Transformer with continuously adjustable voltage
By designing a transformer with continuously adjustable voltage and utilizing a combination of control and regulation modules, continuous control of the secondary voltage is achieved. This enables reactive power compensation, harmonic current suppression, and three-phase imbalance mitigation, solving the problem of non-continuous voltage regulation in existing technologies and enabling the application of more advanced power electronic equipment on the low-voltage side.
Patent Information
- Application Number
- CN202422940539.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing technologies cannot achieve continuous voltage regulation, and traditional methods have difficulty obtaining power from the high-voltage side. Furthermore, the controllability of power electronic devices is poor, making it impossible to effectively control the voltage on the control area side.
A continuously adjustable voltage transformer is designed. Through a control module and an adjustment module, the magnetic flux is continuously adjusted by using a combination of adjustment components, input components, output components and auxiliary components. This includes the use of a first converter, a second converter and a capacitor, an auxiliary coil and an auxiliary magnetic column, a secondary coil and a secondary magnetic column, and a primary coil and a primary magnetic column to achieve continuous adjustment of the output voltage.
It achieves continuous control of the secondary voltage, has reactive power compensation, harmonic current suppression and three-phase imbalance control functions, and is more convenient to extract energy from the low-voltage side, and adopts more advanced power electronic equipment.
Smart Images
Figure CN223638988U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transformer technical field, especially a transformer of voltage continuous adjustable. BACKGROUND
[0002] With the continuous progress of the grid-connected technology of distributed power supply, its influence on the power quality of distribution network is increasingly significant, among which the voltage out-of-limit problem is particularly prominent. In view of this challenge, the industry has explored various coping strategies. The common method includes direct voltage regulation through OLTC, but this method cannot realize continuous regulation of voltage; at present, there are also power electronic devices such as UPQC added to the load side to control voltage, but this method cannot control the voltage on the station area side; at present, there are also methods involving controlling the magnetic flux through the magnetic method to control the voltage, but this method mainly takes power from the high-voltage side, which is difficult to take power, and the traditional switching power supply has poor controllable ability and does not have other functions, and the practicability is poor.
[0003] Therefore, we design a transformer with continuous adjustable voltage, which can realize continuous control of the secondary voltage; it also has the functions of reactive power compensation, harmonic current suppression and three-phase imbalance treatment. SUMMARY
[0004] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.
[0005] In view of the above or the problem that the voltage cannot be continuously adjusted in the prior art, the utility model is proposed.
[0006] Therefore, the purpose of the utility model is to provide a transformer with continuous adjustable voltage.
[0007] To solve the above technical problems, the utility model provides the following technical scheme: a transformer with continuous adjustable voltage, comprising a control module and an adjustment module; the adjustment module comprises an adjustment part connected with the control module, and an input part, an output part and an auxiliary part connected with the adjustment part; the control module adjusts the output voltage of the output part by controlling the magnetic flux change of the auxiliary part through the adjustment part.
[0008] As a preferred scheme of the transformer with continuous adjustable voltage of the utility model, wherein: the adjustment part comprises a first converter and a second converter connected with the control module, and a capacitor connected between the first converter and the second converter.
[0009] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the auxiliary piece includes auxiliary coil and auxiliary magnetic column, the auxiliary coil is wound on the auxiliary magnetic column.
[0010] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the two ends of the auxiliary coil are connected with the first commutator.
[0011] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the output piece includes secondary side coil and secondary side magnetic column, the secondary side coil is wound on the secondary side magnetic column.
[0012] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the two ends of the secondary side coil are connected with the second commutator and load, and the load and the second commutator are connected in parallel.
[0013] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the input piece includes primary side coil and primary side magnetic column, and the primary side coil is wound on the primary side magnetic column.
[0014] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the two ends of the primary side coil are connected with the input power supply.
[0015] As a preferred scheme of the voltage continuously adjustable transformer of the utility model, wherein: the primary side magnetic column, the secondary side magnetic column and the auxiliary magnetic column are stacked to form a "day" shaped iron core.
[0016] The utility model discloses the beneficial effects: through setting control module to the magnetic flux of adjusting module is adjusted, to realize the continuous control of secondary side voltage, and realize the function of reactive power compensation, harmonic current suppression, three-phase unbalance treatment. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can be obtained according to these drawings without the creative labor, wherein:
[0018] Figure 1 It is the schematic diagram of the utility model.
[0019] Figure 2 It is the structure schematic diagram of the utility model. DETAILED DESCRIPTION
[0020] In order to make the above objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0021] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.
[0022] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.
[0023] Embodiment 1
[0024] Referring to Figure 1 For the first embodiment of the present application, the embodiment provides a voltage continuously adjustable transformer, which can realize the effect of continuously adjusting the output voltage, which comprises a control module 100 and an adjusting module 200; the control module 100 is arranged to control the magnetic flux change of the adjusting module 200, so as to realize the continuous adjustment of the output voltage of the adjusting module 200.
[0025] Specifically, the adjusting module 200 comprises an adjusting part 201 connected with the control module 100, and an input part 202, an output part 203 and an auxiliary part 204 connected with the adjusting part 201; the control module 100 controls the adjusting part 201 to adjust the magnetic flux change of the auxiliary part 204, so as to indirectly adjust the magnetic flux of the output part 203, thereby realizing the continuous adjustment of the output voltage of the output part 203; the input part 202 is used to externally connect the input power supply.
[0026] Further, the control module 100 controls the adjusting part 201 to adjust the magnetic flux change of the auxiliary part 204 to continuously adjust the output voltage of the output part 203.
[0027] Operation process: the input part 202 is externally connected with the power supply, the control module 100 controls the adjusting part 201 to control the magnetic flux of the auxiliary part 204, so as to indirectly adjust the magnetic flux of the output part 203, the magnetic flux of the output part 203 is equal to the sum of the magnetic fluxes of the auxiliary part 204 and the input part 202, and the continuous adjustment of the output voltage of the output part 203 is realized by adjusting the magnetic flux of the output part 203.
[0028] In summary, the magnetic flux of the auxiliary part 204 is controlled by setting the control module 100 to control the adjusting part 201, thereby indirectly controlling the output part 202, so that the secondary side voltage is controlled, so that the device can take power on the low voltage side, which is more convenient, and more advanced power electronic equipment is adopted.
[0029] Embodiment 2
[0030] With reference to Figures 1-2 The second embodiment of the utility model is different from the previous embodiment, and further optimization of the transformer with continuously adjustable voltage is provided, and the problem of how to adjust is solved. The transformer comprises an adjusting part 201, a first inverter 201a and a second inverter 201b connected with the control module 100, and a capacitor 201c connected between the first inverter 201a and the second inverter 201b. The first inverter 201a, the second inverter 201b and the capacitor 201c jointly constitute a set of power electronic modules, which are connected in parallel with the auxiliary part 204, so as to control the magnetic flux of the auxiliary part 204.
[0031] Specifically, the auxiliary part 204 comprises an auxiliary coil 204a and an auxiliary magnetic column 204b, and the auxiliary coil 204a is wound around the auxiliary magnetic column 204b. The two ends of the auxiliary coil 204a are connected with the first inverter 201a. The magnetic flux in the auxiliary part 204 is adjusted by controlling the first inverter 201a, the second inverter 201b and the capacitor 201c through the control module 100.
[0032] The output part 203 comprises a secondary side coil 203a and a secondary side magnetic column 203b, and the secondary side coil 203a is wound around the secondary side magnetic column 203b. The two ends of the secondary side coil 203a are connected with the second inverter 201b and the load 300, and the load 300 and the second inverter 201b are connected in parallel. The magnetic flux of the output part 203 is indirectly adjusted by changing the magnetic flux in the auxiliary part 204.
[0033] Preferably, the input part 202 comprises a primary side coil 202a and a primary side magnetic column 202b, and the primary side coil 202a is wound around the primary side magnetic column 202b. The two ends of the primary side coil 202a are connected with an input power supply. The input part 202 is connected with an alternating current power supply, and the alternating current power supply generates a magnetic flux Φ1 in the iron core.
[0034] Further, the primary side magnetic column 202b, the secondary side magnetic column 203b and the auxiliary magnetic column 204b are stacked to form a "day" shaped iron core. According to the principle of magnetic flux conservation, Φ1+Φ3=Φ2.
[0035] Operation process: based on the principle of magnetic circuit conservation, the secondary side voltage of the transformer is continuously adjusted by controlling the magnetic flux in the secondary side coil 203a, specifically:
[0036] When the primary side of the transformer, i.e. the input 202, is connected to an AC power source, the voltage is denoted as U s At this time, the magnetic flux Φ1 is generated in the core, and the relationship between Us and Φ1 is:
[0037]
[0038] In the formula, U s is the input voltage, e1 is the induced electromotive force of the primary side, N1 is the number of turns of the primary winding, Φ1 is the magnetic flux induced by the primary voltage, and f is the frequency 50 Hz.
[0039] The magnetic motive force induced by the secondary winding, i.e. the magnetic motive force induced by the output 203, is
[0040]
[0041] In the formula, U2 is the induced voltage of the secondary side, e2 is the induced electromotive force of the secondary side, N2 is the number of turns of the secondary winding, Φ2 is the magnetic flux flowing through the secondary coil, and f is the frequency 50 Hz.
[0042] Since the transformer core is composed of two mouth-shaped cores stacked together, it becomes a "day" shaped core, which belongs to a parallel core. Therefore, in the three magnetic columns, according to the principle of magnetic flux conservation, we have:
[0043] Φ1+Φ3=Φ2
[0044] In the formula, Φ3 is the magnetic flux flowing through the auxiliary coil 204a.
[0045] Therefore
[0046]
[0047] When the primary side voltage U s is constant, the magnetic flux Φ1 is constant, so the auxiliary coil side voltage can be adjusted to control the magnetic flux in the secondary winding and thus control the secondary voltage U2.
[0048] When the transformer is working normally, the first commutator 201a and the second commutator 201b are controlled by the control module 100, so as to control the change of the magnetic flux in the secondary winding, i.e. the output 203, to make
[0049]
[0050] At this time, the secondary output voltage is the induced voltage of the primary side of the transformer.
[0051] When the secondary side voltage of the transformer is low, the first commutator 201a and the second commutator 201b are controlled by the control module 100 to adjust the magnetic flux in the secondary winding, so as to raise the secondary side voltage of the transformer and stabilize it around the rated value.
[0052] When the voltage on the secondary side of the transformer is too high, the first converter 201a and the second converter 201b are controlled by the control module 100 to adjust the magnetic flux in the secondary winding, thereby reducing the secondary side voltage of the transformer and stabilizing it around the rated value.
[0053] In summary, the magnetic flux of the auxiliary part 204 is adjusted by the control module 100 to control the adjusting part 201, thereby indirectly adjusting the magnetic flux of the output part 203, so as to continuously adjust the output voltage of the output part 203.
[0054] Embodiment 3
[0055] Referring to Figures 1-2 For the third embodiment of the utility model, unlike the previous embodiment, this embodiment provides a continuously adjustable voltage transformer, which solves the problem of how to achieve reactive power compensation, harmonic current suppression, and three-phase imbalance management.
[0056] When the reactive power on the secondary side of the transformer is insufficient, the second converter 201b is controlled by the control module 100 to achieve reactive power compensation on the secondary side of the transformer.
[0057] When three-phase current imbalance occurs on the secondary side of the transformer, the second converter 201b is controlled by the control module 100 to achieve three-phase imbalance management on the secondary side of the transformer.
[0058] When a large amount of current harmonics is generated on the secondary side of the transformer, the second converter 201b is controlled by the control module 100 to achieve harmonic suppression of the current on the secondary side of the transformer.
[0059] In summary, the second converter 201b is adjusted by the control module 100 to achieve reactive power compensation, three-phase imbalance management, and harmonic suppression on the secondary side of the transformer.
[0060] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the spirit and scope of the application as described in the claims. For example, the order in which steps are performed can be changed, or other steps can be added, omitted, or modified. Accordingly, all such modifications are intended to be included within the scope of the present application. The application is meant to encompass all techniques and structures that are the same as or similar to those described in this disclosure, and alternatives and modifications that are apparent to those skilled in the art are intended to be encompassed by the present claims. The claims should not be limited to the embodiments set forth in the specific written description and the drawings, but can include any other embodiments that fall within the scope of the present application as defined by the claims.
[0061] Furthermore, in order to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described.
[0062] It is understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to modifications, not all of which can be wholly incorporated into this disclosure. Moreover, it will be appreciated that the development of an actual implementation is a complex and time-consuming process that would not be reasonable in to capture in complete detail in this disclosure. The detailed description is, therefore, not to be taken in a literal sense, and the specific implementation described is meant to be illustrative only and not limiting as to the scope of the present application.
[0063] It should be noted that the above examples are merely used to illustrate the technical solutions of the present application, rather than limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all should be included in the scope of the claims of the present application.
Claims
1. A continuously adjustable voltage transformer, characterized by: The utility model relates to a control module (100) and adjusting module (200) are connected to each other, The adjusting module (200) includes adjusting part (201) connected with the control module (100), and input part (202), output part (203), auxiliary part (204) connected with adjusting part (201), The control module (100) continuously adjusts the output voltage of output part (203) by controlling the magnetic flux change of auxiliary part (204) through adjusting part (201). The adjusting part (201) includes first converter (201a) and second converter (201b) connected with the control module (100), and capacitor (201c) connected between first converter (201a) and second converter (201b).
2. The continuously adjustable voltage transformer of claim 1, wherein: The auxiliary part (204) includes auxiliary coil (204a) and auxiliary magnetic column (204b), and the auxiliary coil (204a) is wound on the auxiliary magnetic column (204b).
3. The continuously adjustable voltage transformer of claim 2, wherein: Two ends of the auxiliary coil (204a) are connected with the first converter (201a).
4. The continuously adjustable voltage transformer of claim 3, wherein: The output part (203) includes secondary side coil (203a) and secondary side magnetic column (203b), and the secondary side coil (203a) is wound on the secondary side magnetic column (203b).
5. The continuously adjustable voltage transformer of claim 4, wherein: Two ends of the secondary side coil (203a) are connected with the second converter (201b) and load (300), and the load (300) and the second converter (201b) are connected in parallel.
6. The continuously adjustable voltage transformer of claim 5, wherein: The input part (202) includes primary side coil (202a) and primary side magnetic column (202b), and the primary side coil (202a) is wound on the primary side magnetic column (202b).
7. The continuously adjustable voltage transformer of claim 6, wherein: Two ends of the primary side coil (202a) are connected with the input power supply.
8. The continuously adjustable voltage transformer of claim 7, wherein: The primary side magnetic column (202b), the secondary side magnetic column (203b) and the auxiliary magnetic column (204b) are superimposed to form a "day" shaped iron core.
9. The continuously adjustable voltage transformer of claim 8, wherein: