Power control method, management module, power equipment and distributed power system

Abstract

The invention relates to a power control method, a management module, power devices and a distributed power system.The method is applied to the management module in the distributed power system, the distributed power system further comprises a plurality of power devices, the power devices are in communication connection with the management module, and the method comprises the steps that on the basis of a preset period, the management module is connected with the management module; sending a first signal to each power device, wherein the first signal comprises a target device address, a polling instruction and a control instruction; wherein the control instruction is used for each power device to control the power output of the machine; the target device address is used for each power device to determine whether to respond to the polling instruction, and the problem of power device data polling interruption caused by regulation and control of the power device in related technologies is solved.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a power control method, a management module, a power device and a distributed power system. Background Art

[0002] Due to the renewable and clean nature of solar energy, distributed power generation technology has developed rapidly. In a distributed power system, there are multiple power devices. In order to monitor the operating data of each device in the system, it is necessary to continuously poll the operating parameters of the power devices. In addition, according to local regulatory requirements, distributed power systems have special requirements in specific areas or under specific circumstances. Therefore, distributed power systems also need to dynamically control power devices in real time to meet regulatory requirements. Most existing methods control power devices by sending special unicast or broadcast instructions in addition to sending data polling instructions to control the power output of power devices. This method has low channel utilization efficiency, which will cause the power device data polling to be interrupted during the process of regulating the power device, affecting system data monitoring and the comprehensive management and control of the system.

[0003] With regard to the problem in the related art that regulating power equipment may lead to interruption of data polling of power equipment, no effective solution has been proposed yet. Summary of the invention

[0004] In this embodiment, a power control method, a management module, a power device and a distributed power system are provided to solve the problem in the related art that regulating the power device may cause the data polling of the power device to be interrupted.

[0005] In a first aspect, a power control method is provided in this embodiment, which is applied to a management module in a distributed power system, wherein the distributed power system further comprises a plurality of power devices, and the power devices are communicatively connected to the management module, and the method comprises:

[0006] Based on a preset cycle, a first signal is sent to each power device, wherein the first signal includes a target device address, a polling instruction and a control instruction; wherein the control instruction is used by each power device to control the power output of the device; and the target device address is used by each power device to determine whether to respond to the polling instruction.

[0007] In some of the embodiments, the control instruction is generated based on electrical information or status information of the distributed power system.

[0008] In some of the embodiments, the distributed power system also includes an electric meter for collecting grid power data on the grid side, each of the power devices is electrically connected to the grid side, the electric meter is communicatively connected to the management module, the electrical information of the distributed power system includes the grid power data sampled by the electric meter, and the control instruction includes a first control instruction, which is generated based on the electrical information and is used by the power device to adjust the power output of the local device.

[0009] In some embodiments, the first control instruction includes a power adjustment value, and the power adjustment value is determined based on the grid power data.

[0010] In some of the embodiments, the status information of the distributed power system includes an allowed operation state or a safe state, and the control instruction includes a second control instruction, which is generated based on the status information and is used by the power device to turn on or off the local power output.

[0011] In some of the embodiments, before sending the first signal to each power device based on the preset period, the method further includes:

[0012] Obtaining a device number of each of the power devices;

[0013] Networking each of the power devices based on the device number, and assigning a corresponding device address to each of the power devices;

[0014] Based on the device addresses corresponding to the power devices, fields corresponding to the target device addresses in the first signal are generated in sequence.

[0015] In some of the embodiments, the communication method between the management module and each of the power devices includes any one of wireless communication, power line carrier communication or wired communication.

[0016] In a second aspect, a power control method is provided in this embodiment, which is applied to a power device in a distributed power system, wherein the distributed power system includes a management module and a plurality of power devices, each of the power devices is communicatively connected to the management module, and the method includes:

[0017] Receiving a first signal sent by the management module based on a preset period, wherein the first signal includes a target device address, a polling instruction, and a control instruction;

[0018] The power output of the local device is controlled based on the control instruction, and whether to respond to the polling instruction is determined based on the target device address.

[0019] In some embodiments, determining whether to respond to the polling instruction based on the target device address includes:

[0020] Determine whether the target device address is consistent with the device address of the local device;

[0021] In the case of consistency, a second signal is sent to the management module in response to the polling instruction, where the second signal includes the operating parameters of the local machine.

[0022] In some of the embodiments, the operating parameters include at least one of an input voltage, an input current, an output voltage, an output current, a power generation amount, a device temperature, and a device operating mode of the power device.

[0023] In a third aspect, a power control method is provided in this embodiment, which is applied to a distributed power system, wherein the distributed power system includes a management module and a plurality of power devices, each of the power devices is communicatively connected to the management module, and the method includes:

[0024] The management module sends a first signal to each power device based on a preset cycle, wherein the first signal includes a target device address, a polling instruction, and a control instruction;

[0025] The power device controls the power output of the local device based on the control instruction, and determines whether to respond to the polling instruction based on the target device address.

[0026] In a fourth aspect, a management module is provided in this embodiment, and the management module is applied to a distributed power system. The distributed power system also includes multiple power devices, each of which is communicatively connected to the management module. The management module includes a first controller, and the first controller is used to execute the power control method described in the first aspect.

[0027] In a fifth aspect, a power device is provided in this embodiment, and the power device is applied to a distributed power system. The distributed power system includes a management module and multiple power devices, each of the power devices is communicatively connected to the management module, and the power device includes a second controller, and the second controller is used to execute the power control method described in the second aspect.

[0028] In a sixth aspect, a distributed power system is provided in this embodiment, wherein the distributed power system comprises a management module as described in the fourth aspect and a plurality of power devices as described in the fifth aspect, and each of the power devices is communicatively connected to the management module.

[0029] Compared with the related art, the power control method provided in this embodiment is applied to the management module in the distributed power system. The first signal is periodically sent to each power device to query the operation status of each power device. Each power device determines whether to respond to the polling instruction in the first signal according to the target device address in the first signal, and replies to the polling instruction when the target device address is the local address. At the same time, the power output of the local device is controlled according to the control instruction in the first signal, so as to realize power control of the power device while performing normal polling, thereby solving the problem in the related art that regulating the power device will cause the interruption of the power device data polling.

[0030] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 is a connection diagram of a distributed power system in some embodiments of the present application;

[0033] Figure 2 is a flowchart of generating a target device address field in a first signal in some embodiments of the present application;

[0034] Figure 3 is a connection diagram of a distributed power system in some other embodiments of the present application;

[0035] Figure 4 is a connection diagram of a distributed power system in some other embodiments of the present application;

[0036] Figure 5 is a flow chart of a power control method applied to a power device in some embodiments of the present application;

[0037] Figure 6 is a flow chart of response determination of a polling instruction in some embodiments of the present application;

[0038] Figure 7 This is a flow chart of a power control method applied to a distributed power system according to some embodiments of the present application. DETAILED DESCRIPTION

[0039] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0041] Figure 1 This is a connection diagram of a distributed power system in some embodiments of the present application. The distributed power system includes multiple power devices and a management module, and each power device is communicatively connected with the management module.

[0042] Among them, the management module communicates with each power device to monitor and control each power device; the management module can also communicate with other devices such as electric meters and cloud platforms, and receive external input to collect electrical information or receive command information.

[0043] In some embodiments, the management module may be a separate device; or, the management module may be integrated into other devices, such as an inverter, a DC converter, an AC converter, etc.; or, the management module may include multiple devices, which are communicatively connected to each other, and each device is used to implement different functions, for example, the first device of the management module is used to communicate with the power device, and the second device of the management module is used to receive other input information.

[0044] Specifically, the communication method between the management module and each power device includes any one of wireless communication, power line carrier communication or wired communication.

[0045] The power device may be a circuit breaker, an optimizer, a micro inverter, a string inverter, an energy storage inverter, a monitor, etc. The output ends of multiple power devices may be connected in series and / or in parallel, and the output ends of each power device may also be directly connected to the bus, respectively, without limitation.

[0046] In one embodiment, a power control method is provided, which is applied to Figure 1 The management module in the distributed power system shown in the figure is used as an example for explanation, including:

[0047] Based on a preset cycle, a first signal is sent to each power device, the first signal including a target device address, a polling instruction and a control instruction; wherein the control instruction is used by each power device to control the power output of the device; and the target device address is used by each power device to determine whether to respond to the polling instruction.

[0048] According to the preset polling cycle, the management module periodically sends a first signal to each power device to query the operation status of each power device. The first signal includes a target device address, a polling instruction and a control instruction.

[0049] After receiving the first signal, the power device can determine whether the queried target device is the local device according to the target device address in the first signal. If it is the local device, it will respond to the polling instruction and reply to the management module with a second signal, which includes the query content corresponding to the polling instruction. If it is not the local device, it will not reply. At the same time, the power device can also parse the control instruction in the first signal and control the power output of the local device according to the content of the control instruction. It should be noted that the control instruction is not limited by the target device address. When the target device address in the first signal is not the local device, the power output of the local device will also be controlled according to the control instruction.

[0050] In the power control method of the present embodiment, the management module periodically sends a first signal to each power device to inquire about the operating status of each power device. Each power device determines whether to respond to the polling instruction in the first signal according to the target device address in the first signal, and replies to the polling instruction when the target device address is the local address. At the same time, the power output of the local device is controlled according to the control instruction in the first signal, thereby realizing power control of the power device during normal polling, thereby solving the problem in the related technology that regulating the power device will cause the interruption of the power device data polling.

[0051] In some embodiments, the present invention also relates to a process in which the management module generates a target device address field before sending the first signal to each power device. Figure 2 is a flowchart of generating a target device address field in a first signal in some embodiments of the present application, such as Figure 2 As shown, the process includes the following steps:

[0052] Step S201, obtaining the device number of each power device.

[0053] In one specific embodiment, the management module can receive the device number sent by each power device through the communication connection with each power device. In another specific embodiment, the management module includes an input device, and the device number of each power device is directly input through the input device.

[0054] Step S202: Network each power device based on the device number and assign a corresponding device address to each power device.

[0055] Network each power device according to the device number and assign a device address to each power device.

[0056] Step S203: Based on the device addresses corresponding to the power devices, fields corresponding to the target device addresses in the first signal are generated in sequence.

[0057] The management module can generate an address table according to the device addresses of all power devices in the current communication network, and based on the device addresses in the address table, generate fields of target device addresses corresponding to each power device in turn, and generate a corresponding first signal according to the field to realize polling of each power device.

[0058] Through steps S201 to S203, by obtaining the device number of each power device, each power device is networked based on the device number, and a corresponding device address is assigned to each power device. Based on the device address corresponding to each power device, the fields corresponding to the target device address in the first signal are generated in sequence, and the corresponding first signal is generated according to the field to realize polling of each power device.

[0059] In some embodiments, the management module may also use the device number as the device address, and generate a field corresponding to the target device address in the first signal based on the device number corresponding to each power device.

[0060] In some specific embodiments, the control instruction may be generated by the management module based on electrical information or status information of the distributed power system.

[0061] The electrical information of the distributed power system may include power data, voltage value, current value and other information obtained by measuring key positions of the system, and the output of the power device is adjusted based on the power supply situation indicated by the electrical information, so that the power output of the system meets the power supply demand. The management module can obtain the electrical information of the distributed power system from the electric meter and / or other collectors.

[0062] The status information of the distributed power system may include an allowed operation state and a safe state. In the allowed operation state, each power device in the distributed power system should operate normally and turn on power output; in the safe state, each power device in the distributed power system should turn off power output. The output of the power device is turned on or off based on the status information, so that the system meets the safety requirements.

[0063] Figure 3 It is a connection diagram of a distributed power system of some embodiments of the present application, and the distributed power system includes a management module and a plurality of power devices, and each power device is communicatively connected to the management module. The power device may be an inverter such as a micro inverter, a string inverter, or an energy storage inverter. The output ends of the inverters may be connected in parallel or directly to the AC bus. According to local regulatory requirements, it is not allowed to deliver excess electric energy to the power grid in certain areas or under certain circumstances, so the power generation of the inverter needs to be adjusted dynamically in real time to meet regulatory requirements.

[0064] like Figure 3 As shown, the output end of each inverter is connected to the AC bus and also connected to the grid side. The AC bus is also connected to uncontrolled devices. The uncontrolled devices can store or use the output electric energy of each inverter and can also draw electricity from the grid. The uncontrolled devices are not connected to the management module for communication and are therefore not controlled by the management module. Uncontrolled devices can be power-consuming devices or energy storage devices. The sudden connection or disconnection of uncontrolled devices will cause grid power fluctuations on the grid side. The distributed power system also includes an electric meter for collecting grid power data on the grid side. The electric meter is connected to the management module for communication. The electrical information of the distributed power system includes grid power data sampled by the electric meter. The control instruction includes a first control instruction, which is generated based on the electrical information and is used for the power device to adjust the power output of the machine.

[0065] like Figure 3 As shown, the electric meter is connected in series between the AC bus and the grid side, and is used to collect grid power data on the grid side and send the grid power data to the management module. The grid power data includes at least one of a current value, a voltage value, and a power value. The management module generates a corresponding first control instruction based on the grid power data obtained from the electric meter.

[0066] In one embodiment, when it is determined based on the grid power data that the inverter is generating electricity to the grid side, a first control instruction can be generated for the inverter to reduce its output power. After receiving the first signal, the inverter reduces its own output power based on the first control instruction, so that the inverter does not generate electricity to the grid side, thereby achieving backflow prevention.

[0067] In another embodiment, when it is determined based on the grid power data that the inverter does not generate electricity to the grid side but supplies power to the grid, a first control instruction can be generated for the inverter to increase its output power. After receiving the first signal, the inverter increases its own output power based on the first control instruction, so that the grid does not need to supply power, thereby saving grid electricity costs.

[0068] In a further embodiment, the first control instruction includes a power adjustment value, which is determined based on grid power data.

[0069] The management module can calculate the power adjustment value based on the power grid data collected by the electric meter. In a specific embodiment, the power adjustment value = the power grid value / the number of inverters. Each inverter reduces or increases its own output power according to the power adjustment value in the first control instruction.

[0070] In this embodiment, the management module periodically sends a first signal to each inverter to query the operating status of each inverter. Each inverter determines whether to respond to the polling instruction in the first signal according to the target device address in the first signal, and replies to the polling instruction when the target device address is the local address. At the same time, the inverter adjusts the power output of the local device according to the first control instruction in the first signal, thereby realizing power adjustment of the inverter during normal polling, which not only regulates the power output of the inverter in real time, but also does not cause data polling interruption.

[0071] Figure 4 is a connection diagram of a distributed power system in some other embodiments of the present application, such as Figure 4 As shown, the distributed power system includes a management module and multiple power devices, and each power device is connected to the management module in communication. The power device includes an optimizer or a switch, and the output ends of multiple optimizers / switches are connected in series. The distributed power system may include multiple groups of optimizers / switches connected in series. The optimizers / switches are connected in series to form a DC high-voltage system. In order to ensure the safety of the system and personnel when the system fails or when maintenance is performed, the distributed power system is required to automatically reduce the DC voltage in these cases, and it is necessary to control the optimizer / switches to shut down the power output.

[0072] The state information of the distributed power system may include an allowed operation state or a safe state, which may be determined by the management module based on the acquired polling data, or may be input externally. The external input may be that the management module may obtain the state information from the cloud platform, or the user may directly input the state information to the management module. The state information of the distributed power system may include an allowed operation state or a safe state, and the control instruction may include a second control instruction, which is generated based on the state information and is used for the optimizer / shutdown device to turn on or off the power output of the machine.

[0073] When the status information is in the state of allowing operation, the second control instruction is the instruction of allowing operation, and the optimizer / shutdown device starts the power output of the machine after receiving the first signal containing the second control instruction for a specified number of consecutive times. When the status information is in the safe state, the second control instruction is not generated. If the first signal received by the optimizer / shutdown device within the specified time does not include the second control instruction or the first signal is not received, the power output of the machine is shut down. Alternatively, when the status information is in the safe state, the second control instruction is a shutdown instruction, and the optimizer / shutdown device shuts down the power output of the machine after receiving the first signal containing the second control instruction.

[0074] In this embodiment, the management module periodically sends a first signal to each optimizer / shutdown switch to query the operating status of each optimizer / shutdown switch. Each optimizer / shutdown switch determines whether to respond to the polling instruction in the first signal according to the target device address in the first signal, and replies to the polling instruction when the target device address is the local address. At the same time, the inverter turns on or off the power output of the local device according to the second control instruction in the first signal, thereby switching the power output of the optimizer / shutdown switch on and off during normal polling, thereby controlling the operating status of the optimizer / shutdown switch in real time and not causing data polling interruption.

[0075] Some embodiments of the present application also provide a power control method, which is applied to Figure 1 Power devices in distributed power systems. Figure 5 is a flow chart of a power control method applied to a power device in some embodiments of the present application, such as Figure 5 As shown, the process includes the following steps:

[0076] Step S501: receiving a first signal sent by a management module based on a preset period, where the first signal includes a target device address, a polling instruction, and a control instruction.

[0077] The management module periodically sends a first signal to each power device to query the operation status of each power device. The first signal includes a target device address, a polling instruction and a control instruction.

[0078] Step S502, controlling the power output of the local device based on the control instruction, and determining whether to respond to the polling instruction based on the target device address.

[0079] After receiving the first signal, the power device can determine whether the queried target device is the local device according to the target device address in the first signal. If it is the local device, the power device responds to the polling instruction, and if it is not the local device, the power device does not respond. At the same time, the power device also parses the control instruction in the first signal and controls the power output of the local device according to the content of the control instruction. It should be noted that the control instruction is not limited by the target device address. When the target device address in the first signal is not the local device, the power output of the local device can also be controlled according to the control instruction.

[0080] Through steps S501 to S502, the power device receives a first signal sent by the management module based on a preset period, wherein the first signal includes a target device address, a polling instruction and a control instruction, and controls the power output of the machine based on the control instruction, and determines whether to respond to the polling instruction based on the target device address. This enables the power device to perform power control according to the control instruction of the management module while normally receiving the polling instruction, thereby solving the problem in related technologies that regulating the operating status of the power device will cause the data polling of the power device to be interrupted.

[0081] In some embodiments, Figure 6 is a flow chart of response determination of polling instructions in some embodiments of the present application, such as Figure 6 As shown, the process includes the following steps:

[0082] Step S601, determining whether the target device address is consistent with the device address of the local device.

[0083] The polling instruction in the first signal is only for the power device whose address is consistent with the target device address. Therefore, after receiving the first signal, the power device first determines whether the target device address is consistent with the device address of the local device. The device address of the power device can be determined by the management module after completing the networking and performing address allocation on each power device.

[0084] Step S602: If they are consistent, a second signal is sent to the management module in response to the polling instruction, where the second signal includes the operating parameters of the local device.

[0085] When the target device address is consistent with the device address of the local device, a second signal is sent to the management module to reply to the polling instruction. The second signal may include the operating parameters of the local device.

[0086] Specifically, the operating parameters include at least one of an input voltage, an input current, an output voltage, an output current, a power generation amount, a device temperature, and a device operating mode of the power device.

[0087] Through steps S601 to S602, it is determined whether the target device address is consistent with the device address of the local device. If they are consistent, a second signal is sent to the management module in response to the polling instruction. The second signal includes the operating parameters of the local device. That is, the management module obtains the operating parameters of each power device through the polling instruction, and realizes status monitoring of each power device through polling.

[0088] Some embodiments of the present application also provide a power control method, which is applied to Figure 1 Distributed power systems. Figure 7 is a flow chart of a power control method applied to a distributed power system in some embodiments of the present application, such as Figure 7 As shown, the process includes the following steps:

[0089] Step S701: The management module sends a first signal to each power device based on a preset cycle, where the first signal includes a target device address, a polling instruction, and a control instruction;

[0090] Step S702: The power device controls the power output of the device based on the control instruction, and determines whether to respond to the polling instruction based on the target device address.

[0091] Through steps S701 to S702, the management module periodically sends a first signal to each power device to query the operating status of each power device; the power device controls the power output of the local device based on the control instruction, and determines whether to respond to the polling instruction based on the target device address, thereby realizing that the power device performs power control according to the control instruction of the management module while normally receiving the polling instruction, thereby solving the problem in related technologies that regulating the operating status of the power device will cause the interruption of the power device data polling.

[0092] In some embodiments, a management module is also provided, which is applied to Figure 1 In the distributed power system shown, the management module includes a first controller, and the first controller is used to execute the power control method applied to the management module in the above embodiment.

[0093] In some embodiments, a power device is also provided, which is applied to Figure 1 In the distributed power system shown, the power device includes a second controller, and the second controller is used to execute the power control method applied to the power device in the above embodiment.

[0094] In some embodiments, a distributed power system is also provided. The structure of the distributed power system is as follows: Figure 1 The distributed power system comprises at least one management module of the above embodiment and a plurality of power devices of the above embodiment, and each of the power devices is in communication connection with the management module.

[0095] For the specific definition of the management module, power device, and distributed power system, please refer to the definition of the power control method above, which will not be repeated here. Each module in the above management module and power device can be implemented in whole or in part by software, hardware, and a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0096] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0097] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0098] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0099] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0100] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A power control method, applied to a management module in a distributed power system, wherein the distributed power system further comprises a plurality of power devices, wherein the power devices are communicatively connected to the management module, and wherein: The method comprises: Based on a preset cycle, a first signal is sent to each power device, wherein the first signal includes a target device address, a polling instruction and a control instruction; wherein the control instruction is used by each power device to control the power output of the device; and the target device address is used by each power device to determine whether to respond to the polling instruction.

2. The method according to claim 1, characterized in that The control instruction is generated based on electrical information or status information of the distributed power system.

3. The method according to claim 2, characterized in that The distributed power system also includes an electric meter for collecting grid power data on the grid side. Each of the power devices is electrically connected to the grid side. The electric meter is communicatively connected to the management module. The electrical information of the distributed power system includes the grid power data sampled by the electric meter. The control instruction includes a first control instruction, which is generated based on the electrical information and is used by the power device to adjust the power output of the local device.

4. The method according to claim 3, characterized in that The first control instruction includes a power adjustment value, and the power adjustment value is determined based on the grid power data.

5. The method according to claim 2, characterized in that: The state information of the distributed power system includes an allowed operation state or a safe state, and the control instruction includes a second control instruction, which is generated based on the state information and is used for the power device to turn on or off the power output of the local device.

6. The method according to claim 1, characterized in that Before sending the first signal to each power device based on the preset cycle, the method further includes: Obtaining a device number of each of the power devices; Networking each of the power devices based on the device number, and assigning a corresponding device address to each of the power devices; Based on the device addresses corresponding to the power devices, fields corresponding to the target device addresses in the first signal are generated in sequence.

7. The method according to claim 1, characterized in that The communication method between the management module and each of the power devices includes any one of wireless communication, power line carrier communication or wired communication.

8. A power control method, applied to a power device in a distributed power system, wherein the distributed power system comprises a management module and a plurality of power devices, each of the power devices being communicatively connected to the management module, characterized in that: The method comprises: Receiving a first signal sent by the management module based on a preset period, wherein the first signal includes a target device address, a polling instruction, and a control instruction; The power output of the local device is controlled based on the control instruction, and whether to respond to the polling instruction is determined based on the target device address.

9. The method according to claim 8, characterized in that The determining whether to respond to the polling instruction based on the target device address includes: Determine whether the target device address is consistent with the device address of the local device; In the case of consistency, a second signal is sent to the management module in response to the polling instruction, where the second signal includes the operating parameters of the local machine.

10. The method according to claim 9, characterized in that The operating parameters include at least one of an input voltage, an input current, an output voltage, an output current, a power generation amount, a device temperature, and a device operating mode of the power device.

11. A power control method, applied to a distributed power system, the distributed power system comprising a management module and a plurality of power devices, each of the power devices being communicatively connected to the management module, characterized in that: The method comprises: The management module sends a first signal to each power device based on a preset cycle, wherein the first signal includes a target device address, a polling instruction, and a control instruction; The power device controls the power output of the local device based on the control instruction, and determines whether to respond to the polling instruction based on the target device address.

12. A management module, the management module is applied to a distributed power system, the distributed power system further comprises a plurality of power devices, each of the power devices is communicatively connected to the management module, characterized in that: The management module comprises a first controller, and the first controller is used to execute the power control method according to any one of claims 1 to 7.

13. A power device, the power device is applied to a distributed power system, the distributed power system comprises a management module and a plurality of power devices, each of the power devices is communicatively connected with the management module, characterized in that: The power device comprises a second controller, and the second controller is used to execute the power control method according to any one of claims 8 to 10.

14. A distributed power system, characterized in that: The distributed power system comprises the management module as claimed in claim 12 and a plurality of power devices as claimed in claim 13, each of the power devices being communicatively connected to the management module.

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