%0 Generic %1 mcculloch1981compact %A McCULLOCH, A.R. %A RALSTON, P %D 1981 %K Compact Conductor Environment Line Upgraded %T COMPACT CONDUCTORS FOR TRANSMISSION LINES %X Environmental considerations and their effect on obtaining new rights of way have resulted in the need to upgrade existing transmission lines. Operating temperatures have been raised, towers raised by adding extensions and larger conductors installed on some lines. Because of the volume of this work, it was decided that more optimized designs could be attained. Ontario Hydro, with the conductor manufacturer, investigated new conductor designs in an effort to make line upgrading more fruitful. Items such as high steel content, increased aluminum area, reduced a-c resistance, an increased upper limit on operating temperature and minimum diameter, were considered as essential features of a new conductor. Based on these considerations, the manufacturer proposed two conductors of "compact" design. One was 40.6 mm OD with an aluminum area of 975 mm2 to replace 34 mm OD 604.3 mm2 54/19 ACSR and the other was 34 mm OD 662.5 mm2 to replace 28.1 mm OD 402.8 mm2 26/7 ACSR. To date, 1600 circuit kilometres of 230 kV transmission lines on 17 different projects have been restrung. These compact conductors use electrical conductors (EC Grade) aluminum preshaped wires with standard strength steel core wires. Compact conductors offer a wide flexibility in their design due to the use of shaped aluminum wires. This flexibility facilitates optimization of conductor electrical and mechanical characteristics. Compact conductors offer several advantages over their equal diameter and strength to mass ratio round-wire equivalents, for instance, about 20% more aluminum area, smaller swing out in the wind, lower load factors, more ampacity, and lower temperature gradient are expected to reduce the conductor sag at elevated temperature, the shaped wires are expected to reduce the conductor creep and to improve the inter wire current distribution in the conductors. Additional advantages which might prove practical are improved corrosion protection of the core and improved voltage gradients because of the smooth outer surface.

@conference{mcculloch1981compact, abstract = {Environmental considerations and their effect on obtaining new rights of way have resulted in the need to upgrade existing transmission lines. Operating temperatures have been raised, towers raised by adding extensions and larger conductors installed on some lines. Because of the volume of this work, it was decided that more optimized designs could be attained. Ontario Hydro, with the conductor manufacturer, investigated new conductor designs in an effort to make line upgrading more fruitful. Items such as high steel content, increased aluminum area, reduced a-c resistance, an increased upper limit on operating temperature and minimum diameter, were considered as essential features of a new conductor. Based on these considerations, the manufacturer proposed two conductors of "compact" design. One was 40.6 mm OD with an aluminum area of 975 mm2 to replace 34 mm OD 604.3 mm2 54/19 ACSR and the other was 34 mm OD 662.5 mm2 to replace 28.1 mm OD 402.8 mm2 26/7 ACSR. To date, 1600 circuit kilometres of 230 kV transmission lines on 17 different projects have been restrung. These compact conductors use electrical conductors (EC Grade) aluminum preshaped wires with standard strength steel core wires. Compact conductors offer a wide flexibility in their design due to the use of shaped aluminum wires. This flexibility facilitates optimization of conductor electrical and mechanical characteristics. Compact conductors offer several advantages over their equal diameter and strength to mass ratio round-wire equivalents, for instance, about 20% more aluminum area, smaller swing out in the wind, lower load factors, more ampacity, and lower temperature gradient are expected to reduce the conductor sag at elevated temperature, the shaped wires are expected to reduce the conductor creep and to improve the inter wire current distribution in the conductors. Additional advantages which might prove practical are improved corrosion protection of the core and improved voltage gradients because of the smooth outer surface.}, added-at = {2021-02-09T11:01:29.000+0100}, author = {McCULLOCH, A.R. and RALSTON, P}, biburl = {https://www.bibsonomy.org/bibtex/25f3ada301aa2b0263bf8920e0d02d5a5/ceps}, interhash = {25a84ddcef139659e9391cf4ca97e53a}, intrahash = {5f3ada301aa2b0263bf8920e0d02d5a5}, keywords = {Compact Conductor Environment Line Upgraded}, timestamp = {2023-12-21T08:28:21.000+0100}, title = {COMPACT CONDUCTORS FOR TRANSMISSION LINES}, year = 1981 }