CN217214416U

CN217214416U - Spiral closed electrostatic ring, voltage regulating coil and flexible direct current transformer coil structure

Info

Publication number: CN217214416U
Application number: CN202220064758.1U
Authority: CN
Inventors: 张会敏; 李庭庭; 郭鹏鸿; 杨仁毅; 孙优良; 杨伟光; 焉媛媛; 徐富强
Original assignee: Shandong Power Transmission And Transformation Equipment Co ltd; Shandong Power Equipment Co Ltd
Current assignee: Shandong Power Transmission And Transformation Equipment Co ltd; Shandong Power Equipment Co Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-08-16
Anticipated expiration: 2032-01-11

Abstract

The utility model relates to a spiral closes a mouthful electrostatic ring and pressure regulating coil and flexible direct current transformer coil structure, spiral close a mouthful electrostatic ring including electrostatic ring skeleton, copper braid over braid, copper strand wires and insulating layer, the electrostatic ring skeleton be with single spiral turn structure external diameter matched with ring form close a mouthful structure, copper strand wires laos are bent embedded in the electrostatic ring skeleton that corresponds single spiral turn structure position department of leaving, the insulating paper is wrapped to the copper strand wires surface. The pressure regulating coil comprises a head-out fixing stay, a self-adhesive transposed conductor, an upper end part and a lower end part spiral closed electrostatic ring and an oil duct cushion block, wherein the self-adhesive transposed conductor adopts eight axial conductors and is wound to form a single spiral turn structure. The flexible direct current transformer coil structure comprises a valve side coil, a network side coil and a voltage regulating coil, wherein the valve side coil, the network side coil and the voltage regulating coil are arranged from the inside to the outside of an iron core. The utility model discloses the wholeness is good, and simple structure can reduce the circulation loss and be favorable to heat dissipation and ampere-turn balance.

Description

Spiral closed electrostatic ring, voltage regulating coil and flexible direct current transformer coil structure

Technical Field

The utility model belongs to transformer manufacture field specifically is a spiral closed electrostatic ring and pressure regulating coil and flexible direct current transformer coil structure.

Background

The flexible direct-current transmission technology is a high point in the field of power electronic technology application in the world at present, is one of the transmission technologies with highest controllability and best adaptability in the world at present, can effectively improve the quality of electric energy, ensure the safe and stable operation of a power grid, construct a high-voltage flexible direct-current transmission project and promote the optimal configuration of energy sources.

For the flexible direct current transformer, when the voltage regulating coil is arranged on the outermost side, a layered coil structure is adopted, when the number of turns of the voltage regulating coil is small, the height of the voltage regulating coil is lower than that of an internal coil, and no oil duct is arranged between turns of the layered coil, so that heat dissipation is not facilitated. The radial outgoing line has too many taps, generally two to three turns are in one level, each level in the winding process needs to cut the line and process the outgoing insulation, the process is complex, and the work period control is not facilitated. When the voltage regulating coil adopts a spiral structure, a plurality of radial parallel winding coils and two axial parallel winding coils are generally arranged in parallel, the winding method is difficult to replace, the winding difficulty is high, the circulation loss is increased, and the end ring and the electrostatic ring generally adopt an open structure, are easy to deform and are not beneficial to the field intensity of the uniform end part.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a spiral is closed and is encircleed electrostatic ring and voltage regulation coil and flexible direct current transformer coil structure. The utility model discloses the technical scheme who adopts as follows:

a spiral closed electrostatic ring for a voltage regulation coil of a single spiral turn configuration, comprising: the electrostatic ring comprises an electrostatic ring framework, a copper woven belt, a copper stranded wire and an insulating layer; static ring skeleton be with single spiral turn of wire structure external diameter matched with ring form closed structure, the shape and the high phase-match of single spiral turn of wire structure terminal surface spiral of one end of static ring skeleton, the outside of static ring skeleton is twined in proper order and is wrapped up copper braid over braid and insulating layer, copper strand wires are laos curved and are embedded in the static ring skeleton that corresponds single spiral turn of wire structure position department of going out, the insulating paper is wrapped up to the copper strand wires surface, the one end and the copper braid over braid welding of copper strand wires, the other end of copper strand wires passes copper braid over braid and the insulating layer is drawn forth.

A voltage regulating coil, which applies the spiral closed electrostatic ring, comprises: the device comprises a fixed stay at the head of the self-adhesive transposition wire, a self-adhesive transposition wire, an upper end spiral closed electrostatic ring, a lower end spiral closed electrostatic ring and an oil duct cushion block, wherein the self-adhesive transposition wire adopts eight axial wires and is wound to form a single spiral turn structure, the upper end part and the lower end part of the single spiral turn structure are respectively provided with the upper end spiral closed electrostatic ring and the lower end spiral closed electrostatic ring, the shape of one end of the upper end spiral closed electrostatic ring and one end of the lower end spiral closed electrostatic ring are matched with the spiral height of the end face of the single spiral turn structure, the upper end spiral closed electrostatic ring and the lower end spiral closed electrostatic ring are identical in structure, the oil duct cushion block is additionally arranged between the self-adhesive transposition wires, the fixed stay at the head of the self-adhesive transposition wire is arranged, and a pressure regulating coil is bound with a PET belt along the circumferential direction.

A flexible direct current transformer coil structure, uses aforementioned voltage regulation coil, includes: the valve side coil, the net side coil and the pressure regulating coil are sequentially arranged from inside to outside from the iron core.

The utility model has the advantages that:

eight wires of the single-spiral voltage regulating coil are axially arranged in a parallel winding manner, so that the lengths of all the wires are the same, and the circulating current loss can be effectively reduced; the integral height of the coil can be adjusted by adding the oil duct cushion block between turns in the height direction, so that heat dissipation and ampere-turn balance are facilitated; the axial head-out position is added with a head-out fixing stay bar, so that the short-circuit resistance of the coil is improved; the closed spiral closed electrostatic ring is adopted to enhance the anti-deformation capability, the roundness of the electrostatic ring can be effectively ensured, and the field intensity of the uniform end part is facilitated; and self-adhesive transposed conductors are adopted to enhance the short-circuit resistance of the coil. The coil has good structural integrity, simple structure and good manufacturability, and can be widely applied to the low-loss large-capacity flexible direct current transformer in the flexible direct current engineering with large unit capacity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are illustrative of some embodiments of the invention, and that those skilled in the art will be able to derive other drawings without inventive step from these drawings, which are within the scope of the present application.

Figure 1 is a schematic external view of a spiral closed electrostatic ring according to an embodiment of the present invention;

fig. 2 is a D-direction view of fig. 1 of an embodiment of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 1 in accordance with an embodiment of the present invention;

fig. 4 is a view from B-B of fig. 2 in accordance with an embodiment of the present invention;

fig. 5 is a schematic diagram of a voltage regulating coil structure according to an embodiment of the present invention;

fig. 6 is a schematic diagram of the overall structure of the coil according to the embodiment of the present invention;

in the figure, 1 is an iron core, 2 is a valve side coil, 3 is a net side coil, 4 is a pressure regulating coil, 5 is a head fixing stay, 6 is a self-adhesive transposition conducting wire, 7 is an upper end spiral closed electrostatic ring, 8 is a lower end spiral closed electrostatic ring, 9 is an oil duct cushion block, 10 is an electrostatic ring framework, 11 is a copper braid, 12 is a copper stranded wire, and 13 is an insulating layer.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

Fig. 1 is a schematic diagram showing an external shape of a spiral closed electrostatic ring according to an embodiment of the present invention; as shown in fig. 2, it is a view from direction D of fig. 1 according to the embodiment of the present invention. A spiral closed electrostatic ring for a voltage regulation coil of a single spiral turn configuration, comprising: the electrostatic ring comprises an electrostatic ring framework 10, a copper braided belt 11, a copper stranded wire 12 and an insulating layer 13. The electrostatic ring framework 10 is of a circular closed structure matched with the outer diameter of the single-spiral turn structure, the shape of one end of the electrostatic ring framework 10 is matched with the spiral height of the end face of the single-spiral turn structure, the outer side of the electrostatic ring framework 10 is sequentially wound and wrapped with a copper woven belt 11 and an insulating layer 13, the electrostatic ring framework 10 is made of laminated paper boards, and the insulating layer 13 is made of heat-resistant crepe paper. The electrostatic ring framework 10 determines the appearance of the electrostatic ring, so that the electrostatic ring can bear the press-mounting force; the electrostatic ring framework 10 adopts a mode that the upper end surface is horizontal, the lower end surface is matched with the spiral height of the upper surface of the single spiral turn structure, so that the generation of sharp angles caused by unequal distances between the lower surface of the electrostatic ring and the upper surface of the single spiral turn structure is avoided, and the distribution of electric fields at the end parts of the coil is effectively improved. The radial cross section of static ring skeleton 10 is the rectangle, and rectangle bight all sets up to the fillet, and the even winding of the half lap of copper braid over braid 11 is on static ring skeleton 10, and the winding of the half lap of insulating layer 13 is outside at copper braid over braid 11.

As shown in fig. 3, which is a sectional view taken along the line a-a of fig. 1 according to the embodiment of the present invention; as shown in fig. 4, it is a diagram of an embodiment of the present invention2 in the direction B-B. Copper strands 12 are bent and embedded in the electrostatic ring framework 10 corresponding to the leading-out position of the voltage regulating coil, one end of each copper strand 12 is welded with the copper braided belt 11, and the other end of each copper strand 12 penetrates through the copper braided belt 11 and the insulating layer 13 to be led out and is connected with the first turn of wire cake at the end part of the single-spiral turn structure. The copper stranded wire 12 has a cross section of 4mm ² The outer surface of the copper stranded wire 12 is wrapped with insulating paper, the copper stranded wire 12 is taken as an electrostatic ring outlet after going out of the electrostatic ring framework 10 and is connected with a single-spiral turn structure outlet, and the outer surface of the copper stranded wire 12 after going out of the electrostatic ring framework 10 is also wrapped with the insulating paper. Copper braid over

braid

11 and 12 low silver brazes of copper strand wires, and the welding is accomplished the back, and insulating paper is wrapped to 12 surfaces of copper strand wires, and the smooth transition of laos bend has avoided the problem that copper strand wires 12 are broken, and the curved triangle area of laos is filled with insulating material, and the surface that is located the inside of electrostatic ring skeleton 10 and outside copper strand wires 12 all wraps insulating paper to need the insulation to wrap closely reality.

As shown in fig. 5, it is a schematic diagram of a voltage regulating coil structure according to an embodiment of the present invention. A voltage regulation coil, use the aforesaid spiral closed electrostatic ring, the voltage regulation coil 4 includes: the device comprises a head-out fixing stay 5, a self-adhesive transposition lead 6, an upper end part spiral closed electrostatic ring 7, a lower end part spiral closed electrostatic ring 8 and an oil duct cushion block 9. The self-adhesive transposed conductor 6 adopts eight axial conductors and is wound to form a single-spiral turn structure, the conductors are wound in parallel without radiation, the lengths of all the conductors are ensured to be the same, the circulation loss is effectively reduced, and the short-circuit resistance of the coil is enhanced by adopting the self-adhesive transposed conductor. The upper end and the lower end of the single-spiral turn structure are provided with spiral heights, the upper end and the lower end of the single-spiral turn structure are respectively provided with an upper end spiral closed electrostatic ring 7 and a lower end spiral closed electrostatic ring 8, the upper end spiral closed electrostatic ring 7 and the lower end spiral closed electrostatic ring 8 are identical in structure and opposite in assembling direction; the spiral closed electrostatic ring comprises: static ring skeleton, copper braid over braid and copper strand wires carry out low silver brazing at static ring skeleton external diameter side, the welding back copper strand wires lead static ring skeleton surface after encircleing through static ring skeleton trompil, be favorable to the transition of copper strand wires like this, can prevent that the welding department from being broken, three horn areas have been eliminated with the wire spiral height phase-match of single spiral turn structure to the breach of static ring skeleton one side, adopt spiral closed static ring to level up single spiral turn structure tip, the uneven possibility of taking place to discharge because of electric field distribution has significantly reduced, adopt the closed structure can effectively avoid the electric field shielding problem of static ring odd opening part, strengthen its anti-deformation ability. An oil duct cushion block 9 is additionally arranged between the self-adhesive transposed conductors 6 and used for adjusting the height of the coil and forming an oil duct, so that ampere-turn balance and heat dissipation are facilitated; a head outlet fixing stay bar 5 is arranged at the head outlet of the self-adhesive transposition wire 6, and is bound and fixed by a PET (polyethylene terephthalate) belt along the circumferential direction of the coil, so that the short-circuit resistance and the strength of the coil are improved. One of the self-adhesive transposition wires 6 is connected with the copper stranded wire, the voltage regulating coil 4 is connected with the lead wire and the network side coil 3 according to drawing marks after being led out, and is finally connected with the switch, and the wiring modes are the prior art and are not described again.

As shown in fig. 6, it is a schematic diagram of the overall structure of the coil according to the embodiment of the present invention. A flexible direct current transformer coil structure, uses aforementioned voltage regulation coil, includes: the valve side coil 2, the net side coil 3 and the voltage regulating coil 4 are sequentially arranged from inside to outside from the iron core 1, and the flexible direct current transformer coil integral structure is formed.

Finally, it should be noted that: the above embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. Spiral closed electrostatic ring, its characterized in that, a voltage regulation coil that is used for single spiral turn structure includes: the electrostatic ring comprises an electrostatic ring framework (10), a copper braided belt (11), a copper stranded wire (12) and an insulating layer (13); static ring skeleton (10) be with single spiral turn structure external diameter matched with ring form closed structure, the shape of the one end of static ring skeleton (10) and single spiral turn structure terminal surface spiral height phase-match, the outside of static ring skeleton (10) twines in proper order and wraps copper braid strip (11) and insulating layer (13), copper strand wires (12) are bent and are embedded in static ring skeleton (10) of corresponding single spiral turn structure department of giving first place, insulating paper is wrapped up to copper strand wires (12) surface, the one end and the welding of copper braid strip (11) of copper strand wires (12), the other end of copper strand wires (12) passes copper braid strip (11) and insulating layer (13) are drawn forth.

2. The spiral closed electrostatic ring as claimed in claim 1, wherein the electrostatic ring framework (10) is made of laminated paper board, and the insulating layer (13) is made of heat-resistant crepe paper.

3. The spiral closed electrostatic ring according to claim 1, wherein the radial cross-section of the electrostatic ring skeleton (10) is rectangular, and the corners of the rectangle are rounded.

4. The spiral closed electrostatic ring according to claim 1, wherein the copper woven belt (11) is wound on the electrostatic ring framework (10) in a half-lap mode, and the insulating layer (13) is wound outside the copper woven belt (11) in a half-lap mode.

5. The closed spiral electrostatic ring of claim 1 wherein the copper strands (12) are 4mm in cross-section ² The bare copper conductor is characterized in that the outer surfaces of copper stranded wires (12) positioned inside and outside the electrostatic ring framework (10) are wrapped with insulating paper.

6. The helical closed electrostatic ring of claim 1 wherein the copper braid (11) is low silver brazed to the copper strands (12).

7. The electrostatic ring of claim 6, wherein the bends of the copper strands (12) are rounded, and the corners of the bends are filled with an insulating material.

8. The voltage-regulating coil, characterized by applying the spiral closed electrostatic ring of claim 1, comprising: a head-outlet fixing stay (5), a self-adhesive transposition lead (6), an upper end spiral closed electrostatic ring (7), a lower end spiral closed electrostatic ring (8) and an oil duct cushion block (9), wherein the self-adhesive transposition lead (6) adopts eight axial leads and is wound to form a single spiral turn structure, the upper end part and the lower end part of the single spiral turn structure are respectively provided with the upper end spiral closed electrostatic ring (7) and the lower end spiral closed electrostatic ring (8), the shapes of one ends of the upper end spiral closed electrostatic ring (7) and the lower end spiral closed electrostatic ring (8) are matched with the spiral height of the end surface of the single spiral turn structure, the upper end spiral closed electrostatic ring (7) and the lower end spiral closed electrostatic ring (8) have the same structure, the oil duct cushion block (9) is additionally arranged between the self-adhesive transposition leads (6), the head-outlet fixing stay (5) is arranged at the head-outlet position of the self-adhesive transposition lead (6), the pressure regulating coil (4) is used for binding a PET belt along the circumferential direction.

9. Flexible direct current transformer coil structure, characterized in that the use of a regulating coil according to claim 8, comprises: the valve side coil (2), the net side coil (3) and the pressure regulating coil (4) are sequentially arranged from inside to outside from the iron core (1).