Study on the Limited Values of Foundation Deformation for a Typical UHV Transmission Tower

The tower foundation above the goal of the coal mine is easily deformed, which causes a serious threat to the safe operation of ultra-high voltage (UHV) transmission lines. In this paper, the finite-element model of a typical 1000-kV UHV ac transmission tower was established in general software ANSY...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on power delivery 2010-10, Vol.25 (4), p.2752-2758
Main Authors: Yang, Fengli, Yang, Jingbo, Han, Junke, Zhang, Zifu
Format: Article
Language:English
Subjects:
Applied sciences
Current control
Deformation
Electrical engineering. Electrical power engineering
Electrical machines
Electrical power engineering
Exact sciences and technology
Finite element analysis
Finite element methods
Foundation deformation
Foundations
Fuel processing industries
goaf of coal mine
Horizontal
limited values
Load modeling
Loads (forces)
Miscellaneous
Nonuniform
Overhead networks
Power networks and lines
Power transmission lines
Regulation and control
righting
Settlements
Slip
Towers
ultra-high voltage (UHV) transmission tower
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The tower foundation above the goal of the coal mine is easily deformed, which causes a serious threat to the safe operation of ultra-high voltage (UHV) transmission lines. In this paper, the finite-element model of a typical 1000-kV UHV ac transmission tower was established in general software ANSYS, and the axial forces of the members as well as their variation trends were analyzed under different load cases, which include foundation settlement, slip, and inclination combined with normal design cases. Limited values of the foundation deformation under different cases for the analyzed tower were determined. It shows that the limited values of longitudinal deformation, transverse deformation, nonuniform settlement, and horizontal slip are decreased, in turn, with the same external loads. The limited value of the foundation deformation under 60° wind is the minimum, which is the control load case of the foundation deformation. The limited value of nonuniform settlement through computation is lower than that of the current regulation, and it is dangerous to evaluate the stress state by the regulation method. In the righting process of the tower with foundation deformation, the axial forces of the members are not more than than the critical bearing capacities except the horizontal slip case, and the tower is in a safe state.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2010.2045662