A rectifier transformer bank and power supply system
By adopting an N-split voltage regulating transformer and an independent voltage regulating winding structure in the rectifier transformer group, combined with the coordinated control of the on-load tap changer and the rectifier, the problem of reduced power factor of the rectifier system is solved, and multiple voltage outputs and cost reduction are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江西变压器科技股份有限公司
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-31
AI Technical Summary
When multiple electrolytic smelting equipment are under different loads, it is difficult to obtain an optimal value for the rectifier firing angle of the existing rectifier transformer group, which leads to a decrease in the power factor of the rectifier system, and the traditional structure cannot achieve multiple voltage outputs independently.
It adopts an N-split voltage regulating transformer and an independent voltage regulating winding structure. Each rectifier transformer is equipped with an on-load tap changer and a rectifier. The trigger angle is controlled by a controller to achieve coarse and fine voltage adjustment, ensuring that the trigger angle is within the optimal operating range.
It improves the power factor of the rectifier system, adapts to different load power distributions, reduces manufacturing costs, and enables multiple voltage outputs.
Smart Images
Figure CN224582114U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of transformer technology, and in particular to a rectifier transformer bank and power supply system. Background Technology
[0002] With the rapid development of science and technology and the improvement of industrial level, transformers have become an indispensable piece of equipment in industry.
[0003] Currently, a rectifier transformer bank with a wide range of output voltage levels typically consists of a voltage regulating transformer, multiple rectifier transformers, a voltage regulating switch, and other necessary components. It can achieve low-voltage output with a wide range of voltage levels to meet the process requirements of electrolysis and smelting. In electrolytic smelting production units, one rectifier transformer bank usually supplies power to multiple electrolytic smelting devices. The power factor of the rectifier system depends on the appropriateness of the firing angle (control angle) setting. When multiple electrolytic smelting devices have different production loads, because they share a single voltage regulating switch, a large range of adjustments to the rectifier firing angle (control angle) is required to adapt to the different loads. In this case, the rectifier firing angle (control angle) cannot achieve a relatively optimal value, thus reducing the power factor of the rectifier system. Utility Model Content
[0004] This application provides a rectifier transformer bank and a power supply system to at least address the shortcomings of the aforementioned related technologies.
[0005] In a first aspect, embodiments of this application provide a rectifier transformer bank, including at least one N-split tap-changing transformer, a plurality of rectifier transformers, an on-load tap changer, and other transformer components; The N-split voltage regulating transformer includes several pairs of split high-voltage windings and several independent voltage regulating windings. Each voltage regulating winding is connected to the corresponding rectifier transformer through a corresponding on-load tap changer. The rectifier transformer is used to supply power to independent electrical equipment in other components of the transformer.
[0006] Furthermore, the voltage regulating winding adopts a split structure, with each pair of split high-voltage windings and a voltage regulating winding forming an independent magnetic circuit unit to achieve electrical isolation.
[0007] Furthermore, a rectifier is provided at the output end of the rectifier transformer, and the independent electrical equipment is connected to the rectifier.
[0008] Furthermore, the rectifier transformer bank also includes a controller, which is connected to the on-load tap changer and the rectifier respectively.
[0009] Furthermore, the number of the independent electrical devices corresponds to the number of the rectifier transformers, and the number of the rectifier transformers corresponds to the number of the rectifiers.
[0010] Furthermore, the controller independently adjusts the corresponding on-load tap changer to achieve coarse voltage adjustment according to the load requirements of the independent electrical equipment, and independently adjusts the firing angle of the corresponding rectifier to achieve fine voltage adjustment. By coarsely controlling the coarse voltage adjustment and fine voltage adjustment, the firing angle of each rectifier is maintained in the optimal operating range.
[0011] Furthermore, the value of N ranges from 2 to 6.
[0012] This utility model also proposes a power supply system for independent electrical equipment, including the rectifier transformer group as described above.
[0013] Compared with related technologies, the rectifier transformer group and power supply system provided in this application have the following advantages: 1. Each rectifier transformer is individually controlled by a corresponding voltage regulating switch, thereby enabling the firing angle to achieve the optimal operating range and improving the power factor of the rectifier system; 2. Adapts to different load power distributions without reducing the power factor; 3. Multiple voltage outputs can be achieved using a single voltage regulating transformer; 4. The manufacturing process requirements are no different from those of traditional rectifier transformers, thereby reducing manufacturing costs.
[0014] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description
[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a structural distribution diagram of the rectifier transformer group in the first embodiment of this utility model.
[0016] Explanation of key component symbols: Voltage regulating winding 2 Independent electrical equipment 6 Voltage regulating switch 3 controller 7 rectifier transformer 4 The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.
[0018] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.
[0019] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.
[0020] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may represent singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Example
[0021] Please see Figure 1The image shows a rectifier transformer group in the first embodiment of the present invention, including at least one N-split voltage regulating transformer 1, several rectifier transformers 4, an on-load tap changer 3, and other transformer components. The N-split voltage regulating transformer 1 includes several pairs of split high-voltage windings and several independent voltage regulating windings 2. Each voltage regulating winding 2 is connected to the corresponding rectifier transformer 4 through a corresponding on-load tap changer 3. The rectifier transformer 4 is used to supply power to the independent electrical equipment 6 in other components of the transformer.
[0022] Furthermore, the voltage regulating winding 2 adopts a split structure, with each pair of split high-voltage windings and one voltage regulating winding 2 forming an independent magnetic circuit unit to achieve electrical isolation; a rectifier 5 is provided at the output end of the rectifier transformer 4, and the independent electrical equipment 6 is connected to the rectifier 5.
[0023] In this embodiment, the rectifier transformer group further includes a controller 7, which is connected to the on-load tap changer 3 and the rectifier 5 respectively.
[0024] Preferably, the value of N is in the range of 2-6, the number of independent electrical devices 6 corresponds to the number of rectifier transformers 4, and the number of rectifier transformers 4 corresponds to the number of rectifiers 5.
[0025] Specifically, the controller 7 independently adjusts the corresponding on-load tap changer 3 to achieve coarse voltage adjustment according to the load requirements of the independent electrical equipment 6, and independently adjusts the firing angle of the corresponding rectifier 5 to achieve fine voltage adjustment. By coarse and fine voltage adjustment, the firing angle of each rectifier 5 is maintained in the optimal operating range.
[0026] In practical implementation, the voltage regulating transformer 1 is equipped with N pairs of split high-voltage windings and voltage regulating windings 2; each voltage regulating winding 2 is connected to a corresponding voltage regulating switch 3; the output of the voltage regulating switch 3 is connected to a corresponding rectifier transformer 4; each rectifier transformer 4 powers one electrolytic smelting device; when the production loads of the N electrolytic smelting devices (independent electrical equipment 6) are different, adjusting the corresponding voltage regulating switch 3 position allows the firing angle (control angle) of the rectifier 5 to achieve a relatively optimal value, thereby improving the power factor of the rectifier system. Only through the comprehensive use of the above structure and electrical connections can the output voltage of the rectifier 5 be matched to the production load when the firing angle (control angle) of the rectifier 5 reaches a reasonable value. All of the above structure and electrical connections are indispensable.
[0027] When the loads of the electrolytic smelting equipment (independent equipment 6) 1-N are different, the rectifier 51-N needs to output different voltages. The controller 7 adjusts the voltage regulating switch 3 position and the rectifier 5 firing angle (control angle) according to the set program. The voltage regulating switch 3 position is adjusted to coarse adjustment and the rectifier 5 firing angle (control angle) is adjusted to fine adjustment. In this way, the rectifier 5 firing angle (control angle) can be adjusted to an optimal operating range, and the power factor of the rectifier system is high.
[0028] This embodiment also proposes a power supply system for independent electrical equipment, including the rectifier transformer group as described above.
[0029] In summary, the rectifier transformer group and power supply system described in the above embodiments of this utility model have the following beneficial effects: 1. Each rectifier transformer is individually controlled by a corresponding voltage regulating switch, thereby enabling the firing angle to achieve the optimal operating range and improving the power factor of the rectifier system; 2. Adapts to different load power distributions without reducing the power factor; 3. Multiple voltage outputs can be achieved using a single voltage regulating transformer; 4. The manufacturing process requirements are no different from those of traditional rectifier transformers, thereby reducing manufacturing costs.
[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0031] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements 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 rectifier transformer set, characterized in that It includes at least one N-split tap-changing transformer, N rectifier transformers, on-load tap changers, and other transformer components; The N-split voltage regulating transformer includes several pairs of split high-voltage windings and several independent voltage regulating windings. Each voltage regulating winding is connected to the corresponding rectifier transformer through a corresponding on-load tap changer. The rectifier transformer is used to supply power to independent electrical equipment in other components of the transformer.
2. The rectifier transformer set according to claim 1, characterized in that The voltage regulating winding adopts a split structure, with each pair of split high-voltage windings and a voltage regulating winding forming an independent magnetic circuit unit to achieve electrical isolation.
3. The rectifier transformer set of claim 2, wherein, A rectifier is provided at the output end of the rectifier transformer, and the independent electrical equipment is connected to the rectifier.
4. The rectifier transformer set of claim 3, wherein, The rectifier transformer bank also includes a controller, which is connected to the on-load tap changer and the rectifier respectively.
5. The rectifier transformer set of claim 3, wherein, The number of independent electrical devices corresponds to the number of rectifier transformers, and the number of rectifier transformers corresponds to the number of rectifiers.
6. The rectifier transformer set of claim 4, wherein, The controller independently adjusts the corresponding on-load tap changer to achieve coarse voltage adjustment according to the load requirements of the independent electrical equipment, and independently adjusts the firing angle of the corresponding rectifier to achieve fine voltage adjustment. By coarse and fine voltage adjustment, the firing angle of each rectifier is maintained in the optimal operating range.
7. The rectifier transformer set of claim 3, wherein, The value of N ranges from 2 to 6.
8. A power supply system for stand-alone electrical devices, characterized by Includes the rectifier transformer bank as described in any one of claims 1 to 7.