Aging test method for photovoltaic power electronic equipment

Abstract

The invention relates to the technical field of photovoltaic equipment testing, and discloses an aging test method for photovoltaic power electronic equipment, and the method comprises the steps: transmitting a test signal to each piece of tested equipment; receiving test data returned by each tested device based on the test signal; the test data comprises a physical address of the tested equipment; determining whether the test data corresponding to each tested device is abnormal or not; when it is determined that the abnormal test data exist, determining a physical position and a physical address corresponding to the abnormal tested equipment according to the abnormal test data and the corresponding relation between the physical position and the physical address of each tested equipment; the abnormal tested equipment is tested equipment corresponding to the abnormal test data. The cost can be reduced, and the fault positioning precision can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic device testing, in particular to an aging test method of photovoltaic power electronic devices. BACKGROUND

[0002] As a core component of photovoltaic power generation systems, the operation reliability of photovoltaic power electronic devices directly determines the power generation efficiency and safety and stability of the entire photovoltaic power station. Therefore, before the devices are shipped, aging tests are performed to simulate the working state under the actual operating environment, and potential performance defects and fault risks are screened out to become a common way to ensure the operation reliability of the devices. However, the current mainstream aging test scheme of photovoltaic power electronic devices generally has a high cost and low fault positioning accuracy. SUMMARY

[0003] The present application provides an aging test method of photovoltaic power electronic devices to solve the problems of high aging test cost and low fault positioning accuracy.

[0004] In a first aspect, the present application provides an aging test method of photovoltaic power electronic devices, which comprises: sending a test signal to each of the devices under test; receiving test data returned by each of the devices under test based on the test signal; the test data is collected by a built-in collection device of the device under test; the test data includes the physical address of the device under test; determining whether the test data corresponding to each of the devices under test is abnormal; when it is determined that the test data is abnormal, determining the physical location and physical address corresponding to the abnormal device under test according to the correspondence between the abnormal test data and the physical location and physical address of each of the devices under test; the abnormal device under test is the device under test corresponding to the abnormal test data.

[0005] The traditional test needs to additionally configure a dedicated power supply, a load, and an external sampling sensor, which has a high cost. The method provided in the embodiment directly uses the voltage, current, and temperature collection modules integrated in the photovoltaic power electronic devices to obtain test data, without the need for additional sampling sensors. The test data transmission and state judgment are realized through signal interaction, without the need for additional construction of a test loop of a power supply, a device under test, and a load, which significantly reduces the aging test cost.

[0006] The method provided in the embodiment adopts the built-in data collection device of the measured device to collect data, and the test data obtained can directly reflect the working state of the measured device, avoiding signal interference and transmission loss caused by externally setting sampling sensors. Meanwhile, the test data contains the physical address of the measured device, ensuring the unique correspondence between the test data and the measured device, providing accurate data basis for subsequent abnormality judgment, and effectively improving the reliability of the aging test result.

[0007] In the conventional test, when data abnormity occurs, the measured devices need to be manually checked one by one, which is extremely low in efficiency and prone to errors. The method provided in the embodiment can directly lock the specific physical position of the abnormal measured device through the physical address in the test data after detecting the abnormal test data, without manually searching one by one, greatly shortening the abnormality checking time and significantly improving the overall process efficiency of the aging test.

[0008] In an optional implementation, before determining the abnormal measured device and the physical position corresponding to the abnormal measured device, the method further includes: obtaining the physical position of each measured device; broadcasting a positioning packet to each measured device; obtaining response data returned by each measured device based on the positioning packet; the response data includes the physical address of the receiver, the physical address of the sender and the attenuation amount corresponding to the positioning packet; wherein the measured device forwards the positioning packet after receiving the positioning packet; obtaining the target physical address of the target measured device; the target measured device is a measured device that directly receives the positioning packet and does not obtain the positioning packet through other measured devices; determining the correspondence between the physical position and the physical address of each measured device according to the target physical address of the target measured device, the physical position of each measured device and the response data.

[0009] The method provided in the embodiment broadcasts the positioning packet to the measured device, so that the measured device automatically forwards and feeds back the physical address and the attenuation amount of the receiver and the sender after receiving the packet, and the communication association information between the measured devices can be obtained without manual intervention. The physical address of the target measured device is used as an anchor point, and the distance relationship between the measured devices is determined according to the attenuation amount, realizing the automatic and contactless mapping of the physical address and the physical position, avoiding the errors caused by manual recording, greatly improving the mapping efficiency, ensuring the stability of the correspondence between the physical address and the physical position, and providing a reliable basis for subsequent positioning of the abnormal measured device.

[0010] In an optional implementation, the determining of the correspondence between the physical location and the physical address of each of the DUTs according to the target physical address of the target DUT, the physical location of each of the DUTs, and the response data comprises: repeatedly performing the following determining step until the correspondence between the physical location and the physical address of all the DUTs is determined; filtering the attenuation amount corresponding to the physical address targeted this time from the response data to obtain the attenuation amount targeted this time; wherein the physical address targeted the first time is the target physical address as the receiver and the sender is the sending end, and the physical address targeted each time thereafter is the physical address of the receiver and the sender is the physical address targeted the last time; the physical address targeted this time does not include the physical address of the DUT whose correspondence has been determined; and the sending end is configured to generate the positioning packet; determining the correspondence between the physical location and the physical address of the DUT targeted this time according to the size relationship between the attenuation amounts targeted this time; wherein the DUT targeted the first time is the target DUT, and the DUT targeted each time thereafter is the DUT closest to the DUT targeted the last time, and the DUT targeted this time does not include the DUT whose correspondence has been determined.

[0011] In a batch testing scenario, the number of DUTs is large and the distribution of the group string is complex, and direct analysis of the response data of all the DUTs is prone to link confusion. The method provided in this embodiment uses a repeated iterative determining step, takes the physical address of the target DUT as the core the first time, takes the physical address determined the last time as the reference each time thereafter, gradually expands the mapping range, and excludes the DUT whose correspondence has been determined, thereby avoiding data cross interference. The initial mapping is established through the target DUT, and then the adjacent DUTs of each target DUT are matched in turn, and the mapping of all the DUTs is gradually completed, thereby decomposing the complex overall problem into a simple step-by-step problem and reducing the complexity of data processing.

[0012] The method provided in this embodiment clearly defines the physical address targeted each time (the target physical address the first time and the physical address targeted the last time), and limits the DUT targeted this time to not include the DUT whose correspondence has been determined, thereby forming an ordered mapping process. This step-by-step advancing logic avoids the problems of repeated matching or missed matching, ensures that the physical address of each DUT can be accurately corresponded to a unique physical location, and is particularly suitable for testing scenarios with group string installation and dense device arrangement, thereby making the mapping process more logical and traceable.

[0013] Furthermore, the step-by-step logic determination eliminates the need to wait for all response data from the devices under test to be fully collected before analysis. Instead, it determines the correspondence of a portion of the devices under test with each iteration, advancing the mapping process in parallel. This reduces the overall mapping waiting time, shortens the preparation phase of aging tests, and improves the efficiency of the entire testing process.

[0014] In one optional implementation, when the attenuation amount targeted this time is the same as the attenuation amount targeted initially, determining the correspondence between the physical location and physical address of the device under test based on the magnitude relationship between the attenuation amounts targeted this time includes: Based on the physical location of the target device under test, the target devices under test are sorted in descending order of distance from the transmitting end; the physical addresses initially targeted are then matched one-to-one with the physical locations of the sorted target devices under test in descending order of attenuation, thereby establishing a correspondence between the physical locations and physical addresses of the target devices under test.

[0015] The method provided in this embodiment addresses a situation where the target device under test (DUT) directly receives the location message from the sender. The attenuation varies depending on the DUT's distance from the sender. This embodiment sorts the DUTs by distance from the sender, from furthest to closest, and simultaneously sorts the initially targeted physical addresses by attenuation, from largest to smallest. By establishing a one-to-one correspondence based on the physical law that greater distance results in greater attenuation, the mapping between the DUT's physical address and physical location is quickly completed. No complex link analysis is required; the DUT can be located simply through sorting and matching, significantly improving the efficiency of the initial mapping.

[0016] Ensuring accurate string differentiation: In multi-string testing scenarios, the distance between the target device under test (DUT) and the transmitter varies across different strings, resulting in distinct attenuation levels. For example, among the anchor devices in four strings, the anchor closest to the central coordinator experiences the least attenuation, while the furthest experiences the most. By matching the attenuation ranking with the physical location ranking, the target DUT of different strings can be clearly distinguished, avoiding mapping errors caused by string confusion. This logic lays the foundation for subsequent mapping of devices within each string, ensuring the accuracy of the overall mapping result.

[0017] In one optional implementation, when the attenuation amount targeted in this instance is the same as the attenuation amounts targeted in each subsequent instance, determining the correspondence between the physical location and physical address of the device under test based on the magnitude relationship between the attenuation amounts targeted in this instance includes: determining the physical address of the receiver corresponding to the minimum attenuation in the attenuation range, establishing a corresponding relationship between the physical address of the receiver corresponding to the minimum attenuation and the physical location of the measured device in this round, and thus obtaining the corresponding relationship between the physical location and the physical address of the measured device in this round.

[0018] The method provided in the embodiment is used in a group string installation scenario, in which the cable length between adjacent measured devices is consistent, the signal attenuation is relatively fixed, and the attenuation between adjacent measured devices is much smaller than that between non-adjacent measured devices. The embodiment determines the physical address of the receiver corresponding to the minimum attenuation in the attenuation range, and the physical address is the adjacent measured device of the measured device in the last round, i.e., the measured device in this round, so that the mapping between the physical address and the physical location of all the measured devices in the group string is gradually constructed in the order of the target measured device→adjacent device→next adjacent device, and the accuracy of the constructed corresponding relationship is improved.

[0019] In an optional implementation, before determining the corresponding relationship between the physical location and the physical address of each measured device according to the target physical address of the target measured device, the physical location of each measured device, and the response data, the method further includes: determining the physical address corresponding to each measured device according to the response data corresponding to each measured device, or sending a networking signal to each measured device to obtain the physical address returned by each measured device based on the networking signal, and thus obtaining the physical address corresponding to each measured device.

[0020] The method provided in the embodiment provides multiple ways of obtaining the physical address corresponding to each measured device. In one way, the physical address is directly extracted from the response data, and the physical address is extracted synchronously when the response data is obtained, without the need of sending an additional networking signal, and the process continuity is improved. In another way, the physical address is obtained through a special networking signal, the networking signal is sent to each measured device, the physical address returned by each measured device based on the networking signal is obtained, and the physical address is comprehensively collected.

[0021] In a scenario in which the number of measured devices is large and the communication link is complex, some measured devices may not timely forward the positioning packet due to signal delay or interference, and in this case, the address of all the measured devices can be reported by force through the networking signal. In a scenario in which the communication state of the device is good and the response data is complete, the address can be directly extracted from the response data, and the process is simplified. This flexible acquisition mode can adapt to the testing requirements in different communication environments, and the robustness of the method is enhanced.

[0022] In an alternative embodiment, the acquiring the physical position of each of the devices under test comprises: determining the physical position of each of the devices under test based on a construction topology; the construction topology comprising the installation position of each of the devices under test in a physical space.

[0023] The method provided by the embodiment determines the installation position of each device under test in a physical space based on the construction topology, which is a direct basis for the physical position of the device under test. The physical position is acquired based on the construction topology, which avoids the position deviation caused by manual field measurement or estimation, and ensures the accuracy of the physical position. The construction topology is determined during the installation of the device, and there is no need to additionally invest manpower and material resources to measure the position of the device during the aging test stage. Only the position information in the structure needs to be directly called, which greatly simplifies the acquisition process of the physical position.

[0024] In a second aspect, the application provides a construction topology, comprising: a plurality of photovoltaic strings and a central coordinator; Each of the photovoltaic strings comprises a plurality of devices under test connected in series, and the length of the connection line between each adjacent two devices under test is the same; each of the devices under test is configured with an independent power supply; The positive terminal of each of the photovoltaic strings is connected with the central coordinator, and the devices under test and the central coordinator communicate through the power line carrier communication mode.

[0025] In a third aspect, the application provides an electronic device, comprising a memory and a processor, which are communicatively connected with each other, and the memory stores computer instructions; the processor executes the computer instructions to perform the aging test method of the photovoltaic power electronic device according to the first aspect or any one of the corresponding embodiments thereof.

[0026] In a fourth aspect, the application provides a computer readable storage medium, which stores computer instructions for causing a computer to execute the aging test method of the photovoltaic power electronic device according to the first aspect or any one of the corresponding embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1is a flowchart of an aging test method of a photovoltaic power electronic device according to an embodiment of the present application; Figure 2 is a construction topology diagram according to an embodiment of the present application; Figure 3 is a forwarding relationship diagram according to an embodiment of the present application; Figure 4 is a hardware structure diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0030] It can be understood that, before using the technical solutions disclosed in the embodiments of the present application, the type, use range, use scenario and the like of the personal information involved in the present application should be informed to the user and the authorization of the user should be obtained according to relevant laws and regulations through appropriate means.

[0031] According to the embodiments of the present application, a kind of aging test method of photovoltaic power electronic device is provided, it needs to be explained, the steps shown in the flowchart of the drawing can be executed in computer system such as a group of computer executable instructions, and although logical order is shown in flowchart, in some cases, the steps shown or described can be executed in different order from here.

[0032] In the present embodiment, an aging test method of a photovoltaic power electronic device is provided, Figure 1 is a flowchart of an aging test method of a photovoltaic power electronic device according to an embodiment of the present application, as Figure 1 shown, the flow includes the following steps: S101: send a test signal to each device under test.

[0033] In the embodiment of the present application, the aging test is implemented based on the construction topology structure with both aging test and normal working functions, thereby reducing the cost of the aging test. The construction topology structure includes a central coordinator (CCO) and a device under test. The central coordinator and the device under test communicate with each other through a power line communication (PLC) mode. Each device under test is regarded as a STA node. The aging test method of the photovoltaic power electronic device in the embodiment of the present application is applied to the central coordinator. The device under test is a photovoltaic power electronic device, which may be a contactor as an example. The device under test is built-in with a PLC chip. The PLC chip is strictly screened before leaving the factory, so as to ensure that the communication performance of all chips, such as signal sensitivity and output power, is within a small range.

[0034] When the aging test is performed based on the construction topology structure, the central coordinator as a sending end can generate and send a test signal to each device under test, or broadcast a positioning message and a networking signal to each device under test. When the normal working control is performed based on the construction topology structure, the central coordinator as a control end and the device under test as a working unit / device, the central coordinator as the control end can send a control instruction to each working device and receive the running state feedback of each device, thereby realizing the cooperative scheduling and real-time monitoring of the entire power electronic system. As an example, when the working device is a contactor, the contactor can be connected in series between a direct current power supply and a core power electronic device, such as an inverter or a converter, in the power electronic system. The control instruction can be a on-off instruction. By controlling the on-off state of the contactor, the on-off state of the circuit in which the contactor is located is controlled, the power transmission of the direct current main circuit is cut off, and the core device is protected from the damage caused by the overcurrent, short circuit or polarity reverse connection on the direct current side.

[0035] S102: receiving test data returned by each device under test based on the test signal.

[0036] In the embodiment of the present application, the test data is collected by a collection device built-in the device under test. The test data includes a physical address of the device under test, i.e., a media access control address / Mac address. The physical address is used to uniquely identify the device under test and distinguish the device under test. The test data further includes running related data, such as input voltage, output voltage, input current, output current and temperature. The running related data is collected through a sampling function of the device under test, without the need of additional sensors. In the embodiment of the present application, the specific type and setting position of the collection device are not limited, as long as the collection of the running related data can be realized.

[0037] In the embodiment of the present application, after the measured device responds to the test signal, the test data is collected by the built-in acquisition device of the measured device, and then the test data is returned to the central coordinator in the PLC communication mode to complete the data upload closed loop. The built-in acquisition device of the measured device, i.e., the sampling module provided by the off switch, is integrated with the PLC chip, and does not need to additionally install voltage sensors, current sensors, and temperature sensors, thereby directly reducing the test cost. After the measured device receives the test signal, the built-in acquisition device starts data collection, and after the collection is completed, the collected data and the physical address of the measured device are returned to the central coordinator as test data.

[0038] S103: Determine whether the test data corresponding to each measured device is abnormal.

[0039] In the embodiment of the present application, it is mainly determined whether the running related data in the test data corresponding to each measured device is abnormal. The normal threshold range corresponding to different running related data types can be set in advance, for example, the input voltage normal threshold range corresponding to the input voltage, the output voltage normal threshold range corresponding to the output voltage, the input current normal threshold range corresponding to the input current, the output current normal threshold range corresponding to the output current, and the temperature normal threshold range corresponding to the temperature. If the running related data of a certain type of a certain measured device exceeds the corresponding preset normal threshold range, or the data fluctuation amplitude exceeds the allowable deviation, it is determined that the test data of the measured device is abnormal. The central coordinator is built-in with a verification logic, which matches the test data corresponding to each Mac address with the normal threshold range one by one. If any one of the test data of a certain measured device exceeds the normal threshold range, the test data of the measured device is directly marked as abnormal test data, and the measured device is an abnormal measured device.

[0040] S104: When the abnormal test data is determined, the physical location and the physical address corresponding to the abnormal measured device are determined according to the correspondence between the abnormal test data and the physical location and the physical address of each measured device.

[0041] In the embodiment of the present application, the abnormal measured device is the measured device corresponding to the abnormal test data. When the abnormal test data is detected, the specific installation position of the abnormal measured device is quickly locked by combining the established correspondence between the physical address and the physical location, without manually checking one by one. In the embodiment of the present application, after all the measured devices are installed according to the construction topology, the correspondence between the physical location and the physical address of each measured device is unknown, and the correspondence between the physical location and the physical address of each measured device needs to be determined in advance. The present application realizes data collection and device positioning in the aging process of the measured device through PLC communication technology, ensures efficient and accurate testing, and realizes automatic mapping of Mac address and physical location.

[0042] The traditional test needs to additionally configure a dedicated power supply, a load and an external sampling sensor, and the cost is high. The method provided in the embodiment directly uses the voltage, current and temperature acquisition modules integrated in the photovoltaic power electronic equipment to obtain test data, without the need of additionally installing a sampling sensor. The test data transmission and state judgment are realized through signal interaction, without the need of additionally constructing a test loop of a power supply, a device under test and a load, thereby significantly reducing the aging test cost.

[0043] The method provided in the embodiment uses the built-in acquisition device of the device under test to collect data, and the obtained test data can directly reflect the working state of the device under test, avoiding signal interference and transmission loss caused by the external sampling sensor. Meanwhile, the test data contains the physical address of the device under test, ensuring the unique correspondence between the test data and the device under test, providing accurate data basis for subsequent abnormality judgment, and effectively improving the reliability of the aging test result.

[0044] In the traditional test, when data abnormality occurs, the device under test needs to be manually checked one by one, which is extremely low in efficiency and prone to errors. The method provided in the embodiment can directly lock the specific physical position of the abnormal device under test through the physical address in the test data based on the correspondence between the physical address and the physical position after detecting the abnormal test data, without the need of manually searching one by one, thereby greatly shortening the abnormality checking time and significantly improving the overall process efficiency of the aging test.

[0045] In an optional implementation, before determining the abnormal device under test and the physical position corresponding to the abnormal device under test, the aging test method of the photovoltaic power electronic equipment further includes: determining the correspondence between the physical position and the physical address of each device under test.

[0046] The determination of the correspondence between the physical position and the physical address of each device under test specifically includes the following Sa1 to Sa5.

[0047] Sa1: Obtain the physical position of each device under test.

[0048] In the embodiment of the present application, the obtaining, by the Sa1, of the physical position of each device under test comprises determining the physical position of each device under test based on a construction topology. The construction topology comprises the installation position of each device under test in a physical space. The physical position of the device under test refers to the actual installation coordinates of the photovoltaic breaker in the aging test system. As an example, the physical position can be specific longitude and latitude coordinates, can be a device number, the device number can include letters or numbers, or a combination of letters and numbers, the number can be a single number or can include two numbers, the two numbers can be a string number and an in-string sequence number, the physical position can also be a combination of longitude and latitude coordinates and a device number, which is not limited herein. The device number such as [1, 3] indicates the 3rd in the string 1. As an example, the string number can be obtained based on the construction topology by numbering the photovoltaic strings from left to right, and the in-string sequence number can be obtained by numbering each device under test in series from the positive electrode to the negative electrode for each photovoltaic string. When the device number is a single number, the single number device number can be obtained by numbering each device under test from left to right and in series from the positive electrode to the negative electrode based on the construction topology, such as 1, 2, 3. The physical position is a spatial identifier matched with the physical address subsequently.

[0049] The method provided in the embodiment determines the installation position of each device under test in a physical space based on the construction topology, which is a direct basis for the physical position of the device under test. The physical position is obtained based on the construction topology, which avoids the position deviation caused by manual on-site measurement or estimation, and ensures the accuracy of the physical position. The construction topology is determined during the installation of the device, and it is not necessary to additionally invest manpower and resources to measure the position of the device during the aging test stage. Only the position information in the structure needs to be directly called, which greatly simplifies the obtaining process of the physical position.

[0050] As an example, if the construction topology is a hardware installation layout of 4 strings x 12 breakers in series as shown in Figure 2 During the installation of the breakers, 48 breakers are fixed at the specified positions of the aging rack according to the design scheme, the aging rack is divided into 4 independent areas (corresponding to 4 photovoltaic strings), each area has 12 fixed installation slots (corresponding to the 1-12th positions in the string), and the installation personnel fix the breakers in the order of string 1 slot 1→ string 1 slot 2→…→ string 4 slot 12. During the aging test stage, the physical position of the breaker in each installation slot can be determined by directly reading the string number and the in-string sequence number corresponding to each installation slot from the preset construction topology document without additional measurement.

[0051] The Sa2 broadcasts a positioning packet to each device under test.

[0052] In the embodiment of the present application, the positioning packet is generated by the central coordinator to trigger the communication of the measured device and record the response data of the propagation data. The positioning packet can contain the central coordinator identifier, the communication frequency band and the communication hop count. The communication frequency band can be 100 kHz-150 kHz, which is consistent with the networking signal, ensuring that the measured device PLC chip can receive it. The communication hop count, with an initial value of 5, controls the number of times the positioning packet is forwarded to avoid unlimited propagation of the positioning packet.

[0053] Broadcast transmission means that the central coordinator modulates the positioning packet on all group strings of cables through the magnetic ring, ensuring that the measured device can receive the positioning packet, rather than sending it to only a single measured device, which is the basis for realizing batch positioning.

[0054] The central coordinator has a PLC signal generator, which modulates the positioning packet (containing the communication hop count and the central coordinator identifier) into a 100 kHz-150 kHz power line carrier signal. Since the negative cables of the four group strings all pass through the magnetic ring of the central coordinator, the signal can be coupled to all cables through the magnetic ring and propagated along the cables to each measured device. The initial communication hop count (such as 5) is written in the header of the positioning packet, and the forwarding logic is preset: after the measured device receives the positioning packet, it first parses the communication hop count: if the communication hop count > 0, the communication hop count is reduced by 1 and the positioning packet is re-forwarded. If the communication hop count = 0, stop forwarding to avoid redundant signal propagation. In the PLC communication mode, the measured device can forward the positioning packet to the measured devices before and after it after receiving the positioning packet. For example, as shown in the figure, the central coordinator can send the positioning packet to the measured device 1, the measured device 2, the measured device 13, the measured device 14, the measured device 25, the measured device 26, the measured device 37, and the measured device 38. Figure 2 As shown in the construction topology, the central coordinator can send the positioning packet to the measured device 1, the measured device 2, the measured device 13, the measured device 14, the measured device 25, the measured device 26, the measured device 37, and the measured device 38. The central coordinator -> the measured device 1, which can forward the positioning packet to the surrounding measured devices, such as the measured device 2 and the measured device 3. The central coordinator -> the measured device 2, which can forward the positioning packet to the surrounding measured devices, such as the measured device 1 and the measured device 3.

[0055] This embodiment adopts a broadcast mode to ensure that all measured devices can trigger a response without sending messages one by one, greatly improving the positioning efficiency. By limiting the number of times the positioning packet is forwarded through the communication hop count (such as an initial hop count of 5 corresponding to a maximum of 5 levels of forwarding), the signal is prevented from being excessively crosstalked between group strings, while reducing the generation of invalid data and reducing the subsequent data processing pressure of the central coordinator.

[0056] Sa3: Obtain the response data returned by each measured device based on the positioning packet.

[0057] In the embodiment of the present application, the response data includes the physical address of the receiving party, the physical address of the sending party, and the attenuation corresponding to the positioning packet. Wherein, the measured device forwards the positioning packet after receiving the positioning packet. The central coordinator obtains the response data returned by each measured device based on the positioning packet. When the sending party is the central coordinator, the physical address of the sending party is specifically the identifier of the central coordinator. The identifier of the central coordinator can be represented by letters, numbers, etc.

[0058] In the embodiment of the present application, each measured device feeds back response data, including the physical address of the receiving party, the physical address of the sending party, and the attenuation corresponding to the positioning packet, after receiving the positioning packet. Wherein, the attenuation is calculated by the PLC chip in real time according to the change of signal strength, such as the attenuation between adjacent devices is about 6-8dB.

[0059] The measured device packs the generated response data into a feedback packet through PLC communication and returns it to the central coordinator. The central coordinator sets a data receiving buffer area and can store all response data according to the receiving time and physical address.

[0060] Sa4: Obtain the target physical address of the target measured device.

[0061] In the embodiment of the present application, the target measured device is a measured device that directly receives the positioning packet and does not obtain the positioning packet through other measured devices. The target measured device is a measured device with a known physical address, and the target physical address is the physical address of the target measured device. The target measured device specifically refers to a measured device directly connected to the central coordinator in the construction topology, i.e., a measured device corresponding to the positive terminal of each photovoltaic string, and the target measured device serves as an anchor point. As shown in the figure, the target physical address is the physical address of the measured device 1, the measured device 13, the measured device 25, and the measured device 37, such as Mac1, Mac13, Mac25, and Mac37. Figure 2

[0062] Sa5: Determine the correspondence between the physical position and the physical address of each measured device according to the target physical address of the target measured device, the physical position of each measured device, and the response data.

[0063] The method provided in the embodiment broadcasts a positioning packet to the measured device, so that the measured device automatically forwards and feeds back the physical address of the receiving party and the sending party and the attenuation after receiving the packet. The communication association information between the measured devices can be obtained without manual intervention. In combination with the physical address of the target measured device as an anchor point, the distance relationship between the measured devices is determined by the attenuation, so that the automatic and contactless mapping of the physical address and the physical position is realized. The mapping efficiency is greatly improved, the stability of the correspondence between the physical address and the physical position is ensured, and a reliable foundation is provided for subsequent positioning of abnormal measured devices.​

[0064] In an optional embodiment, Sa5 determines the correspondence between the physical location and the physical address of each DUT according to the target physical address of the target DUT, the physical location of each DUT, and the response data, comprising: The following determination step is repeatedly performed until the correspondence between the physical location and the physical address of all DUTs is determined.

[0065] Sb1: filtering the attenuation amount corresponding to the physical address targeted this time from the response data to obtain the attenuation amount targeted this time.

[0066] Wherein, the physical address targeted the first time is the target physical address as the receiver, and the sender is the sending end, and the physical address targeted each time thereafter is the physical address of the receiver, and the sender is the physical address targeted the last time. The physical address targeted this time does not include the physical address of the DUT whose correspondence has been determined. The sending end is used to generate the positioning packet. The sending end is the central coordinator.

[0067] For example, the central coordinator identification bit is denoted as W, and the response data corresponding to the target physical address as the receiver is [K, Mac, Q], specifically: [W, Mac1, Q1], [W, Mac13, Q13], [W, Mac25, Q25], [W, Mac37, Q37], K represents the physical address of the sender, Mac represents the physical address of the receiver, and Q represents the attenuation amount. The attenuation amount targeted this time is Q1, Q13, Q25, and Q37.

[0068] Sb2: determining the correspondence between the physical location and the physical address of the DUT targeted this time according to the size relationship between the attenuation amount targeted this time.

[0069] Wherein, the DUT targeted the first time is the target DUT, and the DUT targeted each time thereafter is the DUT closest to the DUT targeted the last time, and the DUT targeted this time does not include the DUT whose correspondence has been determined.

[0070] In the embodiments of the present application, the DUT targeted the last time forwards the positioning packet to a plurality of adjacent DUTs, and among the plurality of adjacent DUTs, except for the DUT whose correspondence has been determined, the DUT with the smallest attenuation amount is the DUT targeted this time. The distance between the receiver and the sender can be represented by the cable length between the receiver and the sender.

[0071] In a batch test scene, the number of devices under test is large, and the distribution of groups is complex. Directly analyzing the response data of all devices under test may cause link confusion. The method provided in the embodiment adopts a repeated iterative determination step, first takes the physical address of the target device under test as the core, and then takes the physical address determined in the last iteration as the reference, gradually expands the mapping range, and excludes the devices under test that have been determined to have a corresponding relationship, thereby avoiding data cross interference. The initial mapping is established through the target device under test, and then each target device under test is matched with the adjacent device under test, and the mapping of all devices under test is gradually completed, thereby decomposing the complex overall problem into a simple step-by-step problem and reducing the complexity of data processing.

[0072] The method provided in the embodiment clearly defines the physical address targeted each time (the target physical address in the first time, and the physical address targeted in the last time), and limits the devices under test targeted this time to not include the devices under test that have been determined to have a corresponding relationship, thereby forming an orderly mapping process. This step-by-step advancing logic avoids repeated matching or missed matching problems, ensures that the physical address of each device under test can be accurately corresponded to a unique physical location, and is especially suitable for test scenes with group string installation and dense device arrangement, thereby making the mapping process more logical and traceable.

[0073] In addition, the step-by-step determination logic can determine the corresponding relationship of part of the devices under test after each iteration without waiting for the response data of all devices under test to be completely collected for analysis, thereby advancing the mapping process in parallel. This reduces the waiting time of the overall mapping, shortens the preparation phase of the aging test, and improves the efficiency of the entire test flow.

[0074] In an optional implementation, when the attenuation amount targeted this time is the attenuation amount targeted in the first time, Sb2 determines the corresponding relationship between the physical location and the physical address of the device under test targeted this time according to the size relationship between the attenuation amounts targeted this time, including: Sc1: According to the physical location of the target device under test, the target device under test is sorted in descending order of the distance from the sending end. The physical location of the target device under test is one-to-one corresponded to the physical location of the target device under test sorted in descending order of the attenuation amount, thereby obtaining the corresponding relationship between the physical location and the physical address of the target device under test.

[0075] For example, the target device under test is device under test 1, device under test 13, device under test 25, and device under test 37. The sequence obtained by sorting the target device under test in descending order of the distance from the sending end is device under test 37, device under test 25, device under test 13, and device under test 1. The distance between the target device under test and the sending end can be represented by the attenuation amount, and the distance and the attenuation amount are positively correlated. The farther the distance, the greater the attenuation amount.

[0076] The first targeted attenuation amounts are Q1, Q13, Q25, and Q37, and the sequence obtained by ordering the attenuation amounts from large to small is: Q37, Q25, Q13, and Q1.

[0077] The first targeted physical addresses are corresponded one by one with the ordered physical positions of the target DUTs according to the order from large to small of the attenuation amounts, that is, the physical addresses Mac37, Mac25, Mac13, and Mac1 are corresponded one by one with the physical positions of the DUT 37, the DUT 25, the DUT 13, and the DUT 1. The physical position corresponding to the physical address Mac37 of the DUT 37 is [4, 1], the physical position corresponding to the physical address Mac25 of the DUT 25 is [3, 1], the physical position corresponding to the physical address Mac13 of the DUT 13 is [2, 1], and the physical position corresponding to the physical address Mac1 of the DUT 1 is [1, 1].

[0078] The method provided in this embodiment is that the target DUT is a device directly receiving the positioning packet of the sending end, the distances of the target DUTs from the sending end are different, and the corresponding attenuation amounts also have differences. According to the physical positions of the target DUTs, this embodiment orders the distances from the sending end from far to near, and orders the first targeted physical addresses from large to small according to the attenuation amounts, and establishes a one-to-one correspondence relationship through the physical law that the farther the distance, the greater the attenuation amount, so as to quickly complete the mapping between the physical addresses and the physical positions of the target DUTs. Without complex link analysis, the positioning of the target DUTs can be realized only through simple ordering and matching, and the efficiency of the initial mapping is greatly improved.

[0079] Ensure the accuracy of group string differentiation: In the multi-group string test scene, the distances of the target DUTs of different groups from the sending end are different, and the corresponding attenuation amounts also present obvious stratification. For example, in the anchor point devices of 4 groups, the anchor point closest to the central coordinator has the smallest attenuation amount, and the anchor point farthest from the central coordinator has the largest attenuation amount. Through the matching of the ordering of the attenuation amounts and the ordering of the physical positions, the target DUTs of different groups can be clearly differentiated, and mapping errors caused by group string confusion are avoided. This logic lays a foundation for the mapping of the internal devices of each group, and ensures the accuracy of the overall mapping result.

[0080] In an optional implementation, when the attenuation amount targeted this time is the attenuation amount targeted each time, Sb2 determines the correspondence between the physical position and the physical address of the DUT targeted this time according to the size relationship between the attenuation amounts targeted this time, and the method comprises the following steps of: Sd1: Determine the physical address of the receiver corresponding to the minimum attenuation among the attenuation values ​​targeted this time, establish the correspondence between the physical address of the receiver corresponding to the minimum attenuation value and the physical location of the device under test targeted this time, thereby obtaining the correspondence between the physical location and physical address of the device under test targeted this time.

[0081] like Figure 3 The forwarding relationships shown are as follows: Second time: After receiving the location message, Device 1 forwards the location message to Device 2, Device 3, and Device 4. Third time: After receiving the location message, Device 2 forwards the location message to Device 1, Device 3, and Device 4.

[0082] Second test: Among devices under test 2, 3, and 4, the device under test closest to device under test 1 is device under test 2. The device under test targeted in the second test is device under test 2, with a physical location of [1, 2]. The attenuation values ​​targeted in the second test are Q2, Q3, and Q4. Q2 is the minimum attenuation value. The physical address of the receiver corresponding to Q2 is MAC4. A correspondence is established between physical address MAC4 and [1, 2] to obtain the correspondence between the physical location and physical address of device under test 2.

[0083] Third time: Device 1 in the photovoltaic string is a device whose correspondence has been previously determined. Therefore, Device 1 is excluded. Among Devices 3 and 4, Device 3 is the closest to Device 2. The device targeted in the third time is Device 3, with a physical location of [1, 3]. In the attenuation amount targeted in the third time, Q3 is the minimum attenuation amount. The physical address of the receiver corresponding to Q3 is MAC5. The correspondence between physical address MAC5 and [1, 3] is established to obtain the correspondence between the physical location and physical address of Device 3.

[0084] In this embodiment, the photovoltaic strings are far apart. Within a single photovoltaic string, the attenuation between any two adjacent devices under test is approximately the same. The greater the distance between the receiver and the sender, the greater the attenuation. When a device under test forwards a location message, it forwards the location message to the device under test within its photovoltaic string. Taking each target device under test as the previous target device under test, the process described in Sd1 is repeated (for each target device under test / anchor point) to determine the correspondence between the physical location and physical address of the device under test in each photovoltaic string.

[0085] The method provided in the embodiment is used in a string installation scene, in which the cable length between adjacent devices under test is consistent, the signal attenuation amount is relatively fixed, and the attenuation amount between adjacent devices under test is much smaller than that between non-adjacent devices under test. The minimum attenuation amount is screened out in the present test, and the physical address of the receiving party corresponding to the minimum attenuation amount is determined as the adjacent device under test of the device under test in the last test, that is, the device under test in the present test. Therefore, the mapping between the physical address and the physical position of all devices under test in the string is gradually constructed in the order of the target device under test→adjacent device→next adjacent device, and the accuracy of the constructed corresponding relationship is improved.

[0086] In an optional embodiment, before determining the corresponding relationship between the physical position and the physical address of each device under test according to the target physical address of the target device under test, the physical position of each device under test, and the response data, the aging test method of the photovoltaic power electronic device further comprises: determining the corresponding physical address of each device under test according to the corresponding response data of each device under test, or sending a networking signal to each device under test to obtain the physical address returned by each device under test based on the networking signal, so as to obtain the corresponding physical address of each device under test.

[0087] The method provided in the embodiment provides multiple ways to obtain the corresponding physical address of each device under test. In one way, the physical address is directly extracted through the response data. The physical address carried by the device under test in the positioning message forwarding process is used, and the physical address can be extracted synchronously when the response data is obtained, without the need to send an additional networking signal, thereby improving the process coherence. In another way, the physical address is obtained through a special networking signal. The networking signal is sent to each device under test, and the physical address returned by each device under test based on the networking signal is obtained, so as to comprehensively collect the physical address.

[0088] In a scene in which the number of devices under test is large and the communication link is complex, some devices under test may not timely forward the positioning message due to signal delay or interference. At this time, the address of all devices under test can be forcibly reported through the networking signal. In a scene in which the communication state of the device is good and the response data is complete, the address can be directly extracted from the response data, thereby simplifying the process. This flexible acquisition method can adapt to the test requirements in different communication environments, thereby enhancing the robustness of the method.

[0089] The application provides a construction topology, which comprises: a plurality of photovoltaic strings and a central coordinator.

[0090] Each photovoltaic string comprises a plurality of devices under test connected in series, and the lengths of the connection lines between each two adjacent devices under test are the same. Each device under test is configured with an independent power supply. The power supply can be a direct-current power supply.

[0091] The positive terminal of each photovoltaic string is connected with the central coordinator, and the communication between the measured devices and the central coordinator is carried out through the power line carrier communication mode.

[0092] As Figure 2 shown in the construction topology aging rack, there are 4 strings, each string has 12 measured devices, and the measured devices are specifically disconnectors. The field power station environment is simulated, and the negative cable of each photovoltaic string is connected with the central coordinator (PLC collection host) through a magnetic ring.

[0093] When the aging test is carried out based on the construction topology, after the aging test starts, the central coordinator issues a test signal (test command) to collect the test data of all the maximum 48 disconnectors every preset time (such as 1 minute). All the test data have a normal threshold range limit, and if it is exceeded, it is considered that the disconnector is abnormal and needs to be replaced with a new disconnector for continuous testing.

[0094] The application also realizes device positioning through the PLC communication function of the measured devices (disconnectors), and when the data of the disconnectors are abnormal during the test, it is not necessary to search one by one, and the abnormal measured device can be directly positioned.

[0095] The measured devices are required to be provided with PLC chips. The output line length of the measured devices also needs to be strictly controlled to be consistent (as long as the measured devices are of the same model, the output line length must be the same). The measured devices are connected in series to form photovoltaic strings.

[0096] The cable length between any two adjacent measured devices is the same, that is Figure 2 the length of the connection line between the negative terminal of the measured device and the positive terminal of the next measured device is the same.

[0097] The cable length between the measured device 1- and the measured device 2+, between the measured device 2- and the measured device 3+, between the measured device 3- and the measured device 4+, …, between the measured device 11- and the measured device 12+ is the same. Since the measured device 12- and the measured device 1+ need to pass through the magnetic ring, an extension line needs to be added, and the length is relatively long.

[0098] As long as the models of the measured devices are the same, the lengths of the connection devices between the adjacent measured devices in the string 1 and the string 2 are the same. Even if they are not the same, it is theoretically possible.

[0099] The signal of the PLC communication is propagated along the wire, and the central coordinator modulates the communication signal on the cable through the magnetic ring and propagates it to the measured device along the cable. The central coordinator can also receive the signal sent by the measured device through the magnetic ring. Since the cable of each string passes through the magnetic ring, in this embodiment, 4 cables pass through the magnetic ring, so the central coordinator can realize communication with any measured device.

[0100] The communication between the measured devices and the measured devices can only be realized within the group string, i.e. the measured devices 1~measured devices 12 can communicate, and the measured devices 13~measured devices 24 can communicate.

[0101] After the installation of the measured devices based on the construction topology, the aging test is performed, all the measured devices are powered on, and the central coordinator first performs the networking communication. That is, the central coordinator broadcasts the PLC networking signal in the frequency band of 100kHz-150kHz, and all the measured devices receiving the networking signal report their own Mac addresses.

[0102] The central coordinator reads the Mac addresses (Mac0, Mac1, Mac2, …, Mac47) of the 48 measured devices. Then through the following steps, the Mac addresses of the measured devices are one-to-one corresponding to the actual physical positions of the measured devices.

[0103] The central coordinator and the measured devices, and the measured devices and the measured devices can communicate through the PLC mode, and the following three parameters can be obtained in the communication process: channel quality, signal attenuation, and average signal-to-noise ratio. Based on the three parameters, the communication quality (attenuation amount) between the central coordinator and the measured devices, or between the measured devices and the measured devices is quantified. The better the communication quality (the smaller the attenuation amount), the closer the distance between the central coordinator (the sending end) and the measured devices (the receiving end). Based on this law, the connection relationship between each device can be determined. The distance between the measured device 1 and the measured device 3 and the distance between the measured device 2 and the measured device 4 are regarded as the same distance.

[0104] In each group string, the Mac of the measured device connected to the positive electrode of each group string is recorded as an anchor point by manual recording, the central coordinator broadcasts a positioning message, and the PLC signal in the frequency band of 100k-150k is sent to the nearby measured devices for communication.

[0105] After each measured device receives it, it will be forwarded, and after recording the attenuation amount of the positioning message between the measured devices and the measured devices (assuming that the attenuation amount between the adjacent measured devices is 6-8dm), it will be sent to the central coordinator.

[0106] After receiving it, the central coordinator compares the attenuation amount of the anchor point with other measured devices, the attenuation amount of the anchor point and the only adjacent measured device is the smallest, and the farther the measured device, the larger the attenuation amount. Through the basically consistent attenuation amount between the adjacent measured devices, the anchor point position of each group string is relatively far away, and the photovoltaic group string can be distinguished.

[0107] In this way, the anchor point and the adjacent measured device are found, and by analogy, the corresponding relationship between the physical address and the physical position of the whole string of measured devices corresponding to the anchor point is found.

[0108] The central coordinator will initiate three positioning messages, and if the difference between the response data returned by the three is not large, it will end. Otherwise, if the difference between the response data returned by the three is large, it will resend the positioning message, and at most 6 rounds will end. The final result of each test is to take the set of response data with the smallest difference.

[0109] As an example, the first batch of measured devices that receive the positioning message is assumed to be 10, and the Mac addresses of the 10 measured devices are assumed to be Mac0~Mac9. Why will there be 10 measured devices receiving it? Because the PLC signal propagates along the line and will not be completely intercepted by the measured devices along the way, but will be attenuated. Before the signal is attenuated to 0, it will be listened to by the measured devices, such as the signal propagating from measured device 1, measured device 2 to measured device 3, which are all the first batch. At this time, only the Mac addresses of the four anchor point measured devices are determined, and the Mac addresses of the other measured devices need to be located by the present application. Assume that the four anchor point Mac addresses are: the Mac address of measured device 1 is Mac0, the Mac address of measured device 13 is Mac1, the Mac address of measured device 25 is Mac2, and the Mac address of measured device 37 is Mac3. Because the anchor points are closest to the central coordinator, they can definitely receive the message.

[0110] The first batch of 10 measured devices forwards the positioning message (the communication hop number is set to 4), and it is assumed that the second batch of measured devices has 20. Among the 20 measured devices of the second batch, a large part of them are also measured devices of the first batch, because PLC communication propagates along the line to both sides. For example, measured device 1 and measured device 2 are both the first batch to receive the message sent by the central coordinator, and then they will both forward and receive the message forwarded by each other in the second batch.

[0111] The second batch of measured devices records the sender Mac, receiver Mac, and attenuation (any device sending a message will carry its own Mac address, so the receiver knows the sender Mac. The attenuation is calculated according to the three parameters channel quality, signal attenuation, and average signal-to-noise ratio), and sends the response data to the central coordinator. The central coordinator summarizes and can obtain the response data as shown in Table 1. It should be noted that the central coordinator does not necessarily store such a Table 1, but it is convenient for explanation and description. Some measured devices do not have direct communication between them, so some cells in the table are empty and have no data.

[0112] Table 1 Response data table

[0113] Afterwards, the second batch of 20 measured devices retransmit the positioning packet (communication hop number is set to 3), and it is assumed that the third batch of measured devices is 25. The third batch of measured devices records the sender Mac, receiver Mac, and attenuation value and sends them to the central coordinator. The central coordinator expands the data in Table 1 above.

[0114] The third batch of 25 measured devices retransmit the positioning packet (communication hop number is set to 2), and the data in Table 1 above is expanded based on the response data.

[0115] The fourth batch of 23 measured devices retransmit the positioning packet (communication hop number is set to 1), and the data in Table 1 above is expanded based on the response data.

[0116] The fifth batch of 26 measured devices retransmit the positioning packet (communication hop number is set to 0), and the data in Table 1 above is expanded based on the response data.

[0117] At this point, a complete positioning is completed, and a complete set of response data is obtained.

[0118] Then the central coordinator sorts the data according to the data. It is known that the Mac address of the measured device 1 is Mac0, and the data in the first row of Table 1 is sorted to find the attenuation value between the receiver Mac address and Mac0. For example, Mac0 and Mac5 are the smallest, and it is considered that the Mac address of the measured device 2 is Mac5. The data in the sixth row of Table 1 (the row with Mac5 as the sender) is sorted to find the receiver Mac address with the smallest attenuation value with Mac5 (Mac0 needs to be excluded first, because Mac0 may be the smallest, but it is known that the Mac address of the measured device 1 is Mac0 before this time). The Mac address of the measured device 3 is determined, and the physical position of the measured device 3 is known, so the correspondence between the Mac address and the physical position of the measured device 3 can be determined. In turn, the Mac addresses of the measured devices 1~12 in the first string of photovoltaic strings can be determined.

[0119] Then it is known that the Mac address of the measured device 13 is Mac1, and the Mac addresses of the measured devices 13~24 in the second string of photovoltaic strings are determined in turn.

[0120] Then it is known that the Mac address of the measured device 25 is Mac2, and the Mac addresses of the measured devices 25~36 in the third string of photovoltaic strings are determined in turn.

[0121] Then it is known that the Mac address of the measured device 37 is Mac3, and the Mac addresses of the measured devices 37~48 in the fourth string of photovoltaic strings are determined in turn.

[0122] At this point, the correspondence between the physical address and the physical position of all measured devices is completed.

[0123] Figure 4 Fig. 1 shows a schematic diagram of an electronic device according to an embodiment of the application.

[0124] Reference will now be made in detail to Figure 4 Fig. 1 shows a schematic diagram of an electronic device according to an embodiment of the application. The electronic device can include a processor (e.g., a central processing unit, a graphics processing unit, etc.) 301 that can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 302 or loaded from a memory 308 into a random access memory (RAM) 303. Various programs and data required for operation of the electronic device are also stored in the RAM 303. The processor 301, the ROM 302, and the RAM 303 are connected to each other through a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0125] Generally, the following devices can be connected to the I / O interface 305: an input device 306 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc. An output device 307 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc. A memory 308 including, for example, a magnetic tape, a hard disk, etc. And a communication device 309. The communication device 309 can allow the electronic device to communicate wirelessly or by wire with other devices to exchange data. Although Figure 4 The electronic device is shown with various devices, but it should be understood that all of the shown devices are not required, and more or less devices can alternatively be implemented.

[0126] In particular, the processes described above with reference to the flowcharts can be implemented as a computer software program according to embodiments of the application. For example, embodiments of the application include a computer program product comprising a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the methods illustrated by the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via the communication device 309, or installed from the memory 308, or installed from the ROM 302. When the computer program is executed by the processor 301, the above-described functions defined in the aging test method of the photovoltaic power electronic device according to embodiments of the application are performed.

[0127] Figure 4 The electronic device shown is merely an example and should not impose any limitations on the functions and the range of use of embodiments of the application.

[0128] The embodiments of the present application further provide a computer readable storage medium, and the method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or be implemented as computer code originally stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded through a network and stored in a local storage medium, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, etc. Further, the storage medium can also include a combination of the above-mentioned types of memories. It can be understood that the computer, the processor, the microprocessor controller, or the programmable hardware includes a storage component that can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the aging test method of the photovoltaic power electronic device shown in the above embodiments is implemented.

[0129] Part of the present application can be applied as a computer program product, for example, computer program instructions, when executed by a computer, through the operation of the computer, the method and / or technical solutions according to the present application can be invoked or provided. Those skilled in the art should understand that the form of computer program instructions in a computer readable medium includes but is not limited to source files, executable files, installation package files, etc. Correspondingly, the way of computer program instructions executed by a computer includes but is not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Here, the computer readable medium can be any available computer readable storage medium or communication medium accessible to the computer.

[0130] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A method of aging testing a photovoltaic power electronics device, characterized by, The method comprises: sending a test signal to each of the devices under test; receiving test data returned by each of the devices under test based on the test signal; the test data comprising a physical address of the device under test; determining whether the test data corresponding to each of the devices under test is abnormal; when it is determined that the test data is abnormal, determining the physical location and the physical address corresponding to the abnormal device under test according to a correspondence between the test data and the physical location and the physical address of each of the devices under test; the abnormal device under test being the device under test corresponding to the test data that is abnormal.

2. The method of claim 1, wherein, Before determining the abnormal device under test and the physical location corresponding to the abnormal device under test, the method further comprises: obtaining the physical location of each of the devices under test; broadcasting a positioning message to each of the devices under test; obtaining response data returned by each of the devices under test based on the positioning message; the response data comprising a physical address of a receiver, a physical address of a sender and an attenuation amount corresponding to the positioning message; wherein the device under test forwards the positioning message after receiving the positioning message; obtaining a target physical address of a target device under test; the target device under test being a device under test that directly receives the positioning message and does not obtain the positioning message by forwarding the positioning message through another device under test; determining the correspondence between the physical location and the physical address of each of the devices under test according to the target physical address of the target device under test, the physical location of each of the devices under test and the response data.

3. The method of claim 2, wherein, The determination of the correspondence between the physical location and the physical address of each of the devices under test according to the target physical address of the target device under test, the physical location of each of the devices under test and the response data comprises: repeatedly performing the following determination steps until the correspondence between the physical location and the physical address of all of the devices under test is determined; screening the attenuation amount corresponding to the physical address targeted this time from the response data to obtain the attenuation amount targeted this time; wherein the physical address targeted the first time is the target physical address as the receiver and the sender, and the physical address targeted each of the other times is the physical address of the receiver and the sender is the physical address targeted the last time; the physical address targeted this time does not include the physical address of the device under test for which the correspondence has been determined; and the sender is configured to generate the positioning message; determining the correspondence between the physical location and the physical address of the device under test targeted this time according to the size relationship between the attenuation amount targeted this time; wherein the device under test targeted the first time is the target device under test, and the device under test targeted each of the other times is the device under test closest to the device under test targeted the last time; the device under test targeted this time does not include the device under test for which the correspondence has been determined.

4. The method of claim 3, wherein, When the attenuation amount targeted this time is the attenuation amount targeted the first time, the determination of the correspondence between the physical location and the physical address of the device under test targeted this time according to the size relationship between the attenuation amount targeted this time comprises: According to the physical positions of the target devices under test, the target devices under test are sorted in descending order of distance from the sending end; and the physical addresses of the first time are corresponded to the sorted physical positions of the target devices under test in descending order of attenuation amount, so as to obtain the correspondence between the physical positions and the physical addresses of the target devices under test.

5. The method of claim 3, wherein, When the attenuation amount of the current time is the attenuation amount of each time, the correspondence between the physical position and the physical address of the device under test of the current time is determined according to the size relationship between the attenuation amounts of the current time, including: The physical address of the receiver corresponding to the minimum attenuation amount in the attenuation amount of the current time is determined, and the correspondence between the physical address of the receiver corresponding to the minimum attenuation amount and the physical position of the device under test of the current time is established, so as to obtain the correspondence between the physical position and the physical address of the device under test of the current time.

6. The method of claim 2, wherein, Before the correspondence between the physical position and the physical address of each device under test is determined according to the target physical address of the target device under test, the physical position of each device under test and the response data, the method further includes: The physical address corresponding to each device under test is determined according to the response data corresponding to each device under test, or a networking signal is sent to each device under test to obtain the physical address returned by each device under test based on the networking signal, so as to obtain the physical address corresponding to each device under test.

7. The method of claim 2, wherein, The physical position of each device under test is obtained, including: The physical position of each device under test is determined based on the construction topology; the construction topology includes the installation position of each device under test in the physical space.

8. A construction topology, characterized by The construction topology includes: A plurality of photovoltaic strings and a central coordinator; Each photovoltaic string includes a plurality of devices under test connected in series, and the length of the connection line between each adjacent two devices under test is the same; each device under test is configured with an independent power supply; The positive terminal of each photovoltaic string is connected with the central coordinator, and the devices under test and the central coordinator communicate through power line carrier communication mode.

9. An electronic device, comprising: Including: A memory and a processor, which are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, which are used to make the computer execute the method of any one of claims 1 to 7.

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