Deicing ground wire with high-voltage heavy current
A high current, ground wire technology, applied in circuits, insulated cables, electrical components, etc., to achieve the effect of reducing labor intensity
Inactive Publication Date: 2010-09-15
STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST +1
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide an ice-melting ground wire that can pass through high-voltage and high-current to meet the ice-melting needs of the ice disaster site in view of the backwardness of the existing technical facilities
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[0014] Such a kind of ice-melting ground wire that can pass high voltage and high current in this embodiment of the present invention, see figure 1 , the steel strand 1 adopts the GJ-70 galvanized steel strand produced by China Beijing Jinhai Electric Power Equipment Co., Ltd., with a cross-sectional area of 70mm 2 , diameter ￠11.0mm; insulated copper wire 2 adopts QZY type multi-layer film high-strength insulated cylindrical copper wire produced by China Shanghai Youtuo Electromagnetic Co., Ltd. These two kinds of transmission lines are according to above-mentioned technical solution and with reference to shown in accompanying drawing, get 15 strands with steel strand 1 and 4 strands of insulated copper wires 2 and mix and form rope-shaped wire rods. Make the cross section of the ground wire a "day"-shaped bead ring composed of steel strands 1 that are evenly distributed in a radial shape. The steel strands 1 on the ring are 12 strands, and the steel strands 1 on the diamet...
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The invention discloses a deicing ground wire with high-voltage heavy current. The deicing ground wire is manufactured by mixing at least two strands of steel strands (1) and two strands of insulated copper wires into a rope. The steel strands (1) uniformly distributed radially on the section of the ground wire form a Theta-shaped bead ring; and the insulated copper wires (2) are uniformly distributed on two sides of the steel strands (1) distributed on the radial line of the bead ring. The wire coated with ice can also be supplied with heavy-current for temperature rise and deicing by utilizing the characteristic of cold resistance of the insulated copper wires (2). The gravity of the overhead ground wire is supported by the steel strands (1) with tougher bearing capacity, and the normal operation of the transmission line is guaranteed. The deicing ground wire has the advantages that: 1) the ground wire maintains the normal functions of common ground wires and does not influence the work on the ground wire; 2) the ground wire is high voltage resistant and can be supplied with heavy current; 3) the ground wire is high temperature resistant and insulating layers are not damaged; and 4) the ground wire can be used for heavy-current deicing and greatly reduces the labor intensity of deicing.
Description
technical field [0001] The invention belongs to the technical field of electrical engineering equipment, in particular to an ice-melting ground wire capable of passing high-voltage and high-current. Background technique [0002] In recent years, due to the impact of freezing disasters, accidents such as disconnection of overhead ground wires and residual ground wires falling on the conductors have occurred frequently on transmission lines, causing short circuits in the conductors and causing line trips. After the accident, it is often necessary to de-ice the overhead ground wire, and the ice-melting method adopted for a long time is to melt the ice by applying a large AC or DC current. However, due to the unique composition and special installation method of the overhead ground wire, its insulation strength to the ground is not enough, so the applied voltage is limited, and its resistance is very large, so it is difficult to meet the requirements for the ice melting current,...
Claims
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Inventor 陆佳政方针李波赵纯张红先
Owner STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST