Photovoltaic abandoned light power processing method, device and central control equipment

Abstract

The present invention discloses a photovoltaic abandoned light power processing method, device and central control equipment, belonging to the field of photovoltaic technology, the method includes: obtaining the first output power of the photovoltaic power generation system in the abandoned light working state, and starting the target power-consuming equipment connected to the photovoltaic power generation system; if the start-up operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state, obtaining the second output power of the photovoltaic power generation system; determining the current abandoned light power of the photovoltaic power generation system according to the first output power and the second output power, and using the power-consuming equipment connected to the photovoltaic power generation system to absorb the current abandoned light power. The present invention at least solves the technical problem of inaccurate abandoned light power measurement of the photovoltaic power generation system and the problem of low photovoltaic power generation utilization efficiency to a certain extent.

Description

Technical Field

[0001] The present invention belongs to the field of photovoltaic technology, and in particular relates to a photovoltaic abandoned light power processing method, device and central control equipment. Background Art

[0002] In recent years, distributed photovoltaic power generation has experienced rapid development. Distributed photovoltaic power generation refers to the configuration of a smaller photovoltaic power generation system at the user site or close to the power consumption site to meet the power demand of specific users.

[0003] The issue of abandoned light in distributed photovoltaic power generation has always attracted much attention. The absorption of photovoltaic power generation power connected to the user side is a dynamic process. Once the photovoltaic power generation power exceeds the electricity demand on the user side, abandoned light will occur, resulting in a waste of resources. The abandoned light power is a parameter to measure the amount of abandoned light. The measurement of abandoned light power is affected by many factors that affect the photovoltaic power generation power, such as: geographical location, installation method, irradiation intensity, ambient temperature, surface dust, etc. The measurement of various factors is complex and difficult to measure one by one, resulting in inaccurate measurement of abandoned light power. The accuracy of using clustering algorithms to predict abandoned light power depends on the previous operation data. Therefore, the current measurement of abandoned light power is inaccurate and the utilization efficiency of photovoltaics is low because the abandoned light power is difficult to be used. Summary of the invention

[0004] The embodiments of the present invention provide a method, device and central control equipment for processing photovoltaic abandoned light power, which at least to a certain extent solve the technical problem of inaccurate measurement of abandoned light power in photovoltaic power generation systems, and can improve the utilization efficiency of photovoltaic power generation by absorbing the measured abandoned light power.

[0005] In a first aspect, an embodiment of the present invention provides a method for processing photovoltaic abandoned light power, comprising: obtaining a first output power of the photovoltaic power generation system in an abandoned light working state, and starting a target electrical equipment connected to the photovoltaic power generation system; if the startup operation of the target electrical equipment causes the photovoltaic power generation system to exit the abandoned light working state, obtaining a second output power of the photovoltaic power generation system; determining a current abandoned light power of the photovoltaic power generation system based on the first output power and the second output power, and absorbing the current abandoned light power by using the electrical equipment connected to the photovoltaic power generation system.

[0006] In combination with the first aspect of the present invention, in some embodiments, the method further includes: if the photovoltaic power generation system continues to maintain a power abandonment working state after the target electrical equipment is turned on, determining that the current power abandonment power of the photovoltaic power generation system is greater than the rated power of the target electrical equipment; controlling the target electrical equipment to continue operating, and partially absorbing the current power abandonment power of the photovoltaic power generation system based on the continued operation of the target electrical equipment.

[0007] In combination with the first aspect of the present invention, in some embodiments, the use of electrical equipment connected to the photovoltaic power generation system to absorb the current abandoned light power includes: adjusting the state of each electrical equipment connected to the photovoltaic power generation system according to the current abandoned light power, so as to at least partially absorb the current abandoned light power of the photovoltaic power generation system.

[0008] In combination with the first aspect of the present invention, in some embodiments, the state of each electrical equipment connected to the photovoltaic power generation system is adjusted according to the current abandoned power, including: comparing the current abandoned power with the rated power of the target electrical equipment; if the current abandoned power is equal to the rated power of the target electrical equipment, controlling the target electrical equipment to continue operating, and fully absorbing the current abandoned power of the photovoltaic power generation system based on the continued operation of the target electrical equipment.

[0009] In combination with the first aspect of the present invention, in some embodiments, after comparing the current abandoned light power with the rated power of the target power device, it also includes: if the current abandoned light power is less than the rated power of the target power device, shutting down the target power device; determining M candidate power devices other than the target power device based on the current abandoned light power, where M is a positive integer; and adjusting the operating status of the M candidate power devices so that the actual operating power of the M candidate power devices is not greater than the current abandoned light power.

[0010] In combination with the first aspect of the present invention, in some embodiments, the determining of M candidate power devices other than the target power device based on the current abandoned light power includes: determining N first-category candidate power devices that are not currently in operation, and / or K second-category candidate power devices that are currently in operation, based on the current abandoned light power; wherein N and K are both non-negative integers, and the sum of N and K is equal to M, the first-category candidate power devices are devices that require intermittent power supply, and the second-category candidate power devices are devices with adjustable operating frequency.

[0011] In combination with the first aspect of the present invention, in some embodiments, the adjusting the operating status of the M candidate electrical devices includes: controlling the start-up operation or charging of the N first-category candidate electrical devices, and / or increasing the actual operating power of the K second-category candidate electrical devices, so that the sum of the actual operating power of the K second-category candidate electrical devices and the actual operating power of the N first-category candidate electrical devices is not greater than the current abandoned power of the photovoltaic power generation system.

[0012] In combination with the first aspect of the present invention, in some embodiments, if the K second-category candidate electrical devices currently in operation include air-conditioning equipment, increasing the actual operating power of the K second-category candidate electrical devices includes: if the air-conditioning equipment is operating in a cooling condition, increasing the compressor frequency of the air-conditioning equipment; if the air-conditioning equipment is operating in a heating condition, increasing the compressor frequency of the air-conditioning equipment and / or turning on the electric auxiliary heating of the air-conditioning equipment.

[0013] In combination with the first aspect of the present invention, in some embodiments, determining the current abandoned power of the photovoltaic power generation system based on the first output power and the second output power includes: determining the power difference between the first output power and the second output power; and determining the current abandoned power of the photovoltaic power generation system based on the power difference.

[0014] In the second aspect, an embodiment of the present invention provides a photovoltaic abandoned light power processing device, including: a first power acquisition unit, used to obtain the first output power of the photovoltaic power generation system in the abandoned light working state; an equipment startup unit, used to start the target power-consuming equipment connected to the photovoltaic power generation system; a second power acquisition unit, used to obtain the second output power of the photovoltaic power generation system if the startup operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state; an abandoned light power determination unit, used to determine the current abandoned light power of the photovoltaic power generation system based on the first output power and the second output power; a first equipment control unit, used to use the power-consuming equipment connected to the photovoltaic power generation system to absorb the current abandoned light power.

[0015] In a third aspect, an embodiment of the present invention provides a central control device, which is connected to a photovoltaic power generation system and each electrical device connected to the photovoltaic power generation system. The central control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the method described in any embodiment of the first aspect are implemented.

[0016] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0017] Obtain the first output power of the photovoltaic power generation system in the abandoned light working state, and start the target power equipment connected to the photovoltaic power generation system; if the startup and operation of the target power equipment causes the photovoltaic power generation system to exit the abandoned light working state, obtain the second output power of the photovoltaic power generation system; determine the current abandoned light power of the photovoltaic power generation system based on the first output power and the second output power. Since there is no need to monitor the various factors that affect the photovoltaic power generation power, it is only necessary to obtain the output power of the photovoltaic power generation system before and after turning on the target power equipment. If the startup and operation of the target power equipment causes the photovoltaic power generation system to exit the abandoned light working state, the current abandoned light power of the photovoltaic power generation system can be determined, which is easy to implement and has high accuracy. In addition, the utilization efficiency of photovoltaic power generation can be improved by absorbing the measured current abandoned light power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A flow chart of a method for processing photovoltaic abandoned light power in an embodiment of the present invention is shown;

[0020] Figure 2 An implementation of the photovoltaic abandoned light power processing method in an embodiment of the present invention is shown;

[0021] Figure 3 Schematic diagram of the structure of a photovoltaic abandoned light power processing device in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the structure of a central control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The embodiment of the present invention provides a method for processing photovoltaic abandoned light power, which can be executed by a central control device, which is connected to a photovoltaic power generation system and each power-consuming device connected to the photovoltaic power generation system. The central control device is connected to the photovoltaic power generation system to obtain the output power and working status of the photovoltaic power generation system. The central control device is connected to each power-consuming device to start and stop each power-consuming device and adjust the operating parameters of the power-consuming device according to the output power and working status of the photovoltaic power generation system. It should be understood that the central control device can be integrated into the photovoltaic power generation system or can be independently set relative to the photovoltaic power generation system.

[0026] refer to Figure 1 As shown, a photovoltaic abandoned light power processing method provided by an embodiment of the present invention includes the following steps:

[0027] S101: Obtain a first output power of a photovoltaic power generation system in a power abandonment working state, and start a target electrical device connected to the photovoltaic power generation system.

[0028] It should be noted that the photovoltaic power generation system in the embodiment of the present invention refers to a distributed photovoltaic power generation system, and various user-side electrical equipment are connected to the distributed photovoltaic power generation system. For example, in a home scenario, various household appliances are connected to the distributed photovoltaic power generation system.

[0029] Since the number and type of the various electrical equipment connected to the photovoltaic power generation system are dynamically changing, and the actual operating power of some of the electrical equipment in operation is dynamically changing, the photovoltaic consumption of the photovoltaic power generation system on the user side is also dynamically changing. Moreover, the photovoltaic power generation power of the photovoltaic power generation system also changes dynamically due to changes in irradiation intensity and ambient temperature. The above factors will cause the working state of the photovoltaic power generation system to not always be in the abandoned light working state or always in the MPPT (Maximum Power Point Tracking) working state, and the abandoned light power in the abandoned light working state is also dynamically changing. Therefore, in the power generation process of the photovoltaic power generation system, the first working state of the photovoltaic power generation system before the target electrical equipment is turned on is obtained; it is determined whether the first working state is the abandoned light working state; if so, it indicates that the current photovoltaic power generation power of the photovoltaic power generation system exceeds the actual current power demand on the user side, there is a waste of resources, and the execution step S101 is triggered.

[0030] It should be noted that the first output power refers to the output power of the photovoltaic power generation system in the abandoned light working state before the target electrical equipment is turned on. The first output power can be obtained by detecting an electric power meter connected to the output position of the photovoltaic power generation system, or by calculating after detecting the instantaneous current and voltage output by the photovoltaic power generation system. Specifically, the first output power can be obtained by detecting the output end of the photovoltaic inverter of the photovoltaic power generation system.

[0031] In order to improve the accuracy of the first output power, before the target electrical equipment is turned on, the actual output power of the photovoltaic power generation system in the abandoned light working state is monitored. When it is monitored that the actual output power of the photovoltaic power generation system is in a constant state for a preset time, the current output power of the photovoltaic power generation system is obtained as the first output power; after obtaining the first output power, the target electrical equipment connected to the photovoltaic power generation system is turned on.

[0032] It should be noted that the preset duration can be set according to actual needs, for example, the preset duration can be set to 1 minute, 2 minutes or 3 minutes.

[0033] The target electrical equipment refers to equipment that uses electrical energy to process a substance and then stores it. Generally speaking, the target electrical equipment can be a heat storage device, such as an electric water heater or a heat pump water heater, etc. Of course, some mobile devices that need to be charged can also be used as a substitute, such as a portable air conditioner or a sweeping robot.

[0034] S102: If the start-up operation of the target electrical equipment causes the photovoltaic power generation system to exit the abandoned light working state, a second output power of the photovoltaic power generation system is obtained.

[0035] It can be understood that if the photovoltaic power generation system has less abandoned light power before the target power-consuming equipment is turned on, the startup operation of the target power-consuming equipment is sufficient to absorb all the abandoned light power of the photovoltaic power generation system. Therefore, once the startup operation of the target power-consuming equipment is sufficient to make the photovoltaic power generation system exit from the abandoned light working state and switch to the MPPT working state, the second output power of the photovoltaic power generation system is obtained.

[0036] After the target electrical equipment starts running, the second working state of the photovoltaic power generation system is obtained; the second working state is identified, and if the second working state is identified as the MPPT working state, it indicates that the startup and operation of the target electrical equipment causes the photovoltaic power generation system to exit the abandoned light working state.

[0037] It should be noted that the second output power refers to the output power of the photovoltaic power generation system in the abandoned light working state when the target electrical equipment is in the operating state. It should be understood that the second output power in the operating state of the target electrical equipment can be detected by an electric power meter connected to the output position of the photovoltaic power generation system, or the second output power can be calculated after detecting the instantaneous current and voltage output by the photovoltaic power generation system in the operating state of the target electrical equipment.

[0038] In order to improve the accuracy of the second output power, after the target electrical equipment starts running, the actual output power of the photovoltaic power generation system in the abandoned light working state is monitored until the duration of the actual output power of the photovoltaic power generation system being in a constant state reaches a preset duration, and the current output power of the photovoltaic power generation system is obtained as the second output power.

[0039] S103: determining the current abandoned power of the photovoltaic power generation system according to the first output power and the second output power, and absorbing the current abandoned power by using electrical equipment connected to the photovoltaic power generation system.

[0040] In step S103, the current abandoned light power of the photovoltaic power generation system is determined based on the difference between the first output power and the second output power. The power difference between the second output power and the first output power can be directly calculated, and the current abandoned light power of the photovoltaic power generation system can be determined based on the power difference: for example, the power difference is directly used as the current abandoned light power of the photovoltaic power generation system: Pwst = P1-P0, where P1 is the second output power, P0 is the first output power, and Pwst is the current abandoned light power. The difference between the second output power and the first output power can also be corrected based on the correction factor, and the correction result is used as the current abandoned light power of the photovoltaic power generation system.

[0041] The current abandoned light power of the photovoltaic power generation system is determined according to the first output power and the second output power, so that the current abandoned light power of the photovoltaic power generation system is measured accurately and easily.

[0042] It is understandable that using the electrical equipment connected to the photovoltaic power generation system to absorb the current abandoned light power can include: adjusting the state of each electrical equipment connected to the photovoltaic power generation system according to the current abandoned light power to at least partially absorb the current abandoned light power of the photovoltaic power generation system, which can improve the utilization efficiency of photovoltaic power generation. Of course, the determination of the current abandoned light power of the photovoltaic power generation system can also be used for other purposes, such as evaluating and counting the abandoned light power of the photovoltaic power generation system over a period of time.

[0043] In a home scenario, electrical equipment connected to the photovoltaic power generation system includes various household appliances, such as air conditioners, air purifiers, lighting equipment, water purifiers, electric water heaters, heat pump water heaters, fans, etc.

[0044] It can be understood that the states of various electrical equipment connected to the photovoltaic power generation system are adjusted according to the current abandoned power of the photovoltaic power generation system, including: comparing the current abandoned power with the rated power of the target electrical equipment; if the current abandoned power of the photovoltaic power generation system is equal to the rated power of the target electrical equipment, controlling the target electrical equipment to continue operating, and based on the continued operation of the target electrical equipment, the current abandoned power of the photovoltaic power generation system can be fully absorbed.

[0045] It is understandable that if the current abandoned light power is less than the rated power of the target power device, it indicates that the current abandoned light power is insufficient to maintain the operation of the target power device, and grid power needs to be consumed. Therefore, when the current abandoned light power of the photovoltaic power generation system is less than the rated power of the target power device, the target power device is turned off, and M candidate power devices other than the target power device are determined based on the current abandoned light power, where M is a positive integer; the operating status of the M candidate power devices is adjusted so that the sum of the actual operating powers of the M candidate power devices is not greater than the current abandoned light power of the photovoltaic power generation system. It should be understood that the M candidate power devices are determined based on the current abandoned light power to obtain the M candidate power devices adapted to the current abandoned light power, so that the photovoltaic abandoned light power consumed by the operation of the M candidate power devices is less than the photovoltaic abandoned light power consumed by the operation of the target power device, and the target power device is replaced by the M candidate power devices, which can more reasonably consume the photovoltaic abandoned light power and avoid the additional consumption of grid power when absorbing the photovoltaic abandoned light power.

[0046] It is understandable that the M candidate electrical devices may be of one or more of the following types:

[0047] The first category of candidate electrical equipment: equipment that needs to be powered at intervals. For example, electrical equipment that needs to be operated at intervals: water purification equipment, air purification equipment, etc.; another example is mobile devices that need to be charged at intervals: portable air conditioners, sweeping robots, etc.

[0048] The second category of candidate electrical equipment: electrical equipment with adjustable operating frequency, such as air conditioners, refrigerators, etc.

[0049] It can be understood that when determining M candidate electrical devices other than the target electrical device, only the M first-class candidate electrical devices that are not currently in operation can be determined based on the current abandoned light power, wherein the sum of the rated powers of the M first-class candidate electrical devices is not greater than the current abandoned light power.

[0050] It is understandable that when determining the M candidate electrical devices other than the target electrical device, only the M second-category candidate electrical devices currently in operation may be determined according to the current abandoned optical power.

[0051] Of course, in the specific implementation process, it is also possible to determine the N first-category candidate electrical devices that are not currently in operation and the K second-category candidate electrical devices that are currently in operation based on the current abandoned power, wherein N and K are both non-negative integers, and the sum of N and K is equal to M. It should be understood that when adjusting the operating status of the M candidate electrical devices, the N first-category candidate electrical devices are controlled to start running or be charged, and / or the actual operating power of the K second-category candidate electrical devices is increased, so that the sum of the actual operating power of the K second-category candidate electrical devices and the actual operating power of the N first-category candidate electrical devices is not greater than the current abandoned power of the photovoltaic power generation system.

[0052] Specifically, for the N first-category candidate power-consuming devices that are not currently in operation: the first-category candidate power-consuming devices that need to be operated at intervals are controlled to start operating, and the mobile devices that need to be charged at intervals are controlled to be charged.

[0053] If the K second-category candidate electrical devices currently in operation include air-conditioning equipment, for the air-conditioning equipment, if the air-conditioning equipment is operating in a cooling condition, the compressor frequency of the air-conditioning equipment is increased; if the air-conditioning equipment is operating in a heating condition, the compressor frequency of the air-conditioning equipment is increased and / or the electric auxiliary heating of the air-conditioning equipment is turned on.

[0054] In a relatively simple way, in order to reduce the complexity of adjusting the status of each power-consuming device connected to the photovoltaic power generation system, when the current abandoned power of the photovoltaic power generation system is less than the rated power of the target power-consuming device, only a single candidate power-consuming device can be determined to replace the target power-consuming device to absorb the photovoltaic power. The rated power or the increased operating power of the determined candidate power-consuming device is closest to the current abandoned power and is not greater than the current abandoned power. Therefore, the current abandoned power of the photovoltaic power generation system determines what the only candidate power-consuming device is.

[0055] It is understandable that if the photovoltaic power generation system has a lot of abandoned light before the target power equipment is turned on, the operation of the target power equipment is not enough to absorb all the abandoned light power of the photovoltaic power generation system after the target power equipment is turned on. Therefore, if the photovoltaic power generation system is still in an abandoned light working state after the target power equipment starts running, it indicates that the current abandoned light power of the photovoltaic power generation system is greater than the rated power of the target power equipment: Pwst>Pe, but the current abandoned light power cannot be quantified at this time. In this case, the target power equipment is controlled to continue to operate; based on the continued operation of the target power equipment, the current abandoned light power of the photovoltaic power generation system is partially absorbed, which also improves the utilization efficiency of photovoltaic power generation to a certain extent.

[0056] In order to facilitate understanding of the photovoltaic abandoned light power processing method provided by the embodiment of the present invention, the following reference is made to Figure 2 A specific implementation of the photovoltaic abandoned light power processing method is given, but it is not intended to limit the present invention:

[0057] Step 1: During the operation of the photovoltaic power generation system, monitor whether the photovoltaic power generation system is in a light abandonment state. If yes, perform steps 2 to 4 in sequence:

[0058] Step 2: Obtain the current output power of the photovoltaic power generation system as the first output power P0;

[0059] Step 3: Turn on the heat storage device connected to the photovoltaic power generation system, where the rated power of the heat storage device is Pe;

[0060] Step 4: monitor whether the photovoltaic power generation system is maintained in the abandoned light working state. If yes, execute step 5: the thermal storage device continues to operate; if no, execute step 6;

[0061] Step 6, obtaining the current output power of the photovoltaic power generation system as the second output power P1; calculating the current abandoned light power Pwst = P1-P0 of the photovoltaic power generation system according to the second output power P1 and the first output power P0; then executing the following step 7;

[0062] Step 7: Determine whether Pwst<Pe or Pwst=Pe is satisfied; if Pwst=Pe is satisfied, execute step 5: the thermal storage device continues to operate; if Pwst<Pe is satisfied, execute the following step 8:

[0063] Step 8: turn off the heat storage device, and turn on the electrical equipment connected to the photovoltaic power generation system, whose rated power is less than the current abandoned light power Pwst, or increase the actual operating power of the electrical equipment currently in operation, so that the actual operating power after the increase does not exceed the current abandoned light power.

[0064] It can be seen from the above steps 1 to 8 that the embodiment of the present invention can quickly and accurately measure the abandoned light power of the photovoltaic power generation system, and can improve the utilization efficiency of photovoltaic power generation by absorbing the measured abandoned light power.

[0065] Based on the same inventive concept, an embodiment of the present invention provides a photovoltaic abandoned light power processing device, referring to Figure 3 As shown, the photovoltaic abandoned light power processing device includes: a first acquisition unit 301, used to obtain the first output power of the photovoltaic power generation system in the abandoned light working state; a start unit 302, used to start the target power-consuming equipment connected to the photovoltaic power generation system; a second acquisition unit 303, used to obtain the second output power of the photovoltaic power generation system if the startup operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state; an abandoned light power determination unit 304, used to determine the current abandoned light power of the photovoltaic power generation system according to the first output power and the second output power; and an absorption control unit 305, used to absorb the current abandoned light power using the power-consuming equipment connected to the photovoltaic power generation system.

[0066] It can be understood that the photovoltaic abandoned light power processing device can also include: a first device control unit, which is used to determine that the current abandoned light power of the photovoltaic power generation system is greater than the rated power of the target power equipment if the photovoltaic power generation system continues to maintain the abandoned light working state after the target power equipment is turned on; control the target power equipment to continue to operate, and partially absorb the current abandoned light power of the photovoltaic power generation system based on the continued operation of the target power equipment.

[0067] It can be understood that the absorption control unit 305 may include a second device control unit, which is used to adjust the state of each electrical equipment connected to the photovoltaic power generation system according to the current abandoned light power, so as to at least partially absorb the current abandoned light power of the photovoltaic power generation system.

[0068] It can be understood that the second device control unit may include: a power comparison subunit, used to compare the current abandoned light power with the rated power of the target power-consuming equipment; a first operation control subunit, used to control the target power-consuming equipment to continue to operate if the current abandoned light power is equal to the rated power of the target power-consuming equipment, and to fully absorb the current abandoned light power of the photovoltaic power generation system based on the continued operation of the target power-consuming equipment.

[0069] It can be understood that the second device control unit may also include: a second operation control subunit, used to shut down the target power device if the current abandoned light power is less than the rated power of the target power device; a device determination subunit, used to determine M candidate power devices other than the target power device based on the current abandoned light power, where M is a positive integer; and a device adjustment subunit, used to adjust the operating status of the M candidate power devices so that the actual operating power of the M candidate power devices is not greater than the current abandoned light power.

[0070] It can be understood that the equipment determination subunit can be used to: determine N first-category candidate electrical devices that are not currently in operation, and / or K second-category candidate electrical devices that are currently in operation, based on the current abandoned optical power; wherein N and K are both non-negative integers, and the sum of N and K is equal to M, the first-category candidate electrical devices are devices that require intermittent power supply, and the second-category candidate electrical devices are devices with adjustable operating frequency.

[0071] It can be understood that the equipment adjustment subunit can be used to: control the start-up operation or charging of the N first-category candidate electrical devices, and / or increase the actual operating power of the K second-category candidate electrical devices, so that the sum of the actual operating power of the K second-category candidate electrical devices and the actual operating power of the N first-category candidate electrical devices is not greater than the current abandoned power of the photovoltaic power generation system.

[0072] It can be understood that the equipment adjustment subunit can be used for: if the K second-category candidate electrical equipment currently in operation includes air-conditioning equipment, if the air-conditioning equipment is operating in a cooling condition, increasing the compressor frequency of the air-conditioning equipment; if the air-conditioning equipment is operating in a heating condition, increasing the compressor frequency of the air-conditioning equipment and / or turning on the electric auxiliary heating of the air-conditioning equipment.

[0073] It can be understood that the abandoned light power determination unit 304 is specifically used to: determine the power difference between the first output power and the second output power; and determine the current abandoned light power of the photovoltaic power generation system based on the power difference.

[0074] The specific functions of each functional unit in the above-mentioned device have been described in detail in the photovoltaic abandoned light power processing embodiment provided in the embodiment of the present invention, and will not be elaborated here.

[0075] Based on the same inventive concept, an embodiment of the present invention further provides a central control device, which is connected to the photovoltaic power generation system and each electrical device connected to the photovoltaic power generation system, such as Figure 4As shown, the central control device includes a memory 404, a processor 402, and a computer program stored in the memory 404 and executable on the processor 402. The processor 402 executes the program to implement the steps described in any implementation of the photovoltaic abandoned light power processing embodiment.

[0076] Among them, Figure 4 In the embodiment of the present invention, a bus architecture (represented by bus 400) is shown, which may include any number of interconnected buses and bridges, and bus 400 links various circuits including one or more processors represented by processor 402 and memory represented by memory 404. Bus 400 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 406 provides an interface between bus 400 and receiver 401 and transmitter 403. Receiver 401 and transmitter 403 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 404 may be used to store data used by processor 402 when performing operations.

[0077] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that has the functions specified in one or more boxes.

[0078] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0080] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0081] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0082] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for processing photovoltaic abandoned light power, characterized in that: include: Obtaining a first output power of the photovoltaic power generation system in a light abandonment working state, including: before the target electrical equipment is turned on, monitoring that the actual output power of the photovoltaic power generation system is in a constant state, and obtaining the current output power of the photovoltaic power generation system as the first output power; Turning on the target electrical equipment connected to the photovoltaic power generation system; If the startup operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state, obtaining the second output power of the photovoltaic power generation system includes: identifying that the photovoltaic power generation system is in the MPPT working state, indicating that the startup operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state; after the target power-consuming equipment is started and operated, monitoring that the actual output power of the photovoltaic power generation system is in a constant state, and obtaining the current output power of the photovoltaic power generation system as the second output power; The current abandoned light power of the photovoltaic power generation system is determined according to the first output power and the second output power, and the current abandoned light power is absorbed by the electrical equipment connected to the photovoltaic power generation system.

2. The method according to claim 1, characterized in that The method further comprises: If, after the target electrical equipment is turned on, the photovoltaic power generation system continues to maintain a power abandonment working state, it is determined that the current power abandonment of the photovoltaic power generation system is greater than the rated power of the target electrical equipment; The target power-consuming device is controlled to continue to operate, and the current abandoned light power of the photovoltaic power generation system is partially absorbed based on the continued operation of the target power-consuming device.

3. The method according to claim 1, characterized in that The using the power-consuming equipment connected to the photovoltaic power generation system to absorb the current abandoned light power includes: The states of various electrical devices connected to the photovoltaic power generation system are adjusted according to the current abandoned light power, so as to at least partially absorb the current abandoned light power of the photovoltaic power generation system.

4. The method according to claim 3, characterized in that The step of adjusting the state of each electrical device connected to the photovoltaic power generation system according to the current abandoned light power includes: Comparing the current abandoned optical power with the rated power of the target electrical equipment; If the current abandoned light power is equal to the rated power of the target power-consuming device, the target power-consuming device is controlled to continue to operate, and the current abandoned light power of the photovoltaic power generation system is fully absorbed based on the continued operation of the target power-consuming device.

5. The method according to claim 4, characterized in that After comparing the current abandoned optical power with the rated power of the target electrical equipment, the method further includes: If the current abandoned optical power is less than the rated power of the target electric device, shut down the target electric device; Determine M candidate power-consuming devices other than the target power-consuming device according to the current abandoned optical power, where M is a positive integer; The operating states of the M candidate electrical devices are adjusted so that the actual operating powers of the M candidate electrical devices are not greater than the current abandoned optical power.

6. The method according to claim 5, characterized in that The determining, according to the current abandoned optical power, M candidate electric devices other than the target electric device comprises: Determine, according to the current abandoned optical power, N first-category candidate electrical devices that are not currently in operation, and / or K second-category candidate electrical devices that are currently in operation; Among them, N and K are both non-negative integers, and the sum of N and K is equal to M. The first category of candidate electrical equipment is equipment that requires intermittent power supply, and the second category of candidate electrical equipment is equipment with adjustable operating frequency.

7. The method according to claim 6, characterized in that The adjusting the operating states of the M candidate electrical devices includes: Control the startup operation or charging of the N first-category candidate electrical devices, and / or increase the actual operating power of the K second-category candidate electrical devices, so that the sum of the actual operating power of the K second-category candidate electrical devices and the actual operating power of the N first-category candidate electrical devices is not greater than the current abandoned power of the photovoltaic power generation system.

8. The method according to claim 7, characterized in that If the K second-category candidate electrical devices currently in operation include air conditioning equipment, the step of increasing the actual operating power of the K second-category candidate electrical devices includes: If the air conditioning device is operating in a cooling state, increasing the compressor frequency of the air conditioning device; If the air-conditioning device is operating in a heating condition, the compressor frequency of the air-conditioning device is increased and / or the electric auxiliary heating of the air-conditioning device is turned on.

9. The method according to any one of claims 1 to 8, characterized in that: The determining the current abandoned light power of the photovoltaic power generation system according to the first output power and the second output power includes: determining a power difference between the first output power and the second output power; The current abandoned power of the photovoltaic power generation system is determined based on the power difference.

10. A photovoltaic abandoned light power processing device, characterized in that: include: A first power acquisition unit is used to acquire a first output power of the photovoltaic power generation system in a light abandonment working state, including: before the target electrical equipment is turned on, monitoring that the actual output power of the photovoltaic power generation system is in a constant state, and acquiring the current output power of the photovoltaic power generation system as the first output power; An equipment starting unit, used to start a target electrical equipment connected to the photovoltaic power generation system; A second power acquisition unit is used to acquire the second output power of the photovoltaic power generation system if the startup operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state, including: identifying that the photovoltaic power generation system is in the MPPT working state, indicating that the startup operation of the target power-consuming equipment causes the photovoltaic power generation system to exit the abandoned light working state; after the target power-consuming equipment is started and operated, it is monitored that the actual output power of the photovoltaic power generation system is in a constant state, and the current output power of the photovoltaic power generation system is acquired as the second output power; an abandoned light power determination unit, configured to determine a current abandoned light power of the photovoltaic power generation system according to the first output power and the second output power; The absorption control unit is used to absorb the current abandoned light power by using the power-consuming equipment connected to the photovoltaic power generation system.

11. A central control device, characterized in that: The central control device is connected to the photovoltaic power generation system and each electrical device connected to the photovoltaic power generation system. The central control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of any one of the methods described in claims 1-9 are implemented.

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