Movable combined type transformer protection equipment and transformer protection system
By integrating multiple protection modules in the transformer protection equipment, monitoring and protecting multiple parameters of the transformer, the problems of functional dispersion and response lag of traditional transformer protection devices are solved, and more efficient transformer protection and monitoring are achieved.
Patent Information
- Application Number
- CN202411879896.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-04-29
AI Technical Summary
Traditional transformer protection devices have problems such as dispersed functions, lagging response and low integration, which are difficult to meet the needs of modern power systems.
A movable combined transformer protection device is designed, integrating differential protection module, high-voltage side backup protection module, medium- and low-voltage side backup protection module and non-power protection module. Through these modules, multiple parameters of the transformer are monitored and protected.
It realizes comprehensive protection of transformers, provides multi-dimensional protection functions and real-time monitoring capabilities, and improves the integration and response speed of the equipment.
Smart Images
Figure CN119905970A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electric power equipment, and in particular to a movable combined transformer protection device and a transformer protection system. Background Art
[0002] In the power system, transformers play an important role, and their stable operation is of great significance to ensure the safety and reliable power supply of the power grid. Therefore, transformers can be monitored through a variety of devices to ensure the stable operation of transformers.
[0003] In the related art, the traditional transformer protection device has problems such as dispersed functions, delayed response, low integration, etc., which makes it difficult to adapt to the needs of modern power systems. Therefore, there is an urgent need for a transformer protection device that can include multiple functions. Summary of the invention
[0004] Based on this, in order to solve the existing problem of urgently needing a transformer protection device that can include multiple functions, a movable combined transformer protection device and a transformer protection system are proposed.
[0005] In a first aspect, a movable combined transformer protection device is provided, the movable combined transformer protection device comprising: a differential protection module, a high voltage side backup protection module, a medium and low voltage side backup protection module and a non-electrical quantity protection module;
[0006] The differential protection module is used to provide differential quick-break protection and ratio braking differential protection for the transformer;
[0007] The high-voltage side backup protection module is used to monitor the high-voltage side function of the transformer, and the medium- and low-voltage side backup protection module is used to monitor the medium-voltage measurement function and the low-voltage side function;
[0008] The non-electrical quantity protection module is used to monitor the non-electrical quantity signal and issue an early warning according to the non-electrical quantity signal.
[0009] Optionally, the differential protection module is specifically used to obtain the high-voltage side current and the low-voltage side current, and perform differential quick-break protection on the transformer according to the current difference between the high-voltage side current and the low-voltage side current in combination with a preset differential quick-break setting value;
[0010] The differential protection module is also specifically used to perform ratio braking differential protection on the transformer according to the current difference, a preset differential starting constant, and a preset ratio braking coefficient.
[0011] Optionally, the high-voltage side backup protection module is specifically used to monitor the three-phase current on the high-voltage side of the transformer, and perform time-limited quick-trip protection on the transformer according to the three-phase current on the high-voltage side.
[0012] Optionally, the medium and low voltage side backup protection module is specifically used to monitor the bus voltage of the transformer, and perform a bus grounding alarm on the transformer according to the bus voltage;
[0013] The medium and low voltage side backup protection module is also specifically used to monitor the three-phase current on the medium voltage side of the transformer or the three-phase current on the low voltage side of the transformer, and perform time-limited quick-break protection on the transformer according to the three-phase current on the medium voltage side or the three-phase current on the low voltage side.
[0014] Optionally, the non-electrical protection module is specifically used to monitor the temperature, fan, oil level, loaded light gas signal and main body light gas signal of the transformer, and generate a warning signal when the temperature is abnormal, the fan is abnormal or the oil level is abnormal, or generate the warning signal when the loaded light gas signal or the main body light gas signal is detected;
[0015] The non-electrical protection module is also specifically used to control the transformer to trip when a load gas signal, a body weight gas signal, a pressure release signal or a cooler shutdown signal is detected, or to control the transformer to trip when the temperature difference between the temperature and a preset temperature threshold is detected to be greater than a preset difference threshold.
[0016] Optionally, electrical isolation is achieved among the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, and the non-electrical quantity protection module.
[0017] Optionally, the movable combined transformer protection device also includes: a communication interface, which is used to obtain multiple data of the transformer and input the multiple data into the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module or the non-electrical protection module, and the multiple data are used to indicate the status of the transformer.
[0018] Optionally, the movable combined transformer protection device further includes: a modular interface, and the modular interface is used to connect to the transformer.
[0019] Optionally, the movable combined transformer protection device further includes: a display screen, the display screen is used to display a warning signal or a tripping signal, the warning signal is used to alert a user, and the tripping signal is used to remind a user that the transformer has tripped.
[0020] In a second aspect, a transformer protection system is provided, the transformer protection system comprising: a movable combined transformer protection device and a transformer;
[0021] The movable combined transformer protection device is connected to the transformer via a modular interface, and performs data communication with the transformer via a pre-set communication interface;
[0022] After the movable combined transformer protection device receives multiple data of the transformer through the communication interface, the movable combined transformer protection device forwards the multiple data to the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, and the non-electrical quantity protection module, and protects the transformer through the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, or the non-electrical quantity protection module, and the multiple data are used to indicate the status of the transformer.
[0023] In a third aspect, a movable combined transformer protection device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following steps:
[0024] The movable combined transformer protection device is connected to the transformer via a modular interface, and performs data communication with the transformer via a pre-set communication interface;
[0025] After the movable combined transformer protection device receives the multiple data of the transformer through the communication interface, the movable combined transformer protection device forwards the multiple data to the differential protection module, the high-voltage side backup protection module, the medium-low voltage side backup protection module and the non-electrical quantity protection module, and protects the transformer through the differential protection module, the high-voltage side backup protection module, the medium-low voltage side backup protection module or the non-electrical quantity protection module, and the multiple data are used to indicate the state of the transformer. By arranging the differential protection module, the high-voltage side backup protection module, the medium-low voltage side backup protection module and the non-electrical quantity protection module in the movable combined transformer protection device, multiple parameters of the transformer can be monitored through each module, so that the transformer can be fully protected. By integrating multiple protection modules in the movable combined transformer protection device, a set of fully functional, compact and easy-to-operate movable combined transformer protection equipment is obtained, which can provide multi-dimensional protection functions and real-time monitoring capabilities for the transformer.
[0026] In a fourth aspect, a computer-readable storage medium is provided, storing a computer program, wherein when the computer program is executed by a processor, the processor performs the following steps:
[0027] The movable combined transformer protection device is connected to the transformer via a modular interface, and performs data communication with the transformer via a pre-set communication interface;
[0028] After the movable combined transformer protection device receives multiple data of the transformer through the communication interface, the movable combined transformer protection device forwards the multiple data to the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, and the non-electrical quantity protection module, and protects the transformer through the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, or the non-electrical quantity protection module, and the multiple data are used to indicate the status of the transformer.
[0029] The movable combined transformer protection device provided in the embodiment of the present application can monitor multiple parameters of the transformer through each module by setting a differential protection module, a high-voltage side backup protection module, a medium- and low-voltage side backup protection module, and a non-electrical quantity protection module in the movable combined transformer protection device, so that the transformer can be fully protected. By integrating multiple protection modules in the movable combined transformer protection device, a set of fully functional, compact, and easy-to-operate movable combined transformer protection devices is obtained, which can provide multi-dimensional protection functions and real-time monitoring capabilities for the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0031] in:
[0032] Figure 1 A system schematic diagram of a transformer protection system involved in a movable combined transformer protection device provided in an embodiment of the present application;
[0033] Figure 2 A schematic structural diagram of a movable combined transformer protection device provided in an embodiment of the present application;
[0034] Figure 3 An internal structure diagram of a movable combined transformer protection device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0036] The transformer is the core equipment of the power system, and its safety is directly related to the stability of the power grid operation. Traditional transformer protection devices have problems such as decentralized functions, delayed response, and low integration, which makes it difficult to adapt to the needs of modern power systems. Therefore, designing an intelligent transformer protection screen that integrates multiple protection functions can effectively improve the comprehensiveness and intelligence level of equipment protection, which is of great significance.
[0037] The embodiment of the present application provides a movable combined transformer protection device. By setting a differential protection module, a high-voltage side backup protection module, a medium- and low-voltage side backup protection module, and a non-electrical quantity protection module in the movable combined transformer protection device, multiple parameters of the transformer can be monitored through each module, so that the transformer can be fully protected. By integrating multiple protection modules in the movable combined transformer protection device, a set of fully functional, compact, and easy-to-operate movable combined transformer protection devices is obtained, which can provide multi-dimensional protection functions and real-time monitoring capabilities for the transformer.
[0038] Figure 1 A schematic diagram of a transformer protection system for a movable combined transformer protection device according to an embodiment of the present application. Figure 1 The transformer protection system includes: a movable combined transformer protection device 10 and a transformer 20.
[0039] The movable combined transformer protection device 10 can be connected to the transformer 20 via a modular interface 101 , and perform data communication with the transformer 20 via a preset communication interface 102 .
[0040] Correspondingly, after the mobile combined transformer protection device 10 receives multiple data of the transformer through the communication interface 102, the mobile combined transformer protection device 10 can then forward the multiple data to the differential protection module 103, the high-voltage side backup protection module 104, the medium- and low-voltage side backup protection module 105, and the non-electrical quantity protection module 106, and protect the transformer 20 through the differential protection module 103, the high-voltage side backup protection module 104, the medium- and low-voltage side backup protection module 105, and the non-electrical quantity protection module 106.
[0041] Among them, multiple data are used to indicate the state of the transformer 20. For example, the multiple data may include: at least one of the following data: three-phase current on the high voltage side, three-phase current on the medium voltage side, three-phase current on the low voltage side, temperature, fan, oil level, light gas signal on load and light gas signal of the main body, heavy gas signal on load, heavy gas signal of the main body, pressure release signal and cooler shutdown signal.
[0042] Further, see Figure 2 , Figure 2 A structural diagram of a movable combined transformer protection device provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the movable combined transformer protection device may include: a differential protection module 201, a high-voltage side backup protection module 202, a medium- and low-voltage side backup protection module 203, a non-electrical protection module 204, a protection compartment front door 205, a protection compartment rear door 206, a protection compartment air conditioner 207, a protection compartment front door observation glass window 208 and a movable handle 209.
[0043] Among them, the differential protection module 201 is used to provide differential quick-break protection and ratio braking differential protection for the transformer; the high-voltage side backup protection module 202 is used to monitor the high-voltage side function of the transformer; the medium- and low-voltage side backup protection module 203 is used to monitor the medium-voltage measurement function and the low-voltage side function; the non-electrical quantity protection module 204 is used to monitor non-electrical quantity signals and issue early warnings based on non-electrical quantity signals.
[0044] In an optional embodiment, the differential protection module 201 can obtain the high-voltage side current and the low-voltage side current of the transformer, and perform calculations based on the high-voltage side current and the low-voltage side current to obtain the current difference between the high-voltage side current and the low-voltage side current, and then perform differential quick-break protection on the transformer in combination with a pre-set differential quick-break setting value.
[0045] The current difference is used to represent the differential current between the high-voltage side current and the low-voltage side current.
[0046] For example, if the current difference is I d , the differential speed determination value is I sd , the differential protection module 201 can compare the current difference I d and differential speed determination value I sd If the current difference I d Greater than differential speed determination value I sd , the differential protection module 201 can perform differential quick-break protection on the transformer, control the transformer to trip, or generate an early warning signal. d It can be any phase current among the three-phase current.
[0047] Similarly, the differential protection module 201 can also perform ratio braking differential protection on the transformer according to the current difference, the preset differential starting constant value, and the preset ratio braking coefficient.
[0048] For example, if the current difference is I d , the differential starting setting is I qd , the ratio braking coefficient is K bl , the differential protection module 201 can compare the current difference I d With differential starting setting I qd If the current difference I d Greater than differential starting setting I qd , the differential protection module 201 can perform ratio braking differential protection on the transformer so that the current difference I after reaching the inflection point d Satisfy the preset size relationship.
[0049] The preset size relationship may be: d >I qd +K bl (I r -I eg ), where K bl is the ratio braking coefficient, I r is the braking current, I eg is the inflection point current constant.
[0050] In an optional embodiment, the high-voltage side backup protection module 202 can monitor the three-phase current on the high-voltage side of the transformer, and perform time-limited quick-break protection on the transformer according to the three-phase current on the high-voltage side. When any phase current of the three-phase current on the high-voltage side is greater than a preset time-limited blocking value, the transformer can be controlled to perform time-limited quick-break protection.
[0051] Furthermore, when the high-voltage side backup protection module 202 performs the time-limited quick-break protection, the time-limited quick-break protection can be delayed, so that the transformer can perform different actions according to different delays. For example, the high-voltage side backup protection module 202 can control the transformer to trip to the high-voltage side, or control the transformer to trip to the low-voltage side, or control the transformer to generate an accident signal to remind the user that the transformer has a fault.
[0052] In addition, the high-voltage side backup protection module 202 can also perform compound voltage startup protection on the transformer. It makes judgments based on the three-phase current on the high-voltage side and multiple other data of the transformer (such as transformer power). After different delays, it controls the transformer to trip to the high-voltage side, or trip to the low-voltage side, or generate an accident signal.
[0053] In an optional embodiment, the medium and low voltage side backup protection module 203 can monitor the bus voltage of the transformer and, based on the bus voltage, perform a bus grounding alarm on the transformer. When the bus voltage is greater than a preset bus grounding set value, a bus grounding alarm can be triggered, and after a bus grounding alarm delay, an early warning signal can be generated.
[0054] Similarly, the medium and low voltage side backup protection module 203 can also monitor the three-phase current on the medium voltage side of the transformer or the three-phase current on the low voltage side of the transformer, and perform time-limited quick-trip protection on the transformer based on the three-phase current on the medium voltage side or the three-phase current on the low voltage side.
[0055] For example, when any one of the three-phase currents on the medium voltage side or the three-phase currents on the low voltage side is greater than the corresponding time-limited quick-break value, the transformer can be protected by time-limited quick-break. After the time-limited quick-break delay, the transformer can be controlled to trip to the circuit breaker on this side, or the transformer can be controlled to generate an accident signal.
[0056] In an optional embodiment, the non-electrical protection module 204 can monitor multiple parameters such as the temperature, fan, oil level, loaded light gas signal and main body light gas signal of the transformer. When the temperature is abnormal, the fan is abnormal or the oil level is abnormal (the oil level is high or the oil level is low), the non-electrical protection module 204 generates a warning signal.
[0057] In addition, when the non-electrical protection module 204 detects a light gas signal on load or a light gas signal of the main body, a warning signal may also be generated.
[0058] However, in actual applications, signals of different severity may appear, and the non-electrical protection module 204 can trigger different protection measures according to different signals. For example, when the non-electrical protection module 204 detects a load gas signal, a body weight gas signal, a pressure release signal, or a cooler shutdown signal, the non-electrical protection module 204 can control the transformer to trip. Alternatively, when the non-electrical protection module 204 detects that the temperature difference between the temperature and the preset temperature threshold is greater than the preset difference threshold, the transformer can also be controlled to trip.
[0059] It should be noted that, in actual applications, in order to protect the independent operation of each protection module in the movable combined transformer protection device, each protection module can be electrically isolated, that is, the differential protection module 201, the high-voltage side backup protection module 202, the medium- and low-voltage side backup protection module 203 and the non-electrical protection module 204 are all electrically isolated in the movable combined transformer protection device.
[0060] Furthermore, the movable combined transformer protection device may further include: a communication interface.
[0061] Among them, the communication interface is used to obtain multiple data of the transformer and input multiple data to the differential protection module 201, the high voltage side backup protection module 202, the medium and low voltage side backup protection module 203 or the non-electrical protection module 204, and the multiple data are used to indicate the status of the transformer.
[0062] In addition, the movable combined transformer protection device may also include: a modular interface, which is used to connect to the transformer. The modular interface can support modular connection between the movable combined transformer protection device and the transformer, thereby facilitating the maintenance of the movable combined transformer protection device and facilitating the expansion of the movable combined transformer protection device, so that the movable combined transformer protection device can monitor other power equipment by adding new protection modules.
[0063] In addition, the movable combined transformer protection device may also include: a display screen, the display screen is used to display a warning signal or a tripping signal, the warning signal is used to warn the user, and the tripping signal is used to remind the user that the transformer has tripped.
[0064] In summary, the embodiment of the present application provides a movable combined transformer protection device, which can monitor multiple parameters of the transformer through each module by setting a differential protection module, a high-voltage side backup protection module, a medium- and low-voltage side backup protection module, and a non-electrical protection module in the movable combined transformer protection device, so that the transformer can be fully protected. By integrating multiple protection modules in the movable combined transformer protection device, a set of fully functional, compact, and easy-to-operate movable combined transformer protection devices is obtained, which can provide multi-dimensional protection functions and real-time monitoring capabilities for the transformer.
[0065] Figure 3 The internal structure diagram of a movable combined transformer protection device provided in an embodiment of the present application. The movable combined transformer protection device can be a terminal or a server. Figure 3 As shown, the portable combined transformer protection device includes a processor, a memory and a network interface connected via a system bus. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the portable combined transformer protection device stores an operating system and may also store a computer program. When the computer program is executed by the processor, the processor can implement the protection of the transformer. The internal memory may also store a computer program. When the computer program is executed by the processor, the processor can implement the protection of the transformer. Those skilled in the art will understand that Figure 3The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the movable combined transformer protection device to which the scheme of the present application is applied. The specific movable combined transformer protection device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.
[0066] In one embodiment, a movable combined transformer protection device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following steps:
[0067] The movable combined transformer protection device is connected to the transformer via a modular interface, and performs data communication with the transformer via a pre-set communication interface;
[0068] After the movable combined transformer protection device receives the multiple data of the transformer through the communication interface, the movable combined transformer protection device forwards the multiple data to the differential protection module, the high-voltage side backup protection module, the medium-low voltage side backup protection module and the non-electrical quantity protection module, and protects the transformer through the differential protection module, the high-voltage side backup protection module, the medium-low voltage side backup protection module or the non-electrical quantity protection module, and the multiple data are used to indicate the state of the transformer. By arranging the differential protection module, the high-voltage side backup protection module, the medium-low voltage side backup protection module and the non-electrical quantity protection module in the movable combined transformer protection device, multiple parameters of the transformer can be monitored through each module, so that the transformer can be fully protected. By integrating multiple protection modules in the movable combined transformer protection device, a set of fully functional, compact and easy-to-operate movable combined transformer protection equipment is obtained, which can provide multi-dimensional protection functions and real-time monitoring capabilities for the transformer.
[0069] In one embodiment, a computer-readable storage medium is provided, storing a computer program, wherein when the computer program is executed by a processor, the processor performs the following steps:
[0070] The movable combined transformer protection device is connected to the transformer via a modular interface, and performs data communication with the transformer via a pre-set communication interface;
[0071] After the movable combined transformer protection device receives multiple data of the transformer through the communication interface, the movable combined transformer protection device forwards the multiple data to the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, and the non-electrical quantity protection module, and protects the transformer through the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, or the non-electrical quantity protection module, and the multiple data are used to indicate the status of the transformer.
[0072] By setting a differential protection module, a high-voltage side backup protection module, a medium- and low-voltage side backup protection module, and a non-electrical quantity protection module in the movable combined transformer protection device, multiple parameters of the transformer can be monitored through each module, so that the transformer can be fully protected. By integrating multiple protection modules in the movable combined transformer protection device, a set of fully functional, compact, and easy-to-operate movable combined transformer protection equipment is obtained, which can provide multi-dimensional protection functions and real-time monitoring capabilities for the transformer.
[0073] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
[0074] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0075] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.
Claims
1. A movable combined transformer protection device, characterized in that: The movable combined transformer protection device comprises: a differential protection module, a high voltage side backup protection module, a medium and low voltage side backup protection module and a non-electrical quantity protection module; The differential protection module is used to provide differential quick-break protection and ratio braking differential protection for the transformer; The high-voltage side backup protection module is used to monitor the high-voltage side function of the transformer, and the medium- and low-voltage side backup protection module is used to monitor the medium-voltage measurement function and the low-voltage side function; The non-electrical quantity protection module is used to monitor the non-electrical quantity signal and issue an early warning according to the non-electrical quantity signal.
2. The movable combined transformer protection device according to claim 1 is characterized in that: The differential protection module is specifically used to obtain the high-voltage side current and the low-voltage side current, and perform differential fast-break protection on the transformer according to the current difference between the high-voltage side current and the low-voltage side current in combination with a preset differential fast-break setting value; The differential protection module is also specifically used to perform ratio braking differential protection on the transformer according to the current difference, a preset differential starting constant, and a preset ratio braking coefficient.
3. The movable combined transformer protection device according to claim 1 is characterized in that: The high-voltage side backup protection module is specifically used to monitor the three-phase current on the high-voltage side of the transformer, and perform time-limited quick-break protection on the transformer according to the three-phase current on the high-voltage side.
4. The movable combined transformer protection device according to claim 1 is characterized in that: The medium and low voltage side backup protection module is specifically used to monitor the bus voltage of the transformer and, according to the bus voltage, to perform a bus grounding alarm on the transformer; The medium and low voltage side backup protection module is also specifically used to monitor the three-phase current on the medium voltage side of the transformer or the three-phase current on the low voltage side of the transformer, and perform time-limited quick-break protection on the transformer according to the three-phase current on the medium voltage side or the three-phase current on the low voltage side.
5. The movable combined transformer protection device according to claim 1 is characterized in that: The non-electrical protection module is specifically used to monitor the temperature, fan, oil level, loaded light gas signal and main body light gas signal of the transformer, and generate a warning signal when the temperature is abnormal, the fan is abnormal or the oil level is abnormal, or when the loaded light gas signal or the main body light gas signal is detected, generate the warning signal; The non-electrical protection module is also specifically used to control the transformer to trip when a load gas signal, a body weight gas signal, a pressure release signal or a cooler shutdown signal is detected, or to control the transformer to trip when the temperature difference between the temperature and a preset temperature threshold is detected to be greater than a preset difference threshold.
6. The movable combined transformer protection device according to any one of claims 1 to 5, characterized in that: Electrical isolation is achieved among the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, and the non-electrical quantity protection module.
7. The movable combined transformer protection device according to any one of claims 1 to 5, characterized in that: The movable combined transformer protection device also includes: a communication interface, which is used to obtain multiple data of the transformer and input the multiple data into the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module or the non-electrical protection module, and the multiple data are used to indicate the status of the transformer.
8. The movable combined transformer protection device according to any one of claims 1 to 5, characterized in that: The movable combined transformer protection device further comprises: a modular interface, and the modular interface is used to connect with the transformer.
9. The movable combined transformer protection device according to any one of claims 1 to 5, characterized in that: The movable combined transformer protection device also includes: a display screen, which is used to display an early warning signal or a tripping signal, the early warning signal is used to warn the user, and the tripping signal is used to remind the user that the transformer has tripped.
10. A transformer protection system, characterized in that: The transformer protection system comprises: a movable combined transformer protection device and a transformer; The movable combined transformer protection device is connected to the transformer via a modular interface, and performs data communication with the transformer via a pre-set communication interface; After the movable combined transformer protection device receives multiple data of the transformer through the communication interface, the movable combined transformer protection device forwards the multiple data to the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, and the non-electrical quantity protection module, and protects the transformer through the differential protection module, the high-voltage side backup protection module, the medium- and low-voltage side backup protection module, or the non-electrical quantity protection module, and the multiple data are used to indicate the status of the transformer.