Novel 12-pulse-wave double-reverse-star rectifier transformer low-voltage outgoing line mode with balancing reactor

Abstract

The utility model provides a novel 12-pulse-wave double-reverse-star rectifier transformer low-voltage outgoing line mode with a balance reactor, which comprises a framework for outgoing lines on three surfaces of a transformer oil tank of the rectifier transformer, and the three surfaces are two wide surfaces and a narrow surface respectively; the two wide surfaces are low-voltage valve measuring lines, the narrow surface is a low-voltage 0-phase outgoing line, and the low-voltage valve measuring lines can be connected with a rectifier cabinet; the low-pressure valve measuring line is divided into an a phase, a b phase and a c phase, and the a phase, the b phase and the c phase are arranged from top to bottom; and the low-voltage 0 phase is lined up on the narrow surface of the transformer to form a row of outgoing lines. The stray loss of the transformer is reduced, the efficiency of the transformer is improved, and the energy-saving effect is achieved; the loss of the connecting copper bar is reduced, the system efficiency is improved, and the material cost of the copper bar is reduced; connecting copper bars between the transformer and the rectifier are simplified, and installation and maintenance are easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of the low-voltage outgoing line mode of a rectifier transformer with a double reverse star and a balance reactor, in particular to a novel low-voltage outgoing line mode of a 12-pulse double reverse star rectifier transformer with a balance reactor. Background Art

[0002] The copper bars on the low-voltage side of the existing 12-pulse double reverse star rectifier transformer with a large current and a balance reactor usually adopt the following outgoing line mode: adopting a non-phase-inverse parallel centralized single-row outgoing line mode.

[0003] The following deficiencies exist in this solution:

[0004] 1. The current-carrying capacity of a single copper bar is large. Due to centralized outgoing lines, the magnetic field and electric field are relatively concentrated, and the copper bar generates a large amount of heat, which easily causes the aging of the copper bar sealing glue and oil leakage.

[0005] 2. The magnetic field of the single-row outgoing line is too concentrated and the heat generation is too serious.

[0006] 3. The connecting mother copper bar between the transformer and the rectifier needs to be bent, and the installation is relatively complex. It cannot shorten the distance between the rectifier cabinets of the rectifier transformer, and the connecting copper bar is relatively long. Content of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a novel low-voltage outgoing line mode of a 12-pulse double reverse star rectifier transformer with a balance reactor, which reduces the stray losses of the transformer, improves the efficiency of the transformer, and achieves an energy-saving effect; reduces the losses of the connecting copper bar, improves the system efficiency, and reduces the material cost of the copper bar; simplifies the connecting copper bar between the transformer and the rectifier, and is convenient for installation and maintenance.

[0008] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0009] A novel low-voltage outgoing line mode of a 12-pulse double reverse star rectifier transformer with a balance reactor of the utility model includes a framework for outgoing lines on three surfaces of the transformer oil tank of the rectifier transformer. The three surfaces are two wide surfaces and one narrow surface respectively; the two wide surfaces are for low-voltage valve side outgoing lines, and the narrow surface is for low-voltage phase 0 outgoing lines. The low-voltage valve side outgoing lines can be connected to the rectifier cabinet; the low-voltage valve side outgoing lines are divided into phase a, phase b, and phase c, and phase a, phase b, and phase c are arranged in the upper, middle, and lower positions; the low-voltage phase 0 outgoing lines are arranged on the narrow surface of the transformer in a single row, forming a single-row outgoing line, which is convenient for the parallel connection of phase 0 copper bars and shortens the connecting copper bar with the load end.

[0010] Preferably, the low-voltage valve side outgoing lines are connected to the rectifier cabinet through low-voltage valve side copper bars for outgoing lines respectively arranged on the two wide surfaces.

[0011] Preferably, the low-voltage phase 0 outgoing line is led out through a low-voltage phase 0 outgoing copper row arranged on the narrow surface.

[0012] Preferably, the low-voltage valve measurement outgoing copper rows on the two wide surfaces are led out in a symmetrical structure.

[0013] Preferably, the low-voltage phase 0 outgoing copper rows on the narrow surface are led out centrally and are connected in parallel.

[0014] Preferably, the distance between the low-voltage valve measurement outgoing copper rows of each phase is greater than 600 mm.

[0015] Preferably, the low-voltage phase 0 outgoing copper rows of each phase are arranged in a row to form a single-row outgoing line.

[0016] Preferably, the minimum distance between the rectifier transformer and the rectifier cabinet is greater than 800 mm.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. The present utility model further reduces the heat generation of the iron materials around the transformer oil tank and the outgoing copper rows, reduces the stray losses of the transformer, improves the transformer efficiency, and achieves an energy-saving effect.

[0019] 2. The present utility model enables the distance of the connecting copper rows between the low voltage of the transformer and the rectifier to be shortened, and the connecting copper rows between the low-voltage phase 0 copper row and the load end can be shortened, reducing the losses of the connecting copper rows, improving the system efficiency, and reducing the material cost of the copper rows.

[0020] 3. The present utility model simplifies the connecting copper rows between the transformer and the rectifier, and is convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a structural diagram of the low-voltage outgoing line mode of a 12-pulse double reverse star rectifier transformer with a balance reactor in the prior art of the present utility model.

[0023] Figure 2 is a structural diagram of the low-voltage outgoing line mode of a novel 12-pulse double reverse star rectifier transformer with a balance reactor in an embodiment of the present utility model.

[0024] Figure 3 is Figure 2 a side view of the rectifier transformer when the rectifier cabinet is not connected.

[0025] Figure 4 is Figure 2 the left view of

[0026] In the figure: 1. Rectifier transformer; 2. Low-voltage phase 0 copper busbar; 3. Low-voltage valve-side outgoing copper busbar; 4. Rectifier cabinet. Specific embodiments

[0027] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0028] The following uses specific specific examples to illustrate the implementation manners of the disclosure of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The present utility model can also be implemented or applied through other different specific implementation manners. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without making creative efforts belong to the scope protected by the present disclosure.

[0029] As Figure 1 shown, the prior art adopts a non-phase-inverse parallel centralized one-row outgoing line method. It has the following deficiencies:

[0030] 1. The current-carrying capacity of a single copper busbar is large. Due to the centralized outgoing line, the magnetic field and electric field are relatively concentrated, and the copper busbar generates a large amount of heat, which is likely to cause the aging and oil leakage of the copper busbar sealant.

[0031] 2. The magnetic field of the low-voltage AC copper busbar in a one-row outgoing line is too concentrated, and the heat generation is too serious.

[0032] 3. The connecting mother copper busbar between the transformer and the rectifier needs to be bent, the installation is relatively complicated, the distance between the rectifier transformer and the rectifier cabinet cannot be shortened, and the connecting copper busbar is relatively long.

[0033] As Figure 2 , Figure 3 , Figure 4 shown, a novel 12-pulse double-star rectifier transformer with a balance reactor low-voltage outgoing line method in this embodiment includes a framework that takes out lines from three surfaces of the transformer oil tank of the rectifier transformer 1. The three surfaces are two wide surfaces and one narrow surface respectively; the two wide surfaces are for low-voltage valve-side outgoing lines, and the narrow surface is for low-voltage phase 0 outgoing lines. The low-voltage valve-side outgoing lines can be connected to the rectifier cabinet. The low-voltage valve-side outgoing lines are divided into phase a, phase b, and phase c, and phase a, phase b, and phase c are arranged vertically. The low-voltage phase 0 outgoing copper busbars are arranged in a row to form 1 row and can be connected in parallel.

[0034] The outgoing line of the low-voltage valve measurement passes through the copper bars 3 for the outgoing line of the low-voltage valve measurement respectively arranged on two wide surfaces and is connected to the rectifier cabinet. The outgoing line of the low-voltage phase 0 passes through the copper bar 2 for the outgoing line of the low-voltage phase 0 arranged on the narrow surface.

[0035] The copper bars 3 for the outgoing line of the low-voltage valve measurement on the two wide surfaces are led out in a symmetrical structure. The copper bar 2 for the outgoing line of the low-voltage phase 0 on the narrow surface is centrally led out and is connected by parallel wiring.

[0036] The distance between the copper bars 3 for the outgoing line of the low-voltage valve measurement of each phase is greater than 600 mm. There is no requirement for the distance between the copper bars 2 for the outgoing line of the low-voltage phase 0 of each phase, and it is only necessary to ensure that the mechanical distance is convenient for wiring. The minimum distance between the rectifier transformer 1 and the rectifier cabinet 4 is greater than 800 mm.

[0037] One ZHSFPTK-25000 / 35 in this embodiment adopts a double reverse star rectifier transformer with a balance reactor, with a DC output current of 200,000 amperes. It adopts non-phase-inverse parallel three-surface outgoing lines. The two wide surfaces are connected to two rectifiers, each outputting 100,000 amperes of current. The narrow surface is the outgoing line of the low-voltage phase 0, and a total of 200,000 amperes of current are connected in parallel.

[0038] The working principle of the embodiment of the present utility model is as follows:

[0039] 1. This technology is applicable to a double reverse star rectifier transformer with a balance reactor, and the outgoing line method is non-phase-inverse parallel. 2. The two surfaces of the valve side of this technology transformer are led out, and the valve side abc busbars are led out in an upper-middle-lower three-layer structure. On both sides of the rectifier transformer, after rectification, it supplies power to the positive electrode of the load. 3. The phase 0 of the valve side is centrally led out on the narrow surface of the transformer and can be connected in parallel directly to the negative electrode of the load to form a complete circuit loop.

[0040] For the double reverse star rectifier transformer with a balance reactor in the embodiment of the present utility model, the low-voltage valve side copper bars are led out on the two wide surfaces of the transformer. The valve side abc three phases are divided into three layers from top to bottom. The rectifiers are placed on both sides of the wide surface of the transformer. After rectification by the rectifiers, the alternating current becomes direct current and supplies power to the positive electrode of the load. The transformer and the rectifier copper bars are directly connected in a straight row without bending, reducing the processing amount of the copper bars. The low-voltage valve side phase 0 of the rectifier transformer is led out from the narrow surface of the transformer, and the phase 0 can be converged and connected in parallel to the negative electrode of the load, which is simple and economical.

[0041] The above has introduced in detail the low-voltage outgoing line method of a novel 12-pulse double reverse star rectifier transformer with a balance reactor provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation method of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A new type of 12-pulse double reverse star rectifier transformer with balanced reactor low voltage outlet mode, characterized in that: The invention comprises a structure for outputting wires from three sides of a transformer oil tank of a rectifier transformer, wherein the three sides are respectively two wide sides and one narrow side; the two wide sides are low-pressure valve test wires, the narrow side is a low-voltage 0-phase test wire, and the low-pressure valve test wire can be connected to a rectifier cabinet; the low-pressure valve test wire is divided into a phase, a phase, and a phase, and the phases a, b, and c are arranged in the order of top, middle, and bottom; the low-voltage 0-phase output wires are concentrated on the narrow side of the transformer and are arranged in a line to form a row of output wires.

2. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The low-pressure valve detection line is connected to the rectifier cabinet through the low-pressure valve detection line copper discharge lines respectively arranged on the two wide surfaces.

3. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The low voltage 0-phase outgoing line is arranged on the narrow side of the transformer and arranged in a line to form a row of outgoing lines, which is convenient for parallel wiring of the 0-phase copper busbar and shortens the connection copper busbar with the load end.

4. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The two wide-sided low-pressure valve measuring wire busbars are arranged in a symmetrical structure.

5. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The narrow low-voltage 0-phase outgoing copper busbars are concentrated into one row and connected in parallel.

6. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The spacing between the copper bars of each phase low-pressure valve measuring line is greater than 600mm.

7. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The low voltage 0 phase outgoing copper busbars are arranged in a row to form 1 row, which is convenient for 0 phase parallel wiring.

8. According to claim 1, a novel 12-pulse double reverse star rectifier transformer with balanced reactor low-voltage outlet mode is characterized in that: The minimum distance between the rectifier transformer and the rectifier cabinet is greater than 800 mm.

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