Control method for component-level power electronic apparatus, apparatus and photovoltaic system

Abstract

Disclosed in the present application are a control method for a component-level power electronic apparatus, an apparatus and a photovoltaic system. The component-level power electronic apparatus comprises a control module and a DCDC circuit module. The control module is connected to the DCDC circuit module, and the control module is used for adjusting the duty ratio of the DCDC circuit module. The soft turn-off control method comprises: on the basis of an input signal, the control module generates a soft turn-off signal; and the DCDC circuit module executes the soft turn-off signal, and gradually decreases the duty ratio of the DCDC circuit module within a first preset time, so as to control an electrical signal output by the DCDC circuit module to gradually decrease until the soft turn-off is completed. The technical solution provided in the embodiments of the present application reduces the impact generated when DCDC circuits are turned off.

Description

A control method, apparatus, and photovoltaic system for a component-level power electronic device.

[0001] This application claims priority to Chinese Patent Application No. 202411020314.8, filed with the Chinese Patent Office on July 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of photovoltaic power generation technology, and in particular to a control method, apparatus and photovoltaic system for a component-level power electronic device. Background Technology

[0003] With the increasing popularity of new energy power generation equipment, photovoltaic power generation, as a green and pollution-free power source, has been widely used, leading to the rapid development of photovoltaic power generation systems.

[0004] In photovoltaic power generation systems, DC-DC circuits are widely used for voltage conversion and power management in module-level power electronic devices. When the system needs to be shut down or a fault occurs, the relevant technologies usually disconnect the DC-DC circuit immediately. This shutdown method causes a momentary drop in output voltage and current, which has a significant impact on the DC-DC circuit itself and other components of the system, resulting in low system safety and poor reliability. Summary of the Invention

[0005] This application provides a control method, apparatus, and photovoltaic system for a component-level power electronic device to solve the problem of large impacts caused by the turn-off of DC-DC circuits.

[0006] According to one aspect of this application, a control method for a component-level power electronic device is provided, the component-level power electronic device including a control module and a DC-DC circuit module; the control module is connected to the DC-DC circuit module, and the control module is used to adjust the duty cycle of the DC-DC circuit module;

[0007] The control method for the component-level power electronic device includes:

[0008] The control module generates a soft shutdown signal based on the input signal;

[0009] The DC-DC circuit module executes the soft shutdown signal and gradually reduces the duty cycle of the DC-DC circuit module within a first preset time period to control the output electrical signal of the DC-DC circuit module to gradually decrease until the soft shutdown is completed.

[0010] Optionally, the control method for component-level power electronic devices further includes:

[0011] The control module generates a hard shutdown signal based on the input signal; wherein the input signal for generating the hard shutdown signal is different from the input signal for generating the soft shutdown signal.

[0012] Optionally, the component-level power electronic device further includes a detection module connected to the control module, the detection module being used to detect the operating status of the component-level power electronic device; the operating status includes temperature status;

[0013] The control module generates a soft shutdown signal based on the input signal, specifically including:

[0014] The control module acquires the temperature status, and generates the soft shutdown signal when the temperature status exceeds the set temperature threshold.

[0015] Optionally, the operating state further includes a voltage state and / or a current state; the control method further includes:

[0016] The control module acquires the voltage state and / or the current state. When the voltage state exceeds a set voltage threshold, the control module generates a hard shutdown signal; or, when the current state exceeds a set current threshold, the control module generates the hard shutdown signal.

[0017] Optionally, after the control module generates the hard shutdown signal, it further includes:

[0018] The DC-DC circuit module executes the hard shutdown signal, reducing its output current and voltage signals to 0 within a second preset time until the hard shutdown is completed; the second preset time is less than the first preset time.

[0019] Optionally, the step of gradually reducing the duty cycle of the DC-DC circuit module within a first preset time period to control the output electrical signal of the DC-DC circuit module to gradually decrease until soft shutdown is completed includes:

[0020] The current and voltage signals output by the DC-DC circuit module gradually decrease to 0, thus completing the soft shutdown.

[0021] Optionally, the component-level power electronic device further includes a communication module, which is connected to the control module and is used to transmit command signals from the back-end equipment.

[0022] The input signals of the control module include status signals and command signals.

[0023] Optionally, the command signal includes: a hard shutdown command signal and a soft shutdown command signal;

[0024] If the instruction signal is the hard shutdown instruction signal, then the control module controls the DC-DC circuit module to execute the hard shutdown instruction signal;

[0025] If the instruction signal is the soft shutdown instruction signal, then the control module controls the DC-DC circuit module to execute the soft shutdown instruction signal.

[0026] Optionally, the component-level power electronic device includes at least one of a photovoltaic optimizer and a photovoltaic controller.

[0027] According to another aspect of this application, a component-level power electronic device is provided, employing the control method for component-level power electronic devices as described in any embodiment.

[0028] Optionally, the component-level power electronic device further includes a detection module connected to the control module, the detection module comprising:

[0029] Temperature detection unit, current detection unit, and voltage detection unit;

[0030] The temperature detection unit, the current detection unit, and the voltage detection unit are all connected to the control module;

[0031] The temperature detection unit is used to detect the internal temperature of the component-level power electronic device;

[0032] The current detection unit is used to detect the input current and output current of the component-level power electronic device;

[0033] The voltage detection unit is used to detect the input voltage and output voltage of the component-level power electronic device.

[0034] Optionally, the component-level power electronic device further includes a communication module; the communication module includes: an electronic carrier communication unit;

[0035] The electronic carrier communication unit is connected to the control module, and the electronic carrier communication unit is used to transmit command signals of the back-end equipment and / or photovoltaic system.

[0036] According to another aspect of this application, a photovoltaic system is provided, comprising: a component-level power electronic device as described in any embodiment.

[0037] The technical solution provided in this application provides a novel control method for component-level power electronic devices. This method introduces a soft-shutdown approach when turning off the component-level power electronic device. Specifically, different shutdown methods can be executed according to different states of the component-level power electronic device, offering high flexibility and safety. However, in related technologies, when turning off component-level power electronic devices, a hard shutdown is used immediately to quickly disconnect dangerous situations. While this shutdown method is simple, it causes a sudden drop in output voltage and current during shutdown, which may impact the component-level power electronic device and other connected electrical components, leading to other adverse effects. Therefore, compared with related technologies, the embodiments of this application offer higher safety and reliability. Furthermore, the soft-shutdown method provided in this application achieves soft shutdown of the component-level power electronic device by adjusting the duty cycle of the DC-DC circuit module. This shutdown method allows the electrical signal output by the DC-DC circuit module to gradually decrease, thereby reducing the impact on the component-level power electronic device and other connected electrical components during shutdown, extending the service life of the component-level power electronic device, and offering easily achievable benefits.

[0038] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 is a schematic diagram of a component-level power electronic device according to an embodiment of this application;

[0041] Figure 2 is a schematic diagram of another component-level power electronic device provided according to an embodiment of this application;

[0042] Figure 3 is a schematic diagram of the structure of another component-level power electronic device according to an embodiment of this application;

[0043] Figure 4 is a flowchart of a control method for a component-level power electronic device according to an embodiment of this application;

[0044] Figure 5 is a flowchart of another control method for a component-level power electronic device provided according to an embodiment of this application. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] This application provides a component-level power electronic device. Figure 1 is a schematic diagram of the structure of a component-level power electronic device provided in this application. Referring to Figure 1, the component-level power electronic device 10 includes a control module 1 and a DC-DC circuit module 2; the control module 1 is connected to the DC-DC circuit module 2, and the control module 1 is used to adjust the duty cycle of the DC-DC circuit module 2.

[0048] The component-level power electronic device provided in this application embodiment can employ the control method of the component-level power electronic device provided in any embodiment of this application. For example, the component-level power electronic device 10 can perform hard shutdown or soft shutdown according to its own operating state or received command signals. When the component-level power electronic device 10 needs to perform soft shutdown, the control module 1 adjusts the duty cycle of the DC-DC circuit module 2 and gradually reduces it. When the duty cycle of the DC-DC circuit module 2 drops to 0 and the current or voltage output by the DC-DC circuit module 2 also drops to 0, the soft shutdown of the component-level power electronic device is completed. The soft shutdown process of the component-level power electronic device 10 is a process of gradually reducing the current and voltage output by the DC-DC circuit module 2. This shutdown method allows the current and voltage output by the DC-DC circuit module 2 to decrease smoothly, thereby reducing the impact on the DC-DC circuit module 2 and other internal components when the component-level power electronic device 10 is turned off, resulting in higher reliability. When the component-level power electronic device 10 needs to be hard-shut down, it indicates that the component-level power electronic device 10 or the externally connected electrical components may have failed. At this time, the control module 1 controls the output electrical signal of the DC-DC circuit module 2 to be instantly reduced to 0, so that the component-level power electronic device 10 can quickly clear the fault and improve the operational safety of the component-level power electronic device 10.

[0049] Referring again to Figure 1, based on the above embodiments, optionally, the component-level power electronic device 10 further includes a detection module 3. The detection module 3 is connected to the control module 1, and the detection module 3 is used to detect the operating status of the component-level power electronic device 10; the operating status includes the temperature status. The control module 1 generates a soft shutdown signal based on the input signal, specifically by: the control module 1 acquiring the temperature status, and generating a soft shutdown signal when the temperature status exceeds a set temperature threshold.

[0050] The detection module 3 detects the internal temperature of the component-level power electronic device 10 and inputs it into the control module 1. When the internal temperature exceeds a set temperature threshold, it indicates that the component-level power electronic device 10 is in an overheated state. To prevent the internal components of the component-level power electronic device 10 from burning out due to overheating, the control module 1 generates a soft-shutdown signal to control the DC-DC circuit module 2 to perform a soft shutdown. This configuration not only provides temperature protection for the component-level power electronic device 10 but also avoids the adverse effects of a sudden drop in electrical signal on the component-level power electronic device 10 during shutdown.

[0051] Figure 2 is a schematic diagram of another component-level power electronic device provided in an embodiment of this application. Referring to Figure 2, based on the above embodiments, the component-level power electronic device 10 may optionally include a communication module 4. The communication module 4 is connected to the control module 1 and is used to transmit command signals from the back-end device 20. The input signals of the control module 1 include status signals and command signals.

[0052] The detection module 3 detects the operating status of the component-level power electronic device 10 and generates status signals that reflect the temperature, voltage, and current status of the power electronic device 10. The communication module 4 is connected to the back-end device 20 outside the component-level power electronic device 10, and can receive command signals from the back-end device 20 and input them into the control module 1. The control module 1 controls the DC-DC circuit module 2 to perform hard shutdown or soft shutdown according to the command signals.

[0053] Based on the above embodiments, optionally, the command signal includes: a hard shutdown command signal and a soft shutdown command signal. If the command signal is a hard shutdown command signal, the control module controls the DC-DC circuit module to execute the hard shutdown command signal. If the command signal is a soft shutdown command signal, the control module controls the DC-DC circuit module to execute the soft shutdown command signal.

[0054] For example, the soft shutdown command signal may include a maintenance signal issued by the back-end device 20. In this case, there is no need to urgently shut down the component-level power electronic device 10, and the control module 1 can control the DC-DC circuit module 2 to perform a soft shutdown according to the soft shutdown command signal. The hard shutdown command signal may include an emergency stop signal issued by the back-end device 20, and the control module 1 can control the DC-DC circuit module 2 to perform a hard shutdown according to the hard shutdown command signal.

[0055] Figure 3 is a schematic diagram of another component-level power electronic device provided in an embodiment of this application. Referring to Figure 3, based on the above embodiments, optionally, the detection module 3 includes: a temperature detection unit 31, a current detection unit 32, and a voltage detection unit 33. The temperature detection unit 31, the current detection unit 32, and the voltage detection unit 33 are all connected to the control module 1. The temperature detection unit 31 is used to detect the internal temperature of the component-level power electronic device 10; the current detection unit 32 is used to detect the input current and output current of the component-level power electronic device 10; and the voltage detection unit 33 is used to detect the input voltage and output voltage of the component-level power electronic device 10.

[0056] Specifically, when the internal temperature of the component-level power electronic device 10 exceeds a set temperature threshold, the control module 1 generates a soft shutdown signal, and the control module 1 controls the DC-DC circuit module 2 to perform a soft shutdown. When the input current and output current of the component-level power electronic device 10 exceed a set current threshold, the control module 1 controls the DC-DC circuit module 2 to perform a hard shutdown. When the input voltage and output voltage of the component-level power electronic device 10 exceed a set voltage threshold, the control module 1 controls the DC-DC circuit module 2 to perform a hard shutdown.

[0057] Referring again to Figure 3, based on the above embodiments, optionally, the communication module 4 includes an electronic carrier communication unit 41. The electronic carrier communication unit 41 is connected to the control module 1 and is used to transmit command signals from the back-end device 20 and / or the photovoltaic system.

[0058] The electronic carrier communication unit 41 (PLC, powerline communication) utilizes power lines for information transmission, eliminating the need for a separate network cabling system; data transmission can be achieved solely through power lines. Compared to wireless communication, the electronic carrier communication unit 41 offers a longer transmission distance. By connecting to the backend device 20 and the photovoltaic system, it can receive command signals from these devices and input them into the control module 1 to control the DC-DC circuit module 2 for hard or soft shutdown.

[0059] The technical solution provided in this application embodiment allows the component-level power electronic device 10 to execute different shutdown methods when shutting down, based on the operating status detected by the detection module 3 or the command signal input by the communication module 4. This shutdown method is flexible and safe. The soft shutdown method provided in this application embodiment achieves soft shutdown of the component-level power electronic device 10 by adjusting the duty cycle of the DCDC circuit module 2. This shutdown method gradually reduces the electrical signal output by the DCDC circuit module 2, thereby reducing the impact on the component-level power electronic device 10 and other connected electrical components during shutdown and extending the service life of the component-level power electronic device 10.

[0060] This application also provides a control method for a component-level power electronic device. The control method for a component-level power electronic device provided in this application is applicable to any component-level power electronic device provided in any embodiment of this application. Figure 4 is a flowchart of a control method for a component-level power electronic device provided in an embodiment of this application. Referring to Figures 3 and 4, the control method for the component-level power electronic device includes:

[0061] S110 The control module generates a soft shutdown signal based on the input signal.

[0062] The input signals include status signals and command signals. Status signals reflect the operating status of the component-level power electronic device 10. For example, when the component-level power electronic device 10 is operating well, the control module 1 generates a soft shutdown signal to turn it off; when a serious fault such as a short circuit occurs inside the component-level power electronic device 10, the control module 1 generates a hard shutdown signal to turn it off. Command signals also include hard shutdown command signals and soft shutdown command signals. The control module 1 generates a hard shutdown signal based on the hard shutdown command signal and a soft shutdown signal based on the soft shutdown command signal. The DC-DC circuit module 2 is built into the component-level power electronic device 10 and is used to regulate the voltage of the input DC signal. The DC-DC circuit module 2 is controlled by the control module 1. When the control module 1 generates a soft shutdown signal, the control module 1 controls the DC-DC circuit module 2 to softly shut down.

[0063] S120, the DCDC circuit module executes a soft shutdown signal, gradually reducing the duty cycle of the DCDC circuit module within a first preset time period to control the output electrical signal of the DCDC circuit module to gradually decrease until the soft shutdown is completed.

[0064] In this system, when the DC-DC circuit module 2 performs a soft shutdown, the output electrical signal is adjusted by regulating the duty cycle of the DC-DC circuit module 2. For example, the electrical signal can be a current signal or a voltage signal. The first preset time is the total time for the DC-DC circuit module to execute the soft shutdown signal. This time is sufficiently long relative to the hard shutdown time to allow the output electrical signal of the DC-DC circuit module 2 to gradually decrease. For example, the first preset time can be 1 second. The duty cycle is the percentage of the DC-DC circuit module 2's on-time within its entire operating cycle. By continuously decreasing the duty cycle within 1 second, the on-time of the DC-DC circuit module 2 gradually decreases, causing the output current and voltage of the DC-DC circuit module 2 to gradually decrease as well. When the output current or voltage of the DC-DC circuit module 2 decreases to 0, the soft shutdown is complete.

[0065] The technical solution provided in this application provides a novel control method for a component-level power electronic device. This method introduces a soft-shutdown approach when turning off the component-level power electronic device 10. Specifically, different shutdown methods can be executed according to different states of the component-level power electronic device 10, offering high flexibility and safety. However, in related technologies, when turning off the component-level power electronic device 10, a hard shutdown is immediately used to quickly disconnect dangerous situations. While this shutdown method is simple, it causes a momentary drop in output voltage and current during shutdown, potentially impacting the component-level power electronic device 10 and other connected electrical components, leading to other adverse consequences. Therefore, compared to related technologies, the embodiments of this application offer higher safety and reliability. Furthermore, the soft shutdown method provided in this application embodiment achieves soft shutdown of the component-level power electronic device 10 by adjusting the duty cycle of the DC-DC circuit module 2. This shutdown method can gradually reduce the electrical signal output by the DC-DC circuit module 2, thereby reducing the impact on the component-level power electronic device 10 and other electrical components connected thereto during shutdown, extending the service life of the component-level power electronic device 10, and has the beneficial effect of being easy to implement.

[0066] Figure 5 is a flowchart of another control method for a component-level power electronic device provided in an embodiment of this application. Referring to Figure 5, based on the above embodiments, optionally, the control method for the component-level power electronic device further includes:

[0067] S210 The control module generates a hard shutdown signal based on the input signal.

[0068] The input signal for generating the hard turn-off signal is different from the input signal for generating the soft turn-off signal.

[0069] Specifically, control module 1 can generate different shutdown signals based on different input signals. For example, when the input signal indicates an emergency such as a serious fault in the component-level power electronic device 10, control module 1 can generate a hard shutdown signal and control the DC-DC circuit module 2 to perform a hard shutdown, causing the electrical signal output by the DC-DC circuit module to instantaneously drop to 0. This configuration ensures rapid fault isolation by the component-level power electronic device 10, improving the operational safety of the component-level power electronic device 10.

[0070] Based on the above embodiments, optionally, the operating state also includes voltage state and / or current state. The control method further includes: the control module 1 acquires the voltage state and / or current state, and when the voltage state exceeds a set voltage threshold, the control module 1 generates a hard shutdown signal; or, when the current state exceeds a set current threshold, the control module 1 generates a hard shutdown signal.

[0071] The voltage status includes the input voltage status and output voltage status of the component-level power electronic device 10, and the current status includes the input current status and output current status of the component-level power electronic device 10. When the voltage status or current status exceeds a set threshold, the component-level power electronic device 10 may experience faults such as short circuits. Such faults can seriously affect the safe operation of the component-level power electronic device 10 and other electrical components connected to it. For example, other electrical components can be inverters. Therefore, the control module 1 needs to generate a hard shutdown signal and control the DC-DC circuit module 2 to perform a hard shutdown, causing the electrical signal output by the DC-DC circuit module 2 to momentarily drop to 0. This disconnects the component-level power electronic device 10 from the inverter, preventing fault voltage and fault current from entering the inverter.

[0072] Referring again to Figure 5, based on the above embodiments, optionally, after the control module generates the hard shutdown signal in S210, the following step is also included:

[0073] The S220 and DCDC circuit modules execute a hard shutdown signal, reducing their output current and voltage signals to 0 within a second preset time until the hard shutdown is completed; the second preset time is less than the first preset time.

[0074] Specifically, when the DC-DC circuit module 2 performs a hard shutdown, the output current and voltage signals can be reduced to zero within a very short time. For example, the second preset time can be 70ms. Hard shutdown is generally performed when a serious fault occurs in the component-level power electronic device 10, and it can quickly disconnect fault current and fault voltage.

[0075] Based on the above embodiments, optionally, within a first preset time period, the duty cycle of the DCDC circuit module 2 is gradually reduced to control the electrical signal output by the DCDC circuit module 2 to gradually decrease until soft shutdown is completed, including: the current signal and voltage signal output by the DCDC circuit module 2 gradually decrease to 0, thereby completing soft shutdown.

[0076] In this process, the DC-DC circuit module 2 performs soft shutdown by continuously lowering the duty cycle until the duty cycle reaches 0. To ensure that the component-level power electronic device 10 has been completely turned off, it is necessary to continue monitoring the current and voltage signals output by the DC-DC circuit module 2. When the DC-DC circuit module 2 has no output voltage or current, it indicates that the soft shutdown has been completed.

[0077] Based on the above embodiments, optionally, the component-level power electronic device 10 includes at least one of a photovoltaic optimizer and a photovoltaic controller.

[0078] Among them, the component-level power electronic device 10 is a type of power electronic device that can perform fine control of electrical energy, including photovoltaic optimizers and photovoltaic controllers.

[0079] This application also provides a photovoltaic system, including the component-level power electronic device as provided in any embodiment of this application, which has similar beneficial effects and will not be described again.

[0080] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0081] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A control method of a component-level power electronic device, the component-level power electronic device comprising a control module and a DCDC circuit module; the control module is connected with the DCDC circuit module, and the control module is configured to adjust a duty cycle of the DCDC circuit module; the control method of the component-level power electronic device comprises: the control module generates a soft-off signal according to an input signal; the DCDC circuit module executes the soft-off signal, gradually reduces the duty cycle of the DCDC circuit module within a first preset time, and controls an electrical signal output by the DCDC circuit module to gradually decrease until the soft-off is completed. 2.The control method of the component-level power electronic device according to claim 1, further comprising: the control module generates a hard-off signal according to an input signal; wherein the input signal for generating the hard-off signal is different from the input signal for generating the soft-off signal. The component-level power electronic device further comprises a detection module connected with the control module, and the detection module is configured to detect an operating state of the component-level power electronic device; the operating state comprises a temperature state. The control module generates a soft-off signal according to an input signal specifically comprises: the control module acquires the temperature state, and generates the soft-off signal when the temperature state exceeds a set temperature threshold. The operating state further comprises a voltage state and / or a current state; and the control method further comprises: the control module acquires the voltage state and / or the current state, generates a hard-off signal when the voltage state exceeds a set voltage threshold, or generates the hard-off signal when the current state exceeds a set current threshold. 5.The control method of the component-level power electronic device according to claim 4, further comprising: after the control module generates the hard-off signal, the DCDC circuit module executes the hard-off signal, and reduces a current signal and a voltage signal output by the DCDC circuit module to 0 within a second preset time until the hard-off is completed; and the second preset time is less than the first preset time.

3. The control method of a component-level power electronics device according to claim 1, wherein, The control method of the component-level power electronic device further comprises: the DCDC circuit module outputs the current signal and the voltage signal gradually decreasing to 0 until the soft-off is completed. The component-level power electronic device further comprises a communication module connected with the control module, and the communication module is configured to transmit an instruction signal of a back-end device. The input signal of the control module comprises a state signal and the instruction signal; wherein the state signal represents the operating state of the component-level power electronic device, and the instruction signal represents a control instruction sent by the back-end device.

4. The control method of a component-level power electronics device according to claim 3, wherein, The instruction signal comprises a hard-off instruction signal and a soft-off instruction signal; and if the instruction signal is the hard-off instruction signal, the control module controls the DCDC circuit module to execute the hard-off instruction signal. ​ ​ ​ ​ 6. The control method of a component-level power electronics device according to any one of claims 1-5, wherein, ​ ​ 7. The control method of a component-level power electronics device according to any one of claims 1-5, wherein, ​ ​ 8. The control method of the assembly-level power electronics device according to claim 7, wherein, ​ ​ If the instruction signal is the soft-off instruction signal, the control module controls the DCDC circuit module to execute the soft-off instruction signal.

9. The control method of a component-level power electronics device according to claim 1, wherein, The component-level power electronic device comprises at least one of a photovoltaic optimizer and a photovoltaic controller.

10. A component-level power electronic device adopting the control method of the component-level power electronic device according to any one of claims 1-9.

11. The component-level power electronic device according to claim 10, further comprising a detection module connected with the control module, wherein the detection module comprises: a temperature detection unit, a current detection unit and a voltage detection unit; the temperature detection unit, the current detection unit and the voltage detection unit are all connected with the control module; the temperature detection unit is used for detecting the internal temperature of the component-level power electronic device; the current detection unit is used for detecting the input current and the output current of the component-level power electronic device; the voltage detection unit is used for detecting the input voltage and the output voltage of the component-level power electronic device.

12. The component-level power electronics device of claim 10, further comprising a communication module; the communication module comprising: an electronic carrier communication unit; the electronic carrier communication unit is connected with the control module, and is used for transmitting the instruction signal sent by a back-end device.

13. A photovoltaic system comprising: The component-level power electronic device according to any one of claims 10-12.

Images