Photovoltaic inverter with fault self-diagnosis function

Abstract

The utility model relates to a photovoltaic inverter with a fault self-diagnosis function, and belongs to the technical field of inverters, the photovoltaic inverter comprises an installation box and an inversion device built in one side wall of the installation box, the installation box is internally provided with a data acquisition sensor located at an empty space outside the inversion device, and the data acquisition sensor is connected with the inversion device. A memory for storing sensor data is arranged in the mounting box, and a capacity expansion box for expanding the capacity of the mounting box is arranged on one side of the mounting box. According to the photovoltaic inverter with the fault self-diagnosis function, the capacity expansion box and the installation box are connected in a sliding mode, so that the inverter box body has the capacity expansion capacity, sensing components are further conveniently installed in the inverter to be connected with a system interface, and real-time monitoring and diagnosis of the operation state of the inverter are achieved through the arrangement of a plurality of sensors; faults can be found in time, the accuracy and reliability of fault diagnosis are improved, and the maintenance cost and shutdown loss are reduced.

Description

Technical Field

[0001] This application relates to the technical field of inverters, and specifically to a photovoltaic inverter with a fault self-diagnosis function. Background Technique

[0002] An inverter is an electronic device used to convert direct current into alternating current. Inverters are widely used in fields such as solar power generation systems, wind power generation systems, electric vehicles, and UPS systems. In a solar power generation system, the direct current generated by solar panels needs to be converted into alternating current by an inverter in order to supply power to household or industrial equipment.

[0003] A photovoltaic inverter is one of the core devices of a photovoltaic power generation system, and its normal operation is crucial for the stability and power generation efficiency of the system. Fault diagnosis can achieve early identification of faults through the analysis of inverter operation data, thereby improving the reliability and operation efficiency of the system. As an outdoor component, the diagnosis of a photovoltaic inverter needs to be completed through the system. Currently, it is uniformly achieved by installing sensing components such as sensors on the photovoltaic inverter to obtain inverter information. However, due to the limited storage space of the photovoltaic inverter system, it is difficult to spare enough space to separately replace the photovoltaic inverter box to set up self-diagnosis components. Therefore, a photovoltaic inverter with a fault self-diagnosis function is proposed to solve the above problems. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, this application provides a photovoltaic inverter with a fault self-diagnosis function, which has the advantages of flexibly adjusting the photovoltaic inverter box to facilitate the installation of different module piston memories for self-diagnosis, etc.

[0005] To achieve the above object, this application provides the following technical solution: A photovoltaic inverter with a fault self-diagnosis function, including an installation box and an inverter device built in one side wall of the installation box. A data acquisition sensor is installed in the installation box at the empty space outside the inverter device, and a memory for storing sensor data is provided in the installation box;

[0006] One side of the installation box is provided with an expansion box for expanding the installation box.

[0007] Further, a cover is fixedly installed on one side surface of the expansion box.

[0008] Further, an installation rack extending into the expansion box is also provided on one side surface of the inverter device, and the memory is located between the installation racks.

[0009] Further, a positioning rod is fixedly installed on one side of the cover facing the installation box. One side of the installation box is open, and a positioning hole corresponding to the positioning rod is provided at the opening.

[0010] Further, a counterbore is penetrated through the positioning rod. A sliding frame is fixedly installed at the opening of the installation box, and a perforation for a screw to pass through is penetrated through the upper end of the sliding frame.

[0011] Further, a heat dissipation hole is penetrated through the middle of the installation frame. A positioning frame for positioning the memory is fixedly installed at the bottom of the installation frame. A positioning strip is integrally extended on one side surface of the installation frame, and a card slot is provided on the other side surface of the installation frame.

[0012] Further, a wire splitter is also connected to the side surface of the installation box.

[0013] Further, the cross sections of the positioning strip and the card slot are both T-shaped.

[0014] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0015] For the photovoltaic inverter with a fault self-diagnosis function, by setting the expansion box and the installation box to be slidably connected, the inverter box body has the expansion ability, which further facilitates the installation of sensing components in the inverter and connection with the system interface. By setting a plurality of sensors, the real-time monitoring and diagnosis of the operation state of the inverter are realized, faults are discovered in time, the accuracy and reliability of fault diagnosis are improved, and the maintenance cost and downtime loss are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present application;

[0017] Figure 2 is the three-dimensional structural diagram of the expansion box of the present application;

[0018] Figure 3 is the side view of the installation box of the present application;

[0019] Figure 4 is the structural schematic diagram of the installation frame of the present application.

[0020] In the figure: 1, installation box; 2, inverter device; 3, wire splitter; 4, cover; 5, expansion box; 6, installation frame; 61, heat dissipation hole; 62, positioning frame; 63, positioning strip; 64, card slot; 7, memory; 8, positioning rod; 9, positioning hole; 10, sliding frame; 11, counterbore. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0022] Please refer to Figures 1 to 4 , a photovoltaic inverter with a fault self-diagnosis function in this embodiment includes an installation box 1 and an inverter device 2 built in one side wall of the installation box 1. A wire splitter 3 is also connected to the side of the installation box 1 for sorting out the wiring.

[0023] In this embodiment, a data acquisition sensor is installed in the installation box 1 at the vacant place outside the inverter device 2. The acquisition data of the data acquisition sensor includes parameters such as the voltage, current, temperature, and frequency of the inverter device, extracts the characteristics of the inverter operation data, and through data analysis and mining techniques, identifies the fault characteristics and trends.

[0024] Specifically, sensors suitable for photovoltaic inverters are selected, including light intensity sensors, temperature sensors, current sensors, voltage sensors, etc., for collecting real-time data of the photovoltaic cell array and the inverter; data acquisition devices are equipped, such as data acquisition modules or data collectors, for receiving and processing the data collected by the sensors and connecting to the inverter system through a communication interface.

[0025] Furthermore, a suitable database system, such as MySQL, InfluxDB, etc., is selected to store the collected real-time data and historical data; and a reasonable data storage structure is designed, including data table design, field definition, etc., for effective management and query of the data; at the same time, a regular data backup mechanism is established to ensure the security and integrity of the data, and a corresponding data recovery strategy is designed.

[0026] Supplementary description, a suitable communication protocol, such as Modbus, TCP / IP, etc., is selected for data transmission between the inverter system and the data acquisition device, to enhance the security of data transmission, and encryption technology and authentication mechanisms are adopted to prevent data from being illegally obtained and tampered with.

[0027] In this application, the data collected by the sensors in the installation box 1 is visually displayed in the form of charts, curves, etc. through the use of data visualization tools, the collected data is processed and analyzed to achieve fault diagnosis, and at the same time, a fault diagnosis model is established to identify possible faults by monitoring abnormal changes in the data and provide corresponding warnings and suggestions.

[0028] In this embodiment, various modules suitable for fault diagnosis are selected, including a data acquisition module and a fault diagnosis module, and they are integrated into the system; the interfaces and communication protocols between the systems are designed to ensure smooth data exchange and information transmission between each module.

[0029] It should be noted that a memory 7 for storing sensor data is provided in the installation box 1, and an expansion box 5 for expanding the installation box 1 is provided on one side of the installation box 1. A cover 4 is fixedly installed on one side surface of the expansion box 5. The expansion box 5 is inserted into one side of the installation box 1 and closed by the cover 4, so that the installation box 1 has the effect of being able to expand.

[0030] In this embodiment, an installation frame 6 extending into the expansion box 5 is further provided on one side surface of the inverter device 2, and the memory 7 is located between the installation frames 6.

[0031] In this embodiment, a positioning rod 8 is fixedly installed on the side surface of the cover 4 facing the installation box 1. One side of the installation box 1 is open, and a positioning hole 9 corresponding to the positioning rod 8 is provided at the opening. Through the mutual sliding connection between the positioning rod 8 and the positioning hole 9, the expansion box 5 can slide relative to the installation box 1.

[0032] It should be noted that a counterbore 11 is penetrated through the positioning rod 8, and a sliding frame 10 is fixedly installed at the opening of the installation box 1. A through hole for a screw to pass through is penetrated through the upper end of the sliding frame 10.

[0033] During the implementation process, by passing a screw through the sliding frame 10, the positioning rod 8 can be slid and locked relative to the installation box 1.

[0034] In addition, a groove for embedding the sliding frame 10 should be provided on the surface of the cover 4, so that the cover 4 can fit against the installation box 1.

[0035] In this embodiment, a heat dissipation hole 61 is penetrated through the middle of the installation frame 6 to improve the heat dissipation effect of the installation frame 6. A positioning frame 62 for positioning the memory 7 is fixedly installed at the bottom of the installation frame 6. A positioning strip 63 is integrally extended on one side surface of the installation frame 6, and a card slot 64 is provided on the other side surface of the installation frame 6.

[0036] Preferably, the cross sections of the positioning strip 63 and the card slot 64 are both T-shaped, so that after the positioning strip 63 and the card slot 64 are slid and fitted with each other, the two installation frames 6 can be spliced and positioned.

[0037] The working principle of the above embodiment is as follows:

[0038] By pulling out the cover 4 on one side of the installation box 1 together with the expansion box 5 relative to the installation box 1, an installation space is expanded inside the inverter. Then, sensing components are installed on the inverter device 2, and the adjacent mounting brackets 6 are connected by splicing in a

[0039] way of extending the connection only. Subsequently, the memory 7 is installed inside the installation box 1 and reasonably configured, and the software environment required for the deployment and configuration of the system is deployed, including database systems, operating systems, application programs, etc., to ensure that the system can operate normally. The system is subjected to functional tests to verify whether the functions of each module of the system are normal, including data acquisition and fault diagnosis functions. According to the characteristics of the problem and the nature of the data, a support vector machine learning model is selected, and the structure and parameters of the model are established, including the input layer, hidden layer, output layer, etc., and adjusted and optimized according to the data characteristics, the characteristics of the inverter operation data are extracted, and the fault characteristics are identified to complete the fault self-diagnosis.

[0040] It should be noted that in this article, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0041] Although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic inverter with a fault self-diagnosis function, comprising an installation box (1) and an inverter device (2) built into a side wall of the installation box (1), characterized in that: A data acquisition sensor located in a spare space outside the inverter device (2) is installed in the installation box (1), and a memory (7) for storing sensor data is provided in the installation box (1); An expansion box (5) for expanding the capacity of the installation box (1) is provided on one side of the installation box (1).

2. A photovoltaic inverter with fault self-diagnosis function according to claim 1, characterized in that: A sealing cover (4) is fixedly mounted on one side surface of the capacity expansion box (5).

3. The photovoltaic inverter with fault self-diagnosis function according to claim 1, characterized in that: A mounting frame (6) extending into the expansion box (5) is also provided on one side surface of the inverter device (2), and the storage device (7) is located between the mounting frames (6).

4. A photovoltaic inverter with fault self-diagnosis function according to claim 2, characterized in that: The cover (4) is fixedly mounted with a positioning rod (8) on one side surface of the installation box (1); one side of the installation box (1) is open, and a positioning hole (9) corresponding to the positioning rod (8) is provided at the opening.

5. A photovoltaic inverter with fault self-diagnosis function according to claim 4, characterized in that: The positioning rod (8) is provided with a countersunk hole (11), and a sliding frame (10) is fixedly installed at the opening of the installation box (1), and the upper end of the sliding frame (10) is provided with a through hole for screws to pass through.

6. The photovoltaic inverter with fault self-diagnosis function according to claim 3, characterized in that: A heat dissipation hole (61) is provided through the middle of the mounting frame (6), a positioning frame (62) for positioning the memory (7) is fixedly installed at the bottom of the mounting frame (6), a positioning strip (63) is integrally extended on one side surface of the mounting frame (6), and a card slot (64) is provided on the other side surface of the mounting frame (6).

7. The photovoltaic inverter with fault self-diagnosis function according to claim 1, characterized in that: A splitter (3) is also connected to the side of the installation box (1).

8. The photovoltaic inverter with fault self-diagnosis function according to claim 6, characterized in that: The cross sections of the positioning strip (63) and the clamping groove (64) are both T-shaped.

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