scholarly journals Modified aluminum alloys of Al – Zr system for power transmission lines of Uzbekistan

2020 ◽  
pp. 51-55
Author(s):  
Yu. N. Mansurov ◽  
J. U. Rakhmonov ◽  
A. A. Aksyonov
Keyword(s):  
Electrical Conductivity ◽  
Transmission Lines ◽  
Electricity Generation ◽  
Power Transmission ◽  
Weight Ratio ◽  
High Strength ◽  
Energy Sector ◽  
Power Lines ◽  
Al Alloy ◽  
High Electrical Conductivity

The energy sector of Uzbekistan has undergone significant changes in recent years. To diversify the electricity generation sources of the country, it is planned to bring atomic energy sector to the country and further expand more traditional energy production sources, such as wind, solar and other mixed sources. The effectiveness of electricity generation sources is determined by the consumers as well as by the quality and the number of ways to transfer the generated electricity from the source to the consumer. The power lines are considered as an effective tool for transmitting the electricity all around the globe. The main conductive part of the power lines is composed of steel wires that possess a combination of high electrical conductivity and sufficiently high strength. However, the development of new materials with increased conductivity and preferable strength-to-weight ratio compared to steels is an urgent task. The aluminium, owing to its higher electrical conductivity than that of steel, can be alternative material, even though the strength of aluminium and its alloys is noticeably inferior to those of steel. In addition, the Al alloys are widely used in the electrical industry, particularly, cable industry, due to their low density, low melting point, high corrosion resistance and good mechanical properties. The aim of this work is to develop Al-based alloy with high electrical conductivity and enough level of strength for use as a material to produce power lines. The work established the possibility of producing the ingots from Al alloy containing Zr in industrial scale, and then, through subsequent processing of the ingots, obtaining a wire having a combination of preferable strength and electrical conductivity that meet the requirements of the energy sector of Uzbekistan. Mass production of wire for power lines requires significant adjustment and control of the modes of melting and casting of ingots compared to conventional alloys.

HITENSO 1622

Alloy Digest ◽  
1968 ◽  
Vol 17 (7) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Low Temperature ◽  
Physical Properties ◽  
Transmission Lines ◽  
Abrasion Resistance ◽  
High Strength ◽  
Heat Treating ◽  
Electrical Equipment ◽  
High Electrical Conductivity

Abstract Hitenso-1622 is a copper-cadmium alloy characterized by high strength, abrasion resistance and relatively high electrical conductivity. (Formerly known as Hitenso BB-961). It is recommended for electrical equipment, trolley wire, low temperature transmission lines and relays. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-189. Producer or source: Anaconda American Brass Company.

SWISSMETAL C97 AND C98

Alloy Digest ◽  
2008 ◽  
Vol 57 (10) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
High Strength ◽  
Heat Treating ◽  
High Electrical Conductivity ◽  
Industrial Products

Abstract Swissmetal alloys C97 and C98 attain high strength by aging after cold working. The alloys are free machining and maintain a high electrical conductivity. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CU-759. Producer or source: Avins Industrial Products.

UNS A96101

Alloy Digest ◽  
1988 ◽  
Vol 37 (3) ◽  
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
High Strength ◽  
Heat Treating ◽  
High Electrical Conductivity ◽  
Treated Condition ◽  
Heat Treated ◽  
Heat Treated Condition

Abstract UNS NO. A96101 in the heat treated condition is used primarily for enclosed bus conductor where both high strength and high electrical conductivity are desirable. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-287. Producer or source: Various aluminum companies.

A high strength and high electrical conductivity CuCrZr alloy prepared by aging and subsequent cryorolling

Vacuum ◽  
2021 ◽  
pp. 110315
Author(s):  
G.Y. Li ◽  
S.Y. Li ◽  
L. Li ◽  
D.T. Zhang ◽  
J.D. Wang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
High Strength ◽  
High Electrical Conductivity

scholarly journals Calculation of thermal field and ampacity of overhead power transmission lines using finite element method

2014 ◽  
Vol 17 (1) ◽  
pp. 16-29
Author(s):  
Long Van Hoang Vo ◽  
Tu Phan Vu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Lines ◽  
Power Transmission Lines ◽  
Thermal Fields ◽  
Overhead Power Transmission Lines ◽  
Transmission And Distribution ◽  
Element Method

The population explosion and development of the national economy are two main causes of increasing the power demand. Besides, the Distributed Generations (DG) connected with the power transmission and distribution networks increase the transmission power on the existing lines as well. In general, for solving this problem, power utilities have to install some new power transmission and distribution lines. However, in some cases, the install of new power lines can strongly effect to the environment and even the economic efficiency is low. Nowadays, the problem considered by scientists, researchers and engineers is how to use efficiently the existing power transmission and distribution lines through calculating and monitoring their current carrying capacity at higher operation temperature, and thus the optimal use of these existing lines will bring higher efficiency to power companies. Generally, the current carrying capacity of power lines is computed based on the calculation of their thermal fields illustrated in IEEE [1], IEC [2] and CIGRE [3]. In this paper, we present the new approach that is the application of the finite element method based on Comsol Multiphysics software for modeling thermal fields of overhead power transmission lines. In particular, we investigate the influence of environmental conditions, such as wind velocity, wind direction, temperature and radiation coefficient on the typical line of ACSR. The comparisons between our numerical solutions and those obtained from IEEE have been shown the high accuracy and applicability of finite element method to compute thermal fields of overhead power transmission lines.

scholarly journals Wind: generating power and cooling the power lines

2020 ◽  
Vol 17 ◽  
pp. 105-108
Author(s):  
Marko Kaasik ◽  
Sander Mirme
Keyword(s):  
Wind Speed ◽  
Electric Power ◽  
High Voltage ◽  
Transmission Lines ◽  
Power Transmission ◽  
Mixed Forest ◽  
Wind Farms ◽  
Power Line ◽  
Power Lines ◽  
Local Wind

Abstract. The electric power that can be transmitted via high-voltage transmission lines is limited by the Joule heating of the conductors. In the case of coastal wind farms, the wind that produces power simultaneously contributes to the cooling of high-voltage overhead conductors. Ideally this would allow for increased power transmission or decreased dimensions and cost of the conductor wires. In this study we investigate how well the wind speed in coastal wind farms is correlated with wind along a 75 km long 330 kW power line towards inland. It is found that correlations between wind speed in coastal wind farms at turbine height and conductor-level (10 m) are remarkably lower (R=0.39–0.64) than between wind farms at distances up to 100 km from each other (R=0.76–0.97). Dense mixed forest surrounding the power line reduces both local wind speed and the correlations with coastal higher-level wind, thus making the cooling effect less reliable.

Analysis of mathematical models of transmission lines.

2020 ◽  
Vol 23 (2) ◽  
pp. 16-19
Author(s):  
G. SHEINA ◽  
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Supply System ◽  
Power Transmission ◽  
Supply System ◽  
Power Lines ◽  
Power Transmission Lines ◽  
The Mathematical Model

This paper investigates a mathematical model of one elements of the power supply system - power transmission lines. The type of models depends on the initial simplifications, which in turn are determined by the complexity of the physics of processes. The task of improving the accuracy of modeling of emergency processes in the power system is due to the significant complexity of modern power systems and their equipment, high-speed relay protection, automation of emergency management and the introduction of higher-speed switching equipment. One of the reasons for a significant number of serious emergencies in the system is the lack of complete and reliable information for modeling modes in the design and operation of power systems. The development of a mathematical model of a three-phase power line, which provides adequate reflection of both normal and emergency processes, is relevant. The advanced mathematical model of power transmission lines allows to investigate various operational modes of electric networks. The improved mathematical model of the power transmission line reflects all the features of physical processes at state modes and transient process and provides sufficient accuracy of the results. The type of mathematical model of power transmission lines depends on the accepted simplifications, depending on the task of research. The purpose of this work is to analyze the mathematical model of the power transmission line to study the modes of operation of the power supply system, with the possibility of its application to take into account all the design features of overhead and cable power lines. The mathematical model of the power line for the study of the modes of operation of the power supply system is analyzed. It is used to take into account the design features of overhead and cable power lines, skin effect.

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