Transformer redundancy control system

Abstract

The invention relates to the technical field of electrical equipment, and discloses a transformer redundancy control system, comprising: transformers including a first transformer and a second transformer; the data acquisition module is used for acquiring operation data of the transformer in a working state, and the operation data comprises current, voltage and temperature of the transformer; the control switching module is used for judging whether to switch the transformer or not according to the operation data acquired by the data acquisition module and a preset switching mode, and the switching mode comprises a manual switching mode, a timing switching mode, a load switching mode and a fault switching mode; and the risk protection module is used for executing a protection instruction in the transformer switching process or when the operation is abnormal, and giving an alarm to remind an operator. Various transformer switching modes are set, diversified requirements are met, the service life of the transformer can be effectively prolonged by using the load switching mode to control the transformer, and resources can be effectively allocated by using the fault switching mode.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular, to a transformer redundant control system. Background Art

[0002] With the development of the economy and the growth of electricity demand, the power grid needs to be continuously expanded and upgraded. The switching of dual transformers can be part of the power grid upgrade. In actual production operation, due to changes in the production mode, there will be a phenomenon that the load carried by the transformer is relatively heavy. The transformer with a heavy load will also have certain potential safety hazards and have a negative impact on the service life of the corresponding equipment. In addition, when the production electricity is in a shutdown and maintenance state, it is completely possible to use a single transformer to carry the full-system load, and the other transformer is powered off and standby to achieve the purpose of energy conservation and consumption reduction.

[0003] However, during the process of implementing the inventive technical solution in the embodiments of the present application, the inventors of the present application found that the above technologies have at least the following technical problems:

[0004] When one transformer is under load, the other transformer cannot be started in time, or the start time is unreasonable, resulting in a long load time of the transformer, which not only affects the service life of the transformer, but also affects the stable operation of the power grid. The reliability of the control switching process of the dual-transformer switching directly affects the switching effect. If the parallel operation time is short, the load operation condition of the transformer cannot be solved. If the parallel operation time is long, it will cause unreasonable waste of resources. Summary of the Invention

[0005] The embodiments of the present invention provide a transformer redundant control system to solve the technical problem of inaccurate transformer redundant control in the prior art.

[0006] To achieve the above object, the present invention provides a transformer redundant control system, including:

[0007] A transformer, which includes a first transformer and a second transformer;

[0008] A data acquisition module, configured to acquire the operation data of the transformer in the working state, where the operation data includes transformer current, voltage, and temperature;

[0009] A control switching module, configured to determine whether to switch the transformer according to the operation data acquired by the data acquisition module and a preset switching mode, where the switching mode includes a manual switching mode, a timing switching mode, a load switching mode, and a fault switching mode;

[0010] A risk protection module, configured to execute a protection instruction during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator.

[0011] Further, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data collection module and a preset switching mode, including:

[0012] If the switching mode is preset as the manual switching mode, the operator is allowed to manually select the first transformer or the second transformer to operate.

[0013] Further, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data collection module and a preset switching mode, including:

[0014] If the switching mode is preset as the timing switching mode, a switching period is preset, and the operation duration of the currently operating transformer is obtained;

[0015] When the operation duration is greater than or equal to the switching period, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed.

[0016] Further, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data collection module and a preset switching mode, including:

[0017] If the switching mode is preset as the load switching mode, the operation data of the currently operating transformer at multiple moments is obtained, and the power impact factor is calculated:

[0018]

[0019] where β is the power impact factor, n is the number of moments, U i is the transformer voltage at the i-th moment, I i is the transformer current at the i-th moment, a is a coefficient that can be adjusted according to historical data, S 0 is the rated power of the transformer, which can be obtained from the transformer nameplate;

[0020] A preset transformer temperature threshold is set, and according to the operation data of the currently operating transformer at multiple moments, the difference between the transformer temperature and the transformer temperature threshold at each moment and the transformer temperature change rate at each moment are calculated to obtain the maximum temperature difference, the minimum temperature difference, the maximum temperature change rate, and the minimum temperature change rate;

[0021] According to the maximum temperature difference, the minimum temperature difference, the maximum temperature change rate, and the minimum temperature change rate, the temperature impact factor is calculated:

[0022]

[0023] where γ is the temperature impact factor, K 1is the maximum temperature difference, K 2 is the minimum temperature difference, b is a coefficient that can be adjusted according to historical data, m 1 is the maximum temperature change rate, m 2 is the minimum temperature change rate.

[0024] Further, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data acquisition module and a preset switching mode, including:

[0025] Calculate the load risk assessment coefficient according to the power impact factor and the temperature impact factor:

[0026] R = w 1 ×β + w 2 ×γ;

[0027] where R is the load risk assessment coefficient, w 1 is the power impact factor weight, with a value of 0.56, w 2 is the temperature impact factor weight, with a value of 0.44.

[0028] Further, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data acquisition module and a preset switching mode, including:

[0029] Preset a first risk coefficient, a second risk coefficient, a third risk coefficient, and a fourth risk coefficient, where the first risk coefficient is less than the second risk coefficient, the second risk coefficient is less than the third risk coefficient, and the third risk coefficient is less than the fourth risk coefficient;

[0030] Preset the first parallel operation duration, the second parallel operation duration, the third parallel operation duration, and the fourth parallel operation duration of the transformer;

[0031] If the load risk assessment coefficient is less than the first risk coefficient, it is determined that the operation state of the transformer is not switched;

[0032] If the load risk assessment coefficient is greater than or equal to the first risk coefficient and less than the second risk coefficient, select the first parallel operation duration as the parallel operation time of the transformer, and switch the operation state of the transformer after the parallel operation ends;

[0033] If the load risk assessment coefficient is greater than or equal to the second risk coefficient and less than the third risk coefficient, select the second parallel operation duration as the parallel operation time of the transformer, and switch the operation state of the transformer after the parallel operation ends;

[0034] If the load risk assessment coefficient is greater than or equal to the third risk coefficient and less than the fourth risk coefficient, then the third parallel operation duration is selected as the transformer parallel operation time, and the operation state of the transformer is switched after the parallel operation ends;

[0035] If the load risk assessment coefficient is greater than or equal to the fourth risk coefficient, then the fourth parallel operation duration is selected as the transformer parallel operation time, and the operation state of the transformer is switched after the parallel operation ends.

[0036] Further, the control switching module is used to determine whether to switch the transformer according to the operation data collected by the data acquisition module and a preset switching mode, including:

[0037] If the switching mode is preset as the fault switching mode, then a transformer current risk value, a voltage risk value, and a temperature risk value are preset;

[0038] Obtain the operation data of the currently operating transformer at the current moment;

[0039] If the current of the operating transformer at the current moment is greater than the current risk value, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed;

[0040] If the voltage of the operating transformer at the current moment is greater than the voltage risk value, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed;

[0041] If the temperature of the operating transformer at the current moment is greater than the temperature risk value, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed.

[0042] Further, the risk protection module is used to execute a protection instruction during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator, including:

[0043] If a fault occurs in the currently operating transformer in the load switching mode, the risk protection module shuts down the current faulty transformer, switches another transformer to the operating state, and issues a transformer fault alarm.

[0044] Further, the risk protection module is used to execute a protection instruction during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator, including:

[0045] When the current of the operating transformer at the current moment is greater than the current risk value, the risk protection module issues a current risk alarm;

[0046] When the voltage of the operating transformer at the current moment is greater than the voltage risk value, the risk protection module issues a voltage risk alarm;

[0047] When the temperature of the operating transformer at the current moment is greater than the temperature risk value, the risk protection module issues a temperature risk alarm.

[0048] Furthermore, the risk protection module is used to execute protection instructions during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator, including:

[0049] The risk protection module further includes a display screen. When the risk protection module issues an alarm, a reminder message is simultaneously displayed on the display screen.

[0050] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0051] The present invention discloses a transformer redundant control system, which provides multiple transformer redundant switching modes. Among them, the load switching mode can effectively monitor the load operation status of the currently operating transformer, and according to the operation data of the currently operating transformer, accurately start another transformer to operate in parallel, which can effectively protect the transformer, avoid potential safety hazards, improve the service life of the transformer. At the same time, the fault switching mode is added to keep only one transformer in operation in the low power consumption state, which not only ensures the reasonable allocation of resources, but also can automatically start another transformer when the operating transformer fails, ensuring the effective supply of electric energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to limit the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0053] Figure 1 The structural schematic diagram of a transformer redundant control system in an embodiment of the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention in detail. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0055] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0056] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0057] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0058] The following is a description of the preferred embodiments of the present invention in conjunction with the drawings.

[0059] As Figure 1 shown, the embodiments of the present invention disclose a transformer redundancy control system, including:

[0060] Transformers, including a first transformer and a second transformer;

[0061] A data acquisition module for acquiring the operation data of the transformer in the working state, and the operation data includes transformer current, voltage, and temperature;

[0062] A control switching module for determining whether to switch the transformer according to the operation data acquired by the data acquisition module and a preset switching mode, and the switching mode includes a manual switching mode, a timing switching mode, a load switching mode, and a fault switching mode;

[0063] A risk protection module for executing a protection instruction during the transformer switching process or when the operation is abnormal, and sending an alarm to remind the operator.

[0064] The beneficial effect of the above technical solution is that the operator can select a suitable switching mode according to actual needs.

[0065] In some embodiments of the present application, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data acquisition module and a preset switching mode, and includes:

[0066] When the switching mode is preset to the manual switching mode, the operator is allowed to manually select the first transformer or the second transformer to operate.

[0067] The beneficial effect of the above technical solution is that it is convenient for the operator to perform maintenance on one of them.

[0068] In some embodiments of the present application, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data acquisition module and a preset switching mode, and includes:

[0069] When the switching mode is preset to the timed switching mode, a switching period is preset, and the operation duration of the currently operating transformer is obtained;

[0070] When the operation duration is greater than or equal to the switching period, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed.

[0071] In this embodiment, if the switching period is set to x days, and if the first transformer is currently operating, then after x days, the first transformer is turned off and switched to the second transformer to enter the operating state, and the above steps are repeated.

[0072] In some embodiments of the present application, the control switching module is configured to determine whether to switch the transformer according to the operation data collected by the data acquisition module and a preset switching mode, and includes:

[0073] When the switching mode is preset to the load switching mode, the operation data of the currently operating transformer at multiple moments is obtained, and the power impact factor is calculated:

[0074]

[0075] where β is the power impact factor, n is the number of moments, U i is the transformer voltage at the i-th moment, I i is the transformer current at the i-th moment, a is a coefficient that can be adjusted according to historical data, S 0 is the rated power of the transformer, which can be obtained from the transformer nameplate;

[0076] A preset transformer temperature threshold is set, and according to the operation data of the currently operating transformer at multiple moments, the difference between the transformer temperature and the transformer temperature threshold and the transformer temperature change rate at each moment are calculated to obtain the maximum temperature difference, the minimum temperature difference, the maximum temperature change rate, and the minimum temperature change rate;

[0077] Calculate the temperature influence factor based on the maximum temperature difference, minimum temperature difference, maximum temperature change rate, and minimum temperature change rate:

[0078]

[0079] Among them, γ is the temperature influence factor, and K 1 is the maximum temperature difference, and K 2 is the minimum temperature difference. b is a coefficient that can be adjusted according to historical data, and m 1 is the maximum temperature change rate, and m 2 is the minimum temperature change rate.

[0080] In this embodiment, the operation data of the running transformer is monitored in real time to ensure that when the load operation state occurs, another transformer is turned on in time.

[0081] In this embodiment, the control switching module is used to determine whether to switch the transformer according to the operation data collected by the data acquisition module and the preset switching mode, including:

[0082] Calculate the load risk assessment coefficient based on the power influence factor and the temperature influence factor:

[0083] R = w 1 ×β + w 2 ×γ;

[0084] Among them, R is the load risk assessment coefficient, and w 1 is the power influence factor weight, with a value of 0.56, and w 2 is the temperature influence factor weight, with a value of 0.44.

[0085] In this embodiment, the control switching module is used to determine whether to switch the transformer according to the operation data collected by the data acquisition module and the preset switching mode, including:

[0086] Preset the first risk coefficient, second risk coefficient, third risk coefficient, and fourth risk coefficient, where the first risk coefficient is less than the second risk coefficient, the second risk coefficient is less than the third risk coefficient, and the third risk coefficient is less than the fourth risk coefficient;

[0087] Preset the first parallel operation duration, second parallel operation duration, third parallel operation duration, and fourth parallel operation duration of the transformer;

[0088] If the load risk assessment coefficient is less than the first risk coefficient, it is determined that the operation state of the transformer is not switched;

[0089] If the load risk assessment coefficient is greater than or equal to the first risk coefficient and less than the second risk coefficient, then the first parallel operation duration is selected as the transformer parallel operation time, and the operation state of the transformer is switched after the parallel operation ends;

[0090] If the load risk assessment coefficient is greater than or equal to the second risk coefficient and less than the third risk coefficient, then the second parallel operation duration is selected as the transformer parallel operation time, and the operation state of the transformer is switched after the parallel operation ends;

[0091] If the load risk assessment coefficient is greater than or equal to the third risk coefficient and less than the fourth risk coefficient, then the third parallel operation duration is selected as the transformer parallel operation time, and the operation state of the transformer is switched after the parallel operation ends;

[0092] If the load risk assessment coefficient is greater than or equal to the fourth risk coefficient, then the fourth parallel operation duration is selected as the transformer parallel operation time, and the operation state of the transformer is switched after the parallel operation ends.

[0093] In this embodiment, when the current load risk assessment coefficient corresponds to the second parallel operation duration, if the currently operating transformer is the first transformer, then the second transformer is first started to operate in parallel with the first transformer, and the parallel operation time is the second parallel operation duration. After reaching the second parallel operation duration, the first transformer is turned off, and the operation state of the second transformer is maintained; and the first parallel operation duration is less than the second parallel operation duration, the second parallel operation duration is less than the third parallel operation duration, and the third parallel operation duration is less than the fourth parallel operation duration.

[0094] The beneficial effects of the above technical solution are as follows: When one of the transformers is in load operation, another transformer is started to operate in parallel in a timely manner. After operating for a period of time, the transformer that has been in load operation is preferentially put into the sleep state, and the two transformers are in standby for each other, preventing a single transformer from always being in load operation, and effectively improving the service life of the transformer.

[0095] In some embodiments of the present application, the control switching module is used to determine whether to switch the transformer according to the operation data collected by the data acquisition module and the preset switching mode, including:

[0096] If the switching mode is preset to the fault switching mode, then the transformer current risk value, voltage risk value, and temperature risk value are preset;

[0097] Obtain the operation data of the currently operating transformer at the current moment;

[0098] If the current of the operating transformer at the current moment is greater than the current risk value, then it is determined that the transformer needs to be switched, and the transformer switching instruction is executed;

[0099] If the voltage of the transformer at the current moment during operation is greater than the voltage risk value, it is determined that the transformer needs to be switched, and the transformer switching instruction is executed;

[0100] If the temperature of the transformer at the current moment during operation is greater than the temperature risk value, it is determined that the transformer needs to be switched, and the transformer switching instruction is executed.

[0101] In this embodiment, if the currently operating transformer is the first transformer and the first transformer fails, it will automatically switch to the second transformer to enter the operating state, and at the same time, the first transformer will be shut down.

[0102] The beneficial effects of the above technical solution are: during the low electricity consumption period or during shutdown for maintenance, turning on one transformer for operation can effectively save resources, and at the same time, it can switch to another transformer in case of failure to ensure stable power supply.

[0103] In some embodiments of the present application, the risk protection module is used to execute protection instructions during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator, including:

[0104] If the currently operating transformer fails in the load switching mode, the risk protection module shuts down the current faulty transformer, switches another transformer to enter the operating state, and issues a transformer failure alarm.

[0105] In this embodiment, the risk protection module provides guarantee for the load switching mode, preventing failures during the transformer switching process from not being processed in time and affecting the normal power supply.

[0106] In some embodiments of the present application, the risk protection module is used to execute protection instructions during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator, including:

[0107] When the current of the transformer at the current moment during operation is greater than the current risk value, the risk protection module issues a current risk alarm;

[0108] When the voltage of the transformer at the current moment during operation is greater than the voltage risk value, the risk protection module issues a voltage risk alarm;

[0109] When the temperature of the transformer at the current moment during operation is greater than the temperature risk value, the risk protection module issues a temperature risk alarm.

[0110] The beneficial effects of the above technical solution are: in the fault switching mode, the risk protection module monitors the faults of the currently operating transformer and issues corresponding fault alarms according to different fault reasons, which is convenient for the operator to quickly repair.

[0111] In this embodiment, the risk protection module is used to execute protection instructions during the transformer switching process or when the operation is abnormal, and issue an alarm to remind the operator, including:

[0112] The risk protection module further includes a display screen. When the risk protection module issues an alarm, it simultaneously displays a reminder message on the display screen.

[0113] The beneficial effects of the above technical solution are: ensuring that the operator can understand the cause of the alarm in the first time and improving the maintenance efficiency of the transformer.

[0114] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0115] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way, and the situations of these combinations are not all described in this specification only for the consideration of saving space and resources.

[0116] Those of ordinary skill in the art can understand that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transformer redundant control system, characterized in that: include: A transformer, wherein the transformer comprises a first transformer and a second transformer; A data acquisition module, used to collect operating data of the transformer in a working state, wherein the operating data includes transformer current, voltage and temperature; A control switching module, used to determine whether to switch the transformer according to the operating data collected by the data acquisition module and a preset switching mode, wherein the switching mode includes a manual switching mode, a timed switching mode, a load switching mode and a fault switching mode; The risk protection module is used to execute protection instructions during transformer switching or abnormal operation, and issue an alarm to remind the operating personnel.

2. A transformer redundancy control system according to claim 1, characterized in that: The control switching module is used to determine whether to switch the transformer according to the operating data collected by the data collection module and the preset switching mode, including: If the switching mode is preset as the manual switching mode, the operator is allowed to manually select the first transformer or the second transformer for operation.

3. A transformer redundancy control system according to claim 1, characterized in that: The control switching module is used to determine whether to switch the transformer according to the operating data collected by the data collection module and the preset switching mode, including: If the switching mode is preset as the timed switching mode, a switching period is preset, and the operating time of the transformer currently in operation is obtained; When the operating time is greater than or equal to the switching period, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed.

4. A transformer redundancy control system according to claim 1, characterized in that: The control switching module is used to determine whether to switch the transformer according to the operating data collected by the data collection module and the preset switching mode, including: If the switching mode is preset as the load switching mode, the operation data of the transformer currently in operation at multiple times are obtained to calculate the power impact factor: Among them, β is the power impact factor, n is the number of moments, U i is the transformer voltage at the i-th moment, I i is the transformer current at the i-th moment, a is the coefficient which can be adjusted according to historical data, and S0 is the transformer rated power which can be obtained from the transformer nameplate; Preset the transformer temperature threshold, and calculate the difference between the transformer temperature at each moment and the transformer temperature threshold and the transformer temperature change rate at each moment according to the operating data of the transformer currently in operation at multiple moments, and obtain the maximum temperature difference, the minimum temperature difference, the maximum temperature change rate, and the minimum temperature change rate; The temperature influence factor is calculated according to the maximum temperature difference, the minimum temperature difference, the maximum temperature change rate, and the minimum temperature change rate: Among them, γ is the temperature influence factor, K1 is the maximum temperature difference, K2 is the minimum temperature difference, b is the coefficient, which can be adjusted according to historical data, m1 is the maximum temperature change rate, and m2 is the minimum temperature change rate.

5. A transformer redundancy control system according to claim 4, characterized in that: The control switching module is used to determine whether to switch the transformer according to the operating data collected by the data collection module and the preset switching mode, including: Calculate the load risk assessment coefficient based on the power impact factor and temperature impact factor: R = w1 × β + w2 × γ; Where R is the load risk assessment coefficient, w1 is the power impact factor weight, which is 0.56, and w2 is the temperature impact factor weight, which is 0.

44.

6. A transformer redundancy control system according to claim 5, characterized in that: The control switching module is used to determine whether to switch the transformer according to the operating data collected by the data collection module and the preset switching mode, including: Presetting a first risk factor, a second risk factor, a third risk factor, and a fourth risk factor, wherein the first risk factor is smaller than the second risk factor, the second risk factor is smaller than the third risk factor, and the third risk factor is smaller than the fourth risk factor; Presetting the first parallel operation time, the second parallel operation time, the third parallel operation time, and the fourth parallel operation time of the transformers; If the load risk assessment coefficient is less than the first risk coefficient, it is determined that the transformer operation state is not switched; If the load risk assessment coefficient is greater than or equal to the first risk coefficient and less than the second risk coefficient, the first parallel operation duration is selected as the transformer parallel operation time, and the transformer operation state is switched after the parallel operation ends; If the load risk assessment coefficient is greater than or equal to the second risk coefficient and less than the third risk coefficient, the second parallel operation duration is selected as the transformer parallel operation time, and the transformer operation state is switched after the parallel operation ends; If the load risk assessment coefficient is greater than or equal to the third risk coefficient and less than the fourth risk coefficient, the third parallel operation duration is selected as the transformer parallel operation time, and the transformer operation state is switched after the parallel operation ends; If the load risk assessment coefficient is greater than or equal to the fourth risk coefficient, the fourth parallel operation time is selected as the transformer parallel operation time, and the transformer operation state is switched after the parallel operation is completed.

7. A transformer redundancy control system according to claim 1, characterized in that: The control switching module is used to determine whether to switch the transformer according to the operating data collected by the data collection module and the preset switching mode, including: If the switching mode is preset as the fault switching mode, the transformer current risk value, voltage risk value, and temperature risk value are preset; Obtain the current operating data of the transformer in operation; If the current of the transformer in operation is greater than the current risk value, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed; If the voltage of the transformer in operation at the current moment is greater than the voltage risk value, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed; If the current temperature of the transformer in operation is greater than the temperature risk value, it is determined that the transformer needs to be switched, and a transformer switching instruction is executed.

8. A transformer redundancy control system according to claim 6, characterized in that: The risk protection module is used to execute protection instructions during the transformer switching process or when the transformer is operating abnormally, and issue an alarm to remind the operator, including: If a transformer currently in operation fails in the load switching mode, the risk protection module shuts down the current faulty transformer, switches another transformer into operation, and issues a transformer failure alarm.

9. A transformer redundancy control system according to claim 7, characterized in that: The risk protection module is used to execute protection instructions during the transformer switching process or when the transformer is operating abnormally, and issue an alarm to remind the operator, including: When the current of the transformer in operation is greater than the current risk value, the risk protection module issues a current risk alarm; When the voltage of the transformer in operation at the current moment is greater than the voltage risk value, the risk protection module issues a voltage risk alarm; When the current temperature of the transformer in operation is greater than the temperature risk value, the risk protection module issues a temperature risk alarm.

10. A transformer redundancy control system according to claim 1, characterized in that: The risk protection module is used to execute protection instructions during the transformer switching process or when the transformer is operating abnormally, and issue an alarm to remind the operator, including: The risk protection module also includes a display screen. When the risk protection module issues an alarm, it also displays a reminder message on the display screen.

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