A Composite Core Conductor for Low Sag at High Temperatures

Alawar, Ahmad; Bosze, E.J.; Nutt, Steven

doi:10.1109/tpwrd.2005.848736

Cited by 121 publications

(65 citation statements)

References 3 publications

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“…Different conductor types can be used when elevated conductor operating temperatures are required allowing further increase in a conductor's thermal rating without loosing mechanical strength. Such conductors are usually described as HighTemperature Low-Sag (HTLS) conductors and have opened the horizons to new conductor designs applying new composite materials and technologies [1,2].…”

Section: Introductionmentioning

confidence: 99%

Power transfer capacity improvements of existing overhead line systems

Kopsidas

Rowland

Baharom

et al. 2010

2010 IEEE International Symposium on Electrical Insulation

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Abstract-The increased demand for power transfer in combination with environmental and economic issues which set constraints to building new lines, force the implementation of new technologies into the existing system in order to improve its power capability. Such methods involve re-tensioning, reconductoring, or modifying the tower design to utilize composite cross-arms. It is hypothesized that a composite cross-arm and a novel conductor together provide an insulating significant opportunity to increase the overhead line voltage. The paper explores the range of options that could be implemented on an L3 overhead line tower typically used at 275kV in the United Kingdom, and demonstrates clear improvement in power capacitiy through the implementation of new technologies.

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Section: Introductionmentioning

confidence: 99%

Power transfer capacity improvements of existing overhead line systems

Kopsidas

Rowland

Baharom

et al. 2010

2010 IEEE International Symposium on Electrical Insulation

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“…The standard model includes IEC model and IEEE model [5][6], by which the ampacity of conductors may be estimated on condition of different weather as well as carrying current. While the thermal circuit model introduces thermoelectricity analogy theory into IEEE model to simplify the complicated heat transfer computation of conductors [7][8][9]. By this way, conductors' thermal dynamic process can be deduced through less parameters, elevating model's effectivity when applied into dynamic capacity-increase.…”

Section: Introductionmentioning

confidence: 99%

Current-temperature model of ACCC conductors based on GA identification method

Tong¹,

Zhang²

2017

2nd Annual International Conference on Energy, Environmental &Amp; Sustainable Ecosystem Development (EESED 2016)

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As a new energy-saving conductor, ACCC conductor, which has the advantages of low weight, high conductivity, can double the ampacity of conventional conductors. However due to the differences between ACCC conductor and conventional conductors, present current-temperature model cannot be directly applied into the ampacity calculating of ACCC conductor. Consequently, the transmission capacity of ACCC conductor is limited. To address this problem, a current-temperature model for ACCC conductor based on thermal equilibrium principle and thermoelectricity analogy theory is proposed in this paper. Then, a GA identification method is employed to identify the model parameters. In order to validate the proposed model, an experiment platform is set up and the experiment results are presented and discussed.

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“…The most commonly implemented HTLS technologies are: aluminium conductor steel supported (ACSS) with the soft/annealed aluminium providing the conduction and the steel core providing most of the tensile strength [2]; zirconium treated aluminium conductor invar reinforced (ZTACIR) whose steel core and aluminium are specially processed to reduce thermal expansion and maintain strength at high temperatures [3]; gap-type ACSR (GZTACSR) that allows to easily control the conductor's knee-point temperature (KPT) at installation [4]; aluminium conductor composite reinforced (ACCR) [5]; and aluminium conductor composite (non-conductive) core (ACCC) [6]. The last two technologies use lighter core material than steel to further improve strength-to-mass ratio (compared to AAACs) and improve the overall OHL performance.…”

Section: Introductionmentioning

confidence: 99%

Overhead line design considerations for conductor creep mitigation

Kopsidas¹,

Boumecid

Cooper

2016

IET Generation, Transmission & Distribution

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Utilities are continuously investigating methods to economically reinforce their overhead line (OHL) networks by reconductoring with larger conductors or with novel high-temperature low-sag (HTLS) conductor technologies. To further optimize the OHL design, conductor creep ageing is calculated and mitigated at installation, which economically improves an OHLs' performance. An already established methodology is used to investigate common and HTLS conductors ageing effect on sag and tension in order to highlight the benefits and risks that could result from existing creep mitigation methods particularly on HTLS conductors. The paper aims to identify the impact of important design factors, such as ice loading and emergency operation events and their frequency of occurrence, on creep mitigation as well as to highlight the creep variation of the same materials used particularly on different HTLS conductors. The analysis presented here indicates that pre-tensioning could be more beneficial on soft aluminium HTLS conductors while over-tensioning can result in extensive durations of conductor over-stressing on steel supported and gap type conductors. Furthermore, the conductor technology majorly affects the creep of steel core which cannot be considered always as zero. The accuracy of the methodology is also re-validated using recent experimental data from gap conductor.

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A Composite Core Conductor for Low Sag at High Temperatures

Cited by 121 publications

References 3 publications

Power transfer capacity improvements of existing overhead line systems

Power transfer capacity improvements of existing overhead line systems

Current-temperature model of ACCC conductors based on GA identification method

Overhead line design considerations for conductor creep mitigation

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