scholarly journals Experimental analysis of a prototype voltage stabilizer using an optoelectronic proximity voltage relay

2021 ◽  
Vol 2094 (5) ◽  
pp. 052042
Author(s):  
R Ch Karimov ◽  
N M Kurbanova ◽  
N A Musashayxova ◽  
R K Makhamadjanov ◽  
A S Togaev
Keyword(s):  
Experimental Study ◽  
Power Quality ◽  
Transient Process ◽  
Power Supply ◽  
Experimental Analysis ◽  
Experimental Studies ◽  
Voltage Stabilizer ◽  
Reliable Operation ◽  
Operating Modes ◽  
Contact Voltage

Abstract This article discusses the issues of experimental analysis of power quality indicators when using a voltage stabilizer using an optoelectronic proximity voltage relay. Where, the booster voltage stabilizer, the magnetizing windings of which are switched using non-contact voltage relays made on the basis of semiconductor devices, as well as the duration of the transient process when switching active and active-inductive loads connected to the output of the stabilizer. In addition, the article provides information regarding the performance of the developed prototype voltage stabilizer using an optoelectronic contactless voltage relay and verification of an experimental study of the operation of installations with their use. Also presented is material on the experimental study of a prototype voltage stabilizer using an optoelectronic contactless voltage relay in various operating modes. Summarizing the results of experimental studies of a prototype voltage stabilizer using an optoelectronic contactless voltage relay, it can be stated that it fully meets the requirements for such devices and can ensure reliable operation of the power supply network of household electrical consumers.

scholarly journals Analysis and study of energy efficiency by the operation of a voltage stabilizer

2021 ◽  
Vol 2094 (5) ◽  
pp. 052050
Author(s):  
R Ch Karimov ◽  
A V Kuchkarov ◽  
M Z Xodjalimova ◽  
R K Makhamadjanov ◽  
A B Numonov
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Voltage Stabilizer ◽  
Supply Network ◽  
Reliable Operation ◽  
Contact Voltage ◽  
Analysis And Study

Abstract This article discusses the analysis and study of the energy efficiency of the operation of a voltage stabilizer using a non-contact voltage relay. In addition, the calculation of the energy efficiency from the use of the stabilizer is presented on the example of the enterprise of the Baysun district power supply of the Surkhandarya region. Summarizing the results of the analyzed and investigated energy efficiency of the prototype of the stabilizer, it can be stated that it fully meets the requirements for such devices and can ensure reliable operation of the power supply network of household electrical receivers with a voltage of 0.4 kV.

Acoustic Speckle: Theory and Experimental Analysis

1979 ◽  
Vol 1 (4) ◽  
pp. 303-324 ◽  
Author(s):  
John G. Abbott ◽  
F. L. Thurstone
Keyword(s):  
Experimental Study ◽  
Experimental Analysis ◽  
Phased Array ◽  
Imaging System ◽  
Experimental Studies ◽  
Laser Speckle ◽  
Speckle Reduction ◽  
Multiple Images ◽  
Starting Point ◽  
Speckle Patterns

A theoretical and experimental study of speckle, as applied to ultrasonic imaging, is presented. The concept of laser speckle is briefly reviewed and is used as a starting point to explain the origin of acoustic speckle. The primary differences between these two phenomena are discussed and are confirmed by experiment. An experimental study of speckle reduction by summation of multiple images is also presented. Several techniques for generating independent speckle patterns for use in image summation schemes are proposed. A phased array, dynamically focused sector imaging system was used in all of the experimental studies reported.

scholarly journals On the choosing the installation location the balancing devices in low-voltage distribution electric networks

2021 ◽  
Vol 2094 (5) ◽  
pp. 052012
Author(s):  
I V Naumov ◽  
S V Podyachikh
Keyword(s):  
Power Quality ◽  
Low Voltage ◽  
Experimental Studies ◽  
Distribution Networks ◽  
Electrical Networks ◽  
Process Change ◽  
Electric Networks ◽  
Concentrated Load ◽  
Operating Modes ◽  
Three Phase

Abstract The experimental studies result on the power quality and additional power losses analysis caused by the asymmetric modes occurrence in three-phase four-wire 0.38 kV electrical networks are considered. The operating modes 38 kV networks several types simulation – with power take-off nodes distributed along the power line, and an electric network with a concentrated load is carried out. The programs have been developed that allow to assess the change in indicators characterizing asymmetric modes, as well as programs that allow us to visualize this process change. The most installing special symmetrical devices appropriate places in electric networks with a distributed load (rural electric distribution networks) and concentrated power take-off nodes electric networks (urban electric networks) have been identified to minimize losses and improve the power quality. A numerical studied indicators analysis was performed.

scholarly journals EXPERIMENTAL STUDY AND ANALYSIS OF POWER QUALITY ON HARMONIC MEASUREMENT

2020 ◽  
Vol 8 (6) ◽  
pp. 259-262
Author(s):  
Rashmi Athiya ◽  
A.K. Sharma
Keyword(s):  
Experimental Study ◽  
Power Quality ◽  
Power Supply ◽  
Experimental Approach ◽  
Harmonic Distortion ◽  
Experimental Setup ◽  
Supply Circuit ◽  
Power Supply Circuit ◽  
Harmonic Measurement

In this paper, we are study the measurement of harmonic distortion with the help of experimental approach in which included the various equipment and loads such as Experimental setup, Indicator, A.C. power supply, circuit with transformer, switch for different loads, different loads (Filament bulb, CFL and LED).

scholarly journals Experimental studies of the effect of a hybrid inverter on power quality

2021 ◽  
Vol 1 (3) ◽  
pp. 2-9
Author(s):  
YA.E. Shklyarskiy ◽  
◽  
A.N. Skam'in ◽  
O.S. Vasil'kov ◽  
◽  
...  
Keyword(s):  
Power Quality ◽  
Alternative Energy ◽  
Electromagnetic Compatibility ◽  
Experimental Studies ◽  
Parallel Operation ◽  
Electrical Networks ◽  
Active Resistance ◽  
Operating Modes ◽  
Voltage Distortion ◽  
Harmonic Composition

The integration of alternative energy sources and various technologies of distributed generation with power electronic converters in electrical networks leads to an increase in the diversity of the network, but at the same time to the tightening of the requirements of various standards, for exam-ple, a limited harmonic composition of the generated current, continuous operation of the device with voltage distortion, etc. Taking this fact into account, the paper presents the results of experi-mental studies of the effect of a hybrid inverter on power quality indicators at the point of common connection. A laboratory bench was developed. It consists of a three-phase hybrid inverter, a stor-age battery, a linear load in the form of an active resistance and a capacitor unit. The inverter has been connected to the power supply for parallel operation to supply the load in the form of active resistance. The modes of battery charging and power delivery to the network with two variations of the system resistance were investigated. The power output from the inverter varied from 500 W to 2 kW in the mode of generating electricity to the grid, and in the range from 50 to 300 W in the bat-tery charging mode. As a result of laboratory studies, the dependences of the total harmonic current distortion (THDI) were obtained for various operating modes of the inverter and system resistances. On the basis of the obtained results, an algorithm for the selection of methods and means to ensure electromagnetic compatibility during operation of the load and a hybrid inverter with energy storage was developed. It makes it possible to reduce the effect of hybrid inverters on the voltage distortion of the supply network.

scholarly journals A REVIEW OF EXPERIMENTAL STUDY OF POWER QUALITY MONITOR ON HARMONIC MEASUREMENT

2020 ◽  
Vol 7 (6) ◽  
pp. 156-159
Author(s):  
Rashmi Athiya ◽  
Dr. A.K. Sharma
Keyword(s):  
Experimental Study ◽  
Power Quality ◽  
Power Supply ◽  
Power Supply System ◽  
Working Life ◽  
Supply System ◽  
Electrical System ◽  
Harmonic Measurement

Power Quality Monitor has an important role for utility and engineers in recent years. In this review, we are studying to remove the disturbance that produce in power supply system which is used in residential and industrial appliances. It is very necessary that reduce the harmonic the power supply system for increase the working life of electrical system equipments.

scholarly journals Analyzing the potential for using active filters to reduce voltage nonsinusoidality in the electric power supply system of a coal open-cut in Vietnam

2019 ◽  
Vol 114 ◽  
pp. 04006
Author(s):  
Bui Ngoc Hung ◽  
Lidiia I. Kovernikova
Keyword(s):  
Power Quality ◽  
Power Supply ◽  
Power Supply System ◽  
Reactive Power ◽  
Experimental Studies ◽  
Electrical Equipment ◽  
Supply System ◽  
Active Filters ◽  
Electric Power Supply ◽  
Supply Systems

Coal mining is one of the important economic sectors in Vietnam. Power supply systems of coal mines and open-cuts are complex. They have multiple levels of voltages and different types of loads. New electrical equipment usually works alongside with the equipment that is obsolete and worn-out. Power supply systems of industrial areas of Vietnam where coal is mined are characterized by the low power quality. In Vietnam the indices which characterize the distortion of both voltage and current waveforms have standard values. The article presents the findings upon the analysis of a power supply system of a coal open-cut in Vietnam and the electrical equipment of the coal sorting plant along with the results of the experimental studies of power quality indices and the non-sinusoidal mode parameters. The measurement analysis has shown that the indices of the 5-th and 7-th harmonics of voltage were over the limits. There are interharmonics in voltages and currents. The article analyzes the characteristics of active filters. It is possible to improve the power quality by using an active filter which generates both reactive power to increase the load power factor and harmonic and interharmonic currents to reduce the degree of voltage and current waveform distortion.

scholarly journals Development and experimental study of circuits of contactless device for automation of compensation of reactive power of capacitor batteries

2021 ◽  
Vol 289 ◽  
pp. 07012
Author(s):  
Maxsud K. Bobojanov ◽  
Raxmatillo Ch. Karimov ◽  
Toir H. Qosimov ◽  
Shokhin Dzh. Dzhuraev
Keyword(s):  
Experimental Study ◽  
Power Control ◽  
Power Factor ◽  
Power Supply ◽  
Reactive Power ◽  
Experimental Studies ◽  
Load Current ◽  
New Device ◽  
Capacitor Banks ◽  
Automatic Power Control

This article presents material based on the results of the analysis of literature sources on automatic devices for regulating reactive power in power supply systems. The operating mode of the compensating devices is determined taking into account the permissible voltage deviations at the terminals of the electric power receivers. Voltage, load current, reactive power directions, power factor, phase angle between the supply voltage and load current, and time can be used as control parameters. In addition, the article provides information regarding the performance of the developed circuits of contactless devices and verification of the experimental study of the operation of installations with their use. Also presented is material on the experimental study of a prototype of a contactless switching device for automatic power control of capacitor banks in various operating modes. Summarizing the results of experimental studies of a new device for automatic power control of capacitor banks, it can be stated that it fully meets the requirements for such devices and can ensure reliable operation of the power supply network with an appropriate power factor.

scholarly journals New solutions for controlled compensating devices

2021 ◽  
Vol 289 ◽  
pp. 07021
Author(s):  
Raxmatillo Ch. Karimov ◽  
Akmal Egamov ◽  
Shokhin Dzh. Dzhuraev ◽  
Bakhadir Uzakov
Keyword(s):  
Experimental Study ◽  
Power Control ◽  
Reactive Power ◽  
Experimental Studies ◽  
Measuring Device ◽  
New Device ◽  
Operating Modes ◽  
Capacitor Banks ◽  
Automatic Power Control ◽  
Compensating Devices

The article presents material, which is based on the results of the analysis of literature sources on automatic devices for regulating reactive power in power supply systems. In addition, this article provides information regarding the operability of the developed circuits of contactless devices and verification of the experimental study of the operation of installations with their use. Also presented is material about an experimental study of a contactless switching device for automatic power control of capacitor banks in various operating modes. A measuring device with programmed control “Fluke” was used to record and process experimental data of non-contact devices for regulating the power of capacitor banks. The results of experimental studies of a new device for automatic power control of capacitor banks, it can be stated that it fully meets the requirements.

Sign in / Sign up

Export Citation Format

Share Document