Incremental Method for Sag-Tension Calculations

Landau, Maurice

doi:10.1109/t-aiee.1951.5060601

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Considerable work on the topic took place during the 1950s and 1960s, mainly focusing on graphical and analytical methods for sag-tension calculations [2][3][4] and methods for the estimation of the current-carrying capacity of ACSR conductors [5,6]. A method for sag-tension calculation based on stress-strain and temperature elongation data obtained on ACSR conductors was presented in [7] and had been further extended and developed to a computer program (STESS) for use in transmission line and operation [8].…”

Section: Overview Of Existing Literature On Sag-tension Methodsmentioning

confidence: 99%

A Holistic Method for Conductor Ampacity and Sag Computation on an OHL Structure

Kopsidas

Rowland

Boumecid

2012

IEEE Trans. Power Delivery

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The rating current (ampacity) of a conductor erected on a particular overhead line (OHL) structure installed at a specified location is influenced by the conductor, the OHL structure as well as weather and operational parameters. Many studies have been carried out regarding calculating an aerial bare conductor's ampacity at a steady-state conductor temperature, but without considering the OHL structure as part of the system. In this paper, a holistic methodology for calculating the conductor's ampacity and sag at any temperature and power frequency, erected onto a pre-specified OHL structure is developed, considering together the mechanical and electrical parameters of the overall system. This methodology incorporates the conductor's basic material properties allowing the calculations to be applied to newly developed high temperature low sag composite conductors. In this way it becomes possible to identify, at system level, the potential benefits that may result from the improved performance of these conductors as well as to indicate new sizes that may better fit a pre-specified system, optimizing its performance. The methodology is also validated with a real system application, resulting in correct predictions of the performance of a 4-span double line system.

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Section: Overview Of Existing Literature On Sag-tension Methodsmentioning

confidence: 99%

A Holistic Method for Conductor Ampacity and Sag Computation on an OHL Structure

Kopsidas

Rowland

Boumecid

2012

IEEE Trans. Power Delivery

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“…The mathematical model that describes the behavior of the cable is based on the catenary curve and, in most cases, the parabola is used as an approximation, as it is easier to apply [3]. The use of a Taylor series is required to approximate both the profile and length of the cable [4,5]. The arc length of the parabola is essential for solving the steady-static response equation of the cable [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Didactic Procedure to Solve the Equation of Steady-Static Response in Suspended Cables

et al. 2020

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Students in the electrical branch of the short-cycle tertiary education program acquire developmental and design skills for low voltage transmission power lines. Aerial power line design requires mathematical tools not covered well enough in the curricula. Designing suspension cables requires the use of a Taylor series and integral calculation to obtain the parabola’s arc length. Moreover, it requires iterative procedures, such as the Newton–Raphson method, to solve the third-order equation of the steady-static response. The aim of this work is to solve the steady-static response equation for suspended cables using simple calculation tools. For this purpose, the influence of the horizontal component of the cable tension on its curvature was decoupled from the cable’s self-weight, which was responsible for the tension’s vertical component. To this end, we analyzed the laying and operation of the suspended cables by defining three phases (i.e., stressing, lifting, and operation). The phenomena that occurred in each phase were analyzed, as was their manifestation in the cable model. Herein, we developed and validated the solution of the steady-static response equation in suspended cables using simple equations supported with intuitive graphics. The best results of the proposed calculation procedure were obtained in conditions of large temperature variations.

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Overview of the transmission line construction process

Castro¹

1995

Electric Power Systems Research

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Incremental Method for Sag-Tension Calculations

Cited by 4 publications

References 3 publications

A Holistic Method for Conductor Ampacity and Sag Computation on an OHL Structure

A Holistic Method for Conductor Ampacity and Sag Computation on an OHL Structure

A Didactic Procedure to Solve the Equation of Steady-Static Response in Suspended Cables

Overview of the transmission line construction process

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