A low-high-high voltage transformer winding structure and transformer

Abstract

The application provides a low-high-high voltage transformer winding structure, which comprises a low-voltage winding, an inner high-voltage winding and an outer high-voltage winding arranged from inside to outside, wherein the inner high-voltage winding and the outer high-voltage winding each comprise an upper branch of the inner high-voltage winding, a lower branch of the inner high-voltage winding, an upper branch of the outer high-voltage winding and a lower branch of the outer high-voltage winding. The high-voltage winding of the transformer is split into the inner high-voltage winding and the outer high-voltage winding, and the outer high-voltage winding and the inner high-voltage winding are each connected in parallel by the upper and lower branches; the upper branch of the inner high-voltage winding is connected with the upper branch of the outer high-voltage winding, and the lower branch of the inner high-voltage winding is connected with the lower branch of the outer high-voltage winding. The low-high-high winding arrangement provided by the application can reduce the winding reactance value or the winding reactance height of the transformer, and meanwhile, the winding material usage is not increased but even reduced.

Description

Technical Field

[0001] This invention belongs to the field of power system equipment manufacturing and transformer technology, and particularly relates to a low-voltage, high-voltage transformer winding structure. Background Technology

[0002] In traditional power transformer design, the high-voltage winding can be split into an inner high-voltage winding and an outer high-voltage impedance to form a high-low-high winding arrangement, thereby reducing the transformer's short-circuit impedance or lowering the winding reactance height. However, for high-voltage power transformers, the high-low-high winding arrangement will significantly increase the amount of winding material used. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a technical solution for a low-voltage, high-voltage transformer winding structure and a transformer.

[0004] The first aspect of this invention discloses a low-voltage, high-voltage transformer winding structure; comprising:

[0005] A low-voltage winding, an inner high-voltage winding, and an outer high-voltage winding arranged from the inside to the outside, characterized in that the inner high-voltage winding and the outer high-voltage winding respectively include an upper branch of the inner high-voltage winding, a lower branch of the inner high-voltage winding, an upper branch of the outer high-voltage winding, and a lower branch of the outer high-voltage winding.

[0006] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the upper branch of the inner high-voltage winding and the lower branch of the inner high-voltage winding are in parallel.

[0007] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the upper branch of the external high-voltage winding and the lower branch of the external high-voltage winding are in parallel.

[0008] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the connection method of the upper branch of the inner high-voltage winding, the lower branch of the inner high-voltage winding, the upper branch of the outer high-voltage winding, and the lower branch of the outer high-voltage winding is specifically as follows: one end of the upper branch of the inner high-voltage winding is provided with a high-voltage terminal lead-out line, and the other end is connected to one end of the upper branch of the outer high-voltage winding; the other end of the upper branch of the outer high-voltage winding is connected to the high-voltage head-out line of the upper branch of the outer high-voltage winding; one end of the lower branch of the inner high-voltage winding is provided with a high-voltage terminal lead-out line, and the other end is connected to one end of the lower branch of the outer high-voltage winding; the other end of the lower branch of the outer high-voltage winding is connected to the high-voltage head-out line of the lower branch of the outer high-voltage winding; the high-voltage head-out line of the upper branch of the outer high-voltage winding is connected to the high-voltage head-out line of the lower branch of the outer high-voltage winding.

[0009] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the upper branch of the inner high-voltage winding and the lower branch of the inner high-voltage winding are separated by a certain distance in the axial direction.

[0010] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the ratio of the number of turns of the inner high-voltage winding to the number of turns of the outer high-voltage winding can be arbitrarily adjusted as needed.

[0011] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the number of turns of the upper branch of the inner high-voltage winding and the lower branch of the inner high-voltage winding are the same.

[0012] According to the low-high-voltage transformer winding structure of the first aspect of the present invention, the number of turns of the upper branch of the external high-voltage winding and the lower branch of the external high-voltage winding are the same.

[0013] The second aspect of the present invention discloses a transformer, the transformer comprising the low-voltage, high-voltage transformer winding structure described in any one of the first aspects of the present invention.

[0014] As can be seen, the proposed solution of this invention splits the transformer high-voltage winding into an inner high-voltage winding and an outer high-voltage winding. Both the outer high-voltage winding and the inner high-voltage winding adopt two parallel branches, one upper and one lower. The upper branch of the inner high-voltage winding is connected to the upper branch of the outer high-voltage winding, and the lower branch of the inner high-voltage winding is connected to the lower branch of the outer high-voltage winding, thus providing a new low-high-high winding arrangement.

[0015] In summary, the solution proposed in this invention can reduce the transformer winding reactance value or reduce the winding reactance height, while not increasing or even reducing the amount of winding material used. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a diagram of a low-voltage, high-voltage transformer winding structure according to an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The first aspect of this invention discloses a low-voltage, high-voltage transformer winding structure. Figure 1 This is a diagram illustrating the winding structure of a low-voltage, high-voltage transformer according to an embodiment of the present invention. Figure 1 As shown, the winding structure includes:

[0020] The low-voltage winding 1, the inner high-voltage winding, and the outer high-voltage winding are arranged from the inside to the outside. The inner high-voltage winding and the outer high-voltage winding respectively include the upper branch 2 and the lower branch 7 of the inner high-voltage winding, and the upper branch 4 and the lower branch 6 of the outer high-voltage winding.

[0021] In some embodiments, the high-voltage winding of the high-voltage power transformer is split into an inner high-voltage winding and an outer high-voltage winding. Both the outer and inner high-voltage windings are connected in parallel with upper and lower branches. The upper branch of the inner high-voltage winding is connected to the upper branch of the outer high-voltage winding, and the lower branch of the inner high-voltage winding is connected to the lower branch of the outer high-voltage winding. The upper and lower branches of the inner high-voltage winding are separated by a certain distance in the middle to ensure sufficient insulation safety margin with respect to the high field strength region in the middle of the high-voltage winding. The low-voltage winding, the inner high-voltage winding, and the outer high-voltage winding are arranged from the inside to the outside, forming a low-high-high winding arrangement.

[0022] Specifically, the upper branch 2 of the inner high-voltage winding and the lower branch 7 of the inner high-voltage winding are connected in parallel.

[0023] Specifically, the upper branch 4 of the external high-voltage winding and the lower branch 6 of the external high-voltage winding are connected in parallel.

[0024] In some embodiments, one end of the upper branch 2 of the inner high-voltage winding is connected to the upper branch 4 of the outer high-voltage winding, and the other end of the upper branch 2 of the inner high-voltage winding is connected to the high-voltage end outlet 3. One end of the lower branch 7 of the inner high-voltage winding is connected to the lower branch 6 of the outer high-voltage winding, and the other end of the lower branch 7 of the inner high-voltage winding is connected to the high-voltage end outlet 3. The high-voltage start outlet 5 is connected to the upper branch 4 of the outer high-voltage winding and the lower branch 6 of the outer high-voltage winding.

[0025] Specifically, the connection method of the inner high-voltage winding upper branch 2, inner high-voltage winding lower branch 7, outer high-voltage winding upper branch 4, and outer high-voltage winding lower branch 6 is as follows: one end of the inner high-voltage winding upper branch 2 is provided with an inner high-voltage winding upper branch high-voltage end lead-out line 31, and the other end is connected to one end of the outer high-voltage winding upper branch 4; the other end of the outer high-voltage winding upper branch 4 is connected to the outer high-voltage winding upper branch high-voltage start-end lead-out line 51; one end of the inner high-voltage winding lower branch 7 is provided with an inner high-voltage winding lower branch high-voltage end lead-out line 32, and the other end is connected to one end of the outer high-voltage winding lower branch 6; the other end of the outer high-voltage winding lower branch 6 is connected to the outer high-voltage winding lower branch high-voltage start-end lead-out line 52; the outer high-voltage winding upper branch high-voltage start-end lead-out line 51 is connected to the outer high-voltage winding lower branch high-voltage start-end lead-out line 52.

[0026] Specifically, the ratio of the number of turns in the inner high-voltage winding to that in the outer high-voltage winding can be adjusted arbitrarily as needed.

[0027] Specifically, the number of turns in the upper branch 2 and the lower branch 7 of the inner high-voltage winding are the same.

[0028] Specifically, the number of turns in the upper branch 4 and the lower branch 6 of the external high-voltage winding are the same.

[0029] In summary, the solution proposed in this invention provides a new low-high-high winding arrangement that can reduce the transformer winding reactance value or reduce the winding reactance height, while not increasing or even reducing the amount of winding material used.

[0030] The second aspect of the present invention discloses a transformer, including the low-high-voltage transformer winding structure as described in any one of the embodiments of the first aspect of the present invention, having all the beneficial effects of the low-high-voltage transformer winding structure in any one of the embodiments of the first aspect of the present invention.

[0031] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A low-voltage, high-voltage transformer winding structure, comprising a low-voltage winding, an inner high-voltage winding, and an outer high-voltage winding arranged from the inside out, characterized in that, The inner high-voltage winding and the outer high-voltage winding each include an upper branch and a lower branch of the inner high-voltage winding, and an upper branch and a lower branch of the outer high-voltage winding; the upper branch and the lower branch of the inner high-voltage winding are in parallel; the upper branch and the lower branch of the outer high-voltage winding are in parallel. The connection method of the upper branch of the inner high-voltage winding, the lower branch of the inner high-voltage winding, the upper branch of the outer high-voltage winding, and the lower branch of the outer high-voltage winding is as follows: one end of the upper branch of the inner high-voltage winding is provided with a high-voltage end lead-out line, and the other end is connected to one end of the upper branch of the outer high-voltage winding; the other end of the upper branch of the outer high-voltage winding is connected to the high-voltage beginning lead-out line of the upper branch of the outer high-voltage winding; one end of the lower branch of the inner high-voltage winding is provided with a high-voltage end lead-out line, and the other end is connected to one end of the lower branch of the outer high-voltage winding; the other end of the lower branch of the outer high-voltage winding is connected to the high-voltage beginning lead-out line of the lower branch of the outer high-voltage winding; the high-voltage beginning lead-out line of the upper branch of the outer high-voltage winding is connected to the high-voltage beginning lead-out line of the lower branch of the outer high-voltage winding; the upper branch of the inner high-voltage winding and the lower branch of the inner high-voltage winding are separated by a certain distance in the axial direction. The other end of the upper branch of the inner high-voltage winding is connected to the high-voltage terminal output line, one end of the lower branch of the inner high-voltage winding is connected to the lower branch of the outer high-voltage winding, and the other end of the lower branch of the inner high-voltage winding is connected to the high-voltage terminal output line.

2. The low-voltage high-voltage transformer winding structure according to claim 1, characterized in that, The ratio of the number of turns in the inner high-voltage winding to that in the outer high-voltage winding can be adjusted arbitrarily as needed.

3. The low-voltage high-voltage transformer winding structure according to claim 2, characterized in that, The upper branch of the inner high-voltage winding and the lower branch of the inner high-voltage winding have the same number of turns.

4. The low-voltage high-voltage transformer winding structure according to claim 3, characterized in that, The upper branch and lower branch of the external high-voltage winding have the same number of turns.

5. A transformer, characterized in that, Including the low-voltage, high-voltage transformer winding structure as described in any one of claims 1 to 4.

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