The Economic Analysis of Large Cross-Section Conductor in ±800kV DC Project

2013 ◽  
Vol 753-755 ◽  
pp. 3194-3197
Author(s):  
Hai Ying Zhou ◽  
Chun Lei Bu ◽  
Ming Jiang
Keyword(s):  
Economic Analysis ◽  
Cross Section ◽  
Transmission Lines ◽  
Social Economic ◽  
Construction Cost ◽  
Economic Benefits ◽  
Large Cross Section ◽  
Safe Operation ◽  
Key Issues

Conductor scheme is one of most key issues in the design of the transmission lines project, and it is significant for the construction cost and safe operation of transmission lines project. It can be aslo concluded from analysis on application of existing conductor that the appropriate decrease of number of bundle conductor and increase of the conductor cross-section will reduce lines loss, which has remarkable social-economic benefits. In this paper, the economic analysis of large cross-section conductor is conducted based on ±800kV DC Project. Some useful suggestions are given.

The Economic Analysis of Large Cross-Section Conductor in UHVDC Project

2013 ◽  
Vol 753-755 ◽  
pp. 3198-3200
Author(s):  
Hai Ying Zhou ◽  
Chun Lei Bu ◽  
Ming Jiang
Keyword(s):  
Economic Analysis ◽  
Transmission Line ◽  
Cross Section ◽  
Social Economic ◽  
Construction Cost ◽  
Economic Benefits ◽  
Large Cross Section ◽  
Safe Operation ◽  
Key Issues ◽  
Line Loss

Conductor scheme is one of key issues in the design of the UHVDC transmission project, and it is significant for the construction cost and safe operation of transmission line. It can be concluded from analysis on application of existing conductor that the appropriate decrease in number of bundle conductor and increase of the conductor cross-section will reduce line loss, which has remarkable social-economic benefits. In this paper, the economic analysis of large cross-section conductor is conducted based on UHVDC Project. Some useful suggestions are given.

Estimation of Overhead Transmission Lines ACSR Combined Elastic Coefficient

2013 ◽  
Vol 639-640 ◽  
pp. 1127-1130
Author(s):  
Yong Ping Li ◽  
Yang Ni ◽  
Zhi Yi Huang ◽  
Yu Cheng Su
Keyword(s):  
Composite Material ◽  
Elastic Modulus ◽  
Cross Section ◽  
Transmission Lines ◽  
Poisson Ratio ◽  
Coated Steel ◽  
Large Cross Section ◽  
Elastic Coefficient ◽  
Mechanical Calculation ◽  
Overhead Transmission Lines

According to the characteristics of the aluminum conductors, coated-steel reinforced (ACSR), combined the feature that isotropic and continuity of the folded yarns, establish the calculated equation of the Poisson ratio of the discrete and anisotropic wires. After given the calculated equation of stiffness of large cross-section wires, we obtained the calculated equation of elastic modulus, shear modulus and Poisson ratio. These wires stiffness not only reflect the characteristics of the composite material, but also provide guidance and reference for the mechanical calculation of the wires and installation of overhead conductor and ground wires and the following equation also has certain value in mechanics calculation and lines of construction.

The Study on a New Loads Calculation Method of Multi-Arch and Extra Large Cross Section Tunnels

2011 ◽  
Vol 94-96 ◽  
pp. 1159-1165 ◽  
Author(s):  
Chong Bang Xu ◽  
Cai Chu Xia ◽  
Hua Lao Wang
Keyword(s):  
Cross Section ◽  
Calculation Method ◽  
Construction Cost ◽  
Surrounding Rock ◽  
Construction Technology ◽  
Large Cross Section ◽  
Construction Procedure ◽  
Field Situation ◽  
Temporary Support ◽  
Large Sections

Increasing numbers of tunnels adopt super large sections due to the advance of design and construction technology, but the calculation method for the loose loads of such tunnels still follows the traditional method for tunnels constructed by the method of whole face excavation. The calculated loads using such method are always lager than their actual values of super large sections tunnels, and as a result the supports for such tunnels are too conservative which lead to unnecessary construction cost. As said, a new calculation method for the loose loads of multi-arch and extra large cross section tunnels (MELCST) is proposed in this paper considering the characteristics of construction for such tunnels. The method accounts for the influences caused by the multi-step construction procedure and temporary support on tunnels. Compared with old methods, this method is more practical and close to field situation, which provides a new idea for calculating surrounding rock loose loads in MELCST. This new method is demonstrated using Luohanshan tunnel of airport-highway in Fuzhou city, China.

Overhead Transmission Conductor Low Axial Tension and the Study of Linear

2014 ◽  
Vol 644-650 ◽  
pp. 3739-3742
Author(s):  
Yong Ping Li ◽  
Zheng Yun Wang ◽  
Chang Jiang Bai
Keyword(s):  
Cross Section ◽  
Transmission Lines ◽  
Reference Value ◽  
Large Cross Section ◽  
Concentrated Load ◽  
Linear Algorithm ◽  
Low Level ◽  
Overhead Transmission Lines ◽  
Load Transmission ◽  
Axial Tension

In view of the large cross-section wire overhead transmission lines, Starting from the conductor is flexible, By studying the shortage of the existing equation, The tension of conductor is low level is determined , Under the condition of the conductor is stable, Analyzed the lead in any little effect when the concentrated load lead the actual linear and sag.The analysis of comparing with existing practices.Get a new linear algorithm of computing function when a single concentrated load.After the calculation under the action of concentrated load transmission wire line has a certain reference value.

Air exchange dynamics in the system of large cross-section blind roadways

2020 ◽  
Vol 2 ◽  
pp. 46-57
Author(s):  
S.V. Maltsev ◽  
◽  
B.P. Kazakov ◽  
A.G. Isaevich ◽  
M.A. Semin ◽  
...  
Keyword(s):  
Cross Section ◽  
Large Cross Section ◽  
Air Exchange

scholarly journals Are We Able to Print Components as Strong as Injection Molded?—Comparing the Properties of 3D Printed and Injection Molded Components Made from ABS Thermoplastic

2021 ◽  
Vol 11 (15) ◽  
pp. 6946
Author(s):  
Bartłomiej Podsiadły ◽  
Andrzej Skalski ◽  
Wiktor Rozpiórski ◽  
Marcin Słoma
Keyword(s):  
Tensile Strength ◽  
Injection Molding ◽  
Mechanical Strength ◽  
Cross Section ◽  
Fused Deposition Modeling ◽  
High Strength ◽  
Large Cross Section ◽  
Fused Deposition ◽  
Injection Molded ◽  
The Cross

In this paper, we are focusing on comparing results obtained for polymer elements manufactured with injection molding and additive manufacturing techniques. The analysis was performed for fused deposition modeling (FDM) and single screw injection molding with regards to the standards used in thermoplastics processing technology. We argue that the cross-section structure of the sample obtained via FDM is the key factor in the fabrication of high-strength components and that the dimensions of the samples have a strong influence on the mechanical properties. Large cross-section samples, 4 × 10 mm2, with three perimeter layers and 50% infill, have lower mechanical strength than injection molded reference samples—less than 60% of the strength. However, if we reduce the cross-section dimensions down to 2 × 4 mm2, the samples will be more durable, reaching up to 110% of the tensile strength observed for the injection molded samples. In the case of large cross-section samples, strength increases with the number of contour layers, leading to an increase of up to 97% of the tensile strength value for 11 perimeter layer samples. The mechanical strength of the printed components can also be improved by using lower values of the thickness of the deposited layers.

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