Research Of Large Cross-section Steel-reinforced Aluminiumalloy Conductor With Not-Circular Strands For Heavy-ice HVDC Lines

Conductor is the main carrier of the power transmission, it is necessary to have a mainfunction of transporting electricity, and also to meet the line’s good safety and therequirements of the environmental protection. Heavy ice area lines are prone to overload anduneven ice breaking, broken raised unit, endangering the safe operation of the lines, so heavyice area wire must not only has excellent electrical properties, but also has good mechanicalproperties. Steel-core forming aluminum alloy stranded wire is an excellent new wire whichcombines the advantages of both type wire and aluminum alloy wire. With the developmentof the wire manufacturing technology, the reduction of manufacturing costs, and its economygrowing, it will have a broad application prospects in the line of heavy ice line.Based on the transmission line project of the right bank of Xiluodu hydropower stationto Guangdong500kV DC double circuit on the same tower project,which is responsible forthe implementation of China Southern Power Grid, this paper stating with30mm iceconductor selection discussed the calculation principle, feasibility and necessity of using alarge cross-section steel core molding aluminum alloy stranded..And then carried out researchon four productive wire manufacturers. On the basis of research, identified usingJLHA2X/G1A-1035/75technical parameters for steel-core forming aluminum alloy wire. Onthe base of investigation determined the domestic manufacturers with production of the typewire tooling equipment and technical capacity, the types of conductors can achievelocalization.JLHA2X/G1A-1035/75steel-core aluminum alloy stranded is a new type oflarge-section aluminum alloy wire, before this project, there is no hardware fittings with itsmatch. The author and the related manufacture made a development onJLHA2X/G1A-1040/75steel-core aluminum alloy type stranding ancillary fittings, thedeveloped hardware fittings have passed technical appraisal. Its development of pendant lineclip, and resistance update line clip, and continued gold with, and pre-stranded type intervalrod, gold with of machinery performance meet related point specification requirements, itselectrical performance meet altitude height2000m of design requirements, products trialsamples by pass has electrical and machinery performance test, the performance indicatorsmeet national standards and the this engineering products development technology conditionsof requirements, meet engineering construction needs.By the author of the study, discusses the development of ice in large section steel-corealuminum strand on the right bank of Xiluodu hydropower station power supply inGuangdong500kV DC double circuit transmission lines on the same tower project is economical, safe and reliable...