Overload damage prevention system and method for distribution transformer

Abstract

The invention provides an anti-overload damage system and method for a distribution transformer, and the system comprises an anti-overload detection device which is disposed at a low-voltage outgoing line side of the distribution transformer, and is used for obtaining the side load information of the distribution transformer, and generating a transformer overload instruction when determining that the distribution transformer is in an overload state based on the side load information, the transformer overload instruction is transmitted to the first load control device in a wireless communication mode; a first load control device arranged on a branch line on one side of a distribution transformer receives a transformer overload instruction, and controls a first power supply switching module corresponding to the first load control device to switch a distribution transformer distribution mode corresponding to the first load control device side into a standby power supply distribution mode based on the transformer overload instruction. Power supply power of the distribution transformer is relieved, power failure caused by overload damage of the transformer is avoided, and continuous power distribution of power distribution user loads is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of overload of distribution transformers, and in particular to a system and method for preventing overload damage of distribution transformers. Background Art

[0002] With the development of power systems, the reliability of distribution network power supply and the safe operation of distribution equipment are becoming more and more important. At present, there are still some problems that need to be solved in the aspects of distribution network transformer overload protection and load remote control.

[0003] In the process of power transmission and distribution of the power system, the distribution transformer is an important electrical equipment. Whether it is an industrial enterprise, a shopping mall, an office building, or a residential area, it is necessary to use a distribution transformer to reduce the voltage and distribute electricity. In particular, the 10kV / 380V distribution transformer commonly used by power users plays an extremely important role in the distribution system. The configuration of the distribution transformer capacity is generally based on the sum of the equipment capacity of all power users. Since the power consumption time of users will not completely overlap, that is, the power loads will not be put into use at the same time, the simultaneous rate of user power consumption is often considered when designing the distribution transformer capacity. The distribution transformer capacity is configured by multiplying the sum of the equipment capacity of all power users by the simultaneous rate. The simultaneous rate is between 0 and 1 according to the actual power consumption. In this way, the capacity configuration of the distribution transformer is more economical. If the simultaneous rate is set to 1, the distribution transformer may be in a low-load operation state for a long time, the utilization rate is low, and the investment in the distribution network is large, which affects the economic efficiency of the distribution network construction. However, under certain special circumstances, most of the loads carried by the distribution transformer are put into operation at the same time in a short period of time, which will cause a sharp increase in the transformer load (such as the centralized start-up of air conditioners at noon in summer and the temporary heating equipment at night in winter), which will cause the transformer to overload. When the distribution transformer is overloaded beyond its allowable overload multiple or overload time, the distribution transformer will be severely overheated even if it is overloaded for a short period of time, which will cause the transformer to be damaged.

[0004] Distribution transformers are generally equipped with various protections, among which overload protection is an important protection unit to protect transformers from overload. It is achieved through the long-delay protection of the transformer low-voltage side outgoing circuit breaker. After the transformer overload protection device detects that the transformer load current exceeds the set value and setting time, it will disconnect the transformer low-voltage side circuit breaker and cut off the power supply load to prevent the transformer from overheating and burning the transformer windings and core due to long-term overload. Although the transformer overload protection can protect the transformer from damage due to overload, it will also cause the power supply load to be cut off. In order to prevent the problem of overload of power supply transformers, load control technology is widely used at home and abroad, that is, to monitor the power supply load of 10kV transformers. When the transformer load is found to be in an overloaded state, the preset single 380V load supplied by it is automatically cut off, thereby reducing the overall load of the power supply transformer and ensuring the operation of other loads. This method of controlling a single load to prevent transformer overload still cannot guarantee the continuity of power supply for all power users under the transformer. Moreover, there are many 380V loads within the power supply range of the distribution transformer. The single 380V load switch is often far away from the distribution transformer, and the transformer overload protection device must be installed on the low-voltage side of the transformer. It is also difficult to cut off a single load at a long distance when the transformer is overloaded. At present, there is no good way to solve the problem of continuous power supply to all power users when the distribution transformer is in a short-term overload state.

[0005] The overload of the distribution transformer is caused by the total power supply capacity being greater than the transformer capacity due to the simultaneous operation of all power supply loads. It is not the responsibility of any single power supply user. In a 10kV power supply area, the overload protection of the power supply transformer is often activated due to the normal operation of a single 380V load, causing all 380V power supply loads in the power supply area to be cut off, which often causes complaints from the user. If overload protection is not used, the transformer will overheat and burn due to long-term overload operation. This problem has been around for a long time and is universal. In some power supply areas, it has seriously affected the power supply of the distribution network.

[0006] In remote areas, the power supply users of the distribution network are far away, the number of single loads is large, the input and withdrawal of various loads are irregular, and the peak and trough difference of the load curve is large. It is common for 10kV power supply transformers to be overloaded in a certain period of time; and transformer overload will cause the temperature of the transformer oil tank to rise, and overload for more than 2 hours will cause the transformer winding to burn. Taking the 10kV power supply transformer in the sparsely loaded area as an example, the transformer failure caused by overload is increasing year by year. By setting up a transformer overload protection device, part of the power supply load is cut off when the transformer is overloaded, which can avoid the overload of the transformer. However, the overload protection device will cause part of the transformer power supply load to be cut off, affecting the power supply safety of users. In addition, the 380V load branch switch of the 10kV power supply area is far away from the transformer main switch. If the overload protection device cuts off the transformer load main switch, it will cause the entire power supply area to be cut off. The overload protection device can prevent the transformer from being damaged but greatly reduces the power supply continuity of the power supply users.

[0007] How to solve this problem is very important to improve the power supply reliability of distribution networks in remote areas, and it has very practical significance for the safety of power supply transformers and the reliability of power supply loads. Summary of the invention

[0008] In order to solve the problem of transformer damage caused by transformer overload in the prior art, the present invention proposes a distribution transformer overload damage prevention system and method to solve the above problem.

[0009] In a first aspect, a system for preventing overload damage to a distribution transformer is provided, comprising: an overload prevention detection device, a first load control device, and a first power supply switching module;

[0010] The overload prevention detection device is arranged on the low-voltage outlet side of the distribution transformer, and is used to obtain the load information of the distribution transformer side, and determine whether the distribution transformer is in an overload state based on the side load information, and generate a transformer overload instruction when it is in an overload state, and transmit the transformer overload instruction to the first load control device through wireless communication;

[0011] The first load control device is arranged on a branch line on one side of the low-voltage outlet side of the distribution transformer, and is used to receive the transformer overload instruction, and based on the transformer overload instruction, control the first power switching module corresponding to the first load control device to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode;

[0012] The first power switching module is located at the first load control device side and is electrically connected to the first load control device.

[0013] Preferably, the anti-overload detection device comprises:

[0014] An information acquisition module, used to acquire the three-phase voltage and three-phase current of the load on the distribution transformer side, and calculate the current distribution capacity of the distribution transformer based on the three-phase voltage and the three-phase current;

[0015] The overload detection module is used to determine whether the current distribution capacity exceeds the preset distribution capacity and whether the duration exceeds the preset time threshold, and when it is determined that the current distribution capacity exceeds the preset distribution capacity and the duration exceeds the preset time threshold, determine that the distribution transformer is in an overload state, generate a transformer overload instruction, and transmit the transformer overload instruction to the first load control device via wireless communication.

[0016] Preferably, the overload prevention detection device further includes:

[0017] The light load detection module is used to determine whether to generate a transformer light load instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode, and when the transformer light load instruction is generated, the transformer light load instruction is transmitted to the first load control device via wireless communication.

[0018] Preferably, the first power switching module includes:

[0019] A low-voltage AC contactor is used to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power supply distribution mode corresponding to the first load control device side according to the transformer overload instruction; and to switch the backup power supply distribution mode corresponding to the first load control device side to the distribution mode of the distribution transformer corresponding to the first load control device side according to the transformer light load instruction.

[0020] Preferably, the system further comprises: a second load control device and a second power switching module electrically connected;

[0021] A second load control device is arranged on a branch line on one side of the distribution transformer, and the second load control device and the first load control device are arranged on different branch lines on one side, and is used to receive the transformer overload instruction, and control the second power supply switching module to switch the distribution mode of the distribution transformer corresponding to the second load control device side to the backup power supply distribution mode based on the current transformer overload instruction;

[0022] The second power switching module is located on the second load control device side.

[0023] In a second aspect, a method for preventing overload damage to a distribution transformer is provided, comprising:

[0024] Obtain the side load information of the distribution transformer through an anti-overload detection device arranged on the low-voltage outlet side of the distribution transformer, and determine whether the distribution transformer is in an overload state based on the side load information, generate a transformer overload instruction when it is in an overload state, and transmit the transformer overload instruction to the first load control device through wireless communication;

[0025] The transformer overload instruction is received by a first load control device arranged on a branch line on one side of the distribution transformer, and based on the transformer overload instruction, a first power switching module corresponding to the first load control device is controlled to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power supply distribution mode;

[0026] Wherein, the first power switching module is located at the first load control device side and is electrically connected to the first load control device.

[0027] Preferably, after the first power switching module corresponding to the first load control device is controlled based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode, the method further includes:

[0028] Determine whether to generate a transformer light load instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode through the light load detection module of the anti-overload detection device, and when the transformer light load instruction is generated, transmit the transformer light load instruction to the first load control device through wireless communication;

[0029] The transformer light load instruction is received through the first load control device, and based on the transformer light load instruction, the first power switching module corresponding to the first load control device is controlled to switch the backup power supply distribution mode corresponding to the first load control device side to the distribution transformer distribution mode.

[0030] Preferably, after the first power switching module corresponding to the first load control device is controlled based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode, the method further includes:

[0031] Determine whether to generate a current transformer overload instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode through the overload detection module of the anti-overload detection device, and when the current transformer overload instruction is generated, transmit the current transformer overload instruction to the second load control device through wireless communication;

[0032] The current transformer overload instruction is received by a second load control device arranged on a branch route on one side of the distribution transformer, and based on the current transformer overload instruction, a second power supply switching module corresponding to the second load control device is controlled to switch the distribution mode of the distribution transformer corresponding to the second load control device side to the backup power supply distribution mode;

[0033] The second load control device and the first load control device are arranged on branch lines on different sides, and the second power supply switching module is located on the side of the second load control device and is electrically connected to the second load control device.

[0034] In a third aspect, the present application further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0035] The memory is used to store one or more programs;

[0036] When the one or more programs are executed by the at least one processor, a method for preventing overload damage to a distribution transformer as described above is implemented.

[0037] On the other hand, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed, the method for preventing overload damage to a distribution transformer as described above is implemented.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention provides a distribution transformer overload damage prevention system, comprising: an overload prevention detection device arranged on the low-voltage outlet side of the distribution transformer, used for obtaining the side load information of the distribution transformer, and generating a transformer overload instruction when determining that the distribution transformer is in an overload state based on the side load information, and transmitting the transformer overload instruction to a first load control device through a wireless communication method; a first load control device arranged on a branch line on one side of the distribution transformer receives the transformer overload instruction, and controls a first power switching module corresponding to the first load control device based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to a backup power supply distribution mode; the side load information of the distribution transformer is detected in real time by the overload prevention detection device, and it is determined whether to generate a transformer overload instruction based on the side load information, so as to avoid problems such as overheating and transformer damage caused by overload of the distribution transformer, and in case of overload, the transformer distribution is promptly switched to the backup power supply to alleviate the power supply power of the distribution transformer, avoid problems such as power failure caused by overload damage of the transformer, and ensure continuous distribution of the distribution user load. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the installation position of the distribution transformer overload damage prevention system of the present invention;

[0041] Figure 2 A schematic diagram of power switching of a system for preventing overload damage to a distribution transformer according to the present invention;

[0042] Figure 3 It is a flow chart of the method for preventing overload damage to a distribution transformer of the present invention;

[0043] Figure 4 The figure is a schematic diagram of the structure of an electronic device of the present invention. DETAILED DESCRIPTION

[0044] In order to better understand the present invention, the content of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0045] The present invention proposes a system and method for preventing overload damage to a distribution transformer. The system and method perform real-time detection of load information of the distribution transformer through an overload protection detection device, and generate an overload instruction in the event of an overload. Then, a first load control device performs timely switching of a backup power supply based on the overload instruction, thereby alleviating the power supply of the distribution transformer and avoiding problems such as transformer damage and power outages due to transformer overload.

[0046] In order to better understand the present invention, the content of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0047] Embodiment 1:

[0048] A distribution transformer overload damage prevention system, comprising: an overload prevention detection device, a first load control device and a first power supply switching module;

[0049] The overload prevention detection device is arranged on the low-voltage outlet side of the distribution transformer, and is used to obtain the load information of the distribution transformer side, and determine whether the distribution transformer is in an overload state based on the side load information, and generate a transformer overload instruction when it is in an overload state, and transmit the transformer overload instruction to the first load control device through wireless communication;

[0050] The first load control device is arranged on a branch line on one side of the low-voltage outlet side of the distribution transformer, and is used to receive the transformer overload instruction, and based on the transformer overload instruction, control the first power switching module corresponding to the first load control device to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode;

[0051] The first power switching module is located at the first load control device side and is electrically connected to the first load control device.

[0052] In one embodiment, the overload prevention detection device includes: an information acquisition module, which is used to obtain the three-phase voltage and the three-phase current of the load on the distribution transformer side, and calculate the current distribution capacity of the distribution transformer based on the three-phase voltage and the three-phase current;

[0053] The overload detection module is used to determine whether the current distribution capacity exceeds the preset distribution capacity and whether the duration exceeds the preset time threshold, and when it is determined that the current distribution capacity exceeds the preset distribution capacity and the duration exceeds the preset time threshold, determine that the distribution transformer is in an overload state and generate a transformer overload instruction.

[0054] In one embodiment, the overload protection detection device also includes: a light load detection module, which is used to determine whether to generate a transformer light load instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode, and when the transformer light load instruction is generated, the transformer light load instruction is transmitted to the first load control device via wireless communication.

[0055] The following is a detailed description of the distribution transformer overload damage prevention system in conjunction with specific embodiments:

[0056] like Figure 1 As shown, Figure 1 It is an installation diagram of the distribution transformer overload damage prevention system of the present invention. The 10kV power supply transformer reduces the voltage of the 10kV power supply line to 380V. A plurality of low-voltage circuit breakers are arranged on the 380V bus side to control the power supply of the corresponding low-voltage distribution line. Under the low-voltage distribution line controlled by each low-voltage circuit breaker, there are also various power supply branch lines, which are controlled to be disconnected by the branch low-voltage circuit breakers to form a 380V power supply network.

[0057] In order to ensure that the 10kV power supply transformer will not be overloaded, the present invention installs a transformer overload protection detection device on the 380V low-voltage outlet side of the 10kV distribution transformer. The overload protection detection device measures the three-phase voltage and three-phase current on the low-voltage side of the distribution transformer, calculates the power supply power of the transformer, and judges whether the distribution transformer enters an overload state according to the overload power setting value and the overload time setting value of the distribution transformer, and issues corresponding load control instructions.

[0058] In addition, a first load control device is installed behind the low-voltage circuit breaker of the 1-way power supply line on the 380V bus side, or behind the branch circuit breaker of the 1-way power supply line. The first load control device receives instructions from the transformer overload protection detection device, and when the distribution transformer is overloaded, starts the diesel generator (i.e., the backup power supply), cuts off the load of the power supply line controlled by it, and switches the power supply load to the diesel generator, thereby reducing the power supply power of the distribution transformer.

[0059] When the transformer overload protection detection device measures and calculates that the transformer power supply is lower than the transformer overload exit power setting and overload exit time setting, it issues a transformer light load control instruction again, and the first load control device switches the power supply line load it controls back to the distribution power supply line and shuts down the diesel generator power supply.

[0060] In one embodiment, the distribution transformer overload damage prevention system further includes: a second load control device and a second power switching module electrically connected;

[0061] A second load control device is arranged on a branch line on one side of the distribution transformer, and the second load control device and the first load control device are arranged on different branch lines on one side, and is used to receive the transformer overload instruction, and control the second power supply switching module to switch the distribution mode of the distribution transformer corresponding to the second load control device side to the backup power supply distribution mode based on the current transformer overload instruction;

[0062] The second power switching module is located on the second load control device side.

[0063] Specifically, after the distribution transformer is switched from the distribution transformer distribution mode to the backup power supply distribution mode, the anti-overload detection device again detects whether the distribution transformer is overloaded, and when it is determined that the distribution transformer is still overloaded, generates a transformer overload instruction, and transmits the transformer overload instruction to the second load control device on the other side branch line through wireless communication; the second load control device controls the corresponding second power switching module based on the transformer overload instruction to switch the distribution transformer power supply mode of the other side branch line to the backup power supply mode.

[0064] In one embodiment, the second power switching module includes:

[0065] A low-voltage AC contactor arranged on the second load control device side is electrically connected to the backup power supply on the second load control device side and the distribution transformer branch on the second load control device side, and is used to switch the distribution mode on the second load control device side based on the corresponding transformer overload instruction or transformer underload instruction.

[0066] In one embodiment, the first power switching module includes:

[0067] A low-voltage AC contactor is used to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power supply distribution mode corresponding to the first load control device side according to the transformer overload instruction; and to switch the backup power supply distribution mode corresponding to the first load control device side to the distribution transformer distribution mode corresponding to the first load control device side according to the transformer light load instruction. Figure 2 As shown, Figure 2 This is a schematic diagram of power switching of the distribution transformer overload protection system of the present invention. Figure 2 A detailed introduction to the switching of the power supply of the distribution transformer:

[0068] The 380VAC power supply from the distribution transformer grid and the 380VAC power supply from the diesel generator backup power supply are connected to a low-voltage AC contactor after passing through the circuit breaker. The 380VAC power supply from the grid is connected to the three-phase normally closed contacts of the AC contactor, and the 380VAC power supply from the diesel generator is connected to the three-phase normally closed contacts of the AC contactor. During normal operation, the two-way low-voltage AC circuit breaker (i.e., the second power switching module) is in a closed state. When the grid supplies power to the load, the AC contactor is in a normally closed state, and the three-phase contacts do not operate; when the diesel generator supplies power to the load, the remote load controller drives the AC contactor action coil, so that the three-phase contacts are attracted, the normally closed contacts of the AC contactor are disconnected, and the normally open contacts are closed.

[0069] Embodiment 2:

[0070] The present invention based on the same inventive concept also provides a method for preventing overload damage to a distribution transformer, comprising:

[0071] Step 1: Obtain the side load information of the distribution transformer through an overload prevention detection device arranged on the low-voltage outlet side of the distribution transformer, and determine whether the distribution transformer is in an overload state based on the side load information, generate a transformer overload instruction when it is in an overload state, and transmit the transformer overload instruction to the first load control device through wireless communication;

[0072] Step 2: receiving the transformer overload instruction through a first load control device arranged on a branch line on one side of the distribution transformer, and controlling the first power switching module corresponding to the first load control device to switch the distribution mode of the distribution transformer corresponding to the first load control device to the backup power distribution mode based on the transformer overload instruction;

[0073] Wherein, the first power switching module is located at the first load control device side and is electrically connected to the first load control device.

[0074] In this embodiment, after the first power switching module corresponding to the first load control device is controlled based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode, step 2 further includes:

[0075] Determine whether to generate a transformer light load instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode through the light load detection module of the anti-overload detection device, and when the transformer light load instruction is generated, transmit the transformer light load instruction to the first load control device through wireless communication;

[0076] The transformer light load instruction is received through the first load control device, and based on the transformer light load instruction, the first power switching module corresponding to the first load control device is controlled to switch the backup power supply distribution mode corresponding to the first load control device side to the distribution transformer distribution mode.

[0077] In this embodiment, after the first power switching module corresponding to the first load control device is controlled based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode, step 2 further includes:

[0078] Determine whether to generate a current transformer overload instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode through the overload detection module of the anti-overload detection device, and when the current transformer overload instruction is generated, transmit the current transformer overload instruction to the second load control device through wireless communication;

[0079] The current transformer overload instruction is received by a second load control device arranged on a branch route on one side of the distribution transformer, and based on the current transformer overload instruction, a second power supply switching module corresponding to the second load control device is controlled to switch the distribution mode of the distribution transformer corresponding to the second load control device side to the backup power supply distribution mode;

[0080] The second load control device and the first load control device are arranged on branch lines on different sides, and the second power supply switching module is located on the side of the second load control device and is electrically connected to the second load control device.

[0081] like Figure 3 As shown, Figure 3 The flow chart of the method for preventing overload damage to the distribution transformer of the present invention is as follows. Figure 3 A detailed introduction to the method of preventing overload damage to distribution transformers:

[0082] The load control terminal (i.e., the overload protection detection device) measures the three-phase voltage and three-phase current on the 380V low-voltage side of the transformer, calculates the actual power supply capacity of the 10kV transformer, and determines whether the transformer power supply capacity is greater than the overload setting value. If it is overloaded and the duration exceeds the setting value, it will issue a command to the 1# load control device (i.e., the first load control device) to start the diesel generator (i.e., the backup power supply), and the load will be switched to the diesel generator for power supply. Continue to measure the three-phase voltage and three-phase current on the 380V low-voltage side of the 10kV transformer, calculate the actual power supply capacity of the transformer, and determine whether the power supply capacity of the transformer is still overloaded after the 1# load control device is put into use. If it is no longer overloaded, continue to determine whether the power supply capacity of the transformer is lower than the light load setting value and the light load duration exceeds the setting value. If it enters the light load state, the 1# load control device can be cut off, the diesel generator can be exited, and the load is switched to the grid for power supply; if the 10kV transformer is still overloaded, an instruction is issued to the 2# load control device (i.e., the second load control device) to start the diesel generator, and the load is switched to the diesel generator for power supply, and continue to determine whether the power supply capacity of the transformer is still overloaded after the 2# load control device is put into use. If it is still overloaded, an alarm signal is issued. If the #2 load control device is put into the light load state, the 2# load control device can be cut off, the diesel generator can be exited, and the load is switched to the grid for power supply.

[0083] In one embodiment, the overload setting value of a 10kV transformer is generally set to 1.2 times the rated power supply capacity of the transformer, and the overload setting time is 60-120 seconds. The capacity of the diesel generator of the load control device is generally configured to be 0.2 times the rated power supply capacity of the transformer.

[0084] Example 3

[0085] like Figure 4 As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0086] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in a storage medium to implement the corresponding method flow or corresponding functions, so as to implement the steps of a method for preventing overload damage to a distribution transformer in the above-mentioned embodiment.

[0087] Example 4

[0088] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device for storing programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device and the extended storage medium supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a method for preventing overload damage to a distribution transformer in the above embodiment.

[0089] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0091] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0092] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0093] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A distribution transformer overload damage prevention system, characterized in that: include: An anti-overload detection device, a first load control device and a first power switching module; The overload prevention detection device is arranged on the low-voltage outlet side of the distribution transformer, and is used to obtain the load information of the distribution transformer side, and determine whether the distribution transformer is in an overload state based on the side load information, and generate a transformer overload instruction when it is in an overload state, and transmit the transformer overload instruction to the first load control device through wireless communication; The first load control device is arranged on a branch line on one side of the low-voltage outlet side of the distribution transformer, and is used to receive the transformer overload instruction, and based on the transformer overload instruction, control the first power switching module corresponding to the first load control device to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode; The first power switching module is located at the first load control device side and is electrically connected to the first load control device.

2. The system according to claim 1, characterized in that The anti-overload detection device comprises: An information acquisition module, used to acquire the three-phase voltage and three-phase current of the load on the distribution transformer side, and calculate the current distribution capacity of the distribution transformer based on the three-phase voltage and the three-phase current; The overload detection module is used to determine whether the current distribution capacity exceeds the preset distribution capacity and whether the duration exceeds the preset time threshold, and when it is determined that the current distribution capacity exceeds the preset distribution capacity and the duration exceeds the preset time threshold, determine that the distribution transformer is in an overload state, generate a transformer overload instruction, and transmit the transformer overload instruction to the first load control device via wireless communication.

3. The system according to claim 2, characterized in that The anti-overload detection device further includes: The light load detection module is used to determine whether to generate a transformer light load instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode, and when the transformer light load instruction is generated, the transformer light load instruction is transmitted to the first load control device via wireless communication.

4. The system according to claim 3, characterized in that The first power switching module includes: A low-voltage AC contactor is used to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power supply distribution mode corresponding to the first load control device side according to the transformer overload instruction; and to switch the backup power supply distribution mode corresponding to the first load control device side to the distribution mode of the distribution transformer corresponding to the first load control device side according to the transformer light load instruction.

5. The system according to claim 3, characterized in that Also includes: an electrically connected second load control device and a second power switching module; A second load control device is arranged on a branch line on one side of the distribution transformer, and the second load control device and the first load control device are arranged on different branch lines on one side, and is used to receive the transformer overload instruction, and control the second power supply switching module to switch the distribution mode of the distribution transformer corresponding to the second load control device side to the backup power supply distribution mode based on the current transformer overload instruction; The second power switching module is located on the second load control device side.

6. A method for preventing overload damage to a distribution transformer, characterized in that: include: Obtain the side load information of the distribution transformer through an anti-overload detection device arranged on the low-voltage outlet side of the distribution transformer, and determine whether the distribution transformer is in an overload state based on the side load information, generate a transformer overload instruction when it is in an overload state, and transmit the transformer overload instruction to the first load control device through wireless communication; The transformer overload instruction is received by a first load control device arranged on a branch line on one side of the distribution transformer, and based on the transformer overload instruction, a first power switching module corresponding to the first load control device is controlled to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power supply distribution mode; Wherein, the first power switching module is located at the first load control device side and is electrically connected to the first load control device.

7. The method according to claim 6, characterized in that: After the first power switching module corresponding to the first load control device is controlled based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode, the method further includes: Determine whether to generate a transformer light load instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode through the light load detection module of the anti-overload detection device, and when the transformer light load instruction is generated, transmit the transformer light load instruction to the first load control device through wireless communication; The transformer light load instruction is received through the first load control device, and based on the transformer light load instruction, the first power switching module corresponding to the first load control device is controlled to switch the backup power supply distribution mode corresponding to the first load control device side to the distribution transformer distribution mode.

8. The method according to claim 6, characterized in that After the first power switching module corresponding to the first load control device is controlled based on the transformer overload instruction to switch the distribution mode of the distribution transformer corresponding to the first load control device side to the backup power distribution mode, the method further includes: Determine whether to generate a current transformer overload instruction based on the side load information of the distribution transformer after the distribution mode of the distribution transformer is switched to the backup power supply distribution mode through the overload detection module of the anti-overload detection device, and when the current transformer overload instruction is generated, transmit the current transformer overload instruction to the second load control device through wireless communication; The current transformer overload instruction is received by a second load control device arranged on a branch route on one side of the distribution transformer, and based on the current transformer overload instruction, a second power supply switching module corresponding to the second load control device is controlled to switch the distribution mode of the distribution transformer corresponding to the second load control device side to the backup power supply distribution mode; The second load control device and the first load control device are arranged on branch lines on different sides, and the second power supply switching module is located on the side of the second load control device and is electrically connected to the second load control device.

9. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the method for preventing overload damage to a distribution transformer as claimed in claims 6 to 8 is implemented.

10. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, the method for preventing overload damage to the distribution transformer as described in claims 6 to 8 is implemented.

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