Transformer operation control circuit and operation control system

Abstract

The utility model relates to the technical field of transformers, in particular to a transformer operation control circuit and an operation control system. The transformer operation control circuit comprises a plurality of buses, a first transformer, a second transformer, a first switch, a second switch, a third switch, a first voltage detection device, a second voltage detection device, a third voltage detection device and a closing control device. The closing control equipment obtains a first closing trigger instruction and controls the first switch to be closed when a first voltage difference between two ends of the first switch is smaller than or equal to a preset difference value; the closing control equipment acquires a second closing trigger instruction and controls the second switch to be closed when a second voltage difference between two ends of the second switch is smaller than or equal to a preset difference value; the closing control device obtains a third closing trigger instruction and controls the third switch to be closed when a third voltage difference between the two ends of the third switch is smaller than or equal to a preset difference value. According to the utility model, risks in non-synchronous closing and operation processes can be avoided, and the working efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer operation control circuit and operation control system. Background Technology

[0002] The power system is a complex system that produces and provides electrical energy to meet various electricity demands. It consists of four major systems: power generation, transmission and transformation, distribution, and consumption. These systems are interconnected yet independent, undertaking the functions of power generation, transmission, distribution, and consumption. The low-voltage plant utility system is a crucial link in the transmission and transformation process, reducing high voltage to low voltage and then transmitting it to the distribution equipment used by users at various levels through the transmission network. Under normal circumstances, for safety reasons, the operators of transformers in the power plant's utility system are not assigned to the same generating unit. When transformer maintenance is required for work purposes, a non-stop loop-closing operation must first be performed to connect two transformers and their 400V busbars in parallel, and then the transformer to be maintained is de-energized and switched to maintenance. There is a risk of asynchronous closing when closing the loop between two 400V PC section busbars. Therefore, the DCS logic has a "three-out-of-two" interlocking logic and a primary hard-wired blocking circuit for the 400V PC section working power supply incoming switch and sectionalizing switch in the utility system. However, this logic and circuit wiring delays operation and emergency handling.

[0003] In related technologies, a public utility system transformer includes two transformers (a first transformer and a second transformer). The first transformer is connected to one busbar via a first switch, the second transformer is connected to another busbar via a second switch, and one busbar is connected to another busbar via a third switch. To close the third switch, a manual operator must use a testing device to measure the voltage difference across the switch. Once the voltage difference is found to be less than or equal to a preset value, the operator returns to the control room to close the third switches. This presents inconvenience for non-professionals, poses potential risks to operators, and reduces work efficiency. Furthermore, since the voltage difference across the third switch changes constantly, the manual measurement in the existing technology, such as obtaining the voltage difference at the first moment, may not match the voltage difference when the operator returns to the control room (at the second moment), making it impossible to ensure the accuracy of the obtained voltage difference. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a transformer operation control circuit and operation control system, which can avoid asynchronous closing and risks during operation, while also improving work efficiency.

[0005] In a first aspect, this utility model provides a transformer operation control circuit, comprising:

[0006] First busbar, second busbar, third busbar, fourth busbar, first transformer, second transformer, first switch, second switch, third switch, first voltage detection device, second voltage detection device, third voltage detection device and closing control device;

[0007] The first busbar, the first transformer, the first switch, and the second busbar are connected in series, and the third busbar, the second transformer, the second switch, and the fourth busbar are connected in series. The third switch is connected between the second busbar and the fourth busbar. The closing control device is connected to the first switch, the second switch, and the third switch, and is also connected to the first voltage detection device, the second voltage detection device, and the third voltage detection device.

[0008] The first voltage detection device is connected to both ends of the first switch and is used to detect a first voltage difference between the two ends of the first switch; the second voltage detection device is connected to both ends of the second switch and is used to detect a second voltage difference between the two ends of the second switch; the third voltage detection device is connected to both ends of the third switch and is used to detect a third voltage difference between the two ends of the third switch.

[0009] When the closing control device receives a first closing trigger command and a first voltage difference less than or equal to a preset difference, it controls the first switch to close; when the closing control device receives a second closing trigger command and a second voltage difference less than or equal to a preset difference, it controls the second switch to close; when the closing control device receives a third closing trigger command and a third voltage difference less than or equal to a preset difference, it controls the third switch to close.

[0010] In some embodiments, the closing control device outputs a first level to the first switch, the second switch, and the third switch, and the first switch, the second switch, and the third switch are closed;

[0011] The closing control device outputs a second level to the first switch, the second switch, and the third switch, and the first switch, the second switch, and the third switch are disconnected.

[0012] In some embodiments, the transformer operation control circuit further includes:

[0013] A fourth switch and a fifth switch; the fourth switch is connected between the first busbar and the first transformer, and the fifth switch is connected between the third busbar and the second transformer.

[0014] In some embodiments, the first switch, the second switch, and the third switch are all transistor switches.

[0015] In some embodiments, the closing control device includes a first control terminal, a second control terminal, and a third control terminal;

[0016] The first control terminal is connected to the control terminal of the first switch, the second control terminal is connected to the control terminal of the second switch, and the third control terminal is connected to the control terminal of the third switch.

[0017] In some embodiments, the closing control device includes a closing trigger unit and a control unit, wherein the closing trigger unit and the control unit are connected.

[0018] The closing trigger unit is used to receive the closing operation and output the closing trigger command to the control unit. The control unit is connected to the first switch, the second switch and the third switch respectively.

[0019] The control unit is also connected to the first voltage detection device, the second voltage detection device, and the third voltage detection device, respectively.

[0020] In some embodiments, the transformer operation control circuit further includes:

[0021] The power supply equipment is electrically connected to the first busbar and the third busbar respectively.

[0022] In some embodiments, both the first transformer and the second transformer are dry-type transformers.

[0023] Secondly, this utility model also provides a transformer operation control system, including the transformer operation control circuit as described in the first aspect.

[0024] In some embodiments, the transformer operation control system further includes:

[0025] First and second devices awaiting power supply;

[0026] The first device to be powered is connected to the second busbar, and the second device to be powered is connected to the fourth busbar.

[0027] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0028] The transformer operation control circuit provided in this embodiment of the utility model includes: a first busbar, a second busbar, a third busbar, a fourth busbar, a first transformer, a second transformer, a first switch, a second switch, a third switch, a first voltage detection device, a second voltage detection device, a third voltage detection device, and a closing control device; the first busbar, the first transformer, the first switch, and the second busbar are connected in series, and the third busbar, the second transformer, the second switch, and the fourth busbar are connected in series; the third switch is connected between the second busbar and the fourth busbar; the closing control device is connected to the first switch, the second switch, and the third switch respectively, and the closing control device is also connected to the first voltage detection device, the second voltage detection device, and the third voltage detection device respectively. The system includes the following connections: a first voltage detection device connected to both ends of a first switch to detect a first voltage difference; a second voltage detection device connected to both ends of a second switch to detect a second voltage difference; and a third voltage detection device connected to both ends of a third switch to detect a third voltage difference. A closing control device is used to control the first switch to close when it receives a first closing trigger command and the first voltage difference is less than or equal to a preset difference; the closing control device controls the second switch to close when it receives a second closing trigger command and the second voltage difference is less than or equal to a preset difference; and the closing control device controls the third switch to close when it receives a third closing trigger command and the third voltage difference is less than or equal to a preset difference. This embodiment of the invention uses voltage detection devices to detect the voltage difference across each switch in real time. The closing control device then obtains this voltage difference, which helps ensure the accuracy of the voltage difference across each switch, avoids the risks of manual operation, and improves work efficiency. Finally, by combining the voltage difference with the preset difference and the closing trigger command, the corresponding switch is controlled to close. Therefore, this utility model embodiment can avoid asynchronous closing and risks during operation, while improving work efficiency. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the structure of a transformer operation control system provided in an embodiment of this utility model;

[0032] Figure 2A schematic diagram of another transformer operation control system provided in this embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of another transformer operation control system provided in an embodiment of the present utility model.

[0034] Among them, 010 is the transformer operation control circuit; 01 is the first busbar; 02 is the second busbar; 03 is the third busbar; 04 is the fourth busbar; 11 is the first transformer; 12 is the second transformer; 21 is the first switch; 22 is the second switch; 23 is the third switch; 31 is the first voltage detection device; 32 is the second voltage detection device; 33 is the third voltage detection device; 40 is the closing control device; 001 is the first standby power supply device; 002 is the second standby power supply device; 42 is the closing trigger unit; and 41 is the control unit. Detailed Implementation

[0035] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of this utility model can be combined with each other.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0037] The transformer operation control circuit provided in this embodiment includes a voltage detection device. This device can detect the voltage difference across each switch in real time. The closing control device then acquires this voltage difference, ensuring the accuracy of the voltage difference measurements across each switch. This avoids the risks associated with manual operation and improves work efficiency. Subsequently, by combining the voltage difference with a preset value and a closing trigger command, the corresponding switch is controlled to close. Therefore, this embodiment avoids asynchronous closing and operational risks while improving work efficiency.

[0038] The transformer operation control circuit and operation control system provided in the embodiments of this utility model will be described exemplarily below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of a transformer operation control system provided as an embodiment of the present utility model. Figure 1As shown, the transformer operation control system includes a transformer operation control circuit 010, which includes: a first busbar 01, a second busbar 02, a third busbar 03, a fourth busbar 04, a first transformer 11, a second transformer 12, a first switch 21, a second switch 22, a third switch 23, a first voltage detection device 31, a second voltage detection device 32, a third voltage detection device 33, and a closing control device 40; the first busbar 01, the first transformer 11, the first switch 21, and the second busbar 02 are connected in series, and the third busbar 03, the second transformer 12, the second switch 22, and the fourth busbar 04 are connected in series; the third switch 23 is connected between the second busbar 02 and the fourth busbar 04; the closing control device 40 is connected to the first switch 21, the second switch 22, and the third switch 23 respectively, and the closing control device 40 is also connected to the first voltage detection device 31, the second voltage detection device 32, the third voltage detection device 33, and the closing control device 40. The first voltage detection device 31, the second voltage detection device 32, and the third voltage detection device 33 are connected; the first voltage detection device 31 is connected to both ends of the first switch 21 and is used to detect the first voltage difference between the two ends of the first switch 21; the second voltage detection device 32 is connected to both ends of the second switch 22 and is used to detect the second voltage difference between the two ends of the second switch 22; the third voltage detection device 33 is connected to both ends of the third switch 23 and is used to detect the third voltage difference between the two ends of the third switch 23; the closing control device 40 is used to control the first switch 21 to close when it receives the first closing trigger command and the first voltage difference is less than or equal to a preset difference; the closing control device 40 controls the second switch 22 to close when it receives the second closing trigger command and the second voltage difference is less than or equal to a preset difference; the closing control device 40 controls the third switch 23 to close when it receives the third closing trigger command and the third voltage difference is less than or equal to a preset difference.

[0040] The first busbar 01 and the third busbar 03 can be 6kV busbars, and the second busbar 02 and the fourth busbar 04 can be 400V PC section busbars. The second busbar 02 is used to connect the first device to be powered 001, and the fourth busbar 04 is used to connect the second device to be powered 002, thereby supplying power to the first device to be powered 001 and the second device to be powered 002 through the second busbar 02 and the fourth busbar 04, respectively. The first transformer 11 and the second transformer 12 are step-down transformers.

[0041] Specifically, the high voltage transmitted on the first busbar 01 can be stepped down by the first transformer 11, and the electrical energy output from the first transformer 11 is then transmitted to the second busbar 02 via the first switch 21, supplying power to the first device 001. Similarly, the high voltage transmitted on the third busbar 03 can be stepped down by the second transformer 12, and the electrical energy output from the second transformer 12 is then transmitted to the fourth busbar 04 via the second switch 22, supplying power to the second device 002.

[0042] When power is supplied to the first device 001 and the second device 002 via the second busbar 02 and the fourth busbar 04 respectively, the third switch 23 is in the open state. Figure 1 When one of the transformers, such as the first transformer 11, fails, it cannot supply power to the first power supply device 001 connected to the second busbar 02. At this time, the second busbar 02 and the fourth busbar 04 can be connected by controlling the third switch 23 to provide normal power supply to the second power supply device 002 connected to the second busbar 02.

[0043] Specifically, in this embodiment of the invention, a voltage detection device is provided for each switch. Specifically, a first voltage detection device 31 is provided for the first switch 21, a second voltage detection device 32 is provided for the second switch 22, and a third voltage detection device 33 is provided for the third switch 23. Thus, the first voltage detection device 31 can detect a first voltage difference and transmit it to the closing control device 40; the second voltage detection device 32 can detect a second voltage difference and transmit it to the closing control device 40; and the third voltage detection device 33 can detect a third voltage difference and transmit it to the closing control device 40.

[0044] For example, when it is necessary to control the first switch 21 to close, the user can input a closing operation to the closing control device 40. The closing control device 40 can obtain the first closing trigger command, and then combine it with the first voltage difference across the first switch 21 detected by the first voltage detection device 31. When it is determined that the first voltage difference across the first switch 21 is less than or equal to a preset difference value, the closing control device 40 can output a control signal to the first switch 21 to control the first switch 21 to close. When it is necessary to control the second switch 22 to close, the user can input a closing operation to the closing control device 40. The closing control device 40 can obtain the second closing trigger command, and then combine it with the first voltage difference detected by the second voltage detection device 32. When the second voltage difference across the two switches 22 is less than or equal to a preset difference value, the closing control device 40 can output a control signal to the second switch 22 to control the second switch 22 to close. When it is necessary to control the closing of the third switch 23, the user can input a closing operation to the closing control device 40. The closing control device 40 can obtain the third closing trigger command, and then, combined with the third voltage difference across the third switch 23 detected by the third voltage detection device 33, when it is determined that the third voltage difference across the third switch 23 is less than or equal to a preset difference value, the closing control device 40 can output a control signal to the third switch 23 to control the third switch 23 to close.

[0045] Setting a preset difference can prevent asynchronous closing of the switch. For example, if the voltage difference across the third switch 23 is less than or equal to the preset difference, it ensures that the different power supplies across the third switch 23 are matched in terms of voltage, frequency, phase sequence, and phase, thereby ensuring the closing safety of the third switch 23. For instance, asynchronous closing of the third switch 23 may lead to risks such as an explosion.

[0046] In related technologies, for example, when closing the third switch 23, a person manually uses a detection device to measure the voltage difference across the third switch 23. Once the voltage difference is found to be less than or equal to a preset value, the person returns to the control room and operates the control module to close each switch. This causes inconvenience for non-professionals, potential risks to operators, and reduced work efficiency. Furthermore, since the voltage difference across the third switch 23 changes constantly, the voltage difference measured manually in the prior art (e.g., at the first moment) may differ from the voltage difference measured when the person returns to the control room (at the second moment), making it impossible to guarantee the accuracy of the voltage difference measurement.

[0047] Compared to related technologies, this embodiment of the invention, by setting up a voltage detection device, can detect the voltage difference across each switch in real time. The closing control device 40 then acquires this voltage difference, which helps ensure the accuracy of the voltage difference acquisition across each switch. This avoids the risks of manual operation and improves work efficiency. Subsequently, by combining the voltage difference with a preset difference value and a closing trigger command, the corresponding switch is controlled to close. Therefore, this embodiment of the invention avoids asynchronous closing and risks during operation while improving work efficiency.

[0048] In some embodiments, such as Figure 1 As shown, the closing control device 40 outputs a first level to the first switch 21, the second switch 22 and the third switch 23, and the first switch 21, the second switch 22 and the third switch 23 are closed;

[0049] The closing control device 40 outputs a second level to the first switch 21, the second switch 22 and the third switch 23, and the first switch 21, the second switch 22 and the third switch 23 are disconnected.

[0050] Specifically, the first level can be a high level, and the second level can be a low level. When the closing control device 40 outputs a high level to the first switch 21, the second switch 22, and the third switch 23, the first switch 21, the second switch 22, and the third switch 23 can be closed; when the closing control device 40 outputs a low level to the first switch 21, the second switch 22, and the third switch 23, the first switch 21, the second switch 22, and the third switch 23 can be opened.

[0051] In some implementations, the first level can be a low level and the second level can be a high level; when the closing control device 40 outputs a low level to the first switch 21, the second switch 22 and the third switch 23, the first switch 21, the second switch 22 and the third switch 23 can be closed; when the closing control device 40 outputs a high level to the first switch 21, the second switch 22 and the third switch 23, the first switch 21, the second switch 22 and the third switch 23 can be opened.

[0052] In some embodiments, such as Figure 1 As shown, the closing control device 40 may include a first control terminal A1, a second control terminal A2 and a third control terminal A3; the first control terminal A1 is connected to the control terminal B1 of the first switch 21, the second control terminal A2 is connected to the control terminal B2 of the second switch 22, and the third control terminal A3 is connected to the control terminal B3 of the third switch 23.

[0053] Specifically, in conjunction with the above embodiments, when the first control terminal A1 outputs a first level to the control terminal B1 of the first switch 21, the first switch 21 is closed; when the first control terminal A1 outputs a second level to the control terminal B1 of the first switch 21, the first switch 21 is opened.

[0054] When the second control terminal A2 outputs a first level to the control terminal B2 of the second switch 22, the second switch 22 is closed; when the second control terminal A2 outputs a second level to the control terminal B2 of the third switch 23, the second switch 22 is opened.

[0055] When the third control terminal A3 outputs the first level to the control terminal B3 of the third switch 23, the third switch 23 is closed; when the third control terminal A3 outputs the second level to the control terminal B3 of the third switch 23, the third switch 23 is open.

[0056] In some embodiments, Figure 2 A schematic diagram of another transformer operation control system provided as an embodiment of this utility model. (See diagram below.) Figure 2As shown, the closing control device 40 includes a closing trigger unit 42 and a control unit 41, which are connected together. The closing trigger unit 42 is used to receive the closing operation and output the closing trigger command to the control unit 41. The control unit 41 is connected to the first switch 21, the second switch 22 and the third switch 23 respectively. The control unit 41 is also connected to the first voltage detection device 31, the second voltage detection device 32 and the third voltage detection device 33 respectively.

[0057] Specifically, in this embodiment of the invention, when it is necessary to close the first switch 21, a closing operation is input to the closing trigger unit 42. The closing trigger unit 42 responds to the closing operation and outputs a closing trigger command control unit 41. Combined with the first voltage difference value detected by the first voltage detection device 31 obtained by the control unit 41, when the first voltage difference value is less than or equal to a preset difference value, the control unit 41 outputs a control signal, such as a first level, to the first switch 21, thereby controlling the first switch 21 to close. When it is necessary to close the second switch 22, a closing operation is input to the closing trigger unit 42. The closing trigger unit 42 responds to the closing operation and outputs a closing trigger command control unit 41. Combined with the first voltage difference value detected by the first voltage detection device 31, when the first voltage difference value is less than or equal to a preset difference value, the control unit 41 outputs a control signal, such as a first level, to the first switch 21, thereby controlling the first switch 21 to close. The second voltage difference detected by the second voltage detection device 32 is less than or equal to a preset difference. At this time, the control unit 41 outputs a control signal, such as a second level, to the second switch 22, thereby controlling the second switch 22 to close. When it is necessary to close the third switch 23, a closing operation is input to the closing trigger unit 42. The closing trigger unit 42 responds to the closing operation and outputs a closing trigger command to the control unit 41. Combined with the third voltage difference detected by the third voltage detection device 33 obtained by the control unit 41, when the third voltage difference is less than or equal to a preset difference, the control unit 41 outputs a control signal, such as a third level, to the third switch 23, thereby controlling the third switch 23 to close.

[0058] In some embodiments, continue as follows Figure 2 As shown, the transformer operation control circuit 010 also includes a fourth switch 24 and a fifth switch 25; the fourth switch 24 is connected between the first busbar 01 and the first transformer 11, and the fifth switch 25 is connected between the third busbar 03 and the second transformer 12.

[0059] Specifically, the fourth switch 24 and the fifth switch 25 can be connected to the closing control device 40 (not shown in the figure) respectively. The closing control device 40 controls the opening and closing of the fourth switch 24 and the fifth switch 25 to realize the circuit connection or disconnection between the first busbar 01 and the first transformer 11, and to realize the circuit connection or disconnection between the third busbar 03 and the second transformer 12.

[0060] In some embodiments, Figure 3This is a schematic diagram of another transformer operation control system provided as an embodiment of the present utility model. (See attached diagram.) Figure 3 As shown, the transformer operation control circuit 010 also includes a power supply device 10, which is electrically connected to the first busbar 01 and the third busbar 03 respectively.

[0061] In some embodiments, such as Figures 1-3 As shown in any of the figures, the first switch 21, the second switch 22, and the third switch 23 are all transistor switches. Specifically, in this embodiment, the first switch 21, the second switch 22, and the third switch 23 are all transistor switches, thereby achieving the advantages of having transistor switches. The transistor switches have the following advantages:

[0062] High switching speed: Transistor switches utilize electron migration to control conduction and cutoff, resulting in extremely fast switching speeds, typically reaching nanosecond or even picosecond levels. This allows for rapid signal switching in high-frequency circuits, meeting the demands of high-speed data processing and communication applications. For example, in a computer's CPU, transistor switches can quickly process high-frequency clock signals, enabling high-speed computation. High precision: The conduction and cutoff states of a transistor switch can be precisely controlled by adjusting the voltage or current at the base (for bipolar transistors) or gate (for field-effect transistors), enabling precise circuit control. In circuits requiring precise control, such as high-precision measuring instruments and CNC power supplies, transistor switches can accurately control signal on / off states and levels, ensuring system accuracy and stability. No mechanical wear: Unlike mechanical switches, transistor switches have no mechanical parts, eliminating the problems of mechanical wear and poor contact. Therefore, it has a longer service life and higher reliability, enabling stable operation in applications with frequent switching, reducing system downtime and maintenance costs due to switch failures. It is suitable for applications with extremely high reliability requirements, such as aerospace and industrial automation control. Low noise: Transistor switches do not generate mechanical vibrations or electric arcs during operation, resulting in a low noise level. This is crucial for noise-sensitive circuits, such as audio amplifiers and RF receivers, as it improves signal quality and system performance.

[0063] In other embodiments, the first switch 21, the second switch 22 and the third switch 23 may also be configured as circuit breaker switches, and this embodiment of the present invention does not specifically limit this.

[0064] In some embodiments, such as Figures 1-3 As shown in any of the figures, the first transformer 11 and the second transformer 12 are dry-type transformers.

[0065] Specifically, in this embodiment of the invention, the first transformer 11 and the second transformer 12 can be configured as dry-type transformers. Dry-type transformers typically use natural air cooling or forced air cooling for heat dissipation, and have good heat dissipation performance. By rationally designing the heat dissipation channels and using efficient heat dissipation materials, the heat generated during the operation and control of the transformer can be effectively dissipated, ensuring that the transformer operates within the normal temperature range, thereby improving the transformer's overload capacity and service life.

[0066] Based on the above embodiments, this utility model provides a transformer operation control system, including the transformer operation control circuit 010 as described in the above embodiments, and therefore has the same or corresponding beneficial effects, which will not be repeated here.

[0067] In some embodiments, such as Figures 1-3 As shown in any of the figures, the transformer operation control system further includes: a first power supply device 001 and a second power supply device 002; the first power supply device 001 is connected to the second busbar 02, and the second power supply device 002 is connected to the fourth busbar 04.

[0068] Therefore, the transformer operation control circuit and operation control system provided in this embodiment of the utility model install voltage detection devices at the upper and lower ports of the 400V PC section working power supply switching (first and second switches) and sectionalizing switch (third switch) to monitor the voltage difference between the upper and lower ports of the switches in real time and upload the monitored voltage difference values ​​to the background computer (closing control device) in real time. The background computer stores the closing logic of the working power supply incoming switch and sectionalizing switch, and adds an operation permission button to the closing permission logic of the 400V PC section working power supply incoming switch and sectionalizing switch in the public system. When it is necessary to close the 400V PC section working power supply incoming switch and sectionalizing switch, click the "Closing Permission" button in the DCS screen of the background computer, and then click the "Activate" button in the closing permission screen. When the voltage difference of the switches meets the switching conditions in real time, the closing permission condition is met, triggering the closing signal, thereby completing the closing of the 400V PC section working power supply incoming switch or sectionalizing switch.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the utility model herein.

Claims

1. A transformer operating control circuit, characterized by comprising: include: First busbar, second busbar, third busbar, fourth busbar, first transformer, second transformer, first switch, second switch, third switch, first voltage detection device, second voltage detection device, third voltage detection device and closing control device; The first busbar, the first transformer, the first switch, and the second busbar are connected in series, and the third busbar, the second transformer, the second switch, and the fourth busbar are connected in series. The third switch is connected between the second busbar and the fourth busbar. The closing control device is connected to the first switch, the second switch, and the third switch, and is also connected to the first voltage detection device, the second voltage detection device, and the third voltage detection device. The first voltage detection device is connected to both ends of the first switch and is used to detect the first voltage difference between the two ends of the first switch; The second voltage detection device is connected to both ends of the second switch and is used to detect the second voltage difference between the two ends of the second switch; The third voltage detection device is connected to both ends of the third switch and is used to detect the third voltage difference between the two ends of the third switch.

2. The transformer operating control circuit of claim 1, wherein, The closing control device includes a closing trigger unit and a control unit, and the closing trigger unit and the control unit are connected; The closing trigger unit is used to receive the closing operation and output the closing trigger command to the control unit. The control unit is connected to the first switch, the second switch and the third switch respectively. The control unit is also connected to the first voltage detection device, the second voltage detection device, and the third voltage detection device, respectively.

3. The transformer operating control circuit of claim 1, wherein, The closing control device outputs a first level to the first switch, the second switch, and the third switch, and the first switch, the second switch, and the third switch close. The closing control device outputs a second level to the first switch, the second switch, and the third switch, and the first switch, the second switch, and the third switch are disconnected.

4. The transformer operating control circuit of claim 1, wherein, The closing control device includes a first control terminal, a second control terminal, and a third control terminal; The first control terminal is connected to the control terminal of the first switch, the second control terminal is connected to the control terminal of the second switch, and the third control terminal is connected to the control terminal of the third switch.

5. The transformer operating control circuit of claim 1, wherein, Also includes: The fourth and fifth switches; The fourth switch is connected between the first busbar and the first transformer, and the fifth switch is connected between the third busbar and the second transformer.

6. The transformer operating control circuit of claim 1, wherein, Also includes: The power supply equipment is connected to the first busbar and the third busbar respectively.

7. The transformer operating control circuit of claim 1, wherein, The first switch, the second switch, and the third switch are all transistor switches.

8. The transformer operating control circuit of claim 1, wherein, Both the first transformer and the second transformer are dry-type transformers.

9. A transformer operation control system characterized by comprising: Includes a transformer operation control circuit as described in any one of claims 1-8.

10. The transformer operating control system of claim 9, wherein, Also includes: First and second devices awaiting power supply; The first device to be powered is connected to the second busbar, and the second device to be powered is connected to the fourth busbar.

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