The use of wide-flange shapes in transmission towers

1982 ◽  
Vol 9 (1) ◽  
pp. 129-133
Author(s):  
Murty K. S. Madugula ◽  
Gupta S. R. Davalath ◽  
V. L. Rea
Keyword(s):  
High Voltage ◽  
Transmission Tower ◽  
Electrical Transmission ◽  
Transmission Towers ◽  
Dead End ◽  
Heavy Loads ◽  
Extra High Voltage ◽  
Ultra High Voltage

The members of self-supporting latticed electrical transmission towers customarily consist of rolled angle sections. Nowadays, with transmission voltages in the extra-high-voltage and ultra-high-voltage ranges, the leg members are required to carry very heavy loads, especially in the case of heavy angle and anchor towers. Results of a study carried out on wide-flange shapes, to investigate their suitability as alternative sections to welded and built-up angles, are presented. The world's first transmission tower that has wide-flange shapes for legs and arms, Ontario Hydro's 500-kV double circuit heavy angle dead end tower type V6H, is described.

Influence Coefficient of Filler Plates in Built-Up Cruciform Section Members Formed by Two Equal-Leg Angles

2011 ◽  
Vol 243-249 ◽  
pp. 584-591
Author(s):  
Long Yu Yang ◽  
Zheng Liang Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Bearing Capacity ◽  
High Voltage ◽  
Cross Sections ◽  
Radius Of Gyration ◽  
Influence Coefficient ◽  
Transmission Towers ◽  
Minimal Radius ◽  
Extra High Voltage

The built-up cruciform section formed by two equal-leg angles has been widely applied in extra high voltage(EHV) transmission towers, however, domestic codes provide structure requirement and overlook the influence of multi filler plates to members’ bearing capacity. For the purpose of this, a pin end experiment covering 3 different cross sections(Q420, L160*12, L160*14 and L160*16) and 7 different slendernesses(25~55) has been run. This experiment contains totally 21 specimens. Furthermore, large amounts of models have been analysis by finite element method whose parameters contain variety b/t, λ, filler plate intervals and forms, amount of bolts in filler plate. A recommended formula is given for evaluating the influence of filler plates. The results show: multi filler plates enhance bearing capacity slightly for members with λ less than 35, and the better interval for filler plates is 10i-40i(i is the minimal radius of gyration); filler plates do not work well when b/t of the member is extreme large or small, a propositional b/t range for this kind of member is 11-16; the amount of bolts in filler plate has tiny influence on members’ bearing capacity; the recommended formula is applicable and feasible for design.

scholarly journals FE Simulation of Transmission Tower

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Boshra Eltaly ◽  
Amen Saka ◽  
Kamel Kandil
Keyword(s):  
Transmission Line ◽  
Good Accuracy ◽  
Failure Load ◽  
Fe Simulation ◽  
Numerical Models ◽  
Joint Effect ◽  
Transmission Tower ◽  
Electrical Transmission ◽  
Transmission Towers ◽  
Phase Conductors

The vital components of the transmission line are the electrical transmission towers. They are commonly used to support the phase conductors and shield wires of a transmission line. Also the accurate prediction of tower failure is very important for the reliability and safety of the transmission system. The current research describes nonlinear FE models of predicting the transmission tower failure. In the current FE simulations, the eccentricity and the joint effect of the tower were considered. The current models have been calibrated with results from previous full-scale tower tests and numerical models with good accuracy in terms of both the failure load and the failure mode.

Is there a grid-connected effect of grid infrastructure on renewable energy generation? Evidence from China's upgrading transmission lines

2021 ◽  
pp. 0958305X2110310
Author(s):  
Yongpei Wang ◽  
Chao Xu ◽  
Pinghong Yuan
Keyword(s):  
Energy Source ◽  
Power Generation ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
High Voltage ◽  
Power Grid ◽  
Power Grids ◽  
Grid Infrastructure ◽  
Extra High Voltage ◽  
Ultra High Voltage

China has built the world's largest power infrastructure. Those upgrading power grid facilities not only contribute to providing enough end-used energy for the world's factories, but also offering a basic guarantee for the clean strategy of Building a Beautiful China proposed by the Chinese government. The national grid system supported by extra-high voltage and ultra-high voltage grids as the backbone makes it possible for a non-dispatchable renewable energy source to be connected to the national grid and transmitted to terminal consumers in load centers. The aim of this paper is to test whether China's advanced power grids have played a positive role in promoting power generation of intermittent renewable energy source. A novel nonlinear estimation named panel smoothing transition regression is introduced to capture heterogeneous effects of grid-connecting renewable energy source across regions. The empirical results show that whereas power grid infrastructure generally enhances power generation of renewable energy source and consumption in energy bases and load centers, the effects change across different voltage levels of power grids. The extra-high voltage power grids show strong support for grid-connecting renewable energy source, while the effect of ultra-high voltage power grids is unexpectedly insignificant. The extra-high voltage power grids have not yet become the backbone of the national grid, which is the main reason for the inadequate grid-connected renewable energy source to the ultra-high voltage power grids, indicating the importance of upgrading the power grid infrastructure.

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