Miniaturized photovoltaic inverter with high integration level

Abstract

A miniaturized high-integration-level photovoltaic inverter comprises an inverter shell, a supporting frame and a junction box, a display screen is installed in the middle of the inverter shell, the junction box is installed on the side face of the inverter shell, the supporting frame is fixed to the bottom of the inverter shell, a heat dissipation plate is installed on the side face of the inverter shell, and the heat dissipation plate is fixed to the bottom of the inverter shell. A strip-shaped transformer is installed at the position, attached to the inverter shell, of the side face of the main control board, the strip-shaped transformer is fixed to a second installation plate, a filter is installed on the back face of the second installation plate, and a fixed fan is installed at the included angle position of the filter and the fixed fan. Through the compact design, high integration level and miniaturization are realized, installation and transportation are convenient, space occupation is reduced, and the overall efficiency of the system is improved. And stable operation of the inverter in a high-temperature environment is ensured. And the heat dissipation assembly is detachably designed, rapid mounting and dismounting are achieved through a sliding plate and a locking pressing plate, and a user can conveniently adjust a heat dissipation scheme according to the actual situation.

Description

Technical Field

[0001] The utility model relates to the technical field related to photovoltaic inverters, in particular to a miniaturized highly integrated photovoltaic inverter. Background Art

[0002] As the global demand for renewable energy continues to increase, photovoltaic power generation, as a clean and renewable energy form, has received widespread attention and application. As an important component of the photovoltaic power generation system, the performance of the photovoltaic inverter directly determines the overall efficiency and reliability of the photovoltaic power generation system. Traditional photovoltaic inverters have problems such as large size, low integration, and poor heat dissipation performance, which makes it difficult to meet the requirements of modern photovoltaic power generation systems for high efficiency, high reliability and miniaturization.

[0003] In order to improve the integration and heat dissipation performance of photovoltaic inverters and realize miniaturization design, researchers and engineers are constantly exploring new design concepts and technical means. As a new type of photovoltaic inverter product, miniaturized high-integration photovoltaic inverters achieve higher integration and smaller size by adopting advanced integration technology and optimized design, thus meeting the needs of modern photovoltaic power generation systems.

[0004] However, the design of miniaturized and highly integrated photovoltaic inverters also faces a series of challenges. First, how to achieve miniaturization design while ensuring the performance of the inverter requires comprehensive consideration of multiple aspects such as the structure, circuit design, and thermal design of the inverter. Second, how to improve the heat dissipation performance of the inverter to ensure its stable operation in a high temperature environment is also an issue that needs to be considered during the design process. Utility Model Content

[0005] In order to fill the gap in the market, the utility model provides a miniaturized and highly integrated photovoltaic inverter.

[0006] The purpose of the utility model is to provide a miniaturized and highly integrated photovoltaic inverter to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a miniaturized high-integration photovoltaic inverter, comprising an inverter housing, a support frame and a junction box, a display screen is installed in the middle of the inverter housing, a junction box is installed on the side of the inverter housing, and a support frame is fixed at the bottom of the inverter housing, a heat sink is installed on the side of the inverter housing, and a main control board is installed inside the inverter housing, a strip transformer is installed at the position of the side of the main control board that fits the inverter housing, and the strip transformer is fixed on a second mounting plate, and a filter is installed on the back of the second mounting plate, a ventilation hole is opened in the middle of the bottom plate at the bottom of the inverter housing, and a first mounting plate is installed on the bottom plate on the side of the ventilation hole, and a rectifier is installed on the back of the first mounting plate, a heat dissipation mounting frame is arranged in the middle of the back of the bottom plate, and a detachable heat dissipation component is inserted in the heat dissipation mounting frame, and a fixed fan is installed at the angle between the filter and the fixed fan.

[0008] Furthermore, a connecting buckle is provided at the upper end of the inverter housing, and the top cover on the inverter housing is a detachable structure, and a display screen is installed in the middle of the inverter housing.

[0009] Furthermore, heat sinks are arranged on the outside of the rectifier and the filter, and the gap between the heat sinks on the rectifier is in the same direction as the wind flow of the fixed fan, while the heat sinks arranged on the filter are in the same direction as the wind flow formed by the heat dissipation assembly.

[0010] Furthermore, a crossbeam is fixed at the bottom of the support frame, and a mounting hole is provided at the bottom of the support frame.

[0011] Furthermore, the heat dissipation assembly includes a skateboard, limiting protrusions evenly arranged inside the skateboard, and a cooling fan fixed on the skateboard between two adjacent groups of limiting protrusions. At the same time, a locking pressure plate is hinged at the front end of the skateboard, and a buckle is arranged on the locking pressure plate, and the locking pressure plate is clamped at the front end of the heat dissipation mounting frame through the buckle.

[0012] Furthermore, a slide rail is provided between the slide plate of the heat dissipation assembly and the heat dissipation mounting frame, so that the slide plate can slide back and forth along the heat dissipation mounting frame.

[0013] Furthermore, the inverter housing is made of lightweight engineering plastics, and the junction box adopts a modular structure, and the junction box is detachable from the inverter housing.

[0014] Furthermore, an intelligent heat dissipation system is integrated inside the inverter housing, which can adjust the speed of the cooling fan in the heat dissipation assembly and the working state of the fixed fan in real time according to the temperature inside the inverter to ensure that the inverter maintains an optimal operating temperature while operating efficiently.

[0015] Furthermore, the inverter also has a fault warning and self-repair mechanism. When an abnormality occurs in the rectifier, filter or main control board of the inverter's internal components, the system can automatically detect and trigger a warning signal, and at the same time attempt to perform simple self-repair operations, such as restarting related modules or adjusting the working status, to reduce downtime and improve system reliability.

[0016] Furthermore, the inverter is internally integrated with an intelligent fault location and diagnosis system. When a fault occurs in the inverter, the system can automatically detect the fault point and send detailed fault information and diagnosis suggestions to the user through a display screen or a wireless communication interface.

[0017] Compared with the prior art, the beneficial effects of the utility model are: through compact design, high integration and miniaturization are achieved, which is convenient for installation and transportation, while also reducing space occupancy and improving the overall efficiency of the system; a connecting clip and a removable top cover are arranged on the upper end of the inverter housing, which is convenient for maintenance and upgrading of the inverter interior, while the display screen installed in the middle provides an intuitive operation and monitoring interface, improving the user experience; by arranging heat sinks on the outside of the rectifier and the filter, and matching them with the wind flow direction of the fixed fan and the heat dissipation assembly, the heat dissipation performance is effectively improved, ensuring that the inverter can operate stably even in a high temperature environment.

[0018] The detachable design of the heat dissipation component enables quick installation and disassembly through the slide plate and locking pressure plate, which is convenient for users to adjust the heat dissipation plan according to actual conditions, and also facilitates maintenance and replacement; the slide rail design between the heat dissipation component and the heat dissipation mounting frame enables the slide plate to slide back and forth along the heat dissipation mounting frame, which is convenient for users to adjust according to needs, improving the flexibility and efficiency of heat dissipation.

[0019] The inverter housing is made of lightweight engineering plastics, which reduces the weight of the inverter and also has good waterproof, dustproof and corrosion resistance, which increases the service life and stability of the inverter. The modular design of the junction box makes wiring more convenient and also facilitates replacement and maintenance.

[0020] The intelligent heat dissipation system integrated inside the inverter can adjust the speed of the cooling fan and the working status of the fixed fan in real time according to the temperature inside the inverter, ensuring that the inverter maintains the optimal operating temperature while running efficiently, thereby improving the efficiency and stability of the inverter.

[0021] The inverter is equipped with a fault warning and self-repair mechanism that can automatically detect and trigger warning signals, while attempting simple self-repair operations, reducing downtime and improving system reliability and maintainability. The intelligent fault location and diagnosis system integrated inside the inverter can automatically detect the fault point and send detailed fault information and diagnostic suggestions to the user through the display or wireless communication interface, providing users with convenient troubleshooting and solutions, and improving system availability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0023] Figure 2 A schematic diagram of the internal structure of the utility model with the top cover removed;

[0024] Figure 3 It is a three-dimensional schematic diagram of the back of the structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the disassembly of the junction box of the utility model structure;

[0026] Figure 5 This is a schematic diagram of the disassembly of the heat dissipation component of the structure of the utility model;

[0027] Figure 6 This is a schematic diagram of the heat dissipation component of the utility model structure.

[0028] In the figure: 1. Inverter housing; 2. Display screen; 3. Junction box; 4. Heat sink; 5. Support frame; 6. Strip transformer; 7. Main control board; 8. Connecting buckle; 9. Bottom plate; 10. Heat sink mounting frame; 11. Ventilation hole; 12. Rectifier; 13. Fixed fan; 14. Filter; 15. Crossbeam; 16. Top cover; 17. First mounting plate; 18. Second mounting plate; 19. Heat sink assembly; 20. Slide plate; 21. Cooling fan; 22. Limiting bump; 23. Locking pressure plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-6The utility model provides a technical solution: a miniaturized high-integration photovoltaic inverter, including an inverter housing 1, a support frame 5 and a junction box 3, a display screen 2 is installed in the middle of the inverter housing 1, and a junction box 3 is installed on the side of the inverter housing 1, and a support frame 5 is fixed at the bottom of the inverter housing 1, a heat sink 4 is installed on the side of the inverter housing 1, and a main control board 7 is installed inside the inverter housing 1, and a strip transformer 6 is installed on the side of the main control board 7 that fits the inverter housing 1, and the strip transformer 6 It is fixed to a second mounting plate 18, and a filter 14 is installed on the back of the second mounting plate 18. A ventilation hole 11 is opened in the middle of the bottom plate 9 at the bottom of the inverter housing 1, and a first mounting plate 17 is installed on the bottom plate 9 on the side of the ventilation hole 11, and a rectifier 12 is installed on the back of the first mounting plate 17. A heat dissipation mounting frame 10 is arranged in the middle of the back of the bottom plate 9, and a detachable heat dissipation component 19 is inserted in the heat dissipation mounting frame 10, and a fixed fan 13 is installed at the angle between the filter 14 and the fixed fan 13.

[0031] The direct current generated by the photovoltaic panel enters the inverter through the junction box 3; the direct current first enters the rectifier 12 for pre-processing to ensure the stability and quality of the direct current; the rectified direct current enters the strip transformer 6 for voltage conversion, converting it into a voltage suitable for the internal circuit of the inverter; the main control board 7 controls the switch of the strip transformer 6 to achieve the conversion from direct current to alternating current; by changing the frequency and duty cycle of the switch, the voltage, frequency and phase of the output alternating current can be accurately controlled; the filter 14 is used to smooth the output waveform, remove high-order harmonics, and ensure the quality of the output alternating current;

[0032] Display screen 2 is used to display the working status, output parameters, fault information, etc. of the inverter, so that users can monitor and understand the operating status of the inverter in real time. The inverter also has a communication interface, which can communicate with the host computer, monitoring system, etc. to realize remote monitoring, data uploading and remote control functions;

[0033] The heat sink 4 and the detachable heat sink assembly 19 inside the heat sink mounting frame 10 together constitute the heat sink system of the inverter; they dissipate the heat generated inside the inverter to the external environment by natural convection and forced convection, ensuring that the inverter can operate stably even in a high temperature environment; the fixed fan 13 is installed at the angle between the filter 14 and the heat sink assembly 19 to enhance the heat dissipation effect; the main control board 7 can adjust the fan speed and working state in real time according to the temperature inside the inverter; the inverter also integrates a variety of protection functions, such as overvoltage protection, undervoltage protection, overtemperature protection, etc.; these protection functions can monitor the electrical environment inside and outside the inverter in real time, and once an abnormality is found, the corresponding protection measures will be immediately activated to protect the inverter and its connected load from damage;

[0034] The inverter is fixed at the installation position by the support frame 5, which is convenient for installation and removal;

[0035] The junction box 3 facilitates users to connect and disconnect cables, simplifying the installation and maintenance process;

[0036] The heat dissipation component 19 is designed to be detachable, which is convenient for users to clean and replace, thereby improving the maintenance convenience of the inverter.

[0037] A connecting buckle 8 is provided at the upper end of the inverter housing 1 , and the top cover 16 is a detachable structure on the inverter housing 1 , and a display screen 2 is installed in the middle of the inverter housing 1 .

[0038] The rectifier 12 and the filter 14 are both provided with heat sinks on the outside, and the heat sink gap on the rectifier 12 is in the same direction as the wind flow of the fixed fan 13 . Meanwhile, the heat sink provided on the filter 14 is in the same direction as the wind flow formed by the heat dissipation assembly 19 .

[0039] A crossbeam 15 is fixed to the bottom of the support frame 5 , and a mounting hole is provided at the bottom of the support frame 5 .

[0040] The top and sides of the inverter housing 1 are designed with heat sinks to increase the heat dissipation area and improve the heat dissipation efficiency; heat sinks are arranged on the outside of the rectifier 12 and the filter 14 to dissipate heat for these two important components respectively; the gap between the heat sinks on the rectifier 12 is in the same direction as the wind flow of the fixed fan 13, so that the airflow generated by the fan can directly blow through the heat sink, thereby enhancing the heat dissipation effect; at the same time, the heat sink arranged on the filter 14 is in the same direction as the wind flow formed by the heat dissipation component 19, thereby ensuring that the heat can be discharged smoothly; the heat dissipation component 19 is located in the heat dissipation mounting frame 10 at the bottom of the inverter housing 1, and can be installed or disassembled as needed, thereby facilitating the user to clean and replace it; the heat dissipation component 19 can be used in conjunction with the fixed fan 13 to form forced convection and improve the heat dissipation effect; the main control board 7 adjusts the speed and working state of the fixed fan 13 in real time according to the temperature inside the inverter, thereby ensuring that the inverter can operate stably even in a high temperature environment;

[0041] The inverter is fixed in the installation position by the support frame 5, and a crossbeam 15 is fixed at the bottom of the support frame 5 to increase the structural stability; a mounting hole is also provided at the bottom of the support frame 5 to facilitate the user to fix the installation; a connecting buckle 8 is provided at the upper end of the inverter housing 1, and the top cover 16 is a detachable structure to facilitate the user to maintain and replace the internal components; the junction box 3 is convenient for the user to connect and disconnect the cables, simplifying the installation and maintenance process.

[0042] The heat dissipation assembly 19 includes a skateboard 20, limiting protrusions 22 evenly arranged inside the skateboard 20, and a cooling fan 21 fixed on the skateboard 20 between two adjacent groups of limiting protrusions 22. At the same time, a locking pressure plate 23 is hinged at the front end of the skateboard 20, and a buckle is provided on the locking pressure plate 23. The locking pressure plate 23 is clamped at the front end of the heat dissipation mounting frame 10 through the buckle.

[0043] A slide rail is provided between the slide plate 20 of the heat dissipation assembly 19 and the heat dissipation mounting frame 10 , so that the slide plate 20 can slide forward and backward along the heat dissipation mounting frame 10 .

[0044] The inverter housing 1 is made of lightweight engineering plastics, and the junction box 3 adopts a modular structure. The junction box 3 is detachable from the inverter housing 1 .

[0045] The inverter housing 1 is made of lightweight engineering plastic and has good heat dissipation performance; the heat dissipation component 19 includes a slide plate 20, a heat dissipation fan 21 and a locking pressure plate 23; the slide plate 20 is mounted on the heat dissipation mounting frame 10 through a slide rail and can slide back and forth; the heat dissipation fan 21 is fixed on the slide plate 20 and positioned by two adjacent groups of limit protrusions 22; when the internal temperature of the inverter rises, the heat dissipation fan 21 starts to blow heat out of the inverter; the slide plate 20 can slide along the slide rail to adjust the position of the heat dissipation fan 21 to meet different heat dissipation requirements; the locking pressure plate 23 is connected to the front end of the heat dissipation mounting frame 10 through a buckle, and the slide plate 20 can be fixed on the heat dissipation mounting frame 10 to prevent it from sliding; when the heat dissipation fan 21 needs to be cleaned or replaced, the locking pressure plate 23 can be opened to slide the slide plate 20 out of the heat dissipation mounting frame 10;

[0046] The inverter is fixed in the installation position by a support frame 5, and a crossbeam 15 is fixed at the bottom of the support frame 5 to increase the structural stability; the inverter housing 1 is made of lightweight engineering plastic, which not only reduces the weight of the inverter but also improves its heat dissipation performance; the junction box 3 adopts a modular structure, which is convenient for users to connect and disconnect cables and simplifies the installation and maintenance process; the junction box 3 can be removed from the inverter housing 1, which is convenient for users to maintain or replace internal components; the slide plate 20 of the heat dissipation assembly 19 is connected to the heat dissipation mounting frame 10 through a slide rail, and can be slid and adjusted as needed to meet different heat dissipation requirements; when the cooling fan 21 needs to be cleaned or replaced, the locking pressure plate 23 can be easily opened to slide the slide plate 20 out of the heat dissipation mounting frame 10.

[0047] An intelligent heat dissipation system is integrated inside the inverter housing 1. The system can adjust the speed of the heat dissipation fan 21 in the heat dissipation component 19 and the working state of the fixed fan 13 in real time according to the temperature inside the inverter to ensure that the inverter maintains an optimal operating temperature while operating efficiently.

[0048] The inverter housing is the main protective structure of the inverter, which protects the electronic components inside the inverter from the influence of the external environment; the intelligent heat dissipation system is integrated inside the inverter housing and includes a temperature sensor for monitoring and adjusting the temperature inside the inverter; the heat dissipation component is a device used for heat dissipation inside the inverter, which usually includes a heat sink, a cooling fan, etc.; it generates wind flow through rotation to take away the heat generated inside the inverter; the intelligent heat dissipation system can monitor the temperature inside the inverter in real time;

[0049] When the temperature exceeds a preset threshold, the system will adjust the speed of the cooling fan; if the temperature is high, the fan speed will increase to speed up the heat dissipation; if the temperature is low, the fan speed may decrease to reduce energy consumption and noise;

[0050] The fixed fan 13 may be another heat dissipation device, which may have a fixed speed or working mode; the intelligent cooling system may also control the working state of the fixed fan; when the temperature of the inverter is very high, the system may start the fixed fan to provide additional heat dissipation capacity; through the regulation of the intelligent cooling system, the inverter can maintain an optimal working temperature while operating efficiently; the appropriate temperature is very important for the performance and life of the inverter; too high or too low temperature may affect the performance and reliability of the inverter;

[0051] Inverter intelligent cooling system control algorithm

[0052] class InverterCoolingSystem:

[0053] def __init__(self, max_temp, min_temp, cooling_fans):

[0054] self.max_temp = max_temp

[0055] self.min_temp = min_temp

[0056] self.cooling_fans = cooling_fans

[0057] self.last_temp = None

[0058] def set_fan_speeds(self, fan_speeds):

[0059] # Set the fan speed according to the passed fan_speeds list

[0060] for fan, speed in zip(self.cooling_fans, fan_speeds):

[0061] fan.set_speed(speed)

[0062] def adjust_cooling(self, current_temp):

[0063] # Adjust the speed of the cooling fan according to the current temperature

[0064] if self.last_temp is None:

[0065] # First call, set the initial fan speed

[0066] self.set_fan_speeds([fan.min_speed for fan in self.cooling_fans])

[0067] self.last_temp = current_temp

[0068] return

[0069] # Calculate temperature difference

[0070] temp_diff = current_temp - self.last_temp

[0071] # Adjust fan speed based on temperature difference

[0072] if current_temp>self.max_temp:

[0073] # The temperature is too high, increase the fan speed

[0074] fan_speeds = [fan.max_speed for fan in self.cooling_fans]

[0075] elif current_temp <self.min_temp:

[0076] # The temperature is too low, reduce the fan speed

[0077] fan_speeds = [fan.min_speed for fan in self.cooling_fans]

[0078] else:

[0079] # The temperature is moderate, and the fan speed is adjusted according to the temperature difference

[0080] fan_speeds = [fan.min_speed + (fan.max_speed - fan.min_speed) *(temp_diff / (self.max_temp - self.min_temp))

[0081] for fan in self.cooling_fans]

[0082] # Ensure that the fan speed is within the legal range

[0083] fan_speeds = [max(fan.min_speed, min(fan.max_speed, speed)) forspeed in fan_speeds]

[0084] # Update the fan speed and store the current temperature

[0085] self.set_fan_speeds(fan_speeds)

[0086] self.last_temp = current_temp

[0087] The inverter also has a fault warning and self-repair mechanism. When an abnormality occurs in the inverter's internal components, such as the rectifier 12, filter 14 or main control board 7, the system can automatically detect and trigger a warning signal, and at the same time try to perform simple self-repair operations, such as restarting related modules or adjusting the working status, to reduce downtime and improve system reliability.

[0088] Fault warning algorithms include real-time monitoring algorithms, warning threshold algorithms, and prediction algorithms;

[0089] Real-time monitoring algorithm: The inverter needs to monitor key parameters in real time, such as DC input voltage, DC input current, AC output voltage, AC output current, frequency, etc., as well as environmental parameters such as temperature. These parameters can reflect the working status and performance of the inverter. When these parameters fluctuate abnormally or deviate from the set values, it is likely that the inverter is faulty.

[0090] Early warning threshold algorithm: Set early warning thresholds for each key parameter. When the parameter value monitored in real time exceeds or falls below the set threshold, the system will trigger a fault early warning signal. These thresholds can be set based on historical data, equipment specifications, and industry standards.

[0091] Prediction algorithm: Use historical data and machine learning algorithms (such as sparse autoencoder algorithm, clustering algorithm, etc.) to predict the fault trend of the inverter. By analyzing the historical monitoring signals of the inverter cluster, extracting key features and training the prediction model, early identification and early warning of faults can be achieved.

[0092] The self-repair algorithm includes a self-diagnosis algorithm, a self-repair decision algorithm, and a self-repair execution algorithm;

[0093] Self-diagnosis algorithm: When the inverter has a fault warning, the self-diagnosis algorithm will start to analyze the cause of the fault. This can be achieved by collecting and analyzing relevant parameters, logs and error information when the fault occurs. The self-diagnosis algorithm will try to identify the fault type, location and cause, and provide guidance for self-repair actions.

[0094] Self-repair decision algorithm: Based on the results of self-diagnosis, the self-repair decision algorithm will decide what self-repair action to take. This may include restarting related modules, adjusting working status, switching to backup power, etc. The self-repair decision algorithm needs to comprehensively consider factors such as the severity of the fault, the effectiveness of the self-repair action, and the reliability of the system.

[0095] Self-repair execution algorithm: Based on the results of the self-repair decision algorithm, the self-repair execution algorithm will perform the corresponding self-repair operation. This may involve direct operation of the inverter hardware or software. The self-repair execution algorithm needs to ensure the accuracy and safety of the operation and minimize the impact on the normal operation of the system.

[0096] The inverter is integrated with an intelligent fault location and diagnosis system. When a fault occurs in the inverter, the system can automatically detect the fault point and send detailed fault information and diagnosis suggestions to the user through the display screen 2 or the wireless communication interface.

[0097] Data collection and real-time monitoring: The system continuously monitors the working status of the inverter by collecting real-time operating data inside the inverter, such as voltage, current, temperature, power factor, etc.

[0098] Data collection algorithm: ensures real-time, accurate and comprehensive collection of operating data inside the inverter.

[0099] def collect_data():

[0100] real_time_data = get_inverter_data()

[0101] return real_time_data

[0102] data = collect_data()

[0103] Feature extraction and analysis: Extract key features from the collected data and use data analysis techniques to identify possible fault characteristics and trends. This usually involves data preprocessing, feature selection, and data mining steps.

[0104] Feature extraction algorithm: Extract key features related to faults from the collected data, such as voltage fluctuations, current anomalies, temperature rise, etc.

[0105] def extract_features(data):

[0106] voltage = data['voltage']

[0107] current = data['current']

[0108] temperature = data['temperature']

[0109] return {'voltage': voltage, 'current': current, 'temperature':temperature}

[0110] features = extract_features(data)

[0111] Fault pattern recognition: Through machine learning or deep learning algorithms, the extracted features are subjected to pattern recognition to identify the specific fault type and fault point. This may require the use of classification algorithms, clustering algorithms, or anomaly detection algorithms, etc.

[0112] Fault pattern recognition algorithm: Use machine learning or deep learning algorithms to perform pattern recognition on the extracted features to identify the specific fault type and fault point. This may involve training a classifier or anomaly detector.

[0113] from sklearn.svm import SVC

[0114] model = SVC(loaded_from='path_to_trained_model')

[0115] def recognize_fault_mode(features):

[0116] fault_type = model.predict([features])

[0117] return fault_type[0]

[0118] fault_type = recognize_fault_mode(features)

[0119] Fault location technology: Based on the results of fault pattern recognition, a specific fault location algorithm is used to accurately determine the specific location where the fault occurs.

[0120] Fault location algorithm: Based on the results of fault pattern recognition, a specific fault location algorithm is used to determine the specific location of the fault. This may involve building a mathematical model of the inverter, analyzing the signal transmission path, or using an expert knowledge base.

[0121] def locate_fault(fault_type, features):

[0122] fault_mapping = {

[0123] 'over_voltage': 'Voltage Sensor',

[0124] 'over_current': 'Current Sensor',

[0125] 'over_temperature': 'Heat Sink'

[0126] }

[0127] fault_location = fault_mapping.get(fault_type, 'Unknown')

[0128] return fault_location

[0129] fault_location = locate_fault(fault_type, features)

[0130] Communication interface technology: The system interacts with the user through a display screen or a wireless communication interface. The display screen can intuitively display fault information and diagnostic suggestions, while the wireless communication interface can send this information to a remote monitoring center or terminal devices such as the user's mobile phone.

[0131] The DC power generated by the photovoltaic panel first enters the DC-DC converter inside the inverter, which converts the DC power output by the solar panel into DC power suitable for use by the internal circuit of the inverter; the converted DC power is stored and waveform smoothed through the intermediate filter 14 to ensure the stability of the output power; next, the AC-AC converter converts the DC power output by the intermediate capacitor into AC power. During this conversion process, the voltage, frequency and phase of the output AC power can be controlled by changing the switching frequency and duty cycle of the converter. In the AC synchronization stage, the inverter synchronizes the output AC power with the grid through the internal synchronization circuit, which ensures that the power output by the inverter is consistent with the phase, frequency and waveform of the grid voltage, so that it can be safely and stably connected to the grid; after being connected to the grid, the inverter will automatically adjust the power and voltage of the output power according to the needs of the grid to achieve maximum power point tracking and stable grid-connected operation. The inverter integrates a variety of protection functions such as overvoltage protection and undervoltage protection. Protection and over-temperature protection; these protection functions can monitor the electrical environment inside and outside the inverter in real time. Once an abnormal situation is found, the corresponding protection measures will be immediately activated to protect the inverter and its connected loads from damage. The inverter also has an intelligent control function, which can automatically detect and locate the fault point, and send detailed fault information and diagnostic suggestions to the user through the display or wireless communication interface; in addition, the inverter also has a fault warning and self-repair mechanism, which can automatically try to repair simple faults, reduce downtime, and improve system reliability; the inverter adopts an efficient heat dissipation design inside, including a heat sink 4, a heat sink fan 21, and a heat sink. Multiple heat dissipation elements; these heat dissipation elements can quickly dissipate the heat inside the inverter to the external environment, ensuring that the inverter can operate stably even in a high temperature environment. The intelligent heat dissipation system integrated inside the inverter can adjust the speed and working state of the cooling fan in real time according to the temperature inside the inverter, so as to ensure that the inverter maintains the optimal operating temperature while operating efficiently.

[0132] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A miniaturized highly integrated photovoltaic inverter, characterized in that: The invention comprises an inverter housing (1), a support frame (5) and a junction box (3); a display screen (2) is installed in the middle of the inverter housing (1), a junction box (3) is installed on the side of the inverter housing (1), and a support frame (5) is fixed at the bottom of the inverter housing (1); a heat sink (4) is installed on the side of the inverter housing (1), and a main control board (7) is installed inside the inverter housing (1); a strip transformer (6) is installed at a position on the side of the main control board (7) that is in contact with the inverter housing (1), and the strip transformer (6) is fixed to a second mounting plate (18); and the first mounting plate (18) is fixed to the second mounting plate (18). A filter (14) is mounted on the back of the second mounting plate (18); a ventilation hole (11) is provided in the middle of the bottom plate (9) at the bottom of the inverter housing (1); a first mounting plate (17) is mounted on the bottom plate (9) on the side of the ventilation hole (11); a rectifier (12) is mounted on the back of the first mounting plate (17); a heat dissipation mounting frame (10) is provided in the middle of the back of the bottom plate (9); a detachable heat dissipation component (19) is inserted into the heat dissipation mounting frame (10); and a fixed fan (13) is mounted at an angle between the filter (14) and the fixed fan (13).

2. A miniaturized highly integrated photovoltaic inverter according to claim 1, characterized in that: The upper end of the inverter housing (1) is provided with a connecting buckle (8), the top cover (16) on the inverter housing (1) is a detachable structure, and a display screen (2) is installed in the middle of the inverter housing (1).

3. A miniaturized highly integrated photovoltaic inverter according to claim 2, characterized in that: The rectifier (12) and the filter (14) are both provided with heat sinks on the outside, and the heat sink gap on the rectifier (12) is in the same direction as the wind flow of the fixed fan (13), while the heat sink provided on the filter (14) is in the same direction as the wind flow formed by the heat dissipation component (19).

4. A miniaturized highly integrated photovoltaic inverter according to claim 3, characterized in that: A crossbeam (15) is fixed to the bottom of the support frame (5), and a mounting hole is provided at the bottom of the support frame (5).

5. A miniaturized highly integrated photovoltaic inverter according to claim 4, characterized in that: The heat dissipation assembly (19) comprises a slide plate (20), limiting protrusions (22) evenly arranged inside the slide plate (20), and a heat dissipation fan (21) fixed on the slide plate (20) between two adjacent groups of limiting protrusions (22); a locking pressure plate (23) is hingedly connected to the front end of the slide plate (20), and a buckle is arranged on the locking pressure plate (23), and the locking pressure plate (23) is clamped to the front end of the heat dissipation mounting frame (10) through the buckle.

6. A miniaturized highly integrated photovoltaic inverter according to claim 5, characterized in that: A slide rail is provided between the slide plate (20) of the heat dissipation assembly (19) and the heat dissipation mounting frame (10), so that the slide plate (20) can slide forward and backward along the heat dissipation mounting frame (10).

7. A miniaturized highly integrated photovoltaic inverter according to claim 1, characterized in that: The inverter housing (1) is made of lightweight engineering plastics, and the junction box (3) adopts a modular structure; the junction box (3) is detachable from the inverter housing (1).

8. A miniaturized highly integrated photovoltaic inverter according to claim 7, characterized in that: The inverter housing (1) has an integrated intelligent heat dissipation system, which can adjust the rotation speed of the heat dissipation fan (21) in the heat dissipation component (19) and the working state of the fixed fan (13) in real time according to the temperature inside the inverter, so as to ensure that the inverter maintains an optimal working temperature while operating efficiently.

9. The miniaturized highly integrated photovoltaic inverter according to claim 1, characterized in that: The inverter also has a fault warning and self-repair mechanism. When an abnormality occurs in the rectifier (12), filter (14) or main control board (7) of the inverter's internal components, the system can automatically detect and trigger a warning signal, while attempting to perform simple self-repair operations, such as restarting the relevant modules or adjusting the working state, to reduce downtime and improve system reliability.

10. The miniaturized highly integrated photovoltaic inverter according to claim 1, characterized in that: The inverter is internally integrated with an intelligent fault location and diagnosis system. When a fault occurs in the inverter, the system can automatically detect the fault point and send detailed fault information and diagnostic suggestions to the user via a display screen (2) or a wireless communication interface.

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