CN204215744U - Glass fibre mixes ribbon impregnating resin and makees the transposed conductor insulated - Google Patents

Abstract

The utility model relates to the field of super- and ultra-high-voltage electrical manufacturing, in particular to a transposition wire for insulating glass fiber mixed ribbon impregnated with resin. It includes a multi-layered transposition conductor strip composed of a plurality of single-strand round aluminum wires, the single-strand round aluminum wire is covered with an insulating film wrapping layer; the transposition conductor strip is coated with a composite film insulation layer, and the composite film insulation layer is covered with a layer of glass fiber mixed woven tape. Improve the withstand voltage level of this product. And the outermost layer of glass fiber mixed ribbon layer makes the wire better airtight, and moisture and impurities are not easy to enter the wire, which greatly improves the electrical performance of the reactor and reduces the probability of inter-turn short circuit. After testing, the utility model has an average withstand voltage of more than 10,000V and a breakdown voltage of more than 26,000V, and is suitable for ultra-high voltage and ultra-high voltage fields.

Description

Glass fiber blended tape impregnated with resin for insulated transposition wire

technical field

The utility model relates to the field of super- and ultra-high-voltage electrical manufacturing, in particular to a transposition wire for insulating glass fiber mixed ribbon impregnated with resin.

Background technique

In ultra-high voltage and ultra-high voltage power transmission and transformation projects, various types of reactors and windings of electrical appliances must withstand extremely high voltages and very high currents. At the same time, it is also necessary to consider reducing the loss of electric energy.

The dry-type reactor coils used in the power grid are traditionally used to wrap round aluminum wires with multiple single-strand films. Since the coil diameter of the dry-type reactor is large and the number of turns is large, the length of the wire required is as long as several kilometers. In such a coil with multiple wires wound in parallel, after winding multiple layers, the length and resistance of each wire will vary greatly. In this way, the leakage flux generated during operation will generate a circulating current in the wire, resulting in a large power loss. In addition to the limitation that the aluminum wire itself has impurities and defects that are not easy to remove, generally the reactor made of aluminum wire is only used for small-capacity reactors on the power grid less than 35kV, and cannot be used in the ultra-high voltage and ultra-high voltage fields.

Some dry-type reactor coils use multiple round aluminum bare wires to form a rectangle, and the outer layer wraps the inner insulating layer, insulating layer and composite film outer insulating layer in turn. This kind of wire-wound reactor is only suitable for ordinary high-voltage power grids, and there will still be circulating currents in the wires during operation to form eddy current losses.

In recent years, dry-type reactor coils adopt a parallel structure of multi-encapsulated multi-strand transposed wires. During the winding process of the coils, several layers of glass fibers are wound on the inside and outside of the wires. This structure is to ensure the tightness of the coil and prevent the entry of moisture and impurities to affect the electrical performance of the coil. A special compound needs to be added to the lead-out part of the wire from the package to ensure that there is no gap between the lead-out part of the wire and the package to prevent the entry of moisture and impurities to affect the electrical performance of the coil. And because of the current winding process of the coil, the epoxy-impregnated glass fiber wrapping the wire is five-ply yarn or seven-ply yarn wound on the inner and outer surfaces of the wire. The airtightness of the sealed structure. In recent years, most of the frequent inter-turn short circuits of dry-type air-core reactors are caused by the lack of airtightness caused by this process, which allows water vapor to enter the coil.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the above-mentioned technologies, and provide a kind of transposition wire with glass fiber mixed ribbon impregnated with resin as insulation. Using this product to wind a reactor coil can greatly improve the electrical performance of the product and provide a reliable solution. Dry-type air-core reactor glass fiber mixed ribbon impregnated with resin is used for insulating the transposition wire sealing problem, especially in the case of ultra-high voltage, ultra-high voltage and high current.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a glass fiber mixed woven tape impregnated with resin for insulating transposition wire, which is characterized in that it includes a multi-layered transposition wire composed of a plurality of single-strand round aluminum wires , the single-strand round aluminum wire is covered with an insulating film wrapping layer; the transposed wire is covered with a composite film insulating layer, and the composite film insulating layer is covered with a glass fiber mixed ribbon layer.

Preferably, the composite film insulating layer is made of a polyester resin film and a polyimide film, and is wrapped with a layer of polyester resin film, a layer of polyimide film and a layer of polyester resin film. The package rate is 10-90%.

Preferably, the insulating film wrapping layer and the glass fiber mixed woven tape layer are wrapped in a spiral shape with 10%-90% stacking respectively.

Preferably, the glass fiber mixed tape layer is glass fiber non-woven fabric impregnated with resin.

Preferably, the insulating film wrapping layer is polyester film, and the wrapping rate is 10-90%.

Preferably, the cross-section of the transposition wire strip is square.

The beneficial effects of the utility model are: the utility model adopts many defect-free single-strand round aluminum wires with insulating film wrapping layers, which are combined into a multi-layer transposition wire belt through transposition, wherein each round aluminum wire is insulated from each other . The composite film insulation layer is coated on the outside of the transposition conductor belt, and the glass fiber mixed ribbon layer is coated on the outside of the composite film insulation layer, which improves the withstand voltage level of this product. And the outermost layer of glass fiber mixed ribbon layer makes the wire better airtight, and moisture and impurities are not easy to enter the wire, which greatly improves the electrical performance of the reactor and reduces the probability of inter-turn short circuit. After testing, the multi-layer transposed aluminum wire of the invention has an average withstand voltage of over 10,000V and a breakdown voltage of over 26,000V, and is suitable for ultra-high voltage and ultra-high voltage fields.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings and preferred embodiments. As shown in Figure 1, taking the winding wire suitable for UHV reactors as an example, it includes an insulating film wrapping layer 2, a single strand of round aluminum Wire 1, composite film insulation layer 3 and glass fiber mixed ribbon layer 4; multiple defect-free single-strand round aluminum wires 1 with insulation film wrapping layer 2 constitute a multi-layered rectangular transposition wire; the composite film insulation Layer 3 is a wrapping layer of three different insulating films; the glass fiber mixed woven tape layer 4 is a wrapping layer with glass fiber mixed woven tape. The three-layer composite film insulation layer is wrapped on the outside of the rectangular transposition conductor belt, and the glass fiber mixed woven tape layer is wrapped on the outside of the composite film insulation layer.

In the transposition conductor tape, the insulating film wrapping layer is polyester film, and the wrapping rate is 10-90%.

The insulating layer of the composite film is made of polyester resin film and polyimide film, and is wrapped and covered with one layer of polyester resin film, one layer of polyimide film and one layer of polyester resin film. 10-90%.

After the product is made, it needs to go through online high-voltage real-time monitoring and real-time monitoring of short circuit and grounding between lines. After the quality of the product is confirmed, it is pulled by the constant tension wire take-up machine and the overall wire arranging machine to receive it on the bobbin.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (6)

1. glass fibre mixes ribbon impregnating resin and makees the transposed conductor insulated, and it is characterized in that: the transposed conductor comprising the multilayer arrangement be made up of many sub-thread circle aluminum steels, and described sub-thread circle aluminum steel is coated with insulation film lapping layer; Described transposed conductor is coated with laminated film insulating barrier, and described laminated film insulating barrier is coated with glass fibre and mixes ribbon layer.

2. glass fibre according to claim 1 mixes ribbon impregnating resin and makees the transposed conductor insulated, it is characterized in that: described laminated film insulating barrier adopts polyester resin film and polyimide film, carry out stacked package with one deck polyester resin film, one deck polyimide film and one deck polyester resin film coated, packet stack rate is 10-90%.

3. glass fibre according to claim 2 mixes ribbon impregnating resin and makees the transposed conductor insulated, and it is characterized in that: described insulation film lapping layer and glass fibre mix ribbon layer and adopt the stacked helical form of 10%-90% wrapped respectively.

4. glass fibre according to claim 3 mixes ribbon impregnating resin and makees the transposed conductor insulated, and it is characterized in that: described glass fibre mixes the glass fibre non-woven that ribbon layer is impregnating resin.

5. glass fibre according to claim 4 mixes ribbon impregnating resin and makees the transposed conductor insulated, and it is characterized in that: described insulation film lapping layer is polyester film, and packet stack rate is 10-90%.

6. glass fibre according to claim 5 mixes ribbon impregnating resin and makees the transposed conductor insulated, and it is characterized in that: the cross section of described transposed conductor band is square.