scholarly journals Disturbances Generated by Lighting Systems with LED Lamps and the Reduction in Their Impacts

2019 ◽  
Vol 9 (22) ◽  
pp. 4894 ◽  
Author(s):  
Putz ◽  
Bednarek ◽  
Nawrowski
Keyword(s):  
Power Supply ◽  
Final Part ◽  
Test Results ◽  
Two Stage ◽  
Higher Harmonics ◽  
Led Lighting ◽  
Electrical Systems ◽  
Lighting Systems ◽  
Electromagnetic Disturbances

The paper deals with electromagnetic disturbances in the form of current higher harmonics, which are generated by LED lighting elements. It presents the problems related to the formation and impact of higher harmonics in the electrical systems of commercial facilities. The results of tests and analyses of current distortions for two different LED lamps are included, and these are in reference to the parameters set out in the normal applicable standards. A system was then proposed to improve the quality of energy in the mains of commercial facilities in the form of a two-stage power supply. Tests of the systems with the aforementioned LED lamps were conducted and commented upon after introduction of the two-stage power supply. The final part of the paper contains a summary of the obtained test results.

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.

Simulation of No-Load Voltage of Single Phase Synchronous Generator Based on ANSYS

2011 ◽  
Vol 268-270 ◽  
pp. 231-234
Author(s):  
Jing Yang ◽  
Wei Jun Wang ◽  
Yong Gang Zuo ◽  
Ping Feng ◽  
Long Bo Mao
Keyword(s):  
Magnetic Field ◽  
Power Supply ◽  
Single Phase ◽  
Synchronous Generator ◽  
Simulation Method ◽  
Design Parameters ◽  
Test Results ◽  
Load Voltage ◽  
Simulation Results

The theory and method of analyzing the no-load magnetic field of single phase synchronous generator(SPSG) is presented in this article, and the no-load voltage of SPSG is simulated based on ANSYS program. The no-load voltage simulation results of a SPSG resemble its test results, which prove the simulation method in this article is correct and effective. The simulation results can provide theoretical bases and method for engineers in optimizing the design parameters to improve the power supply quality of SPSG.

scholarly journals Improving the quality of electricity in the power supply systems of the mineral resource complex with hybrid filter-compensating devices

2021 ◽  
Vol 247 ◽  
pp. 132-140
Author(s):  
Yurii Sychev ◽  
Roman Zimin
Keyword(s):  
Mineral Resource ◽  
Mathematical Models ◽  
Power Quality ◽  
Power Supply ◽  
Active Filters ◽  
Hybrid Filter ◽  
Higher Harmonics ◽  
Compensating Devices ◽  
Supply Systems

The urgency and necessity of choosing and justifying the structures of hybrid filter-compensating devices based on series and parallel active filters to improve the quality of electricity in the power supply systems of enterprises of the mineral resource complex is shown. Mathematical models of hybrid filter compensating devices based on parallel and series active filters have been developed. Based on these mathematical models, computer simulation models of the indicated hybrid structures have been developed. The results of simulation showed the effectiveness of the correction of power quality indicators in terms of reducing the level of higher harmonics of current and voltage, as well as voltage deviations. The degree of influence of filter-compensating devices on the power quality indicators, which determine the continuity and stability of the technological process at the enterprises of the mineral resource complex, have been revealed. It has been established that a hybrid filter-compensating device based on a parallel active filter can reduce the level of higher harmonics of current and voltage by more than 90 and 70 %, respectively, and based on a series active filter, it can reduce the level of higher harmonics of voltage by more than 80 %. Based on the simulation results, the possibility of compensating for the reactive power of a hybrid structure based on parallel active and passive filters has been revealed. The possibility of integrating hybrid filter-compensating devices into more complex multifunctional electrical systems for the automated improvement of the quality of electricity is substantiated, as well as the expediency and prospects of their use in combined power supply systems based on the parallel operation of centralized and autonomous sources of distributed generation.

Energy-Saving Led Lighting System With Parallel Power Supply By Photovoltaic Modules And By Network

2020 ◽  
pp. 36-40
Author(s):  
Pavel V. Tikhonov
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Optimal Solution ◽  
Parallel Operation ◽  
Lighting System ◽  
Led Lighting ◽  
Photovoltaic Modules ◽  
Point Tracking ◽  
Lighting Systems ◽  
Power Point

The current state of LED lighting systems with parallel power supply by photovoltaic modules and central power supply network is analysed. The approach to implementation of parallel operation of LED luminaire powered by two sources of power is presented. It is simple, cheap and highly reliable as compared to the existing solutions. Based on this approach, four diagrams are developed which are applicable correspondingly to lighting applications and characteristics of photovoltaic modules and power consumers. The first and the second diagrams contain minimal quantity of transformers, but a number of operational constraints shall be taken into account when using them. The third diagram contains standard transformers and implies minimal number of various constraints, which makes it an optimal solution for the low-power lighting system being designed. The fourth diagram is expensive due to utilisation of equipment with automatic maximum power point tracking (the MPPT technology); it provides maximum possible energy efficiency of the lighting systems but the advantages of the MPPT technology apply only to high-power systems. It is preferable to use such objects where lighting is mostly required during daytime as consumers of such systems (shopping malls, underground passages, storage facilities, poultry farms, etc.). A positive aspect is increase in reliability of consumer power supply since power supply of LED luminaires will be also provided by an additional source. The proposed approach leads to reduction of power consumption for LED lighting, saving of fossil energy sources and therefore to ecologisation of the environment.

scholarly journals The Design and Comparison of Central and Distributed Light Sensored Smart LED Lighting Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Mehmet Ali Özçelik
Keyword(s):  
Cost Effective ◽  
Test Results ◽  
Electrical Measurements ◽  
Central System ◽  
Led Lighting ◽  
Illumination System ◽  
Light Sensor ◽  
Lighting Systems ◽  
Sufficient Test ◽  
Made In

There is a lack of published peer-reviewed research comparing the efficiencies of distributed versus central sensor-controlled LED lighting systems. This research proposes improving the smart illumination of a room with external fenestration using central and distributed light sensors. The optical and electrical measurements of the daylight have been made in the case where the light was not distributed evenly and not sufficient. Test results show that the proposed distributed light sensor illumination system has increased the efficiency by 28% when compared to the proposed central system. It has also been shown that the two tested systems are more cost-effective than common smart illumination systems.

Simulation of Voltage Waveform of Single Phase Synchronous Generator

2011 ◽  
Vol 268-270 ◽  
pp. 1888-1892
Author(s):  
Wei Jun Wang ◽  
Jing Yang ◽  
Ping Feng ◽  
Long Bo Mao
Keyword(s):  
Electromagnetic Field ◽  
Power Supply ◽  
Single Phase ◽  
Synchronous Generator ◽  
Design Parameters ◽  
Computation Method ◽  
Test Results ◽  
Voltage Waveform ◽  
Electric Power Supply

The electromagnetic field of a Single Phase Synchronous Generator(SPSG) with no-load and rated load is analyzed in this article, the voltage waveforms in both conditions are computed and the harmonics are analyzed. The computation results are close to the test results, which prove the computation method in this article is correct and effective. The results can provide theoretical bases and method to engineers in optimizing the design parameters and improving the electric power supply quality of SPSG.

scholarly journals Environmental issues of lighting and prospects of energysaving LED lighting systems with combined power supply

2020 ◽  
pp. 3-9
Author(s):  
Yu. V. Kolomzarov ◽  
V. P. Kostilov ◽  
V. M. Sorokin ◽  
Yu. E. Nikolaenko ◽  
I. V. Pekur ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Plants ◽  
Human Life ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Energy Sources ◽  
Light Sources ◽  
Spectral Parameters ◽  
Led Lighting ◽  
Lighting Systems

Using LED technologies to create a comfortable light environment for human life and work can help reduce electricity consumption while maintaining, and usually improving, the energy and spectral parameters of lighting systems. At the same time, LED lighting systems for residential and industrial buildings are usually powered by electricity generated mainly by thermal power plants. Such plants mostly use fossil fuels and their combustion leads to environmental pollution. The article proposes the concept of a lighting system, which allows improving the ecology by reducing the energy consumption of lighting systems through the use of renewable energy sources. The proposed operation algorithm of the system for power supply control of LED light sources allows selecting the most appropriate energy sources in real time, thus making it possible to increase the luminous efficiency of the lamp by at least 20% when using industrial element base. This design can help to move away from traditional energy storage systems (batteries), which significantly increases the service life of such systems, their reliability and environmental safety. Placing photovoltaic converters in close proximity to the consumer (on the roofs and facades of buildings) ensures a decrease in ohmic losses and creates favorable conditions for using solar energy to light residential and industrial premises with LED lamps, which can significantly increase the economic and energy efficiency of such systems.

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