◽  
pp. 1714-1719
Author(s):  
Denis N. Morgunov ◽  
Leonid S. Labunsky
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Load Factor ◽  
Railway Transport ◽  
Current Harmonics ◽  
Emergency Situations ◽  
Electronic Load

The article presents the results of the study of the influence of LED lamps with switching power supplies containing power factor correctors on the quality of electricity in the power supply system of non-traction consumers of railway transport. It is noted that the emission of harmonic components of current by electronic loads can cause deviations in the quality of electricity up to the occurrence of emergency situations due to overloads of low (0.4 kV) and medium (6/10 kV) voltage networks. A non-linear electronic load (LED lamp), although equipped with a power factor corrector, causes the generation of a significant level of current harmonics, which significantly affect the operation of the transformer. As a result, the transformer, calculated taking into account the load factor of 0.7 – 0.8, can not be normally operated in the conditions of using electronic load devices. Mathematical modeling of the correction of the modes of the power supply system with nonlinear single-phase loads is performed, provided that the correction devices made on the basis of several condensers and reactors with nonlinear characteristics are used to balance the modes.

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