Relevant bibliographies by topics / High Temperature Low Sag (HTLS) conductors

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Academic literature on the topic 'High Temperature Low Sag (HTLS) conductors'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "High Temperature Low Sag (HTLS) conductors"

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Mamala, Andrzej, Tadeusz Knych, Beata Smyrak, Paweł Kwaśniewski, Grzegorz Kiesiewicz, Michał Jabłoński, and Wojciech Ściężor. "An Analytical Model for the High Temperature Low Sag Conductor Knee Point Determination." Key Engineering Materials 641 (April 2015): 173–80. http://dx.doi.org/10.4028/www.scientific.net/kem.641.173.

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The modern high voltage power overhead lines operate with high temperature low sag (HTLS) conductors due to possibility of the current capacity increase. HTLS conductors are material and technological advanced solutions. The main advantage of HTLS conductors is a special designed operation conditions which cause the transformation of tensile stresses from the external aluminium base layers to the core. The conditions of this transformation are called “knee point” because a rapid change of the conductor sag - temperature relationship is observed. Prediction of conditions of the “knee point” temperature (KPT) is a key problem during overhead line design. The KPT is a function of different factors like conductor materials properties, conductor design, span parameters, sagging procedures and overhead line exploitation conditions. The paper presents an original theoretical model for HTLS conductors KPT calculations and shows some examples and comparisons of the different conductor designs and parameters.
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Reddy B., Subba, and Gaurav Mitra. "Investigations on High Temperature Low Sag (HTLS) Conductors." IEEE Transactions on Power Delivery 35, no. 4 (August 2020): 1716–24. http://dx.doi.org/10.1109/tpwrd.2019.2950992.

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Bedialauneta, Miren T., Igor Albizu, Elvira Fernandez, and A. Javier Mazon. "Uncertainties in the Testing of the Coefficient of Thermal Expansion of Overhead Conductors." Energies 13, no. 2 (January 14, 2020): 411. http://dx.doi.org/10.3390/en13020411.

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Overhead lines can be replaced by high temperature low sag (HTLS) conductors in order to increase their capacity. The coefficients of thermal expansion (CTE) of the HTLS conductors are lower than the CTE of conventional conductors. The utilities and conductor manufacturers usually carry out the verification of the CTE of the overhead conductors in an actual size span. The verification is based on the observation of the change of the conductor length as a result of the conductor temperature change. This process is influenced by the coefficient of thermal expansion to be verified. However, there are other factors that also affect it. This paper analyzes the effect of some of the uncertainty sources in the testing of the coefficient of thermal expansion of the overhead conductors. Firstly, the thermal expansion process is described and the uncertainty sources related to the conductor and the line section are identified. Then, the uncertainty sources and their effect on the CTE testing are quantified.
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Ippolito, M. G., F. Massaro, and C. Cassaro. "HTLS Conductors: A Way to Optimize RES Generation and to Improve the Competitiveness of the Electrical Market—A Case Study in Sicily." Journal of Electrical and Computer Engineering 2018 (September 6, 2018): 1–10. http://dx.doi.org/10.1155/2018/2073187.

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Stringent environmental constraints make more difficult to identify new energy corridors and build new power lines. The increase in the generation of electricity from renewable energy sources (RESs) makes the operation of electrical systems increasingly difficult in some areas. The transmission system operators (TSOs), in Italy Terna, are forced to exploit the existing overhead transmission lines, increasing the possibility of dispatching energy, in particular RES, optimizing the transmission capacity. Therefore, after a brief presentation of the Sicilian electricity system and a brief description of high-temperature low-sag (HTLS) conductors, a case study is presented. It is shown how it is possible to optimize the dispatching from renewable sources and, finally, it is demonstrated how the use of HTLS conductor can contribute, together with other actions taken by the TSO, to the decrease of the zonal price of electricity, to the creation of a market with fewer constraints and to new operating conditions that increase the resilience of the electricity system in case of disturbances.
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Desprianto, Rahmad Yusuf, Suprihadi Prasetyono, and Dedy Kurnia Setiawan. "Studi Perencanaan Upgrade Transmisi Tegangan Tinggi 150 kV Perak-Ujung Menggunakan Konduktor HTLS (High Temeprature-Low Sag)." BERKALA SAINSTEK 5, no. 2 (November 7, 2017): 118. http://dx.doi.org/10.19184/bst.v5i2.5704.

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Saluran transmisi udara 150 kV pada umumnya menggunakan konduktor ACSR (Alumunium Conductor Steel Reinfoiced) yang mempunyai titik kerja suhu yang terbatas. Saluran transmisi udara akan mengalami titik jenuh seiring meningkatnya kebutuhan listrik. Dengan menyempitnya lahan dan masalah investasi maka saluran yang telah ada perlu dioptimalkan dengan melakukan reconductoring menggunakan konduktor HTLS (High Temperature Low Sag). Konduktor HTLS mempunyai titik kerja suhu yang tinggi dibandingkan konduktor ACSR. Penelitian ini bertujuan untuk meningkatkan kapasitas hantar arus serta untuk memenuhi kehandalan N-1 dari saluran transimsi udara dengan memilih konduktor jenis HTLS yang meliputi ACCC, ACCR dan TACSR yang sesuai dengan struktur jaringan transmisi. Dengan menggunakan metode keseimbangan panas dalam menghitung ampacity dan metode cartenary dalam menghitung andongan dan tegangan tarik maka akan diketahui konduktor yang sesuai dengan struktur yang telah ada. Dari hasil penelitian menunjukkan konduktor ACCC jauh lebih handal dengan mampu menaikkan kapasitas hantar arus hingga 96,3 % sedangkan ACCR sebesar 83,9 % dan TACSR sebesar 40,7%. Dan andongan maksimal ACCC sebesar 4,692 m, ACCR sebesar 6,550 m dan TACSR sebesar 8,076 m dengan tegangan tarik yang dibutuhkan pada andongan maksimal berturut-turut sebesar 12,825 kN; 9,086 kN dan 8,119 kN. Kata Kunci: konduktor HTLS, reconductoring, transmisi udara.
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Yasaranga, H. B. D., W. D. A. S. Wijayapala, and K. T. M. U. Hemapala. "Techno Economic Analysis of the Use of High Temperature Low Sag (HTLS) Conductors in the Sri Lanka’s Transmission System." Engineer: Journal of the Institution of Engineers, Sri Lanka 50, no. 1 (February 9, 2017): 41. http://dx.doi.org/10.4038/engineer.v50i1.7243.

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Reddy, B. Subba, and Diptendu Chatterjee. "Analysis of High Temperature Low Sag Conductors Used for High Voltage Transmission." Energy Procedia 90 (December 2016): 179–84. http://dx.doi.org/10.1016/j.egypro.2016.11.183.

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Kwon, Jonghwan, and Kory W. Hedman. "Transmission expansion planning model considering conductor thermal dynamics and high temperature low sag conductors." IET Generation, Transmission & Distribution 9, no. 15 (November 19, 2015): 2311–18. http://dx.doi.org/10.1049/iet-gtd.2015.0257.

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Pelacchi, Paolo, and Davide Poli. "Thermo-Mechanical Model of Multi-Span Overhead Transmission Lines Equipped with High-Temperature Low-Sag Conductors." International Review on Modelling and Simulations (IREMOS) 8, no. 3 (June 30, 2015): 331. http://dx.doi.org/10.15866/iremos.v8i3.5918.

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Luqman, H. M., M. N. R. Baharom, N. A. M. Jamail, N. A. Othman, R. Abd Rahman, M. F. M. Yousof, and Irshad Ullah. "Conductor sag comparison for 132 kV overhead transmission line improvement in Malaysia." Bulletin of Electrical Engineering and Informatics 9, no. 1 (February 1, 2020): 39–47. http://dx.doi.org/10.11591/eei.v9i1.1863.

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This paper presents conductor sag comparison for 132 kV overhead transmission line improvement in Malaysia. Increasing industrialization and population growth around the world demands higher electricity supply. Power generation has yet to decline but transmitting sufficient electricity to consumers is worrisome due to scarce land space occupied by rapid urbanization. Hence reconductoring method was chosen to improve existing 132 kV overhead transmission line in Malaysia. A group of selected conductors were chosen for comparison where the high temperature low sag conductor stood out the most producing up to 40% sag reduction. This paper focuses on providing conductor alternatives to improve maximum sag of lowest conductor to ground for 132 kV transmission line in Malaysia in accordance to her climate and geographical factor.
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Dissertations / Theses on the topic "High Temperature Low Sag (HTLS) conductors"

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"Making the Case for High Temperature Low Sag (HTLS) Overhead Transmission Line Conductors." Master's thesis, 2014. http://hdl.handle.net/2286/R.I.24772.

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abstract: The future grid will face challenges to meet an increased power demand by the consumers. Various solutions were studied to address this issue. One alternative to realize increased power flow in the grid is to use High Temperature Low Sag (HTLS) since it fulfills essential criteria of less sag and good material performance with temperature. HTLS conductors like Aluminum Conductor Composite Reinforced (ACCR) and Aluminum Conductor Carbon Composite (ACCC) are expected to face high operating temperatures of 150-200 degree Celsius in order to achieve the desired increased power flow. Therefore, it is imperative to characterize the material performance of these conductors with temperature. The work presented in this thesis addresses the characterization of carbon composite core based and metal matrix core based HTLS conductors. The thesis focuses on the study of variation of tensile strength of the carbon composite core with temperature and the level of temperature rise of the HTLS conductors due to fault currents cleared by backup protection. In this thesis, Dynamic Mechanical Analysis (DMA) was used to quantify the loss in storage modulus of carbon composite cores with temperature. It has been previously shown in literature that storage modulus is correlated to the tensile strength of the composite. Current temperature relationships of HTLS conductors were determined using the IEEE 738-2006 standard. Temperature rise of these conductors due to fault currents were also simulated. All simulations were performed using Microsoft Visual C++ suite. Tensile testing of metal matrix core was also performed. Results of DMA on carbon composite cores show that the storage modulus, hence tensile strength, decreases rapidly in the temperature range of intended use. DMA on composite cores subjected to heat treatment were conducted to investigate any changes in the variation of storage modulus curves. The experiments also indicates that carbon composites cores subjected to temperatures at or above 250 degree Celsius can cause permanent loss of mechanical properties including tensile strength. The fault current temperature analysis of carbon composite based conductors reveal that fault currents eventually cleared by backup protection in the event of primary protection failure can cause damage to fiber matrix interface.
Dissertation/Thesis
Fault current temperature relationship program in C
Current temperature relationship program in C
M.S. Electrical Engineering 2014
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"HTLS UPGRADES FOR POWER TRANSMISSION EXPANSION PLANNING AND OPERATION." Master's thesis, 2014. http://hdl.handle.net/2286/R.I.24825.

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abstract: Renewable portfolio standards prescribe for penetration of high amounts of re-newable energy sources (RES) that may change the structure of existing power systems. The load growth and changes in power flow caused by RES integration may result in re-quirements of new available transmission capabilities and upgrades of existing transmis-sion paths. Construction difficulties of new transmission lines can become a problem in certain locations. The increase of transmission line thermal ratings by reconductoring using High Temperature Low Sag (HTLS) conductors is a comparatively new technology introduced to transmission expansion. A special design permits HTLS conductors to operate at high temperatures (e.g., 200oC), thereby allowing passage of higher current. The higher temperature capability increases the steady state and emergency thermal ratings of the transmission line. The main disadvantage of HTLS technology is high cost. The high cost may place special emphasis on a thorough analysis of cost to benefit of HTLS technology im-plementation. Increased transmission losses in HTLS conductors due to higher current may be a disadvantage that can reduce the attractiveness of this method. Studies described in this thesis evaluate the expenditures for transmission line re-conductoring using HTLS and the consequent benefits obtained from the potential decrease in operating cost for thermally limited transmission systems. Studies performed consider the load growth and penetration of distributed renewable energy sources according to the renewable portfolio standards for power systems. An evaluation of payback period is suggested to assess the cost to benefit ratio of HTLS upgrades. The thesis also considers the probabilistic nature of transmission upgrades. The well-known Chebyshev inequality is discussed with an application to transmission up-grades. The Chebyshev inequality is proposed to calculate minimum payback period ob-tained from the upgrades of certain transmission lines. The cost to benefit evaluation of HTLS upgrades is performed using a 225 bus equivalent of the 2012 summer peak Arizona portion of the Western Electricity Coordi-nating Council (WECC).
Dissertation/Thesis
M.S. Electrical Engineering 2014
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"Algorithm and Model Development for Innovative High Power AC Transmission." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.29610.

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abstract: This thesis presents research on innovative AC transmission design concepts and focused mathematics for electric power transmission design. The focus relates to compact designs, high temperature low sag conductors, and high phase order design. The motivation of the research is to increase transmission capacity with limited right of way. Regarding compact phase spacing, insight into the possibility of increasing the security rating of transmission lines is the primary focus through increased mutual coupling and decreased positive sequence reactance. Compact design can reduce the required corridor width to as little as 31% of traditional designs, especially with the use of inter-phase spacers. Typically transmission lines are built with conservative clearances, with difficulty obtaining right of way, more compact phase spacing may be needed. With design consideration significant compaction can produce an increase by 5-25% in the transmission line security (steady state stability) rating. In addition, other advantages and disadvantages of compact phase design are analyzed. Also, the next two topics: high temperature low sag conductors and high phase order designs include the use of compact designs. High temperature low sag (HTLS) conductors are used to increase the thermal capacity of a transmission line up to two times the capacity compared to traditional conductors. HTLS conductors can operate continuously at 150-210oC and in emergency at 180-250oC (depending on the HTLS conductor). ACSR conductors operate continuously at 50-110oC and in emergency conditions at 110-150oC depending on the utility, line, and location. HTLS conductors have decreased sag characteristics of up to 33% compared to traditional ACSR conductors at 100oC and up to 22% at 180oC. In addition to what HTLS has to offer in terms of the thermal rating improvement, the possibility of using HTLS conductors to indirectly reduce tower height and compact the phases to increase the security limit is investigated. In addition, utilizing HTLS conductors to increase span length and decrease the number of transmission towers is investigated. The phase compaction or increased span length is accomplished by utilization of the improved physical sag characteristics of HTLS conductors. High phase order (HPO) focuses on the ability to increase the power capacity for a given right of way. For example, a six phase line would have a thermal rating of approximately 173%, a security rating of approximately 289%, and the SIL would be approximately 300% of a double circuit three phase line with equal right of way and equal voltage line to line. In addition, this research focuses on algorithm and model development of HPO systems. A study of the impedance of HPO lines is presented. The line impedance matrices for some high phase order configurations are circulant Toeplitz matrices. Properties of circulant matrices are developed for the generalized sequence impedances of HPO lines. A method to calculate the sequence impedances utilizing unique distance parameter algorithms is presented. A novel method to design the sequence impedances to specifications is presented. Utilizing impedance matrices in circulant form, a generalized form of the sequence components transformation matrix is presented. A generalized voltage unbalance factor in discussed for HPO transmission lines. Algorithms to calculate the number of fault types and number of significant fault types for an n-phase system are presented. A discussion is presented on transposition of HPO transmission lines and a generalized fault analysis of a high phase order circuit is presented along with an HPO analysis program. The work presented has the objective of increasing the use of rights of way for bulk power transmission through the use of innovative transmission technologies. The purpose of this dissertation is to lay down some of the building blocks and to help make the three technologies discussed practical applications in the future.
Dissertation/Thesis
Doctoral Dissertation Electrical Engineering 2015
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Book chapters on the topic "High Temperature Low Sag (HTLS) conductors"

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Netake, Abhilash, and P. K. Katti. "HTLS Conductors." In Research Advances in the Integration of Big Data and Smart Computing, 211–23. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8737-0.ch012.

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The power system has undergone multifold growth in its generation, transmission and distribution in past few decades. The types of conductors used for transmission system in India are ACSR / AAAC. These conductors have several constraints. The Ampacity of these conductors is less and hence they cannot be operated at high temperature also the losses in these type of conductors are more. To overcome the drawbacks of ACSR / AAAC conductors, this paper proposes a new approach of using High Tension Low Sag (HTLS) conductors, also a comparison is made between ACSR, AAAC and HTLS conductors on the basis of voltage drop and power loss for benefit evaluation of HTLS conductor over traditionally used conductors.
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Conference papers on the topic "High Temperature Low Sag (HTLS) conductors"

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Stengel, Dominik, Richard Bardl, Christian Kuhnel, Steffen Grossmannn, and Wilhelm Kiewitt. "Accelerated electrical and mechanical ageing tests of high temperature low sag (HTLS) conductors." In 2017 12th International Conference on Live Maintenance (ICOLIM). IEEE, 2017. http://dx.doi.org/10.1109/icolim.2017.7964157.

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Tokombayev, Askhat, and Gerald T. Heydt. "High temperature low sag (HTLS) technologies as upgrades for overhead transmission systems." In 2013 North American Power Symposium (NAPS). IEEE, 2013. http://dx.doi.org/10.1109/naps.2013.6666834.

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Reddy, B. Subba, and Diptendu Chatterjee. "Computation of current and temperature distribution for high temperature low sag conductors." In 2014 6th IEEE Power India International Conference (PIICON). IEEE, 2014. http://dx.doi.org/10.1109/poweri.2014.7117644.

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Reddy, B. Subba, and Diptendu Chatterjee. "Computation of current and temperature distribution for high temperature low sag conductors." In 2014 6th IEEE Power India International Conference (PIICON). IEEE, 2014. http://dx.doi.org/10.1109/34084poweri.2014.7117644.

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Subba Reddy, B., and Gaurav Mitra. "Estimation of Magnetic Fields near to High Temperature Low Sag Conductors." In 2020 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT). IEEE, 2020. http://dx.doi.org/10.1109/conecct50063.2020.9198343.

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