Method and device for processing small overcurrent based on intelligent fuse

Abstract

The present application provides a method and device for processing small overcurrents based on intelligent fuses, belonging to the technical field of circuit devices or systems for power supply or distribution in the high-end equipment industry. The photovoltaic server monitors the first current data and the first temperature data of the busbar box, DC cabinet, and centralized inverter in real time through the intelligent fuse; and determines whether there is a small overcurrent anomaly according to the first current data, rated current value, fusing parameter, first temperature data, and preset temperature rise rate. After detecting the existence of a small overcurrent anomaly, the location where the anomaly occurs is determined, and the controller at the location where the anomaly occurs is instructed to adjust the fusing current threshold of the intelligent fuse, avoiding the problem that traditional fuses cannot operate due to insufficient heat accumulation, greatly improving the protection ability against small overcurrents, thereby reducing the equipment damage rate and fault occurrence rate caused by small overcurrents in the photovoltaic system, and improving the overall stability of the photovoltaic system.

Description

Technical Field

[0001] This application belongs to the technical field of circuit devices or systems for power supply or power distribution in the high-end equipment industry, and particularly relates to a method and device for processing small overcurrents based on an intelligent fuse. Background Art

[0002] The photovoltaic system is exposed to the outdoor environment for a long time, and components and lines are vulnerable to natural factors, resulting in small overcurrent anomalies. Traditional fuses rely on heat accumulation generated by current to achieve fusing. Facing the above small overcurrents, a large amount of time is required to complete heat aggregation before they can operate.

[0003] In a photovoltaic system, such small overcurrents may persist without triggering the traditional fuse to trip, leading to potential hazards such as accelerated aging of line insulation, local overheating and burning of components, and even fire risks. Summary of the Invention

[0004] This application provides a method and device for processing small overcurrents based on an intelligent fuse. By using the intelligent fuse to real-time monitor the current data and temperature data in the photovoltaic system, it can respond to small overcurrent anomalies in a timely manner, avoiding the problem that traditional fuses cannot operate due to insufficient heat accumulation, greatly improving the protection ability against small overcurrents, and thus reducing the equipment damage rate and failure incidence rate caused by small overcurrents in the photovoltaic system.

[0005] In a first aspect, this application provides a method for processing small overcurrents based on an intelligent fuse, which is applied to a photovoltaic server of a photovoltaic system. The photovoltaic system includes solar photovoltaic modules, a busbar box connected to the solar photovoltaic modules, a DC cabinet connected to the busbar box, and a centralized inverter connected to the DC cabinet. The busbar box, the DC cabinet, and the centralized inverter all include a controller and an intelligent fuse. The intelligent fuse is used to collect current data and its own temperature data; the photovoltaic server is communicatively connected to the busbar box, the DC cabinet, and the centralized inverter; the method includes: receiving first current data and first temperature data from the busbar box, the DC cabinet, and the centralized inverter; and obtaining a preset rated current value, the fusing parameter of the intelligent fuse, and a preset heating rate; determining whether there is a small overcurrent anomaly according to the first current data, the first temperature data, the rated current value, the fusing parameter, and the preset heating rate; detecting the existence of the small overcurrent anomaly; determining the location where the anomaly occurs and generating a first control instruction; and sending the first control instruction to the controller at the location where the anomaly occurs, where the first control instruction is used to instruct the controller at the location where the anomaly occurs to adjust the fusing parameter.

[0006] In some embodiments, the fusing parameter includes a fusing current threshold and an abnormal current-carrying cumulative time. The detection of the small overcurrent anomaly includes: detecting that the duration for which the first current data exceeds the rated current value but does not exceed the fusing current threshold exceeds the abnormal current-carrying cumulative time; calculating the temperature rise rate based on the first temperature data; detecting that the temperature rise rate exceeds the preset temperature rise rate; and confirming the existence of the small overcurrent anomaly.

[0007] In some embodiments, the first current data and the first temperature data carry identification information. The determination of the anomaly occurrence location includes: obtaining the identification information of the first current data and the first temperature data detected to have a small overcurrent anomaly; and determining that the anomaly occurrence location is at least one of the busbar trunking unit, the DC cabinet, or the centralized inverter based on the identification information.

[0008] In some embodiments, the first control instruction is used to instruct the controller to reduce the fusing current threshold according to a preset fusing parameter adaptation table, and the fusing parameter adaptation table includes the abnormal current-carrying cumulative time corresponding to different current data, the default value of the fusing current threshold, and the adjusted value.

[0009] In some embodiments, the default value of the fusing current threshold is 1.1 - 1.45 times the rated current value; when the first current data is 1.1 - 1.25 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 90% - 100% of the default value; when the first current data is 1.25 - 1.35 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 80% - 90% of the default value; when the first current data is 1.35 - 1.45 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 60% - 80% of the default value.

[0010] In some embodiments, after sending the first control instruction to the controller at the anomaly occurrence location, the method further includes: detecting the elimination of the small overcurrent anomaly; generating a second control instruction and sending the second control instruction to the controller at the anomaly occurrence location, where the second control instruction is used to instruct the controller at the anomaly occurrence location to adjust the fusing current threshold of the intelligent fuse to restore to the default value.

[0011] In some embodiments, the detection of the elimination of the small overcurrent anomaly includes: receiving second current data and second temperature data from the abnormal occurrence location, where the second current data and the second temperature data are the temperature data and current data collected after the intelligent fuse parameters at the abnormal occurrence location are adjusted; detecting that the second current data is less than or equal to the rated current value; or, detecting that the second current data is greater than the rated current value and detecting that the temperature rising speed of the second temperature data is lower than the preset temperature rising speed; determining that the small overcurrent anomaly is eliminated.

[0012] In a second aspect, the present application provides a photovoltaic system, which includes a photovoltaic server, and further includes a solar photovoltaic module, a busbar box connected to the solar photovoltaic module, a DC cabinet connected to the busbar box, and a centralized inverter connected to the DC cabinet. The busbar box, the DC cabinet, and the centralized inverter all include a controller and an intelligent fuse; the photovoltaic server is communicatively connected to the busbar box, the DC cabinet, and the centralized inverter; the photovoltaic server is configured to execute the step instructions in the method according to any one of the first aspects.

[0013] In some embodiments, the intelligent fuse includes a control module, a current acquisition module, and a temperature acquisition module; the control module is configured to receive a fuse parameter adjustment instruction from the controller, adjust the fuse current threshold according to the fuse parameter adjustment instruction; and receive a fuse parameter restoration instruction from the controller, and is configured to restore the adjusted fuse current threshold to the default value; and detect that the current data exceeds the fuse current threshold and control the circuit to be cut off.

[0014] In a third aspect, the present application provides a processing device for small overcurrent based on an intelligent fuse, which is applied to a photovoltaic server of a photovoltaic system. The photovoltaic system includes a solar photovoltaic module, a busbar box connected to the solar photovoltaic module, a DC cabinet connected to the busbar box, and a centralized inverter connected to the DC cabinet. The busbar box, the DC cabinet, and the centralized inverter all include a controller and an intelligent fuse. The intelligent fuse is used to collect current data and its own temperature data; the photovoltaic server is communicatively connected to the busbar box, the DC cabinet, and the centralized inverter; the device includes: a receiving unit, configured to receive first current data and first temperature data from the busbar box, the DC cabinet, and the centralized inverter; and obtain a preset rated current value, a fusing parameter of the intelligent fuse, and a preset temperature rise rate; a processing unit, configured to determine whether there is a small overcurrent abnormality according to the first current data, the first temperature data, the rated current value, the fusing parameter, and the preset temperature rise rate; and detect that there is the small overcurrent abnormality; and determine the location where the abnormality occurs, and generate a first control instruction; a sending unit, configured to send the first control instruction to the controller at the location where the abnormality occurs, and the first control instruction is used to instruct the controller at the location where the abnormality occurs to adjust the fusing parameter.

[0015] In a fourth aspect, the present application provides a server, including a processor, a memory, a communication interface, and one or more programs. The one or more programs are stored in the memory and executed by the processor, and the programs include instructions for performing the steps in the method according to any one of the first aspects.

[0016] It can be seen that in the embodiments of the present application, the photovoltaic server monitors the first current data and the first temperature data of the busbar box, the DC cabinet, and the centralized inverter in real time through the intelligent fuse; and determines whether there is a small overcurrent abnormality according to the first current data, the rated current value, the fusing parameter, the first temperature data, and the preset temperature rise rate; after detecting that there is a small overcurrent abnormality, determines the location where the abnormality occurs, and instructs the controller at the location where the abnormality occurs to adjust the fusing current threshold of the intelligent fuse, avoiding the problem that the traditional fuse cannot operate due to insufficient heat accumulation, greatly improving the protection ability against small overcurrents, thereby reducing the equipment damage rate and failure incidence rate caused by small overcurrents in the photovoltaic system, improving the overall stability of the photovoltaic system, and further improving the power generation efficiency and economic benefits. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. Among them,

[0018] Figure 1 is a schematic diagram of the scenario of a photovoltaic system provided by an embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of an intelligent fuse provided by an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the connection relationship of each device in a photovoltaic system provided by an embodiment of the present application;

[0021] Figure 4 is a schematic structural diagram of a photovoltaic server provided by an embodiment of the present application;

[0022] Figure 5 is a schematic flow chart of a method for handling small overcurrents based on an intelligent fuse provided by an embodiment of the present application;

[0023] Figure 6 is a complete schematic flow chart of another method for handling small overcurrents based on an intelligent fuse provided by an embodiment of the present application;

[0024] Figure 7 is a functional unit structure block diagram of a device for handling small overcurrents based on an intelligent fuse provided by an embodiment of the present application. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] In the description and claims of this application and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but in some embodiments may also include steps or units not listed, or in some embodiments may also include other steps or units inherent to these processes, methods, products, or devices.

[0027] Reference to "embodiments" in this context means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] The "and / or" in the embodiments of this application describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone; A and B exist simultaneously; B exists alone. Among them, A and B can be singular or plural.

[0029] In the embodiments of this application, the symbol " / " can represent an "or" relationship between the associated objects before and after. Additionally, the symbol " / " can also represent a division sign, that is, perform a division operation. For example, A / B can represent A divided by B.

[0030] The "at least one (item)" or its similar expression in the embodiments of this application refers to any combination of these items, including any combination of a single item or multiple items, and refers to one or more, where multiple refers to two or more. For example, at least one (item) of a, b, or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b, and c. Among them, each of a, b, and c can be an element or a set containing one or more elements.

[0031] The "equal to" in the embodiments of this application can be used in conjunction with "greater than" and is applicable to the technical solutions adopted when it is greater than, or can also be used in conjunction with "less than" and is applicable to the technical solutions adopted when it is less than. When "equal to" is used in conjunction with "greater than", it is not used in conjunction with "less than"; when "equal to" is used in conjunction with "less than", it is not used in conjunction with "greater than".

[0032] Photovoltaic systems are exposed to the outdoor environment for a long time, and components, circuits, and other parts are vulnerable to natural factors and may generate small over-current anomalies. Specific scenarios include:

[0033] Problems at the component end: After long-term exposure to sunlight, wind, and rain, photovoltaic components may experience component aging and performance degradation of local solar cells; or local shadows may be formed due to dust accumulation or bird droppings, resulting in uneven internal current in the components and generating a small overcurrent (such as 1.1 - 1.45 times the rated current).

[0034] Problems at the line end: Line connection points (such as busbar box terminals, connectors between components) may become loose and oxidized after long-term use, increasing the contact resistance and causing a small overcurrent.

[0035] Traditional fuses rely on heat accumulation generated by current to achieve fusing. Facing the above small overcurrents, it takes a lot of time to complete heat accumulation before they can operate. In a photovoltaic system, such small overcurrents may persist without triggering the disconnection of traditional fuses, leading to potential hazards such as accelerated aging of line insulation and local overheating and burning of components, and even posing a fire risk.

[0036] To solve the above problems, this application provides a method and device for handling small overcurrents based on an intelligent fuse. By continuously monitoring the current data and temperature data in the photovoltaic system through the intelligent fuse, it can promptly respond to small overcurrent anomalies, avoiding the problem that traditional fuses cannot operate due to insufficient heat accumulation, greatly improving the protection ability against small overcurrents, and thus reducing the equipment damage rate and failure incidence rate caused by small overcurrents in the photovoltaic system.

[0037] The following uses specific embodiments to elaborate in detail on the technical solutions of this application and how the technical solutions of this application solve the above technical problems. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0038] Please refer to Figures 1 - 4 。 Figure 1 FIG. is a schematic diagram of a scenario of a photovoltaic system provided by an embodiment of this application. As Figure 1 shown, the photovoltaic system 1 includes a photovoltaic server 10, and also includes solar photovoltaic components 20, a busbar box 30 connected to the solar photovoltaic components 20, a DC cabinet 40 connected to the busbar box 30, and a centralized inverter 50 connected to the DC cabinet 40. The photovoltaic server 10 is communicatively connected to the busbar box 30, the DC cabinet 40, and the centralized inverter 50.

[0039] Among them, the busbar box 30 is connected to at least one solar photovoltaic component 20, the DC cabinet 40 is connected to at least one busbar box 30, and the centralized inverter 50 is connected to at least one DC cabinet 40.

[0040] The solar photovoltaic component 20 converts solar energy into direct current through the photovoltaic effect.

[0041] The busbar box 30 is used to collect the direct current generated by the solar photovoltaic modules 20. Since the current output by the solar photovoltaic modules 20 is relatively small, the busbar box 30 can aggregate the currents of multiple modules, facilitating subsequent transmission and processing. At the same time, it can also monitor and protect the input currents of each path, such as having functions like overcurrent and short-circuit protection.

[0042] The DC cabinet 40 is used to further distribute, control, and protect the direct current aggregated by the busbar box 30. It can perform busbar distribution on the DC power supply, distribute the electric energy to different branches, and simultaneously monitor parameters such as the voltage and current of the DC system, and has functions such as overvoltage, undervoltage, and grounding protection to ensure the stable operation of the DC system.

[0043] The centralized inverter 50 is used to convert the direct current output by the DC cabinet 40 into alternating current for connection to the power grid. Since the solar photovoltaic modules 20 generate direct current, while the power grid usually requires alternating current for transmission and use, the inverter is a key device for realizing this conversion. At the same time, the centralized inverter 50 can also optimize the power quality, such as controlling parameters such as the output voltage, frequency, and phase to meet the access requirements of the power grid.

[0044] In addition, in addition to the above devices, the photovoltaic system 1 further includes a step-up transformer 60 connected to the centralized inverter 50, a power grid distribution and power utilization system 70 connected to the step-up transformer 60, and a user terminal 80 connected to the power grid distribution and power utilization system 70.

[0045] The step-up transformer 60 is used to raise the voltage of the alternating current output by the centralized inverter 50 to a voltage level suitable for power grid transmission. The power grid distribution and power utilization system 70 is used to distribute and transmit the electric energy output by the step-up transformer 60, deliver the electric energy to each user terminal 80, including multiple parts such as substations, transmission lines, and distribution lines, and can perform voltage conversion, power distribution, and power control on the electric energy to ensure that the electric energy can be safely and stably supplied to different regions and users.

[0046] Among them, the busbar box 30, the DC cabinet 40, and the centralized inverter 50 all include a controller and an intelligent fuse.

[0047] In some embodiments, see Figure 2 , Figure 2 is a schematic structural diagram of the intelligent fuse provided by the embodiment of the present application. As Figure 2 shown, the intelligent fuse 2 includes a control module 21, a current acquisition module 22, and a temperature acquisition module 23.

[0048] Among them, the current acquisition module 22 is used to acquire the current data in the device where the intelligent fuse 2 is located, and the temperature acquisition module 23 is used to acquire the temperature data of the intelligent fuse 2 itself. The control module 21 can obtain the current data and temperature data.

[0049] Among them, the intelligent fuse 2 includes fusing parameters. The fusing parameters include the abnormal current-carrying cumulative time and the fusing current threshold. The intelligent fuse 2 also includes a rated current value, which is the current value at which the intelligent fuse 2 can work normally for a long time. The abnormal current-carrying cumulative time is the observation time when the current is abnormal as agreed. Specifically, if the duration of the current data exceeding the rated current value but not exceeding the fusing current threshold exceeds the abnormal current-carrying cumulative time, it indicates the risk of a small overcurrent anomaly. The photovoltaic server 10 will further determine whether there is a small overcurrent anomaly based on the temperature data of the intelligent fuse 2. When there is a small overcurrent anomaly, by lowering the fusing current threshold at the abnormal occurrence location, the intelligent fuse 2 can respond to a smaller overcurrent situation, avoiding the damage caused by the small overcurrent anomaly to the current for a long time. When the current data exceeds the fusing current threshold, the intelligent fuse 2 will directly fuse, thus playing a role in protecting the circuit.

[0050] Among them, for the above-mentioned small overcurrent situation, the intelligent fuse 2 presets a fusing parameter adaptation table, as shown in Table 1 below:

[0051] Table 1 is the fusing parameter adaptation table provided by the embodiment of the present application

[0052]

[0053] The fusing parameter adaptation table includes the abnormal current-carrying cumulative time, the fusing current threshold, and the corresponding reduction rate of the fusing current threshold corresponding to different current data. Exemplarily, as shown in Table 1, when the current data of 1.25I n has passed continuously for 30 minutes, if it is determined that there is a small overcurrent anomaly, the fusing current threshold will be reduced to 90% of the default value; when the current data of 1.3I n has passed continuously for 10 minutes, if it is determined that there is a small overcurrent anomaly, the fusing current threshold will be reduced to 80% of the default value; when the current data of 1.4I n has passed continuously for 1 minute, if it is determined that there is a small overcurrent anomaly, the fusing current threshold will be reduced to 60% of the default value.

[0054] Among them, the control module 21 is used to control the disconnection of the circuit after detecting that the current data exceeds the fusing current threshold, so as to realize the protection of the circuit and equipment.

[0055] Please refer to Figure 3 , Figure 3Schematic diagram of the connection relationships of various devices in a photovoltaic system provided by an embodiment of this application, as shown in Figure 3 As shown, the photovoltaic server 10 is communicatively connected to the controller 3 of the busbar box 30, the DC cabinet 40, and the centralized inverter 50 through a communication network such as a CAN bus or Ethernet, and the controller 3 is communicatively connected to the intelligent fuse.

[0056] Among them, the controller 3 is used to obtain the current data and temperature data collected by the intelligent fuse, preprocess them, and then package and send them to the photovoltaic server 10. The photovoltaic server 10 processes and analyzes the current data and temperature data sent by the busbar box 30, the DC cabinet 40, and the centralized inverter 50 according to the method embodiments described below to determine whether there is a small overcurrent anomaly. When it detects that there is a small overcurrent anomaly, it sends a fuse parameter adjustment instruction to the controller 3 of the device where the anomaly occurs. The controller 3 of the device where the anomaly occurs then sends a fuse parameter adjustment instruction to the intelligent fuse to adjust the fuse current threshold, for example, reducing the fuse current threshold to detect a small overcurrent situation.

[0057] After that, the photovoltaic server 10 determines whether the small overcurrent anomaly is eliminated based on the current data and temperature data after the fuse parameters are adjusted. In the case where the small overcurrent anomaly is eliminated, it sends a fuse parameter restoration instruction to the controller 3 of the device where the anomaly occurs to restore the fuse parameters of the intelligent fuse to the default value.

[0058] Based on the above content, the control module 21 is further configured to receive the fuse parameter adjustment instruction from the controller 3 and adjust the fuse current threshold according to the fuse parameter adjustment instruction; and, receive the fuse parameter restoration instruction from the controller 3 and restore the adjusted fuse current threshold to the default value.

[0059] Among them, for the photovoltaic server 10, the photovoltaic server 10 may specifically include a server responsible for data processing on the side of a network platform that can implement functions such as data transmission and data processing. It can be a physical server, or a server cluster or distributed system composed of multiple physical servers. In this embodiment, the number of servers is not specifically limited. Alternatively, it can also be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, Content Delivery Network (CDN), and big data and artificial intelligence platforms.

[0060] For specific implementation, please refer to Figure 4 , Figure 4 Schematic diagram of the structure of a photovoltaic server provided by an embodiment of this application, as shown in Figure 4As shown in the figure, the photovoltaic server 10 includes a processor 11, a memory 13, a communication interface 12, and one or more programs 131. Among them, the one or more programs 131 are stored in the memory 13 and are configured to be executed by the above-mentioned processor 11. The one or more programs 131 include instructions for executing any step in the following method embodiments for handling small overcurrents based on intelligent fuses.

[0061] In addition, the solar photovoltaic module 20 includes a light-facing surface adjustment driving device 201. The photovoltaic server 10 is also communicatively connected to the light-facing surface adjustment driving device 201 of the solar photovoltaic module 20 and the meteorological data server 90. The photovoltaic server 10 obtains meteorological data through the meteorological data server 90, analyzes the light-facing angle of the solar photovoltaic module 20 based on the meteorological data, and sends an adjustment instruction to the light-facing surface adjustment driving device 201 according to the light-facing angle, so as to maximize the photoelectric conversion efficiency of the solar photovoltaic module 20.

[0062] Of course, the photovoltaic system 1 may also include other more components, which are not limited here.

[0063] Based on the above system architecture, the method for handling small overcurrents based on intelligent fuses provided in the embodiments of the present application is proposed.

[0064] Please refer to Figure 5 , Figure 5 , which is a schematic flowchart of a method for handling small overcurrents based on intelligent fuses provided in the embodiments of the present application. The method is applied to a photovoltaic server as shown in Figure 1 . As shown in Figure 5 , the method includes the following steps S501 - step S505:

[0065] Step S501, receive first current data and first temperature data from the busbar box, the DC cabinet, and the centralized inverter; and obtain a preset rated current value, the fusing parameter of the intelligent fuse, and a preset temperature rise rate.

[0066] Among them, as shown in Figure 3 , the controllers of the busbar box, the DC cabinet, and the centralized inverter obtain current data and temperature data through the intelligent fuse, and preprocess the data such as filtering, amplifying, and removing interference signals, and then pack and send them to the photovoltaic server.

[0067] In some embodiments, the busbar box, the DC cabinet, and the centralized inverter have unique identifiers, and the current data and temperature data they send carry unique identifiers. The photovoltaic server can clarify which device's data is being processed currently by obtaining the identification information of the current data and temperature data.

[0068] In specific implementation, multiple first intelligent fuses in the busbar box sample the line current connecting multiple solar photovoltaic modules in real time at a sampling frequency of 100 kHz. Similarly, the temperature sensors built into the first intelligent fuses continuously collect their own temperatures. The first controller in the busbar box preliminarily processes the collected current and temperature data, and uploads the processed data to the photovoltaic server through the communication network.

[0069] The second intelligent fuses in the DC cabinet synchronously sample the current in the DC cabinet at 100 kHz, and the temperature sensors built into the second intelligent fuses collect their own temperatures. The second controller in the DC cabinet preliminarily processes the collected current and temperature data, and uploads the processed data to the photovoltaic server through the communication network.

[0070] The third intelligent fuses in the centralized inverter synchronously sample the current in the centralized inverter at 100 kHz, and the temperature sensors built into the third intelligent fuses collect their own temperatures. The third controller in the centralized inverter preliminarily processes the collected current and temperature data, and uploads the processed data to the photovoltaic server through the communication network.

[0071] Step S502, determine whether there is a small overcurrent anomaly according to the first current data, the first temperature data, the rated current value, the fusing parameter, and the preset temperature rise rate.

[0072] Among them, after receiving the current data and temperature data from the busbar box, the DC cabinet, and the centralized inverter, the photovoltaic server analyzes the current data uploaded by the busbar box, the DC cabinet, and the centralized inverter, compares it with the preset rated current value, and based on the comparison of the current data, analyzes the temperature rise trend through the temperature data, and further clarifies whether there is a small overcurrent anomaly according to the comparison between the temperature rise trend and the preset temperature rise rate.

[0073] Step S503, it is detected that there is the small overcurrent anomaly.

[0074] In some embodiments, the fusing parameter includes a fusing current threshold and an abnormal current-carrying cumulative time, and the detection of the existence of the small overcurrent anomaly includes: detecting that the duration for which the first current data exceeds the rated current value and does not exceed the fusing current threshold exceeds the abnormal current-carrying cumulative time; calculating the temperature rise rate according to the first temperature data; detecting that the temperature rise rate exceeds the preset temperature rise rate; and confirming the existence of the small overcurrent anomaly.

[0075] Among them, the fusing parameters include a fusing current threshold and an abnormal current-carrying cumulative time. The abnormal current-carrying cumulative time is the observation time when the current is abnormal as agreed. Specifically, if the duration during which the current data exceeds the rated current value but does not exceed the fusing current threshold exceeds the abnormal current-carrying cumulative time, it indicates a risk of small overcurrent abnormality. The photovoltaic server will further determine whether there is a small overcurrent abnormality based on the temperature data of the intelligent fuse. When there is a small overcurrent abnormality, by lowering the fusing current threshold at the abnormal occurrence location, the intelligent fuse can respond to a smaller overcurrent situation, avoiding the damage caused by the small overcurrent abnormality to the current for a long time. When the current data exceeds the fusing current threshold, the intelligent fuse will directly blow, thus playing a role in protecting the circuit.

[0076] In a possible example, the judgment criterion for small overcurrent can be set to 1.1 - 1.45 times the rated current value.

[0077] When the first current data exceeds 1.1 - 1.45 times the rated current, analyze the temperature rising trend, obtain the temperature rising speed. If it is detected that the temperature rising speed exceeds the preset temperature rising speed, further confirm that there is a small overcurrent situation.

[0078] It can be seen that in this embodiment, through the real-time data interaction and intelligent control between the intelligent fuse and the photovoltaic server, the intelligent management of the photovoltaic system is realized. The photovoltaic server makes a preliminary judgment on the circuit condition through the current data and conducts a final confirmation and detection through the temperature data, and can respond to the small overcurrent situation in a timely manner. At the same time, the operation and maintenance personnel can understand the operation status of the system in real time through the photovoltaic server, discover and handle potential problems in a timely manner, improve the operation and maintenance efficiency, and reduce the operation and maintenance cost.

[0079] Step S504, determine the abnormal occurrence location and generate a first control instruction.

[0080] In some embodiments, the first current data and the first temperature data carry identification information. The determining the abnormal occurrence location includes: obtaining the identification information of the first current data and the first temperature data detected to have a small overcurrent abnormality; determining that the abnormal occurrence location is at least one of the busbar trunking, the DC cabinet, or the centralized inverter according to the identification information.

[0081] Specifically, the photovoltaic server analyzes and compares the first current data and the first temperature data in terms of current and temperature. If it is detected that the currently processed first current data and first temperature data are determined to have a small overcurrent abnormality, obtain the identification information of the currently processed first current data and first temperature data. This identification information is the identification information of any one of the busbar trunking, the DC cabinet, or the centralized inverter, so as to determine the abnormal occurrence location.

[0082] It can be seen that in this embodiment, the photovoltaic server accurately locates the position where the abnormality occurs, sends a control instruction to the controller at the position where the abnormality occurs, and accurately adjusts the parameters of the intelligent fuse, avoiding the influence on other normal components and ensuring the stability and safety of the system operation.

[0083] Step S505: Send the first control instruction to the controller at the position where the abnormality occurs.

[0084] Wherein, the first control instruction is used to instruct the controller at the position where the abnormality occurs to adjust the fusing current threshold of the intelligent fuse.

[0085] In some embodiments, the first control instruction is used to instruct the controller to reduce the fusing current threshold according to a preset fusing parameter adaptation table, and the fusing parameter adaptation table includes the abnormal current-carrying cumulative time corresponding to different current data, the default value of the fusing current threshold, and the adjusted value.

[0086] Specifically, in some embodiments, the default value of the fusing current threshold is 1.1 - 1.45 times the rated current value; when the first current data is 1.1 - 1.25 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 90% - 100% of the default value; when the first current data is 1.25 - 1.35 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 80% - 90% of the default value; when the first current data is 1.35 - 1.45 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 60% - 80% of the default value.

[0087] Exemplarily, in combination with Table 1, it is detected that there is a small overcurrent abnormality. Assuming the fusing current threshold is 1.45I n , and the first current data is 1.25I n , then the fusing current threshold is reduced to 90% of the default value; when the first current data is 1.3I n , then the fusing current threshold is reduced to 80% of the default value; when the first current data is 4I n , then the fusing current threshold is reduced to 60% of the default value; when the first current data is 1.5I n , then the fuse is directly blown.

[0088] It should be noted that this embodiment is only an example provided in this application. The specific adjustment range can be designed by the user according to the actual usage scenario, and no limitation is imposed thereon.

[0089] It can be seen that in the embodiments of the present application, the photovoltaic server monitors the first current data and the first temperature data of the busbar box, the DC cabinet, and the centralized inverter in real time through the intelligent fuse; and determines whether there is a small overcurrent anomaly according to the first current data, the rated current value, the fusing parameter, the first temperature data, and the preset temperature rise rate; after detecting the existence of a small overcurrent anomaly, the position where the anomaly occurs is determined, and the controller at the position where the anomaly occurs is instructed to adjust the fusing current threshold of the intelligent fuse, avoiding the problem that the traditional fuse cannot operate due to insufficient heat accumulation, greatly improving the protection ability against small overcurrents, thereby reducing the equipment damage rate and failure rate caused by small overcurrents in the photovoltaic system, improving the overall stability of the photovoltaic system, and further improving the power generation efficiency and economic benefits.

[0090] In some embodiments, after sending the first control instruction to the controller at the position where the anomaly occurs, the method further includes: detecting that the small overcurrent anomaly is eliminated; generating a second control instruction, and sending the second control instruction to the controller at the position where the anomaly occurs, where the second control instruction is used to instruct the controller at the position where the anomaly occurs to adjust the fusing current threshold of the intelligent fuse back to the default value.

[0091] Among them, after adjusting the parameters of the intelligent fuse, the intelligent fuses of the busbar box, the DC cabinet, and the centralized inverter continue to collect current data and temperature data in real time and upload them to the photovoltaic server. The photovoltaic server continuously analyzes the data to determine whether the small overcurrent situation has been eliminated.

[0092] When it is monitored that the current data returns to the rated current range, and the temperature is within the normal range and lasts for a period of time, the photovoltaic server determines that the small overcurrent anomaly is eliminated and sends a second control instruction, that is, a fusing parameter restoration instruction, to the corresponding controller.

[0093] After receiving the instruction, the controller at the position where the anomaly occurs restores the fusing current threshold of the intelligent fuse to the default value.

[0094] Specifically, in some embodiments, the detecting that the small overcurrent anomaly is eliminated includes: receiving the second current data and the second temperature data from the position where the anomaly occurs, where the second current data and the second temperature data are the temperature data and current data collected after the parameters of the intelligent fuse at the position where the anomaly occurs are adjusted; detecting that the second current data is less than or equal to the rated current value; or, detecting that the second current data is greater than the rated current value, and detecting that the temperature rise rate of the second temperature data is lower than the preset temperature rise rate; determining that the small overcurrent anomaly is eliminated.

[0095] It can be seen that in this embodiment, by continuously analyzing data, the photovoltaic server can automatically determine whether the small overcurrent situation has been eliminated, realizing the automatic diagnosis function for abnormal situations, improving the efficiency and accuracy of dealing with abnormal situations, and reducing the workload and error of manual troubleshooting and judgment. After determining that the abnormal situation of small overcurrent has been eliminated, the photovoltaic server can automatically send an instruction to the corresponding controller to restore the fusing current threshold of the intelligent fuse to the default value, realizing the automatic recovery of the system without manual intervention, improving the stability and reliability of the system, reducing the system downtime, and improving the overall efficiency of the photovoltaic power generation system.

[0096] Consistent with the above method embodiment, please refer to Figure 6 , Figure 6 which is a complete flow schematic diagram of another method for dealing with small overcurrent based on an intelligent fuse provided by the embodiment of the present application. As Figure 6 shown, the method includes the following steps S601 - step S608:

[0097] Step S601, receive the first current data and the first temperature data from the busbar box, DC cabinet, and centralized inverter; and obtain the preset rated current value, the fusing parameters of the intelligent fuse, and the preset temperature rise rate.

[0098] Step S602, determine whether there is a small overcurrent abnormality according to the first current data, the first temperature data, the rated current value, the fusing parameters, and the preset temperature rise rate.

[0099] Step S603, detect that the duration when the first current data exceeds the rated current value and does not exceed the fusing current threshold exceeds the abnormal current - passing cumulative time; calculate the temperature rise rate according to the first temperature data; detect that the temperature rise rate exceeds the preset temperature rise rate; confirm that there is a small overcurrent abnormality.

[0100] Step S604, determine the abnormal occurrence location and generate a first control instruction.

[0101] Step S605, send the first control instruction to the controller at the abnormal occurrence location.

[0102] Among them, the first control instruction is used to instruct the controller at the abnormal occurrence location to adjust the fusing parameters of the intelligent fuse.

[0103] Step S606, receive the second current data and the second temperature data from the abnormal occurrence location.

[0104] Among them, the second current data and the second temperature data are the temperature data and current data collected after the fusing parameters of the intelligent fuse at the abnormal occurrence location are adjusted.

[0105] Step S607, it is detected that the second current data is less than or equal to the rated current value; or, it is detected that the second current data is greater than the rated current value, and the temperature rising speed of the second temperature data is lower than the preset rising speed; it is determined that the minor overcurrent anomaly is eliminated.

[0106] Step S608, generate a second control instruction and send the second control instruction to the controller at the anomaly occurrence location.

[0107] Wherein, the second control instruction is used to instruct the controller at the anomaly occurrence location to adjust the fuse current threshold of the intelligent fuse to the default value.

[0108] It can be seen that in the embodiment of the present application, the photovoltaic server monitors the first current data and the first temperature data of the busbar box, DC cabinet, and centralized inverter in real time through the intelligent fuse; and determines whether there is a minor overcurrent anomaly according to the first current data, rated current value, fusing parameter, first temperature data, and preset rising speed; after detecting the existence of a minor overcurrent anomaly, determine the anomaly occurrence location, and instruct the controller at the anomaly occurrence location to adjust the fuse current threshold of the intelligent fuse, avoiding the problem that the traditional fuse cannot operate due to insufficient heat accumulation, greatly improving the protection ability against minor overcurrents, thereby reducing the equipment damage rate and failure incidence rate caused by minor overcurrents in the photovoltaic system, improving the overall stability of the photovoltaic system, and further improving the power generation efficiency and economic benefits.

[0109] The above mainly introduces the solution of the embodiment of the present application from the perspective of the execution process on the method side. It can be understood that in order for the server to implement the above functions, it includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combined with the units and algorithm steps of each example described in the embodiments provided in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraint conditions of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0110] The embodiment of the present application can divide the server into functional units according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiment of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0111] In the case of using an integrated unit, please refer to Figure 7 , Figure 7 which is a functional unit structure block diagram of a small overcurrent processing device based on an intelligent fuse provided by an embodiment of the present application. As Figure 7 shown, the small overcurrent processing device 7 based on the intelligent fuse includes:

[0112] A receiving unit 701, configured to receive first current data and first temperature data from the busbar box, the DC cabinet, and the centralized inverter; and obtain a preset rated current value, a fusing parameter of the intelligent fuse, and a preset temperature rise rate;

[0113] A processing unit 702, configured to determine whether there is a small overcurrent anomaly according to the first current data, the first temperature data, the rated current value, the fusing parameter, and the preset temperature rise rate; and detect the existence of the small overcurrent anomaly; and determine the location where the anomaly occurs, and generate a first control instruction;

[0114] A sending unit 703, configured to send the first control instruction to the controller at the location where the anomaly occurs, and the first control instruction is used to instruct the controller at the location where the anomaly occurs to adjust the fusing parameter.

[0115] It can be seen that in the embodiment of the present application, the photovoltaic server monitors the first current data and the first temperature data of the busbar box, the DC cabinet, and the centralized inverter in real time through the intelligent fuse; and determines whether there is a small overcurrent anomaly according to the first current data, the rated current value, the fusing parameter, the first temperature data, and the preset temperature rise rate; after detecting the existence of the small overcurrent anomaly, determines the location where the anomaly occurs, and instructs the controller at the location where the anomaly occurs to adjust the fusing current threshold of the intelligent fuse, avoiding the problem that the traditional fuse cannot operate due to insufficient heat accumulation, greatly improving the protection ability against small overcurrents, thereby reducing the equipment damage rate and failure incidence rate caused by small overcurrents in the photovoltaic system, improving the overall stability of the photovoltaic system, and further improving the power generation efficiency and economic benefits.

[0116] In some embodiments, the fusing parameter includes a fusing current threshold and an abnormal current-carrying cumulative time. The processing unit 702 detecting the existence of the small overcurrent anomaly includes: detecting that the duration for which the first current data exceeds the rated current value and does not exceed the fusing current threshold exceeds the abnormal current-carrying cumulative time; calculating the temperature rise rate according to the first temperature data; detecting that the temperature rise rate exceeds the preset temperature rise rate; and confirming the existence of the small overcurrent anomaly.

[0117] In some embodiments, the first current data and the first temperature data carry identification information. The processing unit 702 determines the abnormal occurrence location, including: obtaining the identification information of the first current data and the first temperature data detected to have a small overcurrent abnormality; determining that the abnormal occurrence location is at least one of the busbar box, the DC cabinet, or the centralized inverter according to the identification information.

[0118] In some embodiments, the first control instruction is used to instruct the controller to reduce the fuse current threshold according to a preset fuse parameter adaptation table, and the fuse parameter adaptation table includes the abnormal through-current cumulative time corresponding to different current data, the default value of the fuse current threshold, and the adjusted value.

[0119] In some embodiments, the default value of the fuse current threshold is 1.1 - 1.45 times the rated current value; when the first current data is 1.1 - 1.25 times the rated current value, the first control instruction is used to instruct the fuse current threshold to be reduced to 90% - 100% of the default value; when the first current data is 1.25 - 1.35 times the rated current value, the first control instruction is used to instruct the fuse current threshold to be reduced to 80% - 90% of the default value; when the first current data is 1.35 - 1.45 times the rated current value, the first control instruction is used to instruct the fuse current threshold to be reduced to 60% - 80% of the default value.

[0120] In some embodiments, after the sending unit 703 sends the first control instruction to the controller at the abnormal occurrence location, the processing unit 702 is further configured to: detect that the small overcurrent abnormality is eliminated; generate a second control instruction and send the second control instruction to the controller at the abnormal occurrence location, and the second control instruction is used to instruct the controller at the abnormal occurrence location to adjust the fuse current threshold of the intelligent fuse to the default value.

[0121] In some embodiments, the processing unit 702 detects that the small overcurrent abnormality is eliminated, including: receiving second current data and second temperature data from the abnormal occurrence location, where the second current data and the second temperature data are the temperature data and current data collected after the parameters of the intelligent fuse at the abnormal occurrence location are adjusted; detecting that the second current data is less than or equal to the rated current value; or detecting that the second current data is greater than the rated current value and detecting that the temperature rising speed of the second temperature data is lower than the preset temperature rising speed; determining that the small overcurrent abnormality is eliminated.

[0122] An embodiment of the present application provides a computer-readable storage medium, on which a computer program / instructions are stored, and when the computer program / instructions are executed by a processor, the steps of the method according to any possible embodiment are implemented.

[0123] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0124] In the above embodiments, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0125] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be in an electrical or other form.

[0126] The units described as separate components above may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0127] In addition, the functional units in the various embodiments of the present application can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0128] If the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on such an understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above methods in various embodiments of this application. The aforementioned memory includes: USB flash drives, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), mobile hard disks, magnetic disks, or optical discs, etc., which are various media that can store program codes.

[0129] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program. This program can be stored in a computer-readable memory. The memory can include: flash drives, read-only memories (English: Read-Only Memory, abbreviated as: ROM), random access memories (English: Random Access Memory, abbreviated as: RAM), magnetic disks, or optical discs, etc.

[0130] The above has introduced the embodiments of this application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A processing method for small overcurrent based on an intelligent fuse, characterized in that, A photovoltaic server applied to a photovoltaic system, the photovoltaic system comprising a solar photovoltaic module, a busbar box connected to the solar photovoltaic module, a DC cabinet connected to the busbar box, and a centralized inverter connected to the DC cabinet, wherein the busbar box, the DC cabinet, and the centralized inverter all include a controller and an intelligent fuse, and the intelligent fuse is used for collecting current data and its own temperature data; The photovoltaic server is communicatively connected to the busbar box, the DC cabinet, and the centralized inverter; the method includes: Receiving first current data and first temperature data from the busbar box, the DC cabinet, and the centralized inverter; and obtaining a preset rated current value, a fusing parameter of the intelligent fuse, and a preset temperature rise rate, where the fusing parameter includes a fusing current threshold and an abnormal current-carrying cumulative time; Determining whether there is a slight overcurrent abnormality according to the first current data, the first temperature data, the rated current value, the fusing parameter, and the preset temperature rise rate; Detecting that the duration for which the first current data exceeds the rated current value and does not exceed the fusing current threshold exceeds the abnormal current-carrying cumulative time; Calculating the temperature rise rate according to the first temperature data; Detecting that the temperature rise rate exceeds the preset temperature rise rate, and confirming the existence of the slight overcurrent abnormality; Determining the abnormal occurrence location and generating a first control instruction; Sending the first control instruction to the controller at the abnormal occurrence location, where the first control instruction is used to instruct the controller at the abnormal occurrence location to adjust the fusing parameter; 2. The method for processing small overcurrents based on an intelligent fuse according to claim 1, wherein The first current data and the first temperature data carry identification information, and determining the abnormal occurrence location includes: Obtaining the identification information of the first current data and the first temperature data detected to have a slight overcurrent abnormality; Determining that the abnormal occurrence location is at least one of the busbar box, the DC cabinet, or the centralized inverter according to the identification information; 3. The method for processing small overcurrents based on an intelligent fuse according to claim 1, wherein The first control instruction is used to instruct the controller to reduce the fusing current threshold according to a preset fusing parameter adaptation table, and the fusing parameter adaptation table includes the abnormal current-carrying cumulative time corresponding to different current data, the default value of the fusing current threshold, and the adjusted value; 4. The processing method for small overcurrent based on an intelligent fuse according to claim 3, characterized in that, The default value of the fusing current threshold is 1.1 - 1.45 times the rated current value; When the first current data is 1.1 - 1.25 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 90% - 100% of the default value; When the first current data is 1.25 - 1.35 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 80% - 90% of the default value; When the first current data is 1.35 - 1.45 times the rated current value, the first control instruction is used to instruct the fusing current threshold to be reduced to 60% - 80% of the default value; 5. The method for processing small overcurrents based on an intelligent fuse according to claim 1, wherein, After sending the first control instruction to the controller at the abnormal occurrence location, the method further includes: Detecting that the slight overcurrent abnormality is eliminated; Generate a second control instruction and send the second control instruction to the controller at the abnormal occurrence location, where the second control instruction is used to instruct the controller at the abnormal occurrence location to adjust the fuse current threshold of the intelligent fuse back to the default value.

6. The method for processing small overcurrents based on an intelligent fuse according to claim 5, characterized in that, The detection that the small overcurrent abnormality is eliminated includes: Receiving second current data and second temperature data from the abnormal occurrence location, where the second current data and the second temperature data are the temperature data and current data collected after the parameters of the intelligent fuse at the abnormal occurrence location are adjusted; Detecting that the second current data is less than or equal to the rated current value; or, Detecting that the second current data is greater than the rated current value and detecting that the temperature rising speed of the second temperature data is lower than the preset temperature rising speed; Determining that the small overcurrent abnormality is eliminated.

7. A photovoltaic system, characterized in that, The photovoltaic system includes a photovoltaic server, and includes solar photovoltaic modules, a busbar box connected to the solar photovoltaic modules, a DC cabinet connected to the busbar box, and a centralized inverter connected to the DC cabinet. The busbar box, the DC cabinet, and the centralized inverter all include a controller and an intelligent fuse; the photovoltaic server is communicatively connected to the busbar box, the DC cabinet, and the centralized inverter; the photovoltaic server is configured to execute the step instructions in the small overcurrent processing method based on an intelligent fuse according to any one of claims 1-6.

8. The photovoltaic system according to claim 7, wherein The intelligent fuse includes a control module, a current acquisition module, and a temperature acquisition module; The control module is configured to receive a fuse parameter adjustment instruction from the controller and adjust the fuse current threshold according to the fuse parameter adjustment instruction; and, Receive a fuse parameter restoration instruction from the controller for restoring the adjusted fuse current threshold to the default value; And, Detect that the current data exceeds the fuse current threshold and control to cut off the circuit.

9. A processing device for small overcurrents based on an intelligent fuse, characterized in that, A photovoltaic server applied to a photovoltaic system, the photovoltaic system includes solar photovoltaic modules, a busbar box connected to the solar photovoltaic modules, a DC cabinet connected to the busbar box, and a centralized inverter connected to the DC cabinet. The busbar box, the DC cabinet, and the centralized inverter all include a controller and an intelligent fuse, and the intelligent fuse is configured to collect current data and its own temperature data; The photovoltaic server is communicatively connected to the busbar box, the DC cabinet, and the centralized inverter; the device includes: A receiving unit, configured to receive first current data and first temperature data from the busbar box, the DC cabinet, and the centralized inverter; and obtain a preset rated current value, fuse parameters of the intelligent fuse, and a preset temperature rising speed, where the fuse parameters include a fuse current threshold and an abnormal current-carrying cumulative time; A processing unit, configured to determine whether there is a slight overcurrent anomaly according to the first current data, the first temperature data, the rated current value, the fusing parameter, and the preset temperature rise rate; and, when it is detected that the duration for which the first current data exceeds the rated current value and does not exceed the fusing current threshold exceeds the abnormal current-carrying cumulative time; calculate the temperature rise rate according to the first temperature data; when it is detected that the temperature rise rate exceeds the preset temperature rise rate, confirm the existence of the slight overcurrent anomaly; and, determine the abnormal occurrence location and generate a first control instruction; A sending unit, configured to send the first control instruction to the controller at the abnormal occurrence location, where the first control instruction is used to instruct the controller at the abnormal occurrence location to adjust the fusing parameter.

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