A high-energy-efficiency wire with reduced thermal inflection point and its manufacturing method
A manufacturing method and high-energy-efficiency technology, applied in the direction of cable/conductor manufacturing, conductors, insulated conductors, etc., to achieve high energy efficiency and reduce the effect of thermal inflection point
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Embodiment 1
[0124] Example 1: Power grid capacity expansion and transformation
[0125] The usual voltage range for transmission line expansion and transformation is 110KV-500KV, and the existing power towers are used as much as possible to reduce project costs and power outage time. Line transformation can be carried out live, and there is no need to arrange power outages during the transformation process. The main focus of line reconstruction is to maximize the capacity of the transmission line within the constraints of the existing overhead space and to utilize the existing infrastructure as much as possible. The wire of the present invention is most suitable for this application, including the highest density wire (nearly 100% concentric layer, which is higher than the typical dense stranded wire 93% fill rate of CTC Global's ACCC wire), in normal operation Provides the highest possible capacity (lowest resistive loss) under these conditions. In the case of emergency current-carryin...
Embodiment 2
[0131] Example 2: Application of new transmission and distribution network
[0132] Greenfield projects are usually more sensitive to material and labor costs such as wire costs, fixture costs and tower costs. Some new projects are aimed at long-distance transmission and UHV, and the corona effect must be controlled to minimize wire resistance and line loss.
[0133] The present invention practice includes wire stranding along the sheathed pre-tensioned load bearing core with additional layers of wire to increase the wire diameter for UHV applications, which facilitates handling (requires smaller spool coils). For 60Hz AC circuit aluminum conductors, the surface effect requires a maximum thickness of the conductive layer of 17 mm. Large wires need to consider multi-layer construction. Since the large-area cladding aluminum is already in prestress, it is very easy to perform additional pretension stress treatment on the wire so that the outer wire layer is under compressive s...
Embodiment 3
[0136] Example 3: Application under special circumstances (extremely long spans across rivers, severely frozen and severely corroded areas)
[0137] High-strength and high-modulus dense conductors are required for cross-river and long-span applications or severely frozen areas. If the power transmission line is subject to thermal sag constraints, partial or complete thermal inflection suppression is required. If the sag overhead distance of the transmission line is driven by ice load or wire weight, it is required to use a high-strength and lightweight fiber reinforced composite load-bearing core) with a part or most of aluminum alloy (such as aluminum-zirconium alloy, 6201-T81) or copper and copper Alloy bearing to reduce sag (the thermal inflection point of the wire is less suppressed, that is, the additional conductive material layer (except for the prestressed load-bearing core covering the conductive layer) does not withstand the prestressing treatment.) Fully prestressin...
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Abstract
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