Place Selection of Sectionalizing Units in 0.38 kV Power Networks

2021 ◽  
Vol 10 (4) ◽  
pp. 35-52
Author(s):  
Alina Vinogradova ◽  
Alexander Vinogradov ◽  
Alexey N. Vasilyev ◽  
Alexey Dorokhov ◽  
Vadim Bolshev ◽  
...  
Keyword(s):  
Cross Section ◽  
Calculated Data ◽  
Power Line ◽  
Maximum Distance ◽  
Power Lines ◽  
Power Networks ◽  
Protective Devices ◽  
The Cross ◽  
Selection Of

In the paper there is the developed methodology for selecting the installation places and number of sectionalizing units which allows solving the problem according to the criterion of providing the necessary sensitivity of the protective devices installed on the line input. The obtained expression allows calculating the maximum distance to the installation place of a sectionalizing unit. It also allows determining the need to install a sectionalizing unit in a power line. If a sectionalizing unit is installed to protect an outgoing line, the technique can also be used taking into account the adjustment of the original calculated data. The developed methodology for determining the installation place of a sectionalizing unit can be used for other purposes. For example, it allows selecting the cross section of power lines in terms of the protection sensitivity when designing power lines or when reconstructing them.

scholarly journals Selection of the cross-section design for the LHC main dipole

2000 ◽  
Vol 10 (1) ◽  
pp. 65-68 ◽  
Author(s):  
P. Fessia ◽  
D. Perini ◽  
S. Russenschuk ◽  
C. Voellinger ◽  
R. Vuillermet ◽  
...  
Keyword(s):  
Cross Section ◽  
Section Design ◽  
The Cross ◽  
Selection Of

scholarly journals Increasing the Sensitivity of Protections in Electrical Networks up to 1 kV by Using Microprocessor and Semiconductor Release Tripping Devices

2021 ◽  
Vol 64 (5) ◽  
pp. 393-407
Author(s):  
A. Yu. Kapustsinski ◽  
S. N. Kаnstantsinava
Keyword(s):  
Comparative Analysis ◽  
Electric Power ◽  
Cross Section ◽  
Electrical Networks ◽  
Circuit Breakers ◽  
Electric Networks ◽  
Positive Effects ◽  
Protective Devices ◽  
The Cross ◽  
Negative Phenomena

The paper deals with the problem of increasing the efficiency of the functioning of electric networks up to 1 kV, namely, the possibility of increasing the sensitivity of protections in networks up to 1 kV, which helps to reduce the protection response currents and, accordingly, reduce the cross-section of cable and wire products. The topicality of this problem is shown and the research tasks are defined. Much attention is paid to the concept of selectivity; attention is also paid to the concepts of full and partial selectivity. “Which protective devices can be considered selective?” is a question that is considered and worked out in sufficient depth in the paper. The negative phenomena that occur when ensuring the selectivity of protections in networks up to 1 kV are systematized and described in detail. Based on a comparative analysis of the parameters of circuit breakers with release tripping devices of various types, a solution to this problem is proposed by using circuit breakers with microprocessor and semiconductor release tripping devices. Additional advantages of microprocessor-based circuit breakers are considered and indicated, as well as their disadvantages are indicated, too. The main expected positive effects from the use of circuit breakers with microprocessor release tripping devices are listed, taking into account the fact that this type of circuit breakers is considered as a complex of devices replaced by it. The article can be recommended to employees of electric power specialties working with networks up to 1 kV.

scholarly journals Numerical Calculation of Overhead Power Lines Dynamics

2016 ◽  
Vol 66 (2) ◽  
pp. 13-22
Author(s):  
Roman Gogola ◽  
Justín Murín ◽  
Juraj Hrabovský
Keyword(s):  
Cross Section ◽  
Transient Analysis ◽  
Power Line ◽  
Power Lines ◽  
Mechanical Forces ◽  
Cfd Simulations ◽  
Maximal Displacement ◽  
Line Cross ◽  
Overhead Power Lines ◽  
Wind Induced Vibration

Abstract This paper contains results of transient analysis of airflow around the ACSR power line cross-section in unsymmetric multi-span. The forces applied to the power line are obtained from CFD simulations, where the wind induced vibration is studied. Effect of these forces to the maximal displacement of the power line and the maximal mechanical forces in the points of attachment are studied and evaluated.

scholarly journals Operational problems of 2+1 bypass road sections

2016 ◽  
Vol 38 (2) ◽  
pp. 79-89 ◽  
Author(s):  
Marian Tracz ◽  
Mariusz Kieć
Keyword(s):  
Cross Section ◽  
Road Safety ◽  
Final Part ◽  
Traffic Performance ◽  
Operation Stage ◽  
Trunk Road ◽  
The Cross ◽  
Traffic Operation ◽  
Selection Of

The paper presents several problems of designing trunk-road bypasses of towns, which can be very helpful in improving their traffic performance. Such roads perform supplementary functions to the operation of network of motorways and express-roads constructed in Poland over the last decade. These problems include: selection of the cross section, selection and design of intersections and interchanges on bypasses, safety and traffic operation problems. The authors highlight the advantages of bypasses and point out some errors, which can be seen in the operation stage, basing on research and observation of 8 bypasses. In the paper traffic operation and road safety analyses for Zyrardow bypass are presented. The final part of the paper gives conclusions and recommendations for 2+1 bypass use and design.

scholarly journals INFLUENCE OF WARM ROLLING AND RECRYSTALLIZATION ANNEALING ON MECHANICAL AND METALLOGRAPHIC PROPERTIES OF THE SUPERALLOY N07080

2021 ◽  
Vol 9 (10) ◽  
pp. 680-689
Author(s):  
Omer Beganovic ◽  
◽  
Belma Fakic ◽  
Branka Muminovic ◽  
◽  
...  
Keyword(s):  
Grain Size ◽  
Cross Section ◽  
Warm Rolling ◽  
Recrystallization Temperature ◽  
Recrystallization Annealing ◽  
Warm Deformation ◽  
Partial Recrystallization ◽  
The Cross ◽  
Selection Of

Additional strengthening of superalloy N07080 described in this work was achieved by warm rolling. Control of the ratio of strength and ductile properties of the superalloy is possible by appropriate selection of the amount of warm deformation and the appropriate selection of the partial recrystallization temperature. In addition, recrystallization annealing makes it possible to equalize the grain size across the cross section of the warm rolled bars, which before recrystallization differ significantly in size in the central and peripheral parts of the bars.

Selection of the Cross Section for a Composite T-Beam

1957 ◽  
Vol 83 (4) ◽  
Author(s):  
R. S. Fountain ◽  
I. M. Viest
Keyword(s):  
Cross Section ◽  
The Cross ◽  
T Beam ◽  
Selection Of
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