Method and device for regulating high current by tap changer

Abstract

This invention relates to the field of high-current generating devices, and discloses a method and apparatus for adjusting high current using tap changers. The method and apparatus divide the secondary winding of a three-phase transformer in the high-current generating device into multiple independent windings, and installs a first tap and a second tap on both sides of each independent winding. A switching element is installed on each first and second tap, and the switching element is connected to an operating platform. This invention allows control of the opening and closing of the switching elements via the operating platform, thereby adjusting the connection mode of each tap and regulating the current output, solving the technical problem that existing high-current generating devices cannot regulate the output current.

Description

Technical Field

[0001] This invention relates to the field of high current generating device technology, and in particular to a method and device for adjusting high current using a tap. Background Technology

[0002] Currently, most high-current generators do not have the function of output current regulation. In actual use, they cannot reasonably select the output according to the load conditions, which may cause the output current to be too large and cause the load to overheat, or the output current to be too small and fail to meet the load requirements, thus causing unnecessary energy loss. Summary of the Invention

[0003] This invention provides a method and apparatus for adjusting large current with a tap, which solves the technical problem that existing large current generating devices cannot adjust the output current.

[0004] The first aspect of the present invention provides a method for adjusting a large current using a tap, the method comprising:

[0005] The secondary winding of the three-phase transformer in the high current generating device is divided into multiple independent windings. A first tap is installed at the same-name end of each independent winding, and a second tap is installed at the non-same-name end of each independent winding.

[0006] Each of the first taps is connected to a first switching element, and the first switching elements are interconnected through a first busbar, with a common outgoing line provided on the first busbar.

[0007] Each of the second taps is connected to a second switching element, and the second switching elements are interconnected via a second busbar;

[0008] For any two adjacent independent windings, a third switching element is provided between the second tap of one independent winding and the first tap of the other independent winding;

[0009] Connect all the first switching elements, the second switching elements, and the third switching elements to the operating platform;

[0010] According to the required output current, the corresponding control command is input to the operating platform to control the opening and closing actions of the first switching element, the second switching element and the third switching element.

[0011] According to one achievable method of the first aspect of the present invention, dividing the secondary winding of the three-phase transformer in the high-current generating device into multiple independent windings includes:

[0012] Determine the number of independent windings required for the division;

[0013] Based on the number of independent windings, the secondary windings of the three-phase transformer are divided into equal turns.

[0014] A second aspect of the present invention provides a device for adjusting large current with a tap, comprising a three-phase transformer, an actuating mechanism, and an operating platform;

[0015] The actuating mechanism includes multiple first switching elements, multiple second switching elements, and multiple third switching elements;

[0016] The secondary side of the three-phase transformer is provided with multiple independent windings. Each independent winding is equipped with a first tap at the same-name end and a second tap at the non-same-name end of each independent winding.

[0017] Each of the first taps is connected to a first switching element, and the first switching elements are interconnected through a first busbar, with a common outgoing line provided on the first busbar; each of the second taps is connected to a second switching element, and the second switching elements are interconnected through a second busbar; for any two adjacent independent windings, a third switching element is provided between the second tap of one independent winding and the first tap of the other independent winding;

[0018] All the first, second, and third switching elements are connected to an operating platform, which is used to control the opening and closing actions of the first, second, and third switching elements.

[0019] According to one achievable method of the second aspect of the invention, each of the individual windings has the same number of turns.

[0020] According to one embodiment of the second aspect of the invention, the first switching element is a high-voltage circuit breaker or a thyristor; the second switching element is a high-voltage circuit breaker or a thyristor; and the third switching element is a high-voltage circuit breaker or a thyristor.

[0021] According to one embodiment of the second aspect of the present invention, the operating platform includes a human-computer interaction module and a control module, wherein the human-computer interaction module includes an input unit:

[0022] The input unit is used to input control commands, which include current adjustment levels;

[0023] The control module is used to generate a corresponding control signal according to the current regulation level and send it to the actuating mechanism.

[0024] According to one possible embodiment of the second aspect of the invention, the input unit is one or more combinations of buttons, keyboards, voice units, and touch units.

[0025] According to one embodiment of the second aspect of the invention, the input unit is connected to a mobile terminal; the input unit is further configured to receive control commands sent by the mobile terminal.

[0026] According to one embodiment of the second aspect of the present invention, the human-computer interaction module further includes an output unit;

[0027] The output unit is used to receive and display the opening and closing status information fed back by the actuation mechanism.

[0028] According to one embodiment of the second aspect of the invention, the output unit is further connected to a mobile terminal; the output unit is also configured to send the opening / closing state information to the mobile terminal.

[0029] As can be seen from the above technical solutions, the present invention has the following advantages:

[0030] This invention divides the secondary winding of a three-phase transformer in a high-current generator into multiple independent windings, and installs a first tap and a second tap on both sides of each independent winding. A switching element is installed on each of the first and second taps, and the switching element is connected to an operating platform. This invention allows control of the opening and closing of the switching element via the operating platform, thereby adjusting the connection method of each tap and regulating the current output, thus solving the technical problem that existing high-current generators cannot regulate the output current. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a flowchart of a method for adjusting a large current using a tap in an optional embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the installation of a tap and switching element according to an optional embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the structural connection of a tap-adjusting device for high current according to an optional embodiment of the present invention. Attached image description:

[0036] 1-First tap; 2-Second tap; 3-First switching element; 4-Second switching element; 5-Third switching element; 6-Three-phase transformer; 7-Actuating mechanism; 8-Operating platform; A-Common outgoing line. Detailed Implementation

[0037] This invention provides a method and apparatus for adjusting high current using a tap, which solves the technical problem that existing high current generating devices cannot adjust the output current.

[0038] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0039] Figure 1 A flowchart illustrating a method for adjusting high current using a tap according to an embodiment of the present invention is shown.

[0040] Please see Figure 1 The present invention provides a method for adjusting large current with a tap, comprising steps S1-S6.

[0041] Step S1: Divide the secondary winding of the three-phase transformer 6 in the high current generating device into multiple independent windings, install a first tap 1 at the same end of each independent winding, and install a second tap 2 at the non-same end of each independent winding.

[0042] In one feasible manner, dividing the secondary winding of the three-phase transformer 6 in the high-current generating device into multiple independent windings includes:

[0043] Determine the number of independent windings required for the division;

[0044] Based on the number of independent windings, the secondary windings of the three-phase transformer 6 are divided into equal turns.

[0045] By dividing the windings into independent windings in the above manner, each independent winding is an equal-turn winding. The number of independent windings to be divided can be determined based on the actual number of current regulation levels required. For example, when the actual number of current regulation levels required is N, the number of independent windings can be set to N. This embodiment of the invention is not limited to this.

[0046] Step S2: For each of the first taps 1, a first switch element 3 is connected. The first switch elements 3 are interconnected through the first busbar. A common outgoing line A is provided on the first busbar.

[0047] In this embodiment of the invention, a first switching element 3 is provided outside the tap of the same name end of the independent winding, so that the opening and closing actions of each first switching element 3 can be controlled as needed, thereby realizing the "parallel" action of each first tap 1, and realizing the convergence and output through the common output line A.

[0048] Step S3: For each of the second taps 2, a second switching element 4 is connected, and the second switching elements 4 are interconnected through the second busbar.

[0049] This step involves installing a second switching element 4 outside the tap of the non-identical end of the independent winding, which enables subsequent neutral point (star connection) connection as needed. It also allows for the selection of whether to ground or add additional switching elements to achieve delta connection.

[0050] Step S4: For any two adjacent independent windings, a third switching element 5 is set between the second tap 2 of one independent winding and the first tap 1 of the other independent winding.

[0051] By setting the parameters in step S4, a third switching element 5 is provided between all adjacent first taps 1 and second taps 2, except for the first tap 1 of the first independent winding and the second tap 2 of the last independent winding. Figure 2 As shown. After the third switch element 5 is closed as needed, the first tap 1 and the second tap 2 can be connected in series, thereby connecting the corresponding independent windings in series.

[0052] When the number of independent windings is N, the required number of switching elements is 3N-1. After executing steps S1-S4, the connection relationships between the taps and switching elements can be found in [reference needed]. Figure 2 .

[0053] Step S5: Connect all the first switching elements 3, the second switching elements 4 and the third switching elements 5 to the operating platform 8.

[0054] Step S6: Input the corresponding control command to the operation platform 8 according to the required output current, so as to control the opening and closing actions of the first switching element 3, the second switching element 4 and the third switching element 5 accordingly.

[0055] It should be noted that the first switching element 3, the second switching element 4, and the third switching element 5 are all components with controllable electrical opening and closing functions. They need to be able to withstand the rated voltage and operating overvoltage of the transformer secondary side, and have good current-carrying capacity, as well as good sensitivity and mechanical stability. Examples include high-voltage circuit breakers or thyristors.

[0056] The operator can select the desired current regulation level through the aforementioned operating platform 8. Then, the operating platform 8 can output corresponding control signals to the corresponding first switching element 3, second switching element 4, and third switching element 5 according to the current regulation level, so that the first switching element 3, second switching element 4, and third switching element 5 perform corresponding opening and closing actions, so that the corresponding taps of each independent winding are electrically connected in parallel or in series, thereby realizing the regulation of the output current.

[0057] For example, when there are four independent windings, the current regulation level can be set to one to four levels;

[0058] When the current regulation level is level one, it means that the output current to be regulated is the maximum. The operating platform 8 can output the corresponding control signal to the corresponding first switch element 3, second switch element 4 and third switch element 5 according to the current regulation level, so that the first switch of the first independent winding is closed, the second switch of the last independent winding is closed, the third switch element 5 is closed, and the remaining switches are open, thereby realizing the series connection of the taps of each independent winding to achieve the maximum current output.

[0059] When the current regulation level is four, it means that the output current to be regulated is the minimum. The operating platform 8 can output the corresponding control signal to the corresponding first switch element 3, second switch element 4 and third switch element 5 according to the current regulation level, so that all first switch elements 3 and second switch elements 4 are in the closed state, and the third switch element 5 is in the open state, thereby realizing the parallel connection of the taps of each independent winding to achieve the minimum current output.

[0060] Figure 3 A schematic diagram of the structural connection of a tap-adjusting device for high current according to an embodiment of the present invention is shown.

[0061] like Figure 3 As shown, the device includes a three-phase transformer 6, an actuating mechanism 7, and an operating platform 8;

[0062] The actuation mechanism 7 includes a plurality of first switching elements 3, a plurality of second switching elements 4, and a plurality of third switching elements 5;

[0063] The secondary side of the three-phase transformer is provided with multiple independent windings. Each independent winding is equipped with a first tap 1 at the same end and a second tap 2 at the non-same end of each independent winding.

[0064] Each of the first taps 1 is connected to a first switching element 3, and the first switching elements 3 are interconnected through a first busbar, with a common outgoing line A provided on the first busbar; each of the second taps 2 is connected to a second switching element 4, and the second switching elements 4 are interconnected through a second busbar; for any two adjacent independent windings, a third switching element 5 is provided between the second tap 2 of one independent winding and the first tap 1 of the other independent winding;

[0065] All the first switching elements 3, the second switching elements 4 and the third switching elements 5 are connected to the operating platform 8, which is used to control the opening and closing actions of the first switching elements 3, the second switching elements 4 and the third switching elements 5.

[0066] In one feasible manner, each of the individual windings has the same number of turns.

[0067] In one feasible implementation, the first switching element 3 is a high-voltage circuit breaker or a thyristor; the second switching element 4 is a high-voltage circuit breaker or a thyristor; and the third switching element 5 is a high-voltage circuit breaker or a thyristor.

[0068] In one feasible implementation, the operating platform 8 includes a human-computer interaction module and a control module, wherein the human-computer interaction module includes an input unit:

[0069] The input unit is used to input control commands, which include current adjustment levels;

[0070] The control module is used to generate a corresponding control signal according to the current regulation level and send it to the actuating mechanism 7.

[0071] In one feasible manner, the input unit is one or more combinations of buttons, keyboards, voice units, and touch units.

[0072] In one feasible implementation, the input unit is connected to a mobile terminal; the input unit is also used to receive control commands sent by the mobile terminal.

[0073] This setting allows users to remotely adjust the output current of the high-current generator via a mobile terminal.

[0074] In one feasible implementation, the human-computer interaction module further includes an output unit;

[0075] The output unit is used to receive and display the opening and closing status information fed back by the actuation mechanism 7.

[0076] In one feasible implementation, the output unit is also connected to a mobile terminal; the output unit is also used to send the opening / closing status information to the mobile terminal.

[0077] This setting allows users to easily view the opening and closing status information of each switch in the motion mechanism 7 via a mobile terminal.

[0078] In the above embodiments of the present invention, the secondary winding of the three-phase transformer in the high-current generating device is divided into multiple independent windings, and a first tap 1 and a second tap 2 are installed on both sides of each independent winding. Switching elements are installed on each of the first tap 1 and second tap 2, and these switching elements are connected to an operating platform 8. The present invention can control the opening and closing of the switching elements through the operating platform 8, thereby adjusting the connection method of each tap and regulating the current output. This solves the technical problem that existing high-current generating devices cannot regulate the output current. The adjustment method is intelligent, safe, and convenient, thus making the entire high-current generating device more economical, flexible, and adaptable to multiple scenarios, thereby ensuring the safe and stable operation of the entire transmission line and reducing unnecessary economic losses and social impact.

[0079] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the devices, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0080] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0081] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0082] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0083] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for adjusting large current using a tap changer, characterized in that, include: The secondary winding of the three-phase transformer in the high current generating device is divided into multiple independent windings. A first tap is installed at the same-name end of each independent winding, and a second tap is installed at the non-same-name end of each independent winding. Each of the first taps is connected to a first switching element, and the first switching elements are interconnected through a first busbar, with a common outgoing line provided on the first busbar. Each of the second taps is connected to a second switching element, and the second switching elements are interconnected via a second busbar; For any two adjacent independent windings, a third switching element is provided between the second tap of one independent winding and the first tap of the other independent winding; Connect all the first switching elements, the second switching elements, and the third switching elements to the operating platform; According to the required output current, the corresponding control command is input to the operating platform. The control command includes the current adjustment level. The operating platform generates a control signal according to the current adjustment level and controls the opening and closing actions of the first switching element, the second switching element and the third switching element accordingly, so as to adjust the output current by connecting the corresponding taps of each independent winding in parallel or in series. The method of dividing the secondary winding of the three-phase transformer in the high-current generating device into multiple independent windings includes: Determine the number of independent windings required for the division; Based on the number of independent windings, the secondary windings of the three-phase transformer are divided into equal turns.

2. A device for adjusting large current using a tap, characterized in that, Includes a three-phase transformer, actuating mechanism, and operating platform; The actuating mechanism includes multiple first switching elements, multiple second switching elements, and multiple third switching elements; The secondary side of the three-phase transformer is provided with multiple independent windings. Each independent winding is equipped with a first tap at the same-name end and a second tap at the non-same-name end of each independent winding. Each of the first taps is connected to a first switching element, and the first switching elements are interconnected through a first busbar, with a common outgoing line provided on the first busbar; each of the second taps is connected to a second switching element, and the second switching elements are interconnected through a second busbar; for any two adjacent independent windings, a third switching element is provided between the second tap of one independent winding and the first tap of the other independent winding; All the first, second, and third switching elements are connected to an operating platform, which is used to control the opening and closing actions of the first, second, and third switching elements.

3. The tap changer for adjusting large current according to claim 2, characterized in that, Each of the independent windings has the same number of turns.

4. The tap changer for adjusting large current according to claim 2, characterized in that, The first switching element is a high-voltage circuit breaker or a thyristor; the second switching element is a high-voltage circuit breaker or a thyristor; and the third switching element is a high-voltage circuit breaker or a thyristor.

5. The tap changer for adjusting large current according to claim 2, characterized in that, The operating platform includes a human-computer interaction module and a control module. The human-computer interaction module includes an input unit. The input unit is used to input control commands, which include current adjustment levels; The control module is used to generate a corresponding control signal according to the current regulation level and send it to the actuating mechanism.

6. The tap changer for adjusting large current according to claim 5, characterized in that, The input unit is one or more of the following: button, keyboard, voice unit, and touch unit.

7. The tap changer for adjusting large current according to claim 5, characterized in that, The input unit is connected to the mobile terminal; the input unit is also used to receive control commands sent by the mobile terminal.

8. The tap changer for adjusting large current according to claim 5, characterized in that, The human-computer interaction module also includes an output unit; The output unit is used to receive and display the opening and closing status information fed back by the actuation mechanism.

9. The tap changer for adjusting large current according to claim 8, characterized in that, The output unit is also connected to the mobile terminal; the output unit is also used to send the opening / closing status information to the mobile terminal.

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