A Fault Diagnosis System for Solar Photovoltaic Energy Storage System

Abstract

This invention relates to the technical field of fault diagnosis systems for photovoltaic energy storage systems, specifically to a fault diagnosis system for a solar photovoltaic energy storage system. The system includes a support structure, photovoltaic modules, an angle adjustment subsystem, a power distribution system, an energy storage subsystem, a control system, and a diagnostic subsystem. The photovoltaic modules include multiple photovoltaic panels, all rotatably connected to the support structure. Multiple angle adjustment subsystems are provided, connected between the support structure and the photovoltaic panels, and used to adjust the rotation angle of the photovoltaic panels. The power distribution system connects the energy storage subsystem and all photovoltaic panels to the power grid. The diagnostic subsystem detects the photovoltaic modules and determines whether they require inspection, transmitting this information to the user end and the control system. The system's diagnostic process can dynamically adapt to environmental conditions, more accurately reflecting the actual operating status of the photovoltaic modules and avoiding false alarms or missed alarms caused by environmental changes.

Description

Technical Field

[0001] The present invention relates to the technical field of fault diagnosis systems for photovoltaic energy storage systems, and in particular to a fault diagnosis system for solar photovoltaic energy storage systems. Background Art

[0002] Solar photovoltaic energy storage systems usually consist of the following main parts:

[0003] Photovoltaic modules, which are composed of multiple spliced ​​photovoltaic panels, are responsible for converting solar radiation into direct current and are the core part of the system.

[0004] Photovoltaic inverters convert the direct current generated by photovoltaic panels into alternating current for use in homes, commercial facilities or the power grid.

[0005] Energy storage unit,The energy storage unit is used to store the excess electricity generated by the photovoltaic panels so that it can be used when there is insufficient sunlight (such as at night or on cloudy days) or when the electricity demand is peak.

[0006] Energy Management System,The energy management system is responsible for monitoring, controlling and optimizing the operation of the entire photovoltaic energy storage system, including electricity production, storage and use.

[0007] The application document with publication number CN106688176A discloses a photovoltaic power generation system with a fault diagnosis device and a fault diagnosis method thereof. The fault diagnosis device includes: a temperature sensor unit, which detects the internal temperature of the junction box and the surface temperature of the solar cell module; a voltage detection sensor, which is arranged in the junction box and detects the voltage of the power supply generated by the solar cell module; and a calculation unit, which determines whether the detection value of the temperature sensor unit is within the fault range, and whether the difference between the detection value of the voltage detection sensor and the open-circuit voltage of the solar cell module is within a specified range, thereby determining the fault location.

[0008] The diagnosis in the prior art mainly relies on the internal parameters of the photovoltaic module to judge the fault, but ignores the influence of environmental factors on the photovoltaic module, which reduces the accuracy of the judgment. Summary of the invention

[0009] The purpose of the present invention is to improve the accuracy of judgment. In view of the above-mentioned shortcomings, a fault diagnosis system for a solar photovoltaic energy storage system is proposed.

[0010] The present invention adopts the following technical solution:

[0011] A fault diagnosis system for a solar photovoltaic energy storage system, the system comprising a bracket, a photovoltaic module, an angle adjustment subsystem, a distribution subsystem, an energy storage subsystem, a control system and a diagnosis subsystem;

[0012] The photovoltaic assembly includes a plurality of photovoltaic panels, preferably more than two, and all photovoltaic panels are rotatably connected to the bracket;

[0013] The angle adjustment subsystem is provided with multiple, preferably more than two, and all angle adjustment subsystems correspond to all photovoltaic panels one by one. Taking one corresponding angle adjustment subsystem and one photovoltaic panel as an example, the angle adjustment subsystem is connected between the bracket and the photovoltaic panel, and the angle adjustment subsystem is used to adjust the rotation angle of the photovoltaic panel;

[0014] The energy storage subsystem is used to store the electrical energy generated by all photovoltaic panels;

[0015] The distribution subsystem is used to connect the energy storage subsystem and all photovoltaic panels to the power grid;

[0016] The diagnostic subsystem is used to detect environmental factors and obtain information on whether the photovoltaic components need to be inspected, and transmit the information on whether the photovoltaic components need to be inspected to the user end and the control system;

[0017] The control system locks the angle adjustment subsystem according to the information whether the photovoltaic assembly needs to be inspected.

[0018] Optionally, the angle adjustment subsystem includes a base, an eccentric wheel, a gear, a motor, a transmission assembly and a connecting rod;

[0019] The base is connected to the bracket;

[0020] The eccentric wheel is rotatably connected to the bracket;

[0021] The gear is rotatably connected to the bracket, the top of the gear is higher than the top of the eccentric wheel, and a gap is formed between the wheel surface of the gear and the wheel surface of the eccentric wheel;

[0022] The transmission assembly is rotatably connected to the bracket, the transmission assembly is transmission-connected between the eccentric wheel and the gear, one end of the transmission assembly is transmission-connected to the wheel surface of the eccentric wheel, and the other end of the transmission assembly drives the gear to rotate and limits the rotation position of the gear;

[0023] The motor is connected to the base, and the motor drives the eccentric wheel to rotate, and the rotation axis of the eccentric wheel, the rotation axis of the transmission assembly, the rotation axis of the gear and the rotation axis of the photovoltaic panel are all parallel to each other;

[0024] The two ends of the connecting rod are rotatably connected to the gear and the photovoltaic panel respectively;

[0025] The control system locks the motor according to the information whether the photovoltaic assembly needs to be inspected.

[0026] Optionally, the transmission assembly has a roller surface, a pushing end, a rotating end and a limit end, the pushing end is higher than the limit end, the limit end is higher than the rotating end, the roller surface is against the wheel surface of the eccentric wheel, the rotating end is rotatably connected to the base, the rotation axis of the rotating end is parallel to the rotation axis of the photovoltaic panel, the pushing end is adapted to the gear and drives the gear to rotate, and the limit end can be clamped on the wheel surface of the gear.

[0027] Optionally, the transmission assembly includes a transmission plate, a limit plate, a push rod and a roller;

[0028] The rotating end is located on the transmission plate;

[0029] The roller is rotatably connected to the transmission plate, the rotation axis of the roller is parallel to the rotation axis of the photovoltaic panel, and the roller surface is located on the roller;

[0030] The limit plate is connected to the transmission plate, and the limit end is located on the limit plate;

[0031] One end of the push rod is rotatably connected to the transmission plate, one end of the push rod is higher than the limit end, the other end of the push rod is the push end, the rotation axis of the push rod is parallel to the rotation axis of the photovoltaic panel, and the push end is located at the other end of the push plate.

[0032] Specifically, the eccentric wheel controls the rotation of the main gear through the connecting rod to achieve precise angle adjustment. Due to the design characteristics of the eccentric wheel, it can produce a larger angle swing through a smaller input rotation, making the angle adjustment of the photovoltaic panel more delicate and precise, and suitable for flexible adjustment of the photovoltaic panel when the sunlight direction changes.

[0033] Optionally, the diagnostic subsystem includes an environmental data monitoring module, a control module, an inspection and judgment module, and a communication module;

[0034] The environmental data monitoring module is used to monitor the environmental temperature, humidity and wind speed and obtain relevant environmental data, and transmit the relevant environmental data to the control module;

[0035] The control module obtains the photovoltaic module inspection factor according to the relevant data of the environment, and transmits the photovoltaic module inspection factor to the inspection judgment module;

[0036] The inspection judgment module obtains information on whether the photovoltaic assembly needs to be inspected based on the photovoltaic assembly inspection factor, and transmits the information on whether the photovoltaic assembly needs to be inspected to the communication module and the control system;

[0037] The communication module transmits information on whether the photovoltaic assembly needs to be inspected to the user end.

[0038] Optionally, the environmental data monitoring module includes a monitoring day setting submodule, a temperature monitoring submodule, a time analysis submodule, a humidity monitoring submodule, a wind speed monitoring submodule and an environmental data setting submodule;

[0039] The monitoring days setting submodule is used to set the total number of days for inspection and transmit it to the control module;

[0040] The temperature monitoring submodule is used to monitor and obtain the maximum value of the temperature checked every day and the minimum value of the temperature checked every day, and transmit them to the control module and the time analysis submodule;

[0041] The time analysis submodule is used to analyze and obtain the time interval between the maximum temperature difference of the air temperature checked every day, and transmit it to the control module;

[0042] The humidity monitoring submodule is used to monitor and obtain the average value of the humidity measured every day, and transmit it to the control module;

[0043] The wind speed monitoring submodule is used to monitor and obtain the maximum value of the wind speed measured every day, and transmit it to the control module;

[0044] The environmental data setting submodule is used to set a reference value of a high temperature, a reference value of a low temperature, an average value of a humidity reference and a maximum value of a wind speed reference, and transmit the values ​​to the control module;

[0045] The control module obtains a wind speed index detected every day based on the maximum value of the wind speed actually measured and the maximum value of the wind speed reference, obtains a low temperature index detected every day based on the minimum value of the air temperature detected every day and the reference value of the low temperature, obtains a high temperature index detected every day based on the maximum value of the air temperature detected every day and the reference value of the high temperature, and obtains a photovoltaic component inspection factor based on the total number of inspection days, the maximum value of the air temperature detected every day, the minimum value of the air temperature detected every day, the time interval between the maximum temperature differences detected every day, the high temperature index detected every day, the low temperature index detected every day, the average value of the humidity actually measured every day, the average value of the humidity reference and the wind speed index detected every day.

[0046] Optionally, the temperature monitoring submodule includes a temperature monitoring unit and a temperature analysis unit;

[0047] The temperature monitoring unit is used to monitor the real-time temperature;

[0048] The temperature analysis unit obtains the maximum value of the temperature checked every day and the minimum value of the temperature checked every day according to the real-time temperature analysis, and transmits them to the control module and the time analysis submodule.

[0049] Optionally, the humidity monitoring submodule includes a humidity monitoring unit and a humidity analysis unit;

[0050] The humidity monitoring unit is used to monitor the real-time humidity;

[0051] The humidity analysis unit obtains an average value of the humidity actually measured every day based on real-time humidity analysis, and transmits the value to the control module.

[0052] Optionally, the wind speed monitoring submodule includes a wind speed monitoring unit and a wind speed analysis unit;

[0053] The wind speed monitoring unit is used to monitor the real-time wind speed;

[0054] The wind speed analysis unit obtains the maximum value of the wind speed actually measured every day based on the real-time wind speed analysis, and transmits it to the control module.

[0055] Optionally, when the control module calculates the photovoltaic component inspection factor, the following formula is satisfied:

[0056]

[0057] Among them, Ee is the inspection factor of photovoltaic modules, A is the total number of inspection days, Check the maximum temperature on day a. is the minimum temperature detected on day a, t a is the time interval between checking the maximum temperature difference on day a, gw a The high temperature index is checked for day a, dw a The low temperature index is checked for day a, rh a is the average value of humidity measured on day a, rhck is the average value of humidity reference, fs a Check the wind speed index for day a.

[0058] The beneficial effects achieved by the present invention are:

[0059] 1. The system monitors the ambient temperature, humidity and wind speed in real time through the environmental data monitoring module, so that the diagnosis process can dynamically adapt to environmental conditions. This real-time environmental monitoring can more accurately reflect the actual operating status of the photovoltaic modules and avoid false alarms or missed alarms caused by environmental changes;

[0060] 2. Through analysis, possible failure risks can be identified in advance, so preventive maintenance can be recommended, which helps to deal with failures before they occur, reduce system downtime, and extend the service life of the system;

[0061] 3. Timely notifications and intuitive information feedback from the user end enhance the user experience, allowing users to understand the health status of the system without relying on professional technicians;

[0062] 4. The modular design of the system enables each module to operate independently and also to collaborate with each other. This design not only improves the system's integration, but also makes the system easy to expand and upgrade, and can adapt to future technological developments and changes.

[0063] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a partial structural schematic diagram of the present invention;

[0065] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0066] Figure 3 It is a schematic diagram of the structure of the diagnosis subsystem in the present invention;

[0067] Figure 4 It is a structural schematic diagram of the temperature monitoring submodule in the present invention;

[0068] Figure 5 It is a structural schematic diagram of the temperature monitoring submodule in the present invention;

[0069] Figure 6 It is a structural schematic diagram of the wind speed monitoring submodule in the present invention;

[0070] Figure 7 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0071] Figure 8 This is a schematic diagram of the structure of the age analysis submodule in the second embodiment of the present invention;

[0072] Fig. 9 Schematic diagram of the structure of the visual analysis submodule in the second embodiment of the present invention.

[0073] Description of reference numerals:

[0074] 100. Bracket;

[0075] 200. Photovoltaic panels;

[0076] 300, base;

[0077] 400, eccentric wheel;

[0078] 500, gear;

[0079] 600, motor;

[0080] 700, transmission assembly; 710, transmission plate; 711, rotating end; 720, limit plate; 721, limit end; 730, push rod; 731, push end; 740, roller; 741, roller surface;

[0081] 800. Connecting rod. DETAILED DESCRIPTION

[0082] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0083] The following references Figures 1 to 9 shown.

[0084] Embodiment 1: This embodiment provides a fault diagnosis system for a solar photovoltaic energy storage system.

[0085] A fault diagnosis system for a solar photovoltaic energy storage system, the system comprising a bracket 100, a photovoltaic module, an angle adjustment subsystem, a distribution subsystem, an energy storage subsystem, a control system and a diagnosis subsystem;

[0086] The photovoltaic assembly includes a plurality of photovoltaic panels 200, and all photovoltaic panels 200 are rotatably connected to the bracket 100;

[0087] The angle adjustment subsystem is provided with a plurality of angle adjustment subsystems, and all angle adjustment subsystems correspond to all photovoltaic panels 200 one by one. Taking one corresponding angle adjustment subsystem and one photovoltaic panel 200 as an example, the angle adjustment subsystem is connected between the bracket 100 and the photovoltaic panel 200, and the angle adjustment subsystem is used to adjust the rotation angle of the photovoltaic panel 200;

[0088] The energy storage subsystem is used to store the electrical energy generated by all photovoltaic panels 200;

[0089] The power distribution subsystem is used to connect the energy storage subsystem and all photovoltaic panels 200 to the power grid;

[0090] The diagnostic subsystem is used to detect environmental factors and obtain information on whether the photovoltaic components need to be inspected, and transmit the information on whether the photovoltaic components need to be inspected to the user end and the control system;

[0091] The control system locks the angle adjustment subsystem according to the information whether the photovoltaic assembly needs to be inspected.

[0092] Optionally, the angle adjustment subsystem includes a base 300, an eccentric wheel 400, a gear 500, a motor 600, a transmission assembly 700 and a connecting rod 800;

[0093] The base 300 is connected to the bracket 100;

[0094] The eccentric wheel 400 is rotatably connected to the bracket 100;

[0095] The gear 500 is rotatably connected to the bracket 100, the top of the gear 500 is higher than the top of the eccentric wheel 400, and the wheel surface of the gear 500 forms a gap with the wheel surface of the eccentric wheel 400;

[0096] The transmission assembly 700 is rotatably connected to the bracket 100, and the transmission assembly 700 is transmission-connected between the eccentric wheel 400 and the gear 500. One end of the transmission assembly 700 is transmission-connected to the wheel surface of the eccentric wheel 400, and the other end of the transmission assembly 700 drives the gear 500 to rotate and limits the rotation position of the gear 500.

[0097] The motor 600 is connected to the base 300, and the motor 600 drives the eccentric wheel 400 to rotate. The rotation axis of the eccentric wheel 400, the rotation axis of the transmission assembly 700, the rotation axis of the gear 500 and the rotation axis of the photovoltaic panel 200 are all parallel to each other.

[0098] The two ends of the connecting rod 800 are rotatably connected to the gear 500 and the photovoltaic panel 200 respectively;

[0099] The control system locks the motor 600 according to the information whether the photovoltaic assembly needs to be inspected.

[0100] Specifically, the gear 500 and the eccentric wheel 400 are located on the same vertical plane; the rotation direction of the eccentric wheel 400 is opposite to the rotation direction of the gear 500 .

[0101] Optionally, the transmission assembly 700 has a roller surface, a pushing end 731, a rotating end 711 and a limiting end 721, the pushing end 731 is higher than the limiting end 721, the limiting end 721 is higher than the rotating end 711, the roller surface is against the wheel surface of the eccentric wheel 400, the rotating end 711 is rotatably connected to the base 300, the rotation axis of the rotating end 711 is parallel to the rotation axis of the photovoltaic panel 200, the pushing end 731 is adapted to the gear 500 and drives the gear 500 to rotate, and the limiting end 721 can be snapped onto the wheel surface of the gear 500.

[0102] Optionally, the transmission assembly 700 includes a transmission plate 710, a limit plate 720, a push rod 730 and a roller 740;

[0103] The rotating end 711 is located on the transmission plate 710;

[0104] The roller 740 is rotatably connected to the transmission plate 710 , the rotation axis of the roller 740 is parallel to the rotation axis of the photovoltaic panel 200 , and the roller surface 741 is located on the roller 740 ;

[0105] The limiting plate 720 is connected to the transmission plate 710, and the limiting end 721 is located on the limiting plate 720;

[0106] One end of the push rod 730 is rotatably connected to the transmission plate 710 , one end of the push rod 730 is higher than the limit end 721 , the rotation axis of the push rod 730 is parallel to the rotation axis of the photovoltaic panel 200 , and the push end 731 is located at the other end of the push plate.

[0107] Specifically, the limit plate 720 and the wheel surface of the gear 500 are in interference fit. When the limit plate 720 is engaged with the wheel surface of the gear 500, the photovoltaic panel 200 can be better maintained at a certain rotation angle. In order to better fit the connection, a magnet can be embedded in the recessed position of the wheel surface of the gear 500, and another magnet can be externally provided on the surface of the limit plate 720 to cooperate with the magnet in the recessed position to achieve mutual attraction.

[0108] Specifically, the bottom end of the connecting rod 800 is initially located at the lowest point of the gear 500, at which time the angle between the photovoltaic panel 200 and the ground is the smallest; the eccentric wheel 400 rotates clockwise, causing the roller 740 to roll along the surface of the eccentric wheel 400, causing the transmission plate 710 to move up and down, thereby driving the transmission plate 731 to push the gear 500 to rotate counterclockwise, and gradually pushing up the bottom end of the connecting rod 800 during the process, thereby increasing the height of the photovoltaic panel 200.

[0109] The combined design of the transmission assembly 700 and the gear 500 can smoothly convert the rotation of the eccentric wheel 400 into the angle change of the photovoltaic panel 200, reducing the impact and vibration during the angle adjustment process. The photovoltaic panel 200 needs to remain stable for a long time in the working environment, so smooth transmission is very helpful to extend the life of the equipment and maintain the normal working state of the photovoltaic panel 200.

[0110] The mechanism is simple in design, has relatively few parts, and is easy to maintain. The structure of the eccentric wheel 400, the transmission assembly 700, and the gear 500 can ensure that the entire photovoltaic panel 200 adjustment system is compact, reduces space occupancy, and is easy to maintain and overhaul. For the photovoltaic panel 200 adjustment system, a simple and reliable mechanical design can significantly reduce the failure rate and maintenance costs.

[0111] The design of the eccentric wheel 400 and the transmission assembly 700 utilizes the lever effect, and can achieve a larger angle adjustment with a smaller force. This means that the system requires less driving force when adjusting the angle of the photovoltaic panel 200, which helps to reduce the energy consumption of the motor or the drive system, and further improves the overall energy efficiency of the photovoltaic power generation system.

[0112] The working process of the angle adjustment subsystem is as follows: start the motor 600, the motor 600 drives the eccentric wheel 400 to rotate, the wheel surface of the eccentric wheel 400 is against the roller surface 741, and the roller 740 will rotate synchronously while the eccentric wheel 400 rotates. Due to the structure of the eccentric wheel 400 itself, the roller 740 will move up and down. Since the rotating end 711 is rotatably connected to the base 300, the up and down movement of the roller synchronously drives the transmission plate 710 up and down. It can be understood that during the process of the roller rising, the pushing end 731 pushes the gear 500 to rotate until the limit end 721 is engaged with the wheel surface of the gear 500, and the photovoltaic panel 200 rotates to a certain angle. Assuming that the angle has not yet met the requirements, the eccentric wheel 400 continues to rotate, and during the process of the roller descending, the pushing end 731 moves toward the defense line away from the gear 500. At this time, the limit end 721 also moves away from the wheel surface of the gear 500 synchronously, and the above-mentioned roller rising and descending operations are repeated.

[0113] Optionally, the diagnostic subsystem includes an environmental data monitoring module, a control module, an inspection and judgment module, and a communication module;

[0114] The environmental data monitoring module is used to monitor the environmental temperature, humidity and wind speed and obtain relevant environmental data, and transmit the relevant environmental data to the control module;

[0115] The control module obtains the photovoltaic module inspection factor according to the relevant data of the environment, and transmits the photovoltaic module inspection factor to the inspection judgment module;

[0116] The inspection judgment module obtains information on whether the photovoltaic assembly needs to be inspected based on the photovoltaic assembly inspection factor, and transmits the information on whether the photovoltaic assembly needs to be inspected to the communication module and the control system;

[0117] The communication module transmits information on whether the photovoltaic assembly needs to be inspected to the user end.

[0118] Specifically, when the inspection and judgment module makes a judgment, it refers to the following principles: when the photovoltaic component inspection factor is greater than or equal to the selection threshold of the photovoltaic component inspection factor, it indicates that the photovoltaic component needs to be inspected; when the photovoltaic component inspection factor is less than the selection threshold of the photovoltaic component inspection factor, it indicates that the photovoltaic component does not need to be inspected; the selection threshold of the photovoltaic component inspection factor is set by technical personnel in this field; when it is determined that the photovoltaic component needs to be inspected, the system stops the operation of the angle adjustment subsystem after receiving the information that inspection is required, that is, locks the movement of the motor 600 to ensure that the photovoltaic panel 200 continues to maintain the same position.

[0119] Optionally, the environmental data monitoring module includes a monitoring day setting submodule, a temperature monitoring submodule, a time analysis submodule, a humidity monitoring submodule, a wind speed monitoring submodule and an environmental data setting submodule;

[0120] The monitoring days setting submodule is used to set the total number of days for inspection and transmit it to the control module;

[0121] The temperature monitoring submodule is used to monitor and obtain the maximum value of the temperature checked every day and the minimum value of the temperature checked every day, and transmit them to the control module and the time analysis submodule;

[0122] The time analysis submodule is used to analyze and obtain the time interval between the maximum temperature difference of the air temperature checked every day, and transmit it to the control module;

[0123] The humidity monitoring submodule is used to monitor and obtain the average value of the humidity measured every day, and transmit it to the control module;

[0124] The wind speed monitoring submodule is used to monitor and obtain the maximum value of the wind speed measured every day, and transmit it to the control module;

[0125] The environmental data setting submodule is used to set a reference value of a high temperature, a reference value of a low temperature, an average value of a humidity reference and a maximum value of a wind speed reference, and transmit the values ​​to the control module;

[0126] The control module obtains a wind speed index detected every day based on the maximum value of the wind speed actually measured and the maximum value of the wind speed reference, obtains a low temperature index detected every day based on the minimum value of the air temperature detected every day and the reference value of the low temperature, obtains a high temperature index detected every day based on the maximum value of the air temperature detected every day and the reference value of the high temperature, and obtains a photovoltaic component inspection factor based on the total number of inspection days, the maximum value of the air temperature detected every day, the minimum value of the air temperature detected every day, the time interval between the maximum temperature differences detected every day, the high temperature index detected every day, the low temperature index detected every day, the average value of the humidity actually measured every day, the average value of the humidity reference and the wind speed index detected every day.

[0127] Optionally, the temperature monitoring submodule includes a temperature monitoring unit and a temperature analysis unit;

[0128] The temperature monitoring unit is used to monitor the real-time temperature;

[0129] The temperature analysis unit obtains the maximum value of the temperature checked every day and the minimum value of the temperature checked every day according to the real-time temperature analysis, and transmits them to the control module and the time analysis submodule.

[0130] Optionally, the humidity monitoring submodule includes a humidity monitoring unit and a humidity analysis unit;

[0131] The humidity monitoring unit is used to monitor the real-time humidity;

[0132] The humidity analysis unit obtains an average value of the humidity actually measured every day based on real-time humidity analysis, and transmits the value to the control module.

[0133] Optionally, the wind speed monitoring submodule includes a wind speed monitoring unit and a wind speed analysis unit;

[0134] The wind speed monitoring unit is used to monitor the real-time wind speed;

[0135] The wind speed analysis unit obtains the maximum value of the wind speed actually measured every day based on the real-time wind speed analysis, and transmits it to the control module.

[0136] Optionally, when the control module calculates the photovoltaic component inspection factor, the following formula is satisfied:

[0137]

[0138] Among them, Ee is the inspection factor of photovoltaic modules, A is the total number of inspection days, Check the maximum temperature on day a. is the minimum temperature detected on day a, t a is the time interval between checking the maximum temperature difference on day a, gw a The high temperature index is checked for day a, dw a The low temperature index is checked for day a, rh a is the average value of humidity measured on day a, rhck is the average value of humidity reference, fs a Check the wind speed index for day a.

[0139] Optionally, the control module satisfies the following formula when calculating:

[0140]

[0141]

[0142]

[0143] Among them, tmax is the reference value of high temperature;

[0144] tmin is the reference value of low temperature;

[0145] v a is the maximum value of the wind speed measured on day a, and vck is the maximum value of the wind speed reference.

[0146] Specifically, the total number of days for inspection is set by those skilled in the art, and is generally set to 7; the maximum value of the temperature checked every day, the minimum value of the temperature checked every day, the reference value of the high temperature and the reference value of the low temperature are all in degrees Celsius; the time interval between the maximum temperature difference checked every day is in hours; the maximum value of the wind speed measured every day and the maximum value of the wind speed reference are both in meters per second; the rapid change of temperature every day has the greatest impact on the photovoltaic modules, especially when the maximum value of the temperature checked every day is greater than or equal to the reference value of the high temperature, or the minimum value of the temperature checked every day is less than or equal to the reference value of the high temperature. When the humidity is greater than the reference value of the low temperature, it may cause problems such as thermal stress and thermal fatigue of the photovoltaic module materials, and may also cause physical damage such as cracks in the photovoltaic module materials; when the daily measured average humidity is greater than the average humidity reference, it may cause insulation failure, corrosion, optical performance degradation or hot spot effect of the photovoltaic modules; when the daily measured average humidity is less than the average humidity reference, it may cause drying, embrittlement, static electricity accumulation and stress concentration in the photovoltaic modules; when the daily measured maximum wind speed is greater than the maximum wind speed reference, it may affect the stability of the photovoltaic module structure itself.

[0147] The above units are only examples, and those skilled in the art may set different units according to actual needs when implementing this solution.

[0148] This embodiment solves the problem of low accuracy of traditional diagnostic systems. The system monitors the ambient temperature, humidity and wind speed in real time through the environmental data monitoring module, so that the diagnostic process can dynamically adapt to environmental conditions. This real-time environmental monitoring can more accurately reflect the status of photovoltaic modules in actual operation and avoid false alarms or missed alarms caused by environmental changes.

[0149] Embodiment 2: This embodiment includes all the contents of Embodiment 1 and provides a fault diagnosis system for a solar photovoltaic energy storage system.

[0150] A fault diagnosis system for a solar photovoltaic energy storage system, wherein the diagnosis subsystem further comprises a photovoltaic component data monitoring module and a fault judgment module;

[0151] The control system starts the photovoltaic module data monitoring module according to the information that the photovoltaic module needs to be checked;

[0152] The photovoltaic module data monitoring module is used to monitor and obtain relevant data of the photovoltaic module, and transmit the relevant data of the photovoltaic module to the control module;

[0153] The control module obtains the photovoltaic module failure factor according to the relevant data of the photovoltaic module, and transmits the photovoltaic module failure factor to the fault judgment module;

[0154] The fault judgment module obtains information on whether the photovoltaic module is faulty according to the fault factor of the photovoltaic module, and transmits the information on whether the photovoltaic module is faulty to the communication module;

[0155] The communication module transmits information on whether the photovoltaic module is faulty to the user end.

[0156] Specifically, the fault judgment module refers to the following principles when making judgments: when the photovoltaic component failure factor is greater than or equal to the selection threshold of the photovoltaic component failure factor, it indicates that the photovoltaic component has a failure; when the photovoltaic component failure factor is less than the selection threshold of the photovoltaic component failure factor, it indicates that the photovoltaic component has not a failure; the selection threshold of the photovoltaic component failure factor is set by a technician in this field; the photovoltaic component data monitoring module is started only after the control system receives information that the photovoltaic component needs to be inspected.

[0157] Optionally, the photovoltaic module data monitoring module includes a photovoltaic module information storage submodule, a tilt sensing submodule, a strain sensing submodule, a life analysis submodule, a visual analysis submodule and a surface temperature monitoring submodule;

[0158] The photovoltaic assembly information storage submodule is used to store the total number of photovoltaic panels 200 constituting the photovoltaic assembly, the total surface area of ​​each photovoltaic panel 200 and the surface temperature reference value of the photovoltaic panel 200, and transmit them to the control module;

[0159] The tilt sensor submodule is used to detect and obtain the initial tilt angle of each photovoltaic panel 200 and the current tilt angle of each photovoltaic panel 200, and transmit them to the control module;

[0160] The strain sensing submodule is used to detect and obtain the current strain value of each photovoltaic panel 200 and transmit it to the control module;

[0161] The age analysis submodule is used to analyze and obtain the service life of each photovoltaic panel 200, and transmit it to the control module;

[0162] The visual analysis submodule is used to analyze and obtain the roughness of the surface of each photovoltaic panel 200 and transmit it to the control module;

[0163] The surface temperature monitoring submodule is used to monitor and obtain the actual measured value of the surface temperature of each photovoltaic panel 200 and transmit it to the control module.

[0164] Optionally, the age analysis submodule includes a usage time recording unit, a current time acquisition unit and an age analysis unit;

[0165] The usage time recording unit is used to record the initial usage time of each photovoltaic panel 200 and transmit it to the age analysis unit;

[0166] The current time acquisition unit is used to acquire the current time and transmit it to the age analysis unit;

[0167] The age analysis unit obtains the service life of each photovoltaic panel 200 according to the initial use time of each photovoltaic panel 200 and the current time, and transmits the service life to the control module.

[0168] Optionally, the visual analysis submodule includes an image acquisition unit, an image preprocessing unit, a surface feature extraction unit and a roughness analysis unit;

[0169] The image acquisition unit is used to capture and obtain an initial image;

[0170] The image preprocessing unit performs denoising and segmentation processing on the initial image;

[0171] The surface feature extraction unit is used to extract the texture features of the photovoltaic panel surface;

[0172] The roughness analysis unit analyzes the texture features through image processing technology to obtain the roughness of the surface of each photovoltaic panel 200 and transmits it to the control module.

[0173] Optionally, when the control module calculates the failure factor of the photovoltaic module, the following formula is satisfied:

[0174]

[0175]

[0176] Among them, Fal is the failure factor of the photovoltaic module, B is the total number of photovoltaic panels that make up the photovoltaic module, and BT b is the surface temperature index of the bth photovoltaic panel, is the initial tilt angle of the bth photovoltaic panel, is the current tilt angle of the b-th photovoltaic panel; yb b is the current strain value of the b-th photovoltaic panel, nx b is the service life of the bth photovoltaic panel, cd b is the roughness of the surface of the b-th photovoltaic panel, s b is the total surface area of ​​the bth photovoltaic panel;

[0177] bt b is the measured value of the surface temperature of the bth photovoltaic panel, and btck is the reference value of the surface temperature of the photovoltaic panel.

[0178] Specifically, the initial tilt angle of each photovoltaic panel refers to the corresponding tilt angle obtained by testing after the photovoltaic panels are spliced ​​and installed in the target position; the test strain value is mainly used to analyze the bending of the photovoltaic panels. The larger the current strain value of each photovoltaic panel, the more curved it is, and the unit of the current strain value of each photovoltaic panel is microstrain; the unit of the service life of each photovoltaic panel is year, and when calculating, a year less than one year is counted as one year; the unit of the roughness of the surface of each photovoltaic panel is micron, and the roughness of the surface of each photovoltaic panel can be used to describe the actual state of its surface; the unit of the total surface area of ​​each photovoltaic panel is square meter; the photovoltaic panel surface refers to the side of the photovoltaic panel facing the sun, and the tilt angle of the photovoltaic panel is less than 90° when it is installed.

[0179] The above units are only examples, and those skilled in the art may set different units according to actual needs when implementing this solution.

[0180] This embodiment solves the problem of excessive human intervention in traditional diagnostic systems. The system can automatically determine whether a photovoltaic module is faulty based on the failure factors of the photovoltaic module. This intelligent judgment mechanism reduces the need for human intervention, improves the speed and accuracy of fault detection, and can quickly respond to and handle sudden faults.

[0181] The contents disclosed above are only preferred feasible embodiments of the present invention, and do not limit the protection scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the protection scope of the present invention. In addition, the elements therein can be updated as technology develops.

Claims

1. A fault diagnosis system for a solar photovoltaic energy storage system, characterized in that: The system includes a bracket, a photovoltaic module, an angle adjustment subsystem, a power distribution subsystem, an energy storage subsystem, a control system and a diagnostic subsystem; The photovoltaic assembly includes more than two photovoltaic panels, and all photovoltaic panels are rotatably connected to the bracket; There are more than two angle adjustment subsystems, all of which correspond to all photovoltaic panels one by one. The angle adjustment subsystems are connected between the bracket and the photovoltaic panel, and are used to adjust the rotation angle of the photovoltaic panel. The energy storage subsystem is used to store the electrical energy generated by all photovoltaic panels; The distribution subsystem is used to connect the energy storage subsystem and all photovoltaic panels to the power grid; The diagnostic subsystem is used to detect environmental factors and obtain information on whether the photovoltaic components need to be inspected, and transmit the information on whether the photovoltaic components need to be inspected to the user end and the control system; The control system locks the angle adjustment subsystem according to the information that needs to be checked on the photovoltaic assembly; The angle adjustment subsystem includes a base, an eccentric wheel, a gear, a motor, a transmission assembly and a connecting rod; The base is connected to the bracket; The eccentric wheel is rotatably connected to the bracket; The gear is rotatably connected to the bracket, the top of the gear is higher than the top of the eccentric wheel, and a gap is formed between the wheel surface of the gear and the wheel surface of the eccentric wheel; The transmission assembly is rotatably connected to the bracket, the transmission assembly is transmission-connected between the eccentric wheel and the gear, one end of the transmission assembly is transmission-connected to the wheel surface of the eccentric wheel, and the other end of the transmission assembly drives the gear to rotate and limits the rotation position of the gear; The motor is connected to the base, and the motor drives the eccentric wheel, and the rotation axis of the eccentric wheel, the rotation axis of the transmission assembly, the rotation axis of the gear and the rotation axis of the photovoltaic panel are all parallel to each other; The two ends of the connecting rod are rotatably connected to the gear and the photovoltaic panel respectively; The control system locks the motor according to the information that the photovoltaic assembly needs to be checked; The transmission assembly comprises a roller surface, a pushing end, a rotating end and a limiting end. The pushing end is higher than the limiting end, and the limiting end is higher than the rotating end. The roller surface abuts against the wheel surface of the eccentric wheel. The rotating end is rotatably connected to the base. The rotating axis of the rotating end is parallel to the rotating axis of the photovoltaic panel. The pushing end is adapted to the gear and drives the gear to rotate. The limiting end can be clamped on the wheel surface of the gear.

2. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 1, characterized in that: The transmission assembly includes a transmission plate, a limit plate, a push rod and a roller; The rotating end is located on the transmission plate; The roller is rotatably connected to the transmission plate, the rotation axis of the roller is parallel to the rotation axis of the photovoltaic panel, and the roller surface is located on the roller; The limit plate is connected to the transmission plate, and the limit end is located on the limit plate; One end of the push rod is rotatably connected to the transmission plate, one end of the push rod is higher than the limit end, the other end of the push rod is the push end, and the rotation axis of the push rod is parallel to the rotation axis of the photovoltaic panel.

3. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 2, characterized in that: The diagnostic subsystem includes an environmental data monitoring module, a control module, an inspection and judgment module, and a communication module; The environmental data monitoring module is used to monitor the environmental temperature, humidity and wind speed and obtain relevant environmental data, and transmit the relevant environmental data to the control module; The control module obtains the photovoltaic module inspection factor according to the relevant data of the environment, and transmits the photovoltaic module inspection factor to the inspection judgment module; The inspection judgment module obtains information on whether the photovoltaic assembly needs to be inspected based on the photovoltaic assembly inspection factor, and transmits the information on whether the photovoltaic assembly needs to be inspected to the communication module and the control system; The communication module transmits information on whether the photovoltaic assembly needs to be inspected to the user end.

4. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 3, characterized in that: The environmental data monitoring module includes a monitoring day setting submodule, a temperature monitoring submodule, a time analysis submodule, a humidity monitoring submodule, a wind speed monitoring submodule and an environmental data setting submodule; The monitoring days setting submodule is used to set the total number of days for inspection and transmit it to the control module; The temperature monitoring submodule is used to monitor and obtain the maximum value of the temperature checked every day and the minimum value of the temperature checked every day, and transmit them to the control module and the time analysis submodule; The time analysis submodule is used to analyze and obtain the time interval between the maximum temperature difference of the air temperature checked every day, and transmit it to the control module; The humidity monitoring submodule is used to monitor and obtain the average value of the humidity measured every day, and transmit it to the control module; The wind speed monitoring submodule is used to monitor and obtain the maximum value of the wind speed measured every day, and transmit it to the control module; The environmental data setting submodule is used to set a reference value of a high temperature, a reference value of a low temperature, an average value of a humidity reference and a maximum value of a wind speed reference, and transmit the values ​​to the control module; The control module obtains a wind speed index detected every day based on the maximum value of the wind speed actually measured and the maximum value of the wind speed reference, obtains a low temperature index detected every day based on the minimum value of the air temperature detected every day and the reference value of the low temperature, obtains a high temperature index detected every day based on the maximum value of the air temperature detected every day and the reference value of the high temperature, and obtains a photovoltaic component inspection factor based on the total number of inspection days, the maximum value of the air temperature detected every day, the minimum value of the air temperature detected every day, the time interval between the maximum temperature differences detected every day, the high temperature index detected every day, the low temperature index detected every day, the average value of the humidity actually measured every day, the average value of the humidity reference and the wind speed index detected every day.

5. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 4, characterized in that: The temperature monitoring submodule includes a temperature monitoring unit and a temperature analysis unit; The temperature monitoring unit is used to monitor the real-time temperature; The temperature analysis unit obtains the maximum value of the temperature checked every day and the minimum value of the temperature checked every day according to the real-time temperature analysis, and transmits them to the control module and the time analysis submodule.

6. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 5, characterized in that: The humidity monitoring submodule includes a humidity monitoring unit and a humidity analysis unit; The humidity monitoring unit is used to monitor the real-time humidity; The humidity analysis unit obtains an average value of the humidity actually measured every day based on real-time humidity analysis, and transmits the value to the control module.

7. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 6, characterized in that: The wind speed monitoring submodule includes a wind speed monitoring unit and a wind speed analysis unit; The wind speed monitoring unit is used to monitor the real-time wind speed; The wind speed analysis unit obtains the maximum value of the wind speed actually measured every day based on the real-time wind speed analysis, and transmits it to the control module.

8. A fault diagnosis system for a solar photovoltaic energy storage system as claimed in claim 7, characterized in that: When the control module calculates the photovoltaic module inspection factor, the following formula is satisfied: Among them, Ee is the inspection factor of photovoltaic modules, A is the total number of days for inspection, and temp maxa The maximum temperature detected on day a, temp mina is the minimum temperature found on day a, t a is the time interval between checking the maximum temperature difference on day a, gw a The high temperature index is checked for day a, dw a The low temperature index is checked for day a, rh a is the average value of humidity measured on day a, rhck is the average value of humidity reference, fs a Check the wind speed index for day a.

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