Membrane-packaged rectangular stranded conductor and manufacture method

Abstract

The invention discloses a membrane-packaged rectangular stranded conductor and a manufacture method. The method comprises the following steps: 1) membrane-packaged conductors are formed by packaging single circular aluminum wire with polyester film; 2) a plurality of film-packaged conductors are stranded together and shaped into rectangular sectional planes, wherein, the conductors leastways comprise two layers of many circular aluminum wires, and the length of each conductor is basically equal to resistance; 3) the stranded conductors with rectangular sectional planes are impregnated with a thermoplastic resin adhesive groove so that thermoplastic resin adhesive is full filled with apertures among each single circular aluminum wire and all the single circular aluminum wires are adhered together; 4) insulation materials are full packaged outside of the stranded conductors with rectangular sectional planes, wherein, the stranded conductors are impregnated with the thermoplastic resin adhesive groove, so that the resin adhesive is packaged; and 5) polyester non-woven fabric is selectively laid outside of the full packaged insulation materials, and the apertures among each single circular aluminum wire are filled with thermoplastic resin adhesive and solidified by baking after coiling reactor winding.

Description

technical field [0001] The invention relates to a wire for a dry-type air-core smoothing reactor coil and a preparation method thereof, in particular to a film-wrapped rectangular stranded wire and a preparation method thereof. Background technique [0002] With the continuous development of my country's power industry, the increase of large-capacity cross-regional long-distance DC transmission lines has put forward more stringent requirements for dry-type air-core smoothing reactors. Most of the existing dry-type air-core smoothing reactor coils use film-wrapped round aluminum wires or rectangular stranded wires, but when the transmission capacity is large, the harmonic components also increase accordingly. Ordinary film-wrapped round aluminum wires have a large eddy current loss , The temperature rise of the coil is very high, and in severe cases, the coil will be burned, which is not safe for the system operation. Although the rectangular stranded wire can solve the prob...

AI Technical Summary

Problems solved by technology

Most of the existing dry-type air-core smoothing reactor coils use film-wrapped round aluminum wires or rectangular stranded wires, but when the transmission capacity is large, the harmonic components also increase. Ordinary film-wrapped round aluminum wires have a large eddy current loss , the temperature rise of the coil is very high, and it will burn the coil in serious cases, which is not safe for the system operation

Although the rectangular stranded wire can solve the problem of eddy current loss caused by harmonic current, because there is air in the gap between the single wires in the rectangular stranded wire, when the voltage level is high, generally exceeding ±500kV, the air in the gap will Discharge will occur and even break down the insulation layer

And when winding, it is easy to jump wires

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