Automatic layout method, power generation system and monitoring system

Abstract

This application provides an automatic layout method, a power generation system, and a monitoring system. The power generation system includes at least two inverters, a DC power generation device, and a combiner bus. The DC terminal of each inverter is connected to the corresponding DC power generation device, and the AC terminal of each inverter is connected to the corresponding combiner bus. The second terminal of each combiner bus is connected to the first terminal of the next adjacent combiner bus to form a combiner path. The first terminal of the combiner bus at one end of the combiner path is open-circuited, and the second terminals of the combiner buses at the other two ends of the combiner path are connected to the power grid. The method includes: after all inverters are started, acquiring a data packet sent by each inverter, the data packet including the current of the second terminal of the inverter and the inverter's own serial number; determining the number of each inverter based on the magnitude of all currents, wherein the numerical value of the number is used to indicate the position of the corresponding inverter in a preset topology of the power generation system; and associating the number of the same inverter with the corresponding serial number.

Description

Technical Field

[0001] This application relates to the field of equipment installation and management technology, and in particular to an automatic layout method, a power generation system, and a monitoring system. Background Technology

[0002] With the popularization of new energy technologies, inverters are being used more and more widely in the new energy field. Taking the distributed photovoltaic industry as an example, the number of inverters included in various distributed photovoltaic power generation systems is constantly increasing. To facilitate subsequent maintenance and upgrades, it is usually necessary to identify the location of each inverter in the photovoltaic power generation system. In related technologies, the serial number of the inverter at each location is usually recorded during manual installation, and then the serial number of the inverter corresponding to each monitoring location is manually entered into the monitoring platform to adjust the serial number to the corresponding monitoring location according to the actual installation. Obviously, such a manual layout method requires a lot of manpower and time. Summary of the Invention

[0003] In view of this, this application provides an automatic layout method, a power generation system and a monitoring system, which can realize the automatic layout of multiple inverters, simplify the installation process and reduce labor and time costs.

[0004] This application provides a first aspect: an automatic layout method applied to a power generation system. The power generation system includes at least two inverters, at least two DC power generation devices, and at least two busbars. Each busbar includes a first terminal and a second terminal. The DC terminal of each inverter is connected to the corresponding DC power generation device, the AC terminal of each inverter is connected to the corresponding busbar, and the second terminal of each busbar is connected to the first terminal of the next adjacent busbar to form a busbar path. The first terminal of the busbar at the first end of the busbar path is open-circuited, and the second terminal of the busbar at the second end of the busbar path is connected to the power grid. The busbar path is used to collect the AC power output from all AC terminals to the power grid. The method includes: after all inverters are started, acquiring a data packet sent by each inverter, the data packet including the current of the second terminal corresponding to the inverter and the inverter's own serial number; determining the number of each inverter based on the magnitude of all currents, wherein the numerical value of the number indicates the position of the corresponding inverter in a preset topology of the power generation system; and associating the number of the same inverter with its corresponding serial number.

[0005] A second aspect of this application provides an automatic layout method applied to a power generation system, the power generation system including at least two inverters, at least two DC power generation devices, and at least two busbars. Each busbar includes a first terminal and a second terminal. The DC terminal of each inverter is used to connect to the corresponding DC power generation device, the AC terminal of each inverter is connected to the corresponding busbar, and the second terminal of each busbar is used to connect to the first terminal of the next adjacent busbar to form a busbar path. The first terminal of the busbar at the first end of the busbar path is open-circuited, and the second terminal of the busbar at the second end of the busbar path is used to connect to the power grid. The busbar path is used to collect the AC power output from all AC terminals to the power grid. The method includes: after all inverters are started, each inverter sends a data packet to a processor, the data packet including the current of the second terminal corresponding to the inverter and the inverter's own serial number; the processor receives the data packet sent by each inverter, and the processor determines the number of each inverter based on the magnitude of all currents, wherein the numerical value of the number indicates the position of the corresponding inverter in a preset topology of the power generation system; the processor associates the number of the same inverter with its corresponding serial number.

[0006] A third aspect of this application provides a power generation system comprising at least two inverters, at least two DC power generation devices, and at least two busbars. Each busbar includes a first terminal and a second terminal. The DC terminal of each inverter is connected to the corresponding DC power generation device, and the AC terminal of each inverter is connected to the corresponding busbar. The second terminal of each busbar is connected to the first terminal of the next adjacent busbar to form a busbar path. The first terminal of the busbar at the first end of the busbar path is open-circuited, and the second terminal of the busbar at the second end of the busbar path is connected to the power grid. The busbar path is used to collect the AC power output from all AC terminals into the power grid.

[0007] A fourth aspect of this application provides a monitoring system, comprising at least a processor. The monitoring system communicates with the power generation system described above. The processor is configured to: after all inverters are started, acquire a data packet sent by each inverter, the data packet including the current at the second terminal corresponding to the inverter and the inverter's own serial number; determine the number of each inverter based on the magnitude of all currents, wherein the numerical value of the number indicates the position of the corresponding inverter in a preset topology of the power generation system; and associate the number of the same inverter with its corresponding serial number.

[0008] The automatic layout method provided in this application first connects the DC terminal of each inverter in the power generation system to a DC power generation device and the AC terminal of each inverter to a corresponding busbar. The second terminal of each busbar is connected to the first terminal of the next adjacent busbar to form a busbar path, which collects the AC power output from all AC terminals into the power grid. Then, this automatic layout method acquires data packets sent by each inverter after all inverters are started. These data packets include the current at the second terminal b corresponding to the inverter and the inverter's own serial number. Since the magnitude of the current at the second terminal of each inverter is related to the inverter's position on the busbar path, the number of each inverter can be determined based on the magnitude of all currents. Different numbers represent inverters at different locations, and the number of the same inverter is associated with its corresponding serial number. Thus, the position of an inverter on the busbar path can be determined based on the number or serial number of any inverter, eliminating the need for manual operation and enabling automatic layout of multiple inverters in the power generation system, effectively reducing the time and labor costs associated with power generation system layout. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be considered as a limitation on the scope of protection of this application. In the various drawings, similar components are numbered similarly.

[0010] Figure 1 This is a schematic diagram illustrating the application environment of the automatic layout method provided in an embodiment of this application.

[0011] Figure 2 This is a schematic diagram of a preset topology of a power generation system provided in an embodiment of this application.

[0012] Figure 3 This is a structural block diagram of an inverter in one embodiment of this application.

[0013] Figure 4 This is a schematic diagram illustrating the application environment of an automatic layout method provided in another embodiment of this application.

[0014] Figure 5 This is a flowchart illustrating an automatic layout method provided in an embodiment of this application.

[0015] Figure 6 This is a flowchart illustrating the sub-steps of step S502 provided in an embodiment of this application.

[0016] Figure 7 This is a flowchart illustrating the sub-steps of step S602 provided in an embodiment of this application.

[0017] Figure 8 This is a flowchart illustrating the sub-steps of step S702 provided in an embodiment of this application.

[0018] Figure 9 This is a structural block diagram of an electronic device provided in an embodiment of this application.

[0019] Figure 10 A functional block diagram of a computer storage medium provided in an embodiment of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0021] It is understood that the connection relationships described in this application refer to direct or indirect connections. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. For example, A can be directly connected to C, and C can be directly connected to B, thus achieving a connection between A and B through C. It is also understood that the "A connects to B" described in this application can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0022] In the description of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0023] In the description of this application, the words "first," "second," etc., are used only to distinguish different objects and do not limit the quantity or order of execution, nor do they imply that they must be different. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] Some embodiments will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] With the popularization of new energy technologies, inverters are being used more and more widely in the new energy field. Taking the distributed photovoltaic industry as an example, the number of inverters included in various distributed photovoltaic power generation systems is constantly increasing. To facilitate subsequent maintenance and upgrades, it is usually necessary to identify the location of each inverter in the photovoltaic power generation system. In related technologies, the serial number of the inverter at each location is usually recorded during manual installation, and then the serial number of the inverter corresponding to each monitoring location is manually entered into the monitoring platform to adjust the serial number to the corresponding monitoring location according to the actual installation. Obviously, such a manual layout method requires a lot of manpower and time.

[0027] In view of this, this application provides an automatic layout method, a power generation system and a monitoring system, which can realize the automatic layout of multiple inverters, simplify the installation process and reduce labor and time costs.

[0028] Please see Figure 1 , Figure 1 This is a schematic diagram illustrating an application scenario of the automatic layout method in one embodiment of this application. Figure 1 The application scenarios shown include power generation system 10 and monitoring system 20.

[0029] The power generation system 10 includes at least two DC power generation devices 110, at least two inverters 121, and at least two busbars 122. Each busbar 122 includes a first terminal a and a second terminal b. The DC terminal (DC) of each inverter 121 is connected to the corresponding DC power generation device 110. The AC terminal (AC) of each inverter 121 is connected to the corresponding busbar 122. For example, the busbar 122 also includes a third terminal c. The AC terminal (AC) of each inverter 121 is connected to the third terminal (c) of the corresponding busbar 122. The second terminal (b) of each busbar 122 is connected to the first terminal (a) of the next adjacent busbar 122 to form a busbar path 123. The first terminal (a) of the busbar 122 at the first end of the busbar path 123 is open-circuited, and the second terminal (b) of the busbar 122 at the second end of the busbar path 123 is connected to the power grid 30. The busbar path 123 is used to collect the AC power output from all AC terminals to the power grid 30. In other words, the current flowing through the second terminal b is the sum of the current flowing through the first terminal a and the current flowing through the third terminal c.

[0030] In some embodiments, inverter 121 includes a DC-AC conversion circuit ( Figure 1 (Not shown, hereinafter referred to as DC-AC conversion circuit). The DC terminal (DC) can be the DC terminal of the DC-AC conversion circuit, and the AC terminal (AC) can be the AC terminal of the DC-AC conversion circuit. The DC-AC conversion circuit can be used to convert the DC power from the corresponding DC power generation device 110 into AC power and collect it into the power grid 30 through the corresponding busbar 122.

[0031] Please continue reading. Figure 2 , Figure 2 This is a schematic diagram of a preset topology for a power generation system 10 according to an embodiment of this application. In this preset topology, the power generation system 10 includes a DC power generation device 110a, a DC power generation device 110b, an inverter 121a, an inverter 121b, a bus 122a, and a bus 122b. Assume that the effective value of the AC current output by inverters 121a and 121b after inverting the corresponding DC power generation devices 110a and 110b is 15A. Then, the effective value of the AC current detected at the second terminal b of bus 122a is 15A, and the effective value of the AC current detected at the second terminal b of bus 122b is 30A. Similarly, when the power generation system 10 includes more DC power generation devices 110, inverters 121 and busbars 122, and each inverter 121 is working normally, the longer the transmission line between the busbar 122 and the power grid 30 is, the greater the effective value of the AC current detected at the second terminal b of the busbar 122.

[0032] Understandably, in Figure 1 In the illustrated power generation system 10, the combiner bus 122 is provided independently of the inverter 121. In other embodiments, the combiner bus 122 may also be provided within the corresponding inverter 121. That is, the combiner bus 122 may also be integrated into the inverter 121. For example, please refer to [further details omitted]. Figure 3 The inverter 121 includes a DC-AC conversion circuit 1211 and a bus 122. The inverter 121 has a DC terminal (DC), a first terminal a, and a second terminal b. The DC terminal of the DC-AC conversion circuit 1211 is connected to the DC terminal of the inverter 121, and the AC terminal of the DC-AC conversion circuit 1211 is connected to the bus 122. One end of the bus 122 is connected to the first terminal a, and the second end of the bus 122 is connected to the second terminal b. The AC terminal of the DC-AC conversion circuit 1211 is also connected to the bus 122. Thus, the DC terminal (DC) of the inverter 121 can be used to connect to a corresponding DC power generation device 110, and the second terminal b of each inverter 121 is used to connect to the first terminal a of the next adjacent inverter 121 to form a bus path 123.

[0033] In some embodiments, when the current in the power grid 30 is greater than or equal to a first current threshold, a busbar 122 can be independently configured to form a busbar path 123 in the power generation system 10; when the current in the power grid 30 is less than the first current threshold, a busbar path 123 can be integrated into the inverter 121 in the power generation system 10. For example, the first current threshold may be 15A (amperes). This application does not limit the specific value of the first current threshold.

[0034] The DC power generation device 110 can be an electronic device for outputting DC power. For example, the DC power generation device 110 can be any type of DC power generation device such as a photovoltaic module or a hydrogen power generation device. Furthermore, when the DC power generation device 110 is a photovoltaic module, the power generation system 10 also includes an MPPT circuit (…). Figure 1 (Not shown). The MPPT circuit can be set independently or in the DC power generation equipment 110 or inverter 121. This application does not limit the setting method of the MPPT circuit. Understandably, the MPPT circuit is used for maximum power point tracking of photovoltaic modules. This application also does not limit the maximum power point tracking algorithm used by the MPPT circuit.

[0035] Please refer to it again. Figure 1 The monitoring system 20 communicates with the power generation system 10. The monitoring system 20 monitors the operating status of each inverter 121 and / or each DC power generation device 110 in the power generation system 10, and issues alarm information when an abnormality occurs in the power generation system 10 to ensure the normal operation of the power generation system 10. The monitoring system 20 includes at least a processor 210. The processor 210 can be a processor in any electronic device that supports data transmission and reception. Electronic devices can be, for example, smartphones, desktop computers, laptops, or wearable devices. Electronic devices can also be servers, such as independent physical servers, server clusters or distributed systems composed of multiple physical servers, or cloud servers providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN (Content Delivery Network), and big data and artificial intelligence platforms. No restrictions are imposed here.

[0036] In some embodiments, for example, the processor 210 may communicate with each inverter 121 in the power generation system 10 to obtain information reported by each inverter 121 in the power generation system 10. Understandably, the communication between the processor 210 and each inverter 121 can be wired or wireless. For example, the processor 210 may communicate with each inverter 121 via at least one of the following wireless communication methods: serial communication (e.g., Controller Area Network (CAN) bus), parallel communication; or wireless communication (e.g., 3G, 4G, 5G, Wi-Fi, Bluetooth, etc.). This application does not limit this to any particular method.

[0037] Please continue reading. Figure 4 In some embodiments, the monitoring system 20 further includes at least one router 220. Each inverter 121 can communicate with the processor 210 through the router 220. The communication method between the processor 210 and the router 220, and the communication method between the router 210 and each inverter 121, can be either wired or wireless communication, and this application does not limit this.

[0038] In some embodiments, the power grid 30 may be a municipal power grid or other power distribution system. This application does not limit this.

[0039] In some embodiments, the bus path 123 is also connected to electrical equipment (not shown) to enable the power generation system 10 to supply power to the electrical equipment.

[0040] Please continue reading. Figure 5 , Figure 5 This is a flowchart illustrating an automatic layout method provided in an embodiment of this application, applied to a power generation system 10. It is understood that... Figure 5 The method shown can be executed by processor 210 in monitoring system 20. This automatic layout method includes: Step S501: After all inverters are started, obtain the data packet sent by each inverter. The data packet includes the current of the second terminal corresponding to the inverter and the inverter's own serial number.

[0041] In some embodiments, a central control unit may be provided in the power generation system 10. The central control unit communicates with each inverter 121, thereby issuing corresponding instructions to each inverter 121 to control the corresponding inverter 121 to start or stop operation. Understandably, the central control unit may be a controller loaded with an energy management system, and this controller may be a controller in any inverter 121 in the power generation system 10, or the controller may be a controller independently set in the power generation system 10, such as a microcontroller unit (MCU), a digital signal processor (DSP), etc.

[0042] In some embodiments, a current sampling circuit is provided at the second terminal b of each busbar 122 in the power generation system 10. Figure 1 (Not shown) is used to collect the AC current at the second terminal b. Thus, each inverter 121 can be electrically connected to a current sampling circuit on the corresponding bus 122 to obtain the AC current at the second terminal b. In some embodiments, the current sampling circuit may include a current transformer (CT). In other embodiments, the current sampling circuit may also include other electronic components or current sensors capable of current sampling; this application does not limit the specific circuit of the current sampling circuit.

[0043] Understandably, the serial number is used to represent a unique identifier for the corresponding inverter 121. Thus, each inverter 121 in the power generation system 10 has a different serial number. In some embodiments, the serial number may be hardware information preset in the inverter 121, such as a serial number. In other embodiments, the serial number may also be assigned to each inverter 121 by the central control unit after the power generation system 10 is powered on. For example, when the central control unit communicates with the controllers of each inverter 121 based on a Controller Area Network (CAN) communication protocol, the central control unit may assign an identifier to each inverter 121, and this identifier may be associated with the unique device identifier of the corresponding inverter 121. Thus, a unique inverter 121 can also be identified based on the identifier assigned by the central control unit. This application does not limit the source of the serial number of the inverter 121.

[0044] Step S502: Determine the number of each inverter based on the magnitude of all currents, wherein the numerical value of the number is used to indicate the position of the corresponding inverter in the preset topology of the power generation system.

[0045] Understandably, based on the circuit structure of the power generation system 10, when the inverter 121 is operating normally, the current at the second terminal b of each bus 122 on the bus path 123 always gradually increases from the direction away from the grid 30 to the direction closer to the grid 30. That is, on the bus path 123, the transmission line length between different bus 122s and the grid 30 is related to the magnitude of the AC current detected at the second terminal b of the corresponding bus 122. Thus, based on the magnitude of the current obtained by each inverter 121, the transmission line distance between the corresponding bus 122 of each inverter 121 and the grid 30 can be determined, thereby initially determining the location of each inverter 121.

[0046] The preset topology can be preset data stored in the processor 210. This preset topology can be a relational table including numbers, the relationship between the number values ​​and the distance of the transmission line between the inverter 121 and the power grid 30. In the preset topology of the power generation system 10, inverters 121 at different locations can be represented by different numbers. These numbers can be characters with a preset variation pattern. The value of the number is related to the distance of the transmission line between the inverter 121 and the power grid 30. The number of numbers can be equal to the number of inverters 121 in the power generation system 10. In some embodiments, the number can be any one of a series of numbers preset in the monitoring system 20. The value of the number and the distance of the transmission line between the inverter 121 and the power grid 30 can be positively or negatively correlated.

[0047] For example, when the numerical value of the inverter number is positively correlated with the distance of the transmission line between inverter 121 and the power grid 30, then the larger the numerical value of the inverter 121, the farther the transmission line between inverter 121 and the power grid 30. Figure 2 Taking the preset topology of the power generation system 10 shown as an example, the processor 210 can be preset with number 1 and number 2. Based on the current detection results of the second terminal b of the bus 122a and bus 122b, the processor 210 can associate number 2 with inverter 121a and number 1 with inverter 121b.

[0048] Understandably, in other embodiments, the number may also be the letters AZ, or it may be any string that includes numbers and letters.

[0049] Step S503: Associate the number of the same inverter with its corresponding serial number.

[0050] In some embodiments, the processor 210 can establish a lookup table or association table between the number of the same inverter 121 and its corresponding serial number, thereby realizing the association between the number of the same inverter 121 and its corresponding serial number. In this way, the automatic layout of each inverter 121 in the power generation system 10 can be achieved without manual operation.

[0051] Understandably, after executing step S503, when the number or serial number of any inverter 121 is determined, the specific location of the inverter 121 on the bus path 123 can be determined according to the number or serial number, thereby facilitating the location of the inverter 121 in the power generation system 10, and thus facilitating the maintenance or replacement of each inverter 121 in the power generation system 10.

[0052] In summary, the automatic layout method for a power generation system 10 provided in this application first connects the DC terminal of each inverter 121 in the power generation system 10 to the DC power generation device 110, and the AC terminal of each inverter 121 to the corresponding busbar 122. The second terminal b of each busbar 122 is used to connect with the first terminal a of the next adjacent busbar 122 to form a busbar path 123, and the busbar path 123 is used to collect the AC power output from all AC terminals to the power grid 30. Then, the automatic layout method acquires the data packet sent by each inverter 121 after all inverters 121 are started, and the data packet includes the current of the second terminal b corresponding to the inverter 121 and the serial number of the inverter 121 itself. Since the magnitude of the current at the second terminal b corresponding to each inverter 121 is related to the position of the inverter 121 on the bus path 123, the number of each inverter 121 can be determined based on the magnitude of all currents. Different numbers represent inverters 121 at different positions, and the number of the same inverter 121 is associated with its corresponding serial number. Thus, the position of any inverter 121 on the bus path 123 can be determined based on its number or serial number, thereby achieving automatic layout of multiple inverters 121 in the power generation system 10 without manual operation, effectively reducing the time and labor costs of layout in the power generation system 10.

[0053] In some embodiments, steps S501 to S502 can be performed each time the power generation system 10 is powered on, so that the inverter information in the power generation system 10 can be updated in a timely manner during each power-on cycle.

[0054] Please continue reading. Figure 6 In some embodiments, step S502 includes the following sub-steps: Step S601: Sort all currents according to their magnitude to obtain the first-level relationship.

[0055] The first-level relationship is used to represent the sorting relationship of all acquired currents from largest to smallest, or from smallest to largest. Understandably, this application does not restrict the sorting algorithm used by the processor 210.

[0056] Step S602: Assign a number to all inverters according to the first-level relationship.

[0057] As described above, the numerical value of the serial number can be positively or negatively correlated with the distance between the inverter 121 and the power grid 30. Furthermore, the number of serial numbers can be equal to the number of inverters 121. Thus, based on the first-level relationship and the distance relationship between the inverter 121 and the power grid 30 represented by the serial number values, each current in the first-level relationship can be associated with a corresponding serial number.

[0058] For example, taking Arabic numerals as an example, when all currents in the first-level relationship are arranged in descending order, and the value of the number is positively correlated with the distance of the transmission line between inverter 121 and grid 30, then the inverter 121 corresponding to each current in the first-level relationship from largest to smallest will also have a number from smallest to largest.

[0059] Understandably, since DC power generation equipment 110 may also fail, when performing step S602, it is also necessary to further consider configuring the number of each inverter 121 and identifying the corresponding faulty inverter when inverter 121 fails.

[0060] For example, in some embodiments, step S602 includes: in the first hierarchy relationship, when the difference between any two adjacent currents is greater than or equal to a first preset threshold, the corresponding inverters are configured with numbers in sequence according to the first hierarchy relationship.

[0061] Understandably, when inverter 121 is operating normally, the AC output current at the AC terminal of inverter 121 is always greater than a certain threshold, and on the busbar 123, the current at the second terminal b of busbar 122 always accumulates from the direction away from the grid 30 to the direction closer to the grid 30. Therefore, when the difference between the currents corresponding to any two adjacent inverters 121 is greater than the first preset threshold, it indicates that each inverter 121 in the power generation system 10 is operating normally, and its number can be configured normally. Conversely, when the difference between two adjacent currents is detected to be less than the first preset threshold in the first-level relationship, it is possible that one of the two inverters 121 corresponding to those two currents is experiencing an abnormality, resulting in the inability to output AC power normally, thus making the values ​​of the two adjacent currents relatively close.

[0062] For example, please refer to [link / reference] again. Figure 2 ,when Figure 2In the power generation system 10, if inverter 121a is operating normally and outputs AC power, while inverter 121b malfunctions and cannot output AC power, the current detected at the second terminal b of bus 122a and the second terminal b of bus 122b should ideally be equal. However, in reality, to reduce detection errors, the fault status of the corresponding inverter 121 is usually determined by comparing the difference between two adjacent currents in the first-level relationship with a first preset threshold. In the first-level relationship, when the difference between two adjacent currents is greater than or equal to the first preset threshold, it indicates that the two inverters 121 corresponding to those two currents are likely operating normally and outputting AC power. Therefore, in this embodiment, when the difference between any two adjacent currents is greater than or equal to the first preset threshold, the corresponding inverters can be configured with numbers according to the first-level relationship to achieve automatic layout of multiple inverters in the power generation system 10.

[0063] In some embodiments, the first preset threshold can be a positive value. Understandably, the specific value of the first preset threshold can be set according to the specific specifications of different inverters 121, and this application does not limit the specific value of the first preset threshold.

[0064] Please see Figure 7 In some embodiments, step S602 further includes the following sub-steps S701 to S703. The specific steps are as follows: Step S701: In the first level relationship, when the difference between two adjacent currents is less than or equal to the first preset threshold, the first identifier of the inverter corresponding to the two currents is set to mark it as an inverter to be investigated.

[0065] As described above, in the first-level relationship, when the difference between two adjacent currents is less than or equal to a first preset threshold, it indicates that at least one of the two inverters 121 corresponding to the two currents may fail.

[0066] Step S702: Identify the faulty inverter based on the inverter to be investigated, and control the faulty inverter to stop working.

[0067] In step S702, the abnormal inverter can be identified by controlling the inverter to be investigated to work independently in sequence and detecting the current of the second terminal of the corresponding busbar.

[0068] For example, please continue reading Figure 8 In some embodiments, step S702 includes the following sub-steps: Step S801: Control the inverter to be checked to work individually in sequence, while controlling other inverters to stop working.

[0069] Thus, by executing step S801, the operating status of the inverter 121 to be investigated can be determined by sequentially detecting the current on the second terminal b corresponding to the inverter 121 to be investigated.

[0070] Step S802: When the current of the second terminal corresponding to the inverter to be investigated is less than the second preset threshold, the second identifier of the inverter to be investigated is set to mark it as an abnormal inverter.

[0071] The second preset threshold is used to represent the minimum value of the AC current output by the inverter 121 when it is operating normally. Thus, when the current at the second terminal of the inverter under investigation is less than the second preset threshold, it indicates that the inverter under investigation is in an abnormal operating state, and therefore the second identifier of the inverter under investigation is set to mark it as an abnormal inverter.

[0072] Step S803: When the current of the second terminal corresponding to the inverter to be investigated is detected to be greater than or equal to the second preset threshold, reset the first identifier of the inverter to be investigated.

[0073] Accordingly, when the current at the second terminal of the inverter under investigation is detected to be greater than or equal to the second preset threshold, it indicates that the inverter under investigation is in normal working condition. Therefore, the first identifier of the inverter under investigation is reset to mark the inverter under investigation as a normal inverter, which can discharge normally to the grid 30.

[0074] In some embodiments, both the first preset threshold and the second preset threshold are positive values, and the second preset threshold may be less than the first preset threshold. This application does not limit the specific value of the second preset threshold.

[0075] In some embodiments, the processor 210 may issue corresponding control commands to the central control unit of the power generation system 10, and the central control unit may set the first identifier of the inverter 121 corresponding to the two currents according to the control commands, and the central control unit may identify the abnormal inverter and control the abnormal inverter to stop working.

[0076] For example, the control command issued by processor 210 may include the serial number of inverter 121 corresponding to the two currents. Upon receiving the control command, the central control unit can look up the first identifier of the corresponding inverter 121 based on the received serial number and set it to mark it as an inverter to be investigated. Then, based on the inverter to be investigated, the abnormal inverter is determined. The central control unit also uploads the serial number of the determined abnormal inverter to processor 210. Thus, processor 210 can mark the corresponding current as an abnormal value in the first-level relationship.

[0077] Understandably, in other embodiments, the processor 210 may also directly issue control commands to each inverter 121 to set the first identifier of the inverter to be checked, and determine the abnormal inverter based on the inverter to be checked. This application does not limit the specific form in which the processor 210 implements steps S701 and S702.

[0078] Understandably, an abnormal inverter refers to an inverter that cannot output AC power normally. In some embodiments, the abnormal inverter may be due to a fault in the inverter 121 itself or a fault in the DC power generation equipment 110 connected to the abnormal inverter. This application does not limit the specific cause of the abnormal inverter's failure.

[0079] Step S703: Assign numbers to all inverters according to the first-level relationship and the abnormal inverters.

[0080] Understandably, on the busbar 123 formed by the power generation system 10, from the direction away from the grid 30 to the direction closer to the grid 30, the current on the second terminal b of the busbar 122 always gradually increases or there are two or more consecutive equal values. That is, in the first-level relationship, the current always gradually increases or there are two or more consecutive equal values. Among them, since the current value of the second terminal b of the busbar 122 corresponding to the abnormal inverter is always greater than or equal to the current value of the second terminal b corresponding to the adjacent inverter 121 which is further away from the grid 30, in the first-level relationship, when there are two or more adjacent equal currents, that is, when two or more inverters to be investigated are identified, the normally operating inverter 121 always corresponds to the one of the two or more inverters to be investigated that is further away from the grid 30.

[0081] Thus, in step S703, when the current gradually increases in the first level relationship, all inverters 121 and abnormal inverters are directly assigned numbers according to the first level relationship, and an abnormal number group is generated, wherein the abnormal number group includes the number of the abnormal inverter.

[0082] When adjacent equal currents exist in the first-level relationship, all inverters 121 are assigned numbers according to the first-level relationship, and at least one number group is determined to identify an abnormal number group based on the number group. Each number group represents the set of numbers corresponding to equal currents. The number of numbers in the abnormal number group is always less than the number of numbers in the number group.

[0083] Specifically, when two adjacent currents are equal in the first-level relationship, the inverters to be investigated corresponding to these two equal currents and their corresponding two numbers can be identified as a number group. Since in step S702, an abnormal inverter can be identified from the two inverters to be investigated, and this abnormal inverter corresponds to the number whose numerical value indicates it is closer to the power grid 30, an abnormal number group can be identified from the number group, and the abnormal number group includes the number corresponding to the abnormal inverter.

[0084] When three or more adjacent currents are equal in the first-level relationship, three or more inverters to be investigated corresponding to these equal currents can be identified, along with a number group containing three or more numbers. Since in step S702, one normally functioning inverter 121 and two or more abnormal inverters can be identified, and the normally functioning inverter corresponds to a number in the number group that is further away from the power grid 30, the abnormal number group can be identified from the number group. Furthermore, the abnormal number group includes numbers corresponding to two or more abnormal inverters.

[0085] In some embodiments, after confirming the abnormal number group, the processor 210 can issue a corresponding warning message to remind technicians to check or replace the corresponding abnormal inverter. Thus, compared to the manual layout method in related technologies, the automatic layout method provided in this application, since it has already confirmed the number group corresponding to the abnormal inverter in the power generation system, can significantly reduce the scope of inverter troubleshooting for technicians.

[0086] Please refer to it again. Figure 1 This application also provides an automatic layout method applied to a power generation system 10, wherein the power generation system 10 communicates with a monitoring system 20. The monitoring system includes a processor 210. The power generation system 10 includes at least two inverters 121, at least two DC power generation devices 110, and at least two busbars 122. Each busbar 122 includes a first terminal a and a second terminal b. The DC terminal of each inverter 121 is connected to the corresponding DC power generation device 110, and the AC terminal of each inverter 121 is connected to the corresponding busbar 122. The second terminal b of each busbar 122 is connected to the first terminal a of the next adjacent busbar 122 to form a busbar path 123. The first terminal a of the busbar 122 at the first end of the busbar path 123 is open-circuited, and the second terminal b of the busbar 122 at the second end of the busbar path 123 is connected to the power grid 30. The busbar path 123 is used to collect the AC power output from all AC terminals to the power grid 30. The method includes the following steps: After all inverters 121 are started, each inverter 121 sends a data packet to the processor 210. The data packet includes the current of the second terminal b corresponding to the inverter 121 and the serial number of the inverter 121 itself. The processor 210 receives data packets sent by each inverter 121; The processor 210 determines the number of each inverter 121 based on the magnitude of all currents, wherein the numerical value of the number is used to indicate the position of the corresponding inverter 121 in the preset topology of the power generation system 10. The processor 210 is associated with the number and corresponding serial number of the same inverter 121.

[0087] Understandably, the processor 210 is also used to execute the automatic layout method provided in any of the above embodiments. For specific execution details, please refer to the above description, which will not be repeated here.

[0088] Please refer to it again. Figure 1 and Figure 3 An embodiment of this application also provides a power generation system 10, including at least two inverters 121, at least two DC power generation devices 110, and at least two busbars 122. Each busbar 122 includes a first terminal a and a second terminal b. The DC terminal of each inverter 121 is connected to the corresponding DC power generation device 110, and the AC terminal of each inverter 121 is connected to the corresponding busbar 122. The second terminal b of each busbar 122 is connected to the first terminal a of the next adjacent busbar 122 to form a busbar path 123. In this circuit, the first terminal a of the busbar 122 at the first end of the busbar 123 is open, and the second terminal b of the busbar 122 at the second end of the busbar 123 is used to connect to the power grid 30. The busbar 123 is used to collect the AC output from all AC terminals to the power grid 30. The inverter 121 is also used to send data packets, which include the current of the second terminal b of the busbar 122 corresponding to the inverter 121 and the serial number of the inverter 121 itself.

[0089] The busbar 122 is set independently of the corresponding inverter 121, or the busbar 122 is set in the corresponding inverter 121.

[0090] Please refer to it again. Figure 1 and Figure 4 An embodiment of this application also provides a monitoring system 20, which includes at least a processor 210. The monitoring system 20 communicates with the power generation system 10, and the processor 210 is used for: After all inverters 121 are started, the data packet sent by each inverter 121 is received. The data packet includes the current of the second terminal b corresponding to inverter 121 and the serial number of inverter 121 itself. Each inverter 121 is numbered according to the magnitude of all currents, wherein the numerical value of the number is used to indicate the position of the corresponding inverter 121 in the preset topology of the power generation system 10. Associate the number of the same inverter 121 with its corresponding serial number.

[0091] In some embodiments, the monitoring system 20 further includes at least one router 220, through which each inverter 121 sends data packets to the processor 210.

[0092] Understandably, the processor 210 is also used to execute the automatic layout method provided in any of the above embodiments. For specific execution details, please refer to the above description, which will not be repeated here.

[0093] Please see Figure 9 This application provides an electronic device 300, including a memory 310 and a processor 210. When instructions in the memory 310 are executed, the processor 210 is used to: After all inverters 121 are started, the data packet sent by each inverter 121 is received. The data packet includes the current of the second terminal b corresponding to inverter 121 and the serial number of inverter 121 itself. Each inverter 121 is numbered according to the magnitude of all currents, wherein the numerical value of the number is used to indicate the position of the corresponding inverter 121 in the preset topology of the power generation system 10. Associate the number of the same inverter 121 with its corresponding serial number.

[0094] In some embodiments, the monitoring system 20 further includes at least one router 220, through which each inverter 121 sends data packets to the processor 210.

[0095] Understandably, the processor 210 is also used to execute the automatic layout method provided in any of the above embodiments. For specific execution details, please refer to the above description, which will not be repeated here.

[0096] Please see Figure 10 This application also provides a computer storage medium 400 that stores a computer program 410. When the computer program 410 is executed by the processor 210, the processor 210 executes the data processing method provided in any of the above embodiments.

[0097] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer storage medium or transmitted through the computer storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital versatile discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0098] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks. Unless otherwise specified, the technical features of this embodiment and its implementation can be combined arbitrarily.

[0099] This application is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions exist for the test fixture without departing from the principles and scope of this application. The scope of protection of this application is determined by the claims.

Claims

1. An automatic layout method applied to a power generation system, characterized in that, The power generation system includes at least two inverters, at least two DC power generation devices, and at least two busbars. Each busbar includes a first terminal and a second terminal. The DC terminal of each inverter is connected to the corresponding DC power generation device, and the AC terminal of each inverter is connected to the corresponding busbar. The second terminal of each busbar is connected to the first terminal of the next adjacent busbar to form a busbar path. The first terminal of the busbar at the first end of the busbar path is open-circuited, and the second terminal of the busbar at the second end of the busbar path is connected to the power grid. The busbar path is used to collect the AC power output from all the AC terminals into the power grid. The method includes: After all the inverters are started, the data packet sent by each inverter is obtained. The data packet includes the current of the second terminal corresponding to the inverter and the serial number of the inverter itself. The number of each inverter is determined based on the magnitude of all the currents, wherein the value of the number is used to indicate the position of the corresponding inverter in the preset topology of the power generation system; The number of the same inverter is associated with the corresponding serial number.

2. The method according to claim 1, characterized in that, Determining the number of each inverter based on the magnitude of all the currents includes: The first-order relationship is obtained by sorting all the currents according to their magnitudes; The number is assigned to all the inverters according to the first hierarchical relationship.

3. The method according to claim 2, characterized in that, The step of configuring the number for all the inverters according to the first hierarchical relationship includes: In the first hierarchical relationship, when the difference between any two adjacent currents is greater than or equal to a first preset threshold, the corresponding inverters are configured with the number according to the first hierarchical relationship.

4. The method according to claim 2, characterized in that, The step of configuring the number for all the inverters according to the first hierarchical relationship further includes: In the first level relationship, when the difference between two adjacent currents is less than a first preset threshold, the first identifier of the inverter corresponding to the two currents is set to mark it as an inverter to be investigated. The abnormal inverter is identified based on the inverter to be investigated, and the abnormal inverter is controlled to stop working. The number is assigned to all inverters according to the first hierarchical relationship and the abnormal inverter.

5. The method according to claim 4, characterized in that, The step of determining the abnormal inverter based on the inverter to be investigated includes: The inverters to be investigated are controlled to work individually in sequence, while the other inverters are controlled to stop working. When the current at the second terminal corresponding to the inverter to be investigated is less than the second preset threshold, the second identifier of the inverter to be investigated is set to mark it as the abnormal inverter. When the current at the second terminal corresponding to the inverter under investigation is detected to be greater than or equal to the second preset threshold, the first identifier of the inverter under investigation is reset.

6. An automatic layout method applied to a power generation system, the power generation system communicating with a monitoring system, the monitoring system including a processor, characterized in that, The power generation system includes at least two inverters, at least two DC power generation devices, and at least two busbars. Each busbar includes a first terminal and a second terminal. The DC terminal of each inverter is connected to the corresponding DC power generation device, and the AC terminal of each inverter is connected to the corresponding busbar. The second terminal of each busbar is connected to the first terminal of the next adjacent busbar to form a busbar path. The first terminal of the busbar at the first end of the busbar path is open-circuited, and the second terminal of the busbar at the second end of the busbar path is connected to the power grid. The busbar path is used to collect the AC power output from all the AC terminals into the power grid. The method includes: After all the inverters are started, each inverter sends a data packet to the processor. The data packet includes the current of the second terminal corresponding to the inverter and the inverter's own serial number. The processor receives data packets sent by each of the inverters. The processor determines the number of each inverter based on the magnitude of all the currents, wherein the value of the number is used to indicate the position of the corresponding inverter in the preset topology of the power generation system; The processor is associated with the inverter's number and the corresponding serial number.

7. A power generation system, characterized in that, The power generation system includes at least two inverters, at least two DC power generation devices, and at least two busbars. Each busbar includes a first terminal and a second terminal. The DC terminal of each inverter is used to connect to the corresponding DC power generation device, and the AC terminal of each inverter is connected to the corresponding busbar. The second terminal of each busbar is used to connect to the first terminal of the next adjacent busbar to form a busbar path. The first terminal of the busbar at the first end of the busbar path is open-circuited, and the second terminal of the busbar at the second end of the busbar path is used to connect to the power grid. The busbar path is used to collect the AC power output from all the AC terminals to the power grid.

8. The power generation system according to claim 7, characterized in that, The busbar is set independently of the corresponding inverter, or the busbar is set in the corresponding inverter.

9. A monitoring system, comprising at least a processor, characterized in that, The monitoring system communicates with the power generation system as described in claim 7 or 8, and the processor is used for: After all the inverters are started, a data packet sent by each inverter is received, the data packet including the current of the second terminal corresponding to the inverter and the inverter's own serial number; The number of each inverter is determined based on the magnitude of all the currents, wherein the value of the number is used to indicate the position of the corresponding inverter in the preset topology of the power generation system; The number of the same inverter is associated with the corresponding serial number.

10. The monitoring system according to claim 9, characterized in that, The monitoring system also includes at least one router, through which each inverter sends the data packet to the processor.

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