Array type photovoltaic inverter capable of automatically switching output voltage

Abstract

The invention discloses an array type photovoltaic inverter capable of automatically switching output voltage. The array type photovoltaic inverter comprises an illumination sensor group used for detecting illumination intensity received by a photovoltaic array; the data processing unit is used for determining an illumination intensity grade; the control logic circuit controls the switching of the output voltage according to the illumination intensity level; the voltage selection switch is switched to the corresponding voltage conversion sub-module according to an instruction of the control logic circuit; the output voltage stabilizing circuit is used for ensuring the stability of the output voltage; the load matching network is used for adjusting output characteristics according to load changes to maintain efficiency; the feedback loop is used for monitoring the load state and feeding back information to the data processing unit; and the data processing unit calls an algorithm to adjust the output voltage according to the illumination intensity level and the load state information. The output voltage can be automatically adjusted according to the real-time illumination intensity grade and the load state, the overall conversion efficiency of the photovoltaic system is remarkably improved, and the operation stability of the system is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic inverters, and in particular relates to an array-type photovoltaic inverter with self-switching output voltage. Background Art

[0002] With the widespread application of renewable energy, the efficiency and reliability of photovoltaic systems have become the focus of research. Traditional photovoltaic inverters often use fixed output voltage settings, which leads to a decrease in system efficiency under different lighting conditions. Especially when lighting conditions change frequently, the inverter needs to be able to quickly and accurately adjust the output voltage to maintain a high energy conversion efficiency.

[0003] Existing photovoltaic inverters are unable to efficiently and stably adaptively adjust the output voltage under different lighting conditions, resulting in low energy conversion efficiency. Summary of the invention

[0004] The object of the present invention is to provide an array-type photovoltaic inverter with self-switching output voltage, which can automatically adjust the output voltage according to the real-time light intensity level and load status, thereby significantly improving the overall conversion efficiency of the photovoltaic system and ensuring the stability of the system operation, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an array-type photovoltaic inverter with self-switching output voltage, comprising: a light sensor group for detecting the light intensity received by the photovoltaic array; a data processing unit connected to the light sensor group and used to receive and process data from the light sensor group to determine the light intensity level; a control logic circuit connected to the data processing unit and controlling the switching of the output voltage according to the light intensity level information provided by the data processing unit; a multi-level voltage conversion module connected to the control logic circuit and comprising a plurality of switchable voltage conversion sub-modules, each sub-module corresponding to a different output voltage level; a voltage selection switch connected to the multi-level A voltage conversion module is connected and switches to the corresponding voltage conversion submodule according to the instruction of the control logic circuit; an output voltage stabilizing circuit is connected to the voltage selection switch to ensure the stability of the output voltage; a load matching network is connected to the output voltage stabilizing circuit to adjust the output characteristics according to the load change to maintain the efficiency; a feedback loop is connected to the load matching network and the data processing unit to monitor the load state and feed back the information to the data processing unit; a dynamic adjustment algorithm memory is connected to the data processing unit and stores the dynamic adjustment algorithm, and the data processing unit calls the dynamic adjustment algorithm to adjust the output voltage according to the light intensity level and the load state information.

[0006] Preferably, the light sensor group includes: a plurality of distributed photosensitive elements, distributed in different areas of the photovoltaic array, for detecting the light intensity in their respective areas; an analog signal amplifier, connected to the plurality of distributed photosensitive elements, for amplifying the analog signals generated by the photosensitive elements; an analog-to-digital converter, connected to the analog signal amplifier, for converting the amplified analog signals into digital signals; and a signal integration module, connected to the analog-to-digital converter, for collecting and integrating all digital signals to form a complete light intensity distribution map.

[0007] Preferably, the data processing unit includes: a receiving interface connected to the light sensor group, for receiving a digital signal sent by the light sensor group; a data analysis module connected to the receiving interface, for analyzing the digital signal to extract light intensity information; an intensity level mapping table connected to the data analysis module, for determining a corresponding light intensity level according to the light intensity information; and a level output port connected to the intensity level mapping table, for outputting the light intensity level information.

[0008] Preferably, the control logic circuit includes: an input decoder connected to the data processing unit, for receiving and decoding the light intensity level information; a voltage level mapping table connected to the input decoder, for determining the corresponding output voltage level according to the decoded light intensity level information; a voltage switching controller connected to the voltage level mapping table, for controlling the switching of the output voltage according to the output voltage level; and an output drive circuit connected to the voltage switching controller, for driving the multi-stage voltage conversion module to achieve output voltage switching.

[0009] Preferably, the multi-level voltage conversion module includes: a high voltage conversion submodule, connected to the control logic circuit, and used to provide a higher voltage output at a high light intensity level; a medium voltage conversion submodule, connected to the control logic circuit, and used to provide a medium voltage output at a medium light intensity level; a low voltage conversion submodule, connected to the control logic circuit, and used to provide a lower voltage output at a low light intensity level; and a submodule selection circuit, connected to the control logic circuit, and used to select and activate the corresponding voltage conversion submodule according to the instructions of the control logic circuit.

[0010] Preferably, the voltage selection switch includes: a selection signal receiver connected to the control logic circuit and used to receive a voltage selection instruction issued by the control logic circuit; a multiplexer connected to the selection signal receiver and used to select and activate a corresponding voltage conversion sub-module according to the selection instruction; a switch control circuit connected to the multiplexer and used to control the working state of the multiplexer; and a switch actuator connected to the switch control circuit and used to execute the switch instruction issued by the switch control circuit to realize the selection switching of the voltage conversion sub-module.

[0011] Preferably, the output voltage stabilization circuit includes: a voltage detection unit connected to the voltage selection switch, for detecting the voltage value output by the voltage selection switch; a feedback comparator connected to the voltage detection unit, for comparing the detected voltage value with a preset reference voltage value; an error amplifier connected to the feedback comparator, for amplifying the voltage error signal generated by the feedback comparator; and an adjustment circuit connected to the error amplifier, for adjusting the output voltage of the voltage selection switch according to the error signal to achieve stability.

[0012] Preferably, the load matching network includes: a load detection unit connected to the output voltage stabilization circuit, used to detect changes in the load; a dynamic impedance matcher connected to the load detection unit, used to adjust the output impedance according to changes in the load to achieve optimal matching; an efficiency optimization module connected to the dynamic impedance matcher, used to optimize the output efficiency according to the adjustment result of the dynamic impedance matcher; an output characteristic regulator connected to the efficiency optimization module, used to adjust the output characteristics according to the instructions of the efficiency optimization module to maintain system efficiency.

[0013] Preferably, the feedback loop includes: a load state detector connected to the load matching network and used to detect the state of the load in real time; a signal conditioner connected to the load state detector and used to condition the information detected by the load state detector to make it suitable for transmission; a signal transmitter connected to the signal conditioner and used to send the conditioned signal to the data processing unit; a signal receiver connected to the data processing unit and used to receive the signal sent by the signal transmitter and provide it to the data processing unit.

[0014] Preferably, the dynamic adjustment algorithm memory includes: an algorithm storage module, connected to the data processing unit, for storing the dynamic adjustment algorithm; an algorithm retriever, connected to the algorithm storage module, for retrieving the required dynamic adjustment algorithm according to the instructions of the data processing unit; a parameter updater, connected to the algorithm retriever, for updating the parameters in the dynamic adjustment algorithm according to the light intensity level and the load status information; an algorithm application interface, connected to the parameter updater, for providing the updated dynamic adjustment algorithm to the data processing unit to adjust the output voltage.

[0015] Technical effects and advantages of the present invention: Compared with the prior art, the array-type photovoltaic inverter with self-switching output voltage proposed by the present invention has the following advantages:

[0016] The present invention proposes an array-type photovoltaic inverter with self-switching output voltage, aiming to solve the above technical problems. By integrating a light sensor group, a data processing unit, a control logic circuit, a multi-level voltage conversion module, a voltage selection switch, an output voltage stabilization circuit, a load matching network, a feedback loop, and a dynamic adjustment algorithm memory, the present invention can automatically adjust the output voltage according to the real-time light intensity level and load status, thereby significantly improving the overall conversion efficiency of the photovoltaic system and ensuring the stability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A block diagram of an array-type photovoltaic inverter with self-switching output voltage according to the present invention;

[0018] Figure 2 is a block diagram of a light sensor group of the present invention;

[0019] Figure 3 is a block diagram of a data processing unit of the present invention;

[0020] Figure 4 is a block diagram of a control logic circuit of the present invention;

[0021] Figure 5 is a block diagram of a multi-level voltage conversion module of the present invention;

[0022] Figure 6 A block diagram of a voltage selection switch of the present invention;

[0023] Figure 7 A block diagram of an output voltage stabilizing circuit of the present invention;

[0024] Figure 8 is a block diagram of a load matching network of the present invention;

[0025] Fig. 9 is a block diagram of a feedback loop of the present invention;

[0026] Fig.10 A block diagram of the dynamic adjustment algorithm memory of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] The present invention provides Figure 1 The array-type photovoltaic inverter with self-switching output voltage shown in the figure includes: aiming to solve the above technical problems. By integrating a light sensor group, a data processing unit, a control logic circuit, a multi-level voltage conversion module, a voltage selection switch, an output voltage stabilization circuit, a load matching network, a feedback loop and a dynamic adjustment algorithm memory, the present invention can automatically adjust the output voltage according to the real-time light intensity level and load status, thereby significantly improving the overall conversion efficiency of the photovoltaic system and ensuring the stability of the system operation.

[0029] In a further preferred embodiment, Figure 2 As shown, the light sensor group is used to detect the light intensity received by the photovoltaic array; specifically, the design and layout of the light sensor group are as follows:

[0030] Sensor selection: Use high-precision light sensors to ensure that the detected light intensity data is accurate and reliable.

[0031] Distribution method: Multiple light sensors are evenly distributed at different locations of the photovoltaic array to capture the changes in light received by the entire photovoltaic array.

[0032] Quantity determination: According to the area and layout of the photovoltaic array, the number of light sensors should be reasonably configured to ensure coverage of the entire photovoltaic array area.

[0033] 2. Data collection and transmission

[0034] Signal conversion: The light sensor converts the detected light intensity into an electrical signal.

[0035] Signal Amplification: Enhance signal strength through built-in or external analog signal amplifier.

[0036] Signal digitization: Use an analog-to-digital converter to convert analog signals into digital signals for subsequent processing.

[0037] Signal transmission: Transmit digital signals to the data processing unit wirelessly or wiredly.

[0038] 3. Data processing and application

[0039] Data integration: The data processing unit receives digital signals from each sensor and integrates them into a comprehensive light intensity distribution map.

[0040] Light intensity level determination: Determine the current light intensity level based on the integrated data.

[0041] Feedback mechanism: Feedback the light intensity level information to the control logic circuit to initiate the corresponding output voltage adjustment strategy.

[0042] Through the above specific embodiments, the light sensor group can accurately detect the light intensity received by the photovoltaic array and transmit the data to the data processing unit, thereby providing basic data support for the subsequent output voltage adaptive adjustment.

[0043] The light sensor group includes: multiple distributed photosensitive elements, distributed in different areas of the photovoltaic array, for detecting the light intensity in their respective areas; an analog signal amplifier connected to the multiple distributed photosensitive elements, for amplifying the analog signals generated by the photosensitive elements; an analog-to-digital converter connected to the analog signal amplifier, for converting the amplified analog signals into digital signals; a signal integration module connected to the analog-to-digital converter, for collecting and integrating all digital signals to form a complete light intensity distribution map.

[0044] Multiple distributed photosensitive elements are used to detect the light intensity in different areas, and subsequent signal processing steps are used to ensure that these signals can be accurately collected and processed.

[0045] In a further preferred embodiment, Figure 3 As shown, the data processing unit is connected to the light sensor group and is used to receive and process data from the light sensor group to determine the light intensity level;

[0046] Furthermore, the data processing unit includes: a receiving interface connected to the light sensor group, for receiving the digital signal sent by the light sensor group; a data analysis module connected to the receiving interface, for analyzing the digital signal to extract light intensity information; an intensity level mapping table connected to the data analysis module, for determining the corresponding light intensity level according to the light intensity information; and a level output port connected to the intensity level mapping table, for outputting the light intensity level information.

[0047] The digital signals are received through the receiving interface, and then parsed by the data parsing module to extract the light intensity information, and finally the light intensity level is determined through the intensity level mapping table.

[0048] In a further preferred embodiment, Figure 4As shown, the control logic circuit is connected to the data processing unit, and controls the switching of the output voltage according to the light intensity level information provided by the data processing unit;

[0049] Furthermore, the control logic circuit includes: an input decoder connected to the data processing unit, for receiving and decoding light intensity level information; a voltage level mapping table connected to the input decoder, for determining the corresponding output voltage level according to the decoded light intensity level information; a voltage switching controller connected to the voltage level mapping table, for controlling the switching of the output voltage according to the output voltage level; and an output drive circuit connected to the voltage switching controller, for driving a multi-stage voltage conversion module to achieve output voltage switching.

[0050] The light intensity level information is received and decoded through the input decoder, and then the corresponding output voltage level is determined through the voltage level mapping table. Finally, the actual switching of the output voltage is realized through the voltage switching controller and the output driving circuit.

[0051] In a further preferred embodiment, Figure 5 As shown, the multi-level voltage conversion module is connected to the control logic circuit and includes a plurality of switchable voltage conversion sub-modules, each sub-module corresponding to a different output voltage level;

[0052] Furthermore, the multi-level voltage conversion module includes: a high voltage conversion submodule connected to the control logic circuit, for providing a higher voltage output at a high light intensity level; a medium voltage conversion submodule connected to the control logic circuit, for providing a medium voltage output at a medium light intensity level; a low voltage conversion submodule connected to the control logic circuit, for providing a lower voltage output at a low light intensity level; and a submodule selection circuit connected to the control logic circuit, for selecting and activating the corresponding voltage conversion submodule according to the instructions of the control logic circuit.

[0053] Different light intensity levels are adapted through three conversion submodules with different voltage levels, and adaptive adjustment of the output voltage is achieved through a submodule selection circuit.

[0054] In a further preferred embodiment, Figure 6 As shown, the voltage selection switch is connected to the multi-stage voltage conversion module and switches to the corresponding voltage conversion submodule according to the instruction of the control logic circuit; in order to illustrate this embodiment in more detail, the following is a description of the specific implementation of the voltage selection switch.

[0055] 1. Design of voltage selection switch

[0056] Switch Type: High-speed electronic switches such as field effect transistors (FETs) or insulated gate bipolar transistors (IGBTs) are used to achieve fast response and low-loss switching.

[0057] Control interface: Design a control interface that is compatible with the control logic circuit to ensure that it can receive and understand instructions from the control logic circuit.

[0058] 2. Layout of multi-level voltage conversion modules

[0059] Module division: Divide the multi-level voltage conversion module into several voltage conversion sub-modules, each sub-module corresponding to a different output voltage level.

[0060] Module connection: Each voltage conversion submodule is connected to the voltage selection switch through a dedicated output port to ensure that it can be connected or disconnected independently.

[0061] 3. Switching process

[0062] Command reception: The voltage selection switch receives the switching command issued by the control logic circuit.

[0063] Instruction parsing: Parse the instruction to determine which voltage conversion submodule needs to be activated.

[0064] Submodule selection: Select the corresponding voltage conversion submodule according to the instruction, and activate the selected submodule through the switch control circuit.

[0065] Switching execution: The selection and switching of the voltage conversion submodule is completed through the switch actuator to ensure that the output voltage can quickly respond to changes in light intensity levels.

[0066] 4. Security and stability

[0067] Overload protection: The device is designed with an overload protection mechanism to ensure that the power supply is automatically cut off in the event of an overload to prevent damage.

[0068] Thermal management: Considering that high-speed electronic switches will generate heat during operation, effective heat dissipation measures are designed to ensure long-term and stable operation of the equipment.

[0069] Through the above specific embodiments, the voltage selection switch can accurately switch to the corresponding voltage conversion submodule according to the instruction of the control logic circuit, ensuring that the inverter can efficiently and stably adaptively adjust the output voltage under different lighting conditions.

[0070] Furthermore, the voltage selection switch includes: a selection signal receiver connected to the control logic circuit, for receiving a voltage selection instruction issued by the control logic circuit; a multiplexer connected to the selection signal receiver, for selecting and activating a corresponding voltage conversion sub-module according to the selection instruction; a switch control circuit connected to the multiplexer, for controlling the working state of the multiplexer; and a switch actuator connected to the switch control circuit, for executing a switch instruction issued by the switch control circuit to realize the selection switching of the voltage conversion sub-module.

[0071] The signal receiver is selected to receive the instruction sent by the control logic circuit, and then the selection and switching of the corresponding submodules in the multi-level voltage conversion module are realized through the multiplexer, the switch control circuit and the switch actuator.

[0072] In a further preferred embodiment, Figure 7 As shown, the output voltage stabilizing circuit is connected to the voltage selection switch to ensure the stability of the output voltage;

[0073] Furthermore, the output voltage stabilization circuit includes: a voltage detection unit connected to the voltage selection switch, for detecting the voltage value output by the voltage selection switch; a feedback comparator connected to the voltage detection unit, for comparing the detected voltage value with a preset reference voltage value; an error amplifier connected to the feedback comparator, for amplifying the voltage error signal generated by the feedback comparator; and an adjustment circuit connected to the error amplifier, for adjusting the output voltage of the voltage selection switch according to the error signal to achieve stability.

[0074] The voltage value output by the voltage selection switch is detected by a voltage detection unit, and then the output voltage is stably controlled by a feedback comparator, an error amplifier and an adjustment circuit.

[0075] In a further preferred embodiment, Figure 8 As shown, the load matching network is connected to the output voltage regulation circuit to adjust the output characteristics according to the load change to maintain the efficiency;

[0076] Furthermore, the load matching network includes: a load detection unit connected to the output voltage stabilization circuit for detecting changes in the load; a dynamic impedance matcher connected to the load detection unit for adjusting the output impedance according to changes in the load to achieve optimal matching; an efficiency optimization module connected to the dynamic impedance matcher for optimizing the output efficiency according to the adjustment result of the dynamic impedance matcher; an output characteristic regulator connected to the efficiency optimization module for adjusting the output characteristics according to the instructions of the efficiency optimization module to maintain system efficiency.

[0077] The load detection unit detects the load change, and then the dynamic impedance matcher, efficiency optimization module and output characteristic regulator are used to dynamically adjust the output characteristics to ensure that high efficiency can be maintained under different load conditions.

[0078] In a further preferred embodiment, Fig. 9 As shown, the feedback loop is connected to the load matching network and the data processing unit to monitor the load status and feed back the information to the data processing unit;

[0079] Furthermore, the feedback loop includes: a load state detector connected to a load matching network for detecting the state of the load in real time; a signal conditioner connected to the load state detector for conditioning the information detected by the load state detector to suit transmission; a signal transmitter connected to the signal conditioner for sending the conditioned signal to a data processing unit; a signal receiver connected to the data processing unit for receiving the signal sent by the signal transmitter and providing it to the data processing unit.

[0080] The load status is detected in real time by the load status detector, and then the load status information is effectively transmitted through the signal conditioner, signal transmitter and signal receiver, thereby ensuring that the data processing unit can obtain the load status information in time for processing.

[0081] In a further preferred embodiment, Fig.10 As shown, the dynamic adjustment algorithm memory is connected to the data processing unit and stores the dynamic adjustment algorithm. The data processing unit calls the dynamic adjustment algorithm to adjust the output voltage according to the light intensity level and load status information.

[0082] Furthermore, the dynamic adjustment algorithm memory includes: an algorithm storage module connected to the data processing unit, for storing the dynamic adjustment algorithm; an algorithm retriever connected to the algorithm storage module, for retrieving the required dynamic adjustment algorithm according to the instructions of the data processing unit; a parameter updater connected to the algorithm retriever, for updating the parameters in the dynamic adjustment algorithm according to the light intensity level and load status information; and an algorithm application interface connected to the parameter updater, for providing the updated dynamic adjustment algorithm to the data processing unit to adjust the output voltage.

[0083] The dynamic adjustment algorithm is stored in the algorithm storage module, and then the algorithm is retrieved, the parameters are updated, and the updated algorithm is provided to the data processing unit through the algorithm retriever, the parameter updater and the algorithm application interface to ensure that the output voltage can be dynamically adjusted according to the light intensity level and the load status information.

[0084] The dynamic adjustment algorithm memory is connected to the data processing unit and is used to store the dynamic adjustment algorithm. To explain this embodiment in more detail, the following is a description of a specific implementation of the dynamic adjustment algorithm memory.

[0085] 1. Design of dynamic adjustment algorithm memory

[0086] Algorithm storage: Choose non-volatile memory, such as flash memory, to store the dynamically adjusted algorithm to ensure that the algorithm is saved even in the event of a power outage.

[0087] Capacity planning: Based on the complexity of the algorithm and the expected update frequency, reasonably plan the capacity of the memory to ensure sufficient storage space.

[0088] 2. Algorithm retrieval and application

[0089] Algorithm retrieval: After the data processing unit receives the light intensity level and load status information, it retrieves the corresponding dynamic adjustment algorithm from the dynamic adjustment algorithm memory according to the information.

[0090] Parameter update: The algorithm retriever can update the parameters in the dynamic adjustment algorithm according to the real-time light intensity level and load status information to adapt to different working environments.

[0091] Algorithm application: The updated dynamic adjustment algorithm is provided to the data processing unit through the algorithm application interface for adjusting the output voltage.

[0092] 3. Implementation of dynamic adjustment algorithm

[0093] Algorithm structure: The dynamic adjustment algorithm determines the optimal output voltage level based on light intensity level and load status information through mathematical models or table lookup methods.

[0094] Adaptive adjustment: The algorithm has self-learning capabilities and can continuously optimize itself based on historical data to better adapt to various lighting and load conditions that may be encountered in the future.

[0095] Safety assurance: The algorithm also takes into account overload protection and anomaly detection mechanisms to ensure that the output voltage can be safely adjusted under any circumstances.

[0096] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An array-type photovoltaic inverter with self-switching output voltage, It is characterized in that include: a light sensor group for detecting the light intensity received by the photovoltaic array; a data processing unit connected to the light sensor group, for receiving and processing data from the light sensor group to determine a light intensity level; a control logic circuit connected to the data processing unit and controlling the switching of the output voltage according to the light intensity level information provided by the data processing unit; a multi-level voltage conversion module, connected to the control logic circuit, comprising a plurality of switchable voltage conversion submodules, each submodule corresponding to a different output voltage level; a voltage selection switch connected to the multi-stage voltage conversion module and switching to a corresponding voltage conversion submodule according to an instruction of the control logic circuit; an output voltage stabilizing circuit, connected to the voltage selection switch, for ensuring the stability of the output voltage; a load matching network connected to the output voltage stabilizing circuit for adjusting output characteristics according to load changes to maintain efficiency; a feedback loop connected to the load matching network and the data processing unit, for monitoring the load status and feeding back information to the data processing unit; A dynamic adjustment algorithm memory is connected to the data processing unit and stores a dynamic adjustment algorithm. The data processing unit calls the dynamic adjustment algorithm to adjust the output voltage according to the light intensity level and the load status information.

2. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The light sensor group comprises: Multiple distributed photosensitive elements are distributed in different areas of the photovoltaic array to detect the light intensity in their respective areas; an analog signal amplifier, connected to the plurality of distributed photosensitive elements, and used to amplify the analog signals generated by the photosensitive elements; an analog-to-digital converter, connected to the analog signal amplifier, and configured to convert the amplified analog signal into a digital signal; The signal integration module is connected to the analog-to-digital converter and is used to collect and integrate all digital signals to form a complete light intensity distribution diagram.

3. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The data processing unit comprises: A receiving interface, connected to the light sensor group, and used to receive a digital signal sent by the light sensor group; A data analysis module, connected to the receiving interface, for analyzing the digital signal to extract light intensity information; an intensity level mapping table, connected to the data analysis module, and used to determine the corresponding light intensity level according to the light intensity information; The level output port is connected to the intensity level mapping table and is used to output the light intensity level information.

4. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The control logic circuit comprises: An input decoder, connected to the data processing unit, for receiving and decoding the light intensity level information; a voltage level mapping table, connected to the input decoder, for determining a corresponding output voltage level according to the decoded light intensity level information; A voltage switching controller, connected to the voltage level mapping table, for controlling the switching of the output voltage according to the output voltage level; The output driving circuit is connected to the voltage switching controller and is used to drive the multi-stage voltage conversion module to achieve output voltage switching.

5. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The multi-level voltage conversion module comprises: A high voltage conversion submodule, connected to the control logic circuit, for providing a higher voltage output at a high light intensity level; A medium voltage conversion submodule, connected to the control logic circuit, for providing a medium voltage output at a medium light intensity level; A low voltage conversion submodule, connected to the control logic circuit, for providing a lower voltage output at a low light intensity level; The submodule selection circuit is connected to the control logic circuit and is used to select and activate the corresponding voltage conversion submodule according to the instruction of the control logic circuit.

6. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The voltage selection switch comprises: A selection signal receiver, connected to the control logic circuit, for receiving a voltage selection instruction issued by the control logic circuit; A multiplexer, connected to the selection signal receiver, and configured to select and activate a corresponding voltage conversion submodule according to the selection instruction; A switch control circuit, connected to the multiplexer, and used to control the working state of the multiplexer; The switch actuator is connected to the switch control circuit and is used to execute the switch instruction issued by the switch control circuit to realize the selection and switching of the voltage conversion submodule.

7. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The output voltage stabilizing circuit comprises: A voltage detection unit, connected to the voltage selection switch, and used to detect the voltage value output by the voltage selection switch; a feedback comparator, connected to the voltage detection unit, and used to compare the detected voltage value with a preset reference voltage value; an error amplifier, connected to the feedback comparator, and used to amplify the voltage error signal generated by the feedback comparator; The adjustment circuit is connected to the error amplifier and is used to adjust the output voltage of the voltage selection switch according to the error signal to achieve stability.

8. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The load matching network comprises: A load detection unit, connected to the output voltage stabilization circuit, for detecting changes in the load; A dynamic impedance matcher, connected to the load detection unit, for adjusting the output impedance according to the change of the load to achieve optimal matching; an efficiency optimization module, connected to the dynamic impedance matcher, and configured to optimize the output efficiency according to the adjustment result of the dynamic impedance matcher; The output characteristic regulator is connected to the efficiency optimization module and is used to adjust the output characteristic according to the instruction of the efficiency optimization module to maintain the system efficiency.

9. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The feedback loop includes: A load state detector, connected to the load matching network, for detecting the state of the load in real time; a signal conditioner connected to the load state detector and used to condition the information detected by the load state detector to be suitable for transmission; a signal transmitter, connected to the signal conditioner, and used to send the conditioned signal to the data processing unit; A signal receiver is connected to the data processing unit and is used to receive the signal sent by the signal transmitter and provide the signal to the data processing unit.

10. The array-type photovoltaic inverter with self-switching output voltage according to claim 1, Features: The dynamic adjustment algorithm memory comprises: An algorithm storage module, connected to the data processing unit, and used to store a dynamic adjustment algorithm; an algorithm retriever, connected to the algorithm storage module, for retrieving a required dynamic adjustment algorithm according to an instruction of the data processing unit; a parameter updater, connected to the algorithm retriever, for updating parameters in the dynamic adjustment algorithm according to the light intensity level and the load state information; An algorithm application interface is connected to the parameter updater and is used to provide an updated dynamic adjustment algorithm to the data processing unit to adjust the output voltage.

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