Power supply adjustment method, power supply equipment and storage medium

Abstract

The invention relates to the technical field of photovoltaic power supply, in particular to a power supply adjusting method, power supply equipment and a storage medium. The power supply adjusting method is applied to an inverter power supply system, and the system comprises an inverter assembly which comprises an inverter, a photovoltaic panel and an energy storage battery pack, and local loads which comprise a main load and a secondary load; the commercial power assembly comprises a power grid and a household load; the power supply adjusting method comprises the following steps: acquiring the local power of a local load and the maximum support power of an inverter assembly; obtaining the maximum power grid bypass power of the inverter power supply system, and selecting one of the maximum support power and the maximum power grid bypass power as target power according to the connection state of the commercial power assembly; when the local power exceeds the target power, stopping supplying power to the secondary load; and when the proportion of the main power of the main load in the target power is lower than a preset proportion, power supply to the secondary load is recovered. The energy utilization efficiency can be improved, and meanwhile the stability and safety of the system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power supply, and in particular to a power supply regulation method, power supply equipment and storage medium. Background Art

[0002] With the growth of photovoltaic power generation installed capacity and the popularity of distributed power generation systems, the demand for inverters in the market continues to increase. Traditional photovoltaic grid-connected inverters have some limitations when there are multiple loads at the load end, and cannot effectively manage the power supply of each load. Current photovoltaic grid-connected inverters power loads by connecting multiple loads in parallel to the grid.

[0003] In traditional photovoltaic grid-connected systems, the inverter connects multiple loads in parallel to the grid, which means that all loads share the same power supply. Therefore, all loads have the same power supply. In the event of system overload or insufficient power supply, it will not be able to cope with power fluctuations and instability, which may cause voltage fluctuations, frequency anomalies and other problems, affecting the normal operation of the entire inverter power supply system. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a power supply adjustment method, a power supply device and a storage medium to solve the problem in the prior art that the inverter power supply system may not be able to operate normally when the system is overloaded or the power supply is insufficient.

[0005] The present invention discloses a power supply regulation method, which is applied to an inverter power supply system. The inverter power supply system comprises:

[0006] An inverter assembly, comprising: an inverter and a photovoltaic panel and an energy storage battery group connected to the inverter, wherein the inverter is used to output the power provided by the photovoltaic panel and the energy storage battery group;

[0007] Local loads, including primary loads and secondary loads connected to the output terminal of the inverter;

[0008] A mains power component, including a power grid and a household load, wherein the power grid and the household load are connected in parallel and then connected to an output end of the inverter;

[0009] The power supply adjustment method comprises:

[0010] Acquire the local power of the local load and the maximum supported power of the inverter assembly;

[0011] Acquire the maximum grid bypass power of the inverter power supply system, and select one of the maximum supported power and the maximum grid bypass power as the target power according to the connection status of the mains component;

[0012] When the local power exceeds the target power, stopping supplying power to the secondary load;

[0013] When the proportion of the main power of the main load to the target power is lower than a preset proportion, power supply to the secondary load is restored.

[0014] Optionally, after the step of stopping supplying power to the secondary load, the step further comprises:

[0015] When the main power exceeds the target power, power supply to the local load is stopped, and power supply to the local load is resumed after a preset time period.

[0016] Optionally, the step of stopping supplying power to the secondary load includes:

[0017] Obtaining a maximum operating time of the inverter power supply system at the maximum supported power, setting a first target operating time and a second target operating time, wherein both the first target operating time and the second target operating time do not exceed half of the maximum operating time;

[0018] When the local power exceeds the target power, stopping supplying power to the secondary load after the first target operating time has elapsed;

[0019] The step of stopping power supply to the local load comprises:

[0020] Within the second target operation time after stopping supplying power to the secondary load, when the main power exceeds the target power, stopping supplying power to the local load.

[0021] Optionally, when the connection state of the mains power component is connected to the inverter power supply system, the target power is the maximum grid bypass power;

[0022] After the step of obtaining the current local power of the local load and the maximum supported power of the inverter assembly, the method further comprises:

[0023] When the local power exceeds the maximum supported power, the inverter assembly and the power grid supply power to the local load, and the power grid supplies power to the household load.

[0024] Optionally, the step of stopping power supply to the local load includes:

[0025] supplying power to the household load via the power grid;

[0026] The step of stopping supplying power to the secondary load also includes:

[0027] The household load is powered by the power grid.

[0028] Optionally, after the step of acquiring the current local power of the local load and the maximum supported power of the inverter assembly, the step further includes:

[0029] When the local power does not exceed the maximum supported power, the inverter component supplies power to the local load, and transmits the remaining power after the inverter component performs the power supply operation to the mains component; or

[0030] The household power of the household load is obtained. When the sum of the local power and the household power does not exceed the maximum supported power, the inverter component supplies power to the local load and the household load, and transmits the remaining power after the inverter component performs the power supply operation to the power grid.

[0031] Optionally, when the connection state of the AC power component is not connected to the inverter power supply system, the target power is the maximum supported power.

[0032] Optionally, after the step of acquiring the current local power of the local load and the maximum supported power of the inverter assembly, the step further includes:

[0033] When the local power does not exceed the maximum supported power, the inverter assembly supplies power to the local load.

[0034] The present invention also discloses a power supply device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0035] The present invention also discloses a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps of the method described above.

[0036] Compared with the prior art, the power supply regulation method provided by the embodiment of the present invention has the beneficial effect of: selecting one from the maximum supported power and the maximum grid bypass power as the target power according to the connection status of the AC power component, and stopping or resuming power supply to the secondary load in the local load according to the target power control, and can flexibly adjust the target power according to actual conditions to maximize the use of system resources. When the local power exceeds the target power, the power supply to the secondary load is stopped in time to avoid system overload, and the power supply to the secondary load is restored when the main power of the main load is lower than the preset ratio. The power supply situation can be flexibly adjusted to make full use of the power that can be provided by the inverter component, improve energy utilization efficiency, and at the same time improve the stability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The scheme of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0038] Figure 1 is a flow chart of a first embodiment of a power supply adjustment method provided by the present invention;

[0039] Figure 2 It is a structural schematic diagram of an embodiment of an inverter power supply system provided by the present invention;

[0040] Figure 3 is a flow chart of a second embodiment of the power supply adjustment method provided by the present invention;

[0041] Figure 4 is a flow chart of a third embodiment of the power supply adjustment method provided by the present invention;

[0042] Figure 5 It is a flowchart diagram of a fourth embodiment of the power supply adjustment method provided by the present invention.

[0043] The reference numerals in the figures are:

[0044] 10. Inverter power supply system; 11. Inverter components; 111. Inverter; 112. Photovoltaic panels; 113. Energy storage battery pack; 12. Local load; 121. Main load; 122. Secondary load; 13. AC power components; 131. Power grid; 132. Household load. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present invention is described in detail.

[0046] Please refer to Figure 1 and Figure 2 , Figure 1 is a flow chart of a first embodiment of a power supply adjustment method provided by the present invention, Figure 2 It is a structural schematic diagram of an embodiment of the inverter power supply system provided by the present invention.

[0047] like Figure 2 The inverter power supply system 10 shown includes: an inverter assembly 11, a local load 12 and a mains assembly 13. The inverter assembly 11 includes an inverter 111 and a photovoltaic panel 112 and an energy storage battery group 113 respectively connected to the inverter 111. The photovoltaic panel 112 can convert solar energy into direct current power. The energy storage battery 113 is used to store the power generated by the photovoltaic panel 112 and release the direct current power when needed. The inverter 111 is used to convert direct current power into alternating current power.

[0048] Both the local load 12 and the mains component 13 can be connected to the inverter component 11 through a switch. Specifically, the local load 12 includes a main load 121 and a secondary load 122 connected to the output end of the inverter 111 through a first switch S1 and a second switch S2, respectively, so that the main load 121 and the secondary load 121 can be in a connected or disconnected state with the inverter component 11. The mains component 13 includes a power grid 131 and a household load 132 connected in parallel. After the power grid 131 and the household load 132 are connected in parallel, they are connected to the output end of the inverter 111 through a third switch S3, so that when the third switch is in a disconnected state, the entire mains component 13 is disconnected from the inverter component 11.

[0049] The power supply adjustment method provided by the present invention comprises the following steps:

[0050] S101: Obtain the current local power of the local load and the maximum supported power of the inverter component.

[0051] In a specific implementation scenario, local power refers to the power currently consumed by the system. The calculation of local power is obtained by adding the current primary power of the primary load and the current secondary power of the secondary load. The primary load usually refers to the load that consumes more power or has priority power supply in the system, and the secondary load refers to the load that consumes less power or has secondary power supply. By adding the power of the two, the local power of the current system can be obtained.

[0052] The maximum supported power of the inverter component refers to the maximum output power that the inverter can currently support. The maximum output power of the photovoltaic panel and the maximum discharge power of the energy storage battery pack are added to obtain a candidate power. The power limit is obtained based on the hardware circuit parameters of the inverter itself. It can be 1.2 times the rated power of the inverter or the power limited by 1.2 times the rated current. If the candidate power does not exceed the power limit, the candidate power is used as the maximum output power. If the candidate power exceeds the power limit, the maximum power allowed by the power limit is used as the maximum output power. The maximum output power of the photovoltaic panel refers to the maximum power that the photovoltaic panel can output under the best lighting conditions, while the maximum discharge power of the energy storage battery pack refers to the maximum power that the battery pack can continuously release.

[0053] S102: Acquire a maximum grid bypass power of the inverter power supply system, and select one from the maximum supported power and the maximum grid bypass power as a target power according to the connection status of the mains component.

[0054] In a specific implementation scenario, the maximum grid bypass power of the inverter power supply system refers to the maximum output power that the inverter component can provide when the mains component is connected to the inverter power supply system, that is, when the grid is bypassed. The maximum power that the inverter component can provide in the grid bypass mode must be within the allowable range of the grid to avoid causing instability or unsafe effects on the grid. The maximum grid bypass power can be preset according to the specific parameters of the grid.

[0055] According to the connection status of the AC power component, select one of the maximum supported power and the maximum grid bypass power as the target power. If the AC power component is connected to the inverter power supply system, the grid's bearing capacity needs to be considered, so the target power should select the maximum grid bypass power. This is because in this case, the inverter component needs to work in the grid bypass mode to ensure that its output power does not have a negative impact on the grid, while also making full use of the inverter component's output capacity.

[0056] If the AC power component is not connected to the inverter power supply system, there is no need to consider the grid's bearing capacity, because the inverter component will not be connected to the grid, but will work independently. In this case, the target power should select the maximum supported power to ensure that the inverter component can provide its maximum output power when operating independently to meet the needs of the system's internal load.

[0057] S103: When the local power exceeds the target power, stop supplying power to the secondary load.

[0058] In a specific implementation scenario, when the local power exceeds the target power, the power supply to the secondary load is stopped, and the power supply to the primary load is supplied, which can ensure that the system can still maintain the power supply to the primary load when the local power exceeds the target power, while avoiding overload and potential system failure. By stopping the power supply to the secondary load, the needs of the primary load can be met, thereby keeping the system within the safe operating range and ensuring the stability and reliability of the inverter power supply system. In this way, the safety of the inverter power supply system can be protected, while meeting the needs of the primary load and improving the efficiency and stability of the system.

[0059] S104: When the proportion of the main power of the main load to the target power is lower than a preset proportion, power supply to the secondary load is restored.

[0060] In a specific implementation scenario, after stopping power supply to the secondary load, for the local load, the inverter component only supplies power to the main load, and when the proportion of the main power of the main load to the target power is lower than the preset ratio (for example, 0.15), the power supply to the secondary load is restored. This is because, when the main power / target power < the preset ratio, it can be considered that there is still a lot of electric energy before, and the secondary load can be powered. In this way, the secondary load can also get proper power supply, which helps to avoid load imbalance. Dynamically adjusting the power supply strategy according to the actual power demand of the main load can make the power supply more flexible and adaptable, and can better cope with load changes and fluctuations in system demand, ensuring that the inverter power supply system can operate efficiently under different power supply demands of local loads. It can also make more full use of the electric energy of the inverter power supply system, improve energy utilization efficiency, help reduce energy waste, optimize energy utilization, and reduce system operating costs.

[0061] It is understandable that once power supply to the secondary load is restored, step S103 will be repeated. If the local power exceeds the target power, power supply to the secondary load will be stopped. If the local power does not exceed the target power, power supply to the primary load and the secondary load will continue.

[0062] The preset ratio can be set according to the actual situation of the local load to ensure that once the power supply to the secondary load is restored, overload or other adverse conditions will not occur. The preset ratio can be lower than 0.5, for example 0.15.

[0063] It can be seen from the above description that in this embodiment, one is selected as the target power from the maximum supported power and the maximum grid bypass power according to the connection status of the AC power component, and the power supply to the secondary load in the local load is stopped or restored according to the target power control. The target power can be flexibly adjusted according to the actual situation to maximize the use of system resources. When the local power exceeds the target power, the power supply to the secondary load is stopped in time to avoid system overload. When the main power of the main load is lower than the preset ratio, the power supply to the secondary load is restored. The power supply situation can be flexibly adjusted to make full use of the power that can be provided by the inverter component, improve energy utilization efficiency, and at the same time improve the stability and safety of the system.

[0064] Please refer to Figure 3 , Figure 3 1 is a flow chart of a second embodiment of the power supply adjustment method provided by the present invention. The power supply adjustment method provided by the present invention comprises the following steps:

[0065] S201: Obtain the local power of the local load and the maximum supported power of the inverter component.

[0066] S202: Acquire a maximum grid bypass power of the inverter power supply system, and select one from the maximum supported power and the maximum grid bypass power as a target power according to the connection status of the mains component.

[0067] S203: When the local power exceeds the target power, stop supplying power to the secondary load.

[0068] In a specific implementation scenario, steps S201-S203 are substantially consistent with steps S101-S103 in the first embodiment of the power supply adjustment method provided by the present invention, and are not described in detail herein.

[0069] S204: When the main power exceeds the target power, stop supplying power to the local load, and resume supplying power to the local load after a preset time.

[0070] In a specific implementation scenario, after stopping power supply to the secondary load, if the main power of the main load also exceeds the target power, the inverter power supply system is still in an overloaded state, so the power supply to the local load is stopped to reduce the load of the inverter system and avoid overload or other problems. After stopping power supply to the local load, a preset period of time (for example, 30 minutes) will be waited, and then the power supply to the local load (including the main load and the secondary load) will be restored. This preset time can be set according to the characteristics and requirements of the inverter power supply system to ensure that the inverter power supply system can smoothly transition when power supply is restored, avoid sudden load changes causing system instability, and ensure that when power supply is restored, the local load has been reduced to minimize damage to the inverter power supply system. It can be understood that after the power supply to the local load is restored, step S201 and subsequent steps are repeated to ensure the power safety of the entire inverter power supply system.

[0071] In other implementation scenarios, it is necessary to determine the maximum operating time that the inverter power supply system can continuously operate under the maximum supported power of the inverter assembly. This time length indicates that the inverter power supply system can continuously operate under the maximum load without being overloaded or damaged. The first target operating time and the second target operating time are set, and the first target operating time and the second target operating time are both no more than half of the maximum operating time. For example, the first target operating time and the second target time are both half of the maximum operating time.

[0072] When it is detected that the local power exceeds the set target power, it indicates that the inverter power supply system is currently in an overload state. The inverter power supply will continue to run for a period of time, for example, after the target operation time, stop supplying power to the secondary load to reduce the load of the system, ensure that the system operates within a safe range, and avoid overload or other potential problems. By stopping the supply of power to the secondary load after the first target operation time, there can be a buffer period when the target power is exceeded to ensure a smooth transition and avoid sudden power outages or system instability.

[0073] After stopping the power supply to the secondary load, the main power is monitored during the second target operation time. If the main power exceeds the target power, the power supply to the local load will be stopped. Because when the local power and the main power exceed the target power, the inverter component outputs at the maximum output power that can be supported at present. If the inverter component runs at the maximum output power for a period of time exceeding the maximum operation time, it may cause damage to the inverter component. Therefore, the first target operation time and the second target operation time are not more than half of the maximum operation time, which can ensure that the inverter component is in a safe working state and will not operate overtime or overload.

[0074] It can be seen from the above description that in this embodiment, when the main power exceeds the target power, the power supply to the local load is stopped to avoid overload of the system when the main power exceeds the target power. This helps to maintain the stability and reliability of the system. After a preset period of time, the power supply to the local load is restored. After the local load exceeds the target power, the power supply to the local load can be gradually restored, which can optimize energy distribution and ensure that the system can still operate effectively after the power supply is restored.

[0075] See also Figure 4 , Figure 4 It is a flow chart of the third embodiment of the power supply regulation method provided by the present invention. In this embodiment, the connection state of the mains component is connected to the inverter power supply system, so the target power is the maximum grid bypass power. The loads that the inverter power supply system needs to bear include local loads (primary loads and secondary loads) and household loads.

[0076] The power supply adjustment method provided by the present invention comprises the following steps:

[0077] S301: Obtain the local power of the local load and the maximum supported power of the inverter component.

[0078] In a specific implementation scenario, step S301 is substantially consistent with step S101 in the first embodiment of the power supply adjustment method provided by the present invention, and will not be described in detail herein.

[0079] S302: Determine whether the local power exceeds the maximum supported power, if yes, execute step S303. If no, execute step S304 or S305.

[0080] S303: The inverter assembly and the power grid supply power to the local load, and the power grid supplies power to the household load.

[0081] In a specific implementation scenario, when the local power exceeds the maximum supported power, the power output by the inverter assembly cannot meet the needs of the local load, and the power on the grid can also be transmitted to the local load to maintain the operation of the local load. The remaining power on the grid is used to power the household load to maintain the operation of the household load.

[0082] Specifically, when the inverter power supply system starts, if the local power exceeds the maximum supported power of the inverter component, the local load is powered by the grid and the inverter component together. Assume that the power provided by the grid to the local load is P GridToUpsLoad , the maximum supported power is P InvMax , the power supply from the grid to the household load is P InvToHomeGrid , the local load is P UpsLoad , the maximum output power of the photovoltaic panel is P Pv ; The discharge power of the energy storage battery pack is P BatDchg , the output power of the inverter is P Inv =P Pv +P batDchg , then the power grid supplies power P to the local load GridToUpsLoad =(P UpsLoad -P Inv ), the power supply P of the grid to the household load HomeLoad =(P Grid -P GridToUpsLoad ).

[0083] S304: The inverter component supplies power to the local load, and transmits the remaining power after the inverter component performs the power supply operation to the mains component.

[0084] In a specific implementation scenario, when the local power does not exceed the maximum supported power, the inverter component can meet all power supply needs of the local load, so the inverter component supplies power to the local load. If the remaining power of the inverter component after supplying power to the local load is insufficient to supply power to the household load, the remaining power can be transmitted to the mains component to supply power to the household load together with the power grid, thereby ensuring that the power in the inverter component can be fully used and improving energy utilization.

[0085] S305: The inverter assembly supplies power to the local load and the household load, and transmits the remaining power after the inverter assembly performs the power supply operation to the power grid.

[0086] In a specific implementation scenario, the household power of the household load is obtained. When the sum of the local power and the household power does not exceed the maximum supported power, the inverter component can supply power to the local load and the household load at the same time, making full use of the power supply capacity of the inverter component to ensure that both the local and household loads can get a stable power supply. After the inverter component meets the needs of the local load and the household load, the remaining power can be transmitted to the power grid, which helps to maximize the use of the power generated by the system and improve energy efficiency.

[0087] S306: Determine whether the local power exceeds the maximum grid bypass power, if so, execute step S307.

[0088] S307: Stop supplying power to the secondary loads, and supply power to the household loads through the power grid.

[0089] In a specific implementation scenario, when the local power exceeds the maximum grid bypass power, the inverter assembly stops supplying power to the secondary loads and supplies power to the primary loads, and when the power supply to the secondary loads is stopped, the grid is used to supply power to the household loads, thereby ensuring that the household loads can still receive stable power supply when the local loads are overloaded.

[0090] S308: Determine whether the main power exceeds the maximum grid bypass power, if so, execute step S309, if not, execute step S310.

[0091] S309: Stop supplying power to local loads, supply power to household loads through the power grid, and resume supplying power to local loads after a preset period of time.

[0092] In a specific implementation scenario, after stopping power supply to the secondary load, the inverter assembly only supplies power to the main load. If the main power of the main load exceeds the maximum grid bypass power, the power supply of the inverter assembly cannot meet the power demand of the main load, and the inverter power supply system is still in an overloaded state. Therefore, the power supply to the local load is stopped to reduce the inverter system load and avoid overload or other problems. Providing power to household loads through the grid can ensure that household loads can still get stable power supply when the local load is overloaded.

[0093] After stopping the power supply to the local load, it will wait for a preset period of time (for example, 30 minutes) and then resume the power supply to the local load (including the main load and the secondary load). This preset period can be set according to the characteristics and requirements of the inverter power supply system to ensure that the inverter power supply system can smoothly transition when the power supply is restored, avoiding sudden load changes that cause system instability, and also ensuring that when the power supply is restored, the local load has been reduced to minimize the damage to the inverter power supply system.

[0094] S310: Determine whether the proportion of the main power of the main load to the maximum grid bypass power is lower than a preset proportion, if so, execute step S311, if not, execute step S307.

[0095] S311: Restore power supply to the secondary loads.

[0096] In a specific implementation scenario, when the inverter assembly only supplies power to the main load, the proportion of the main power of the main load to the maximum grid bypass power is obtained. When the proportion is lower than a preset proportion (for example, 0.15), the power supply to the secondary load is restored. This is because when the main power / target power < the preset proportion, it can be considered that there is still a lot of electric energy before, and the secondary load can be powered, so that the secondary load can also be properly powered, which helps to avoid load imbalance.

[0097] If the proportion is higher than the preset ratio, the power supply to the secondary load will continue to be stopped, and the household load will be powered by the power grid to avoid excessive local load after powering the secondary load and the local power exceeding the maximum grid bypass power, thereby ensuring the safety and stability of the inverter power supply system.

[0098] See also Figure 5 , Figure 5 It is a flow chart of the fourth embodiment of the power supply regulation method provided by the present invention. In this embodiment, the connection state of the mains component is not connected to the inverter power supply system, that is, the power grid and the household load are not connected to the inverter power supply system. Therefore, the target power is the maximum supported power. The loads that the inverter power supply system needs to bear include local loads (primary loads and secondary loads).

[0099] The power supply adjustment method provided by the present invention comprises the following steps:

[0100] S401: Obtain the local power of the local load and the maximum supported power of the inverter component.

[0101] In a specific implementation scenario, step S401 is substantially consistent with step S101 in the first embodiment of the power supply adjustment method provided by the present invention, and will not be described in detail herein.

[0102] S402: Determine whether the local power exceeds the maximum supported power, if so, execute step S404. If not, execute step S403.

[0103] S403: The inverter assembly supplies power to the local load normally.

[0104] In a specific implementation scenario, if the local power does not exceed the maximum supported power, the inverter assembly will continue to supply power to the local load normally. If the inverter power supply system is within the normal operating range and there is no power overload or other abnormal conditions, the inverter assembly will continue to provide power to the local load stably to ensure the normal operation of the local load.

[0105] S404: The inverter assembly stops supplying power to the secondary load and only supplies power to the primary load.

[0106] In a specific implementation scenario, when the local power exceeds the maximum supported power, the inverter component stops supplying power to the secondary load and supplies power to the primary load, thereby avoiding system failure caused by overload while maintaining normal operation of the primary load.

[0107] S405: Determine whether the main power exceeds the maximum supported power, if so, execute step S406, if not, execute step S407.

[0108] S406: Stop supplying power to the local load, and resume supplying power to the local load after a preset time.

[0109] In a specific implementation scenario, after the power supply to the secondary load is stopped, the inverter assembly only supplies power to the primary load. If the primary power of the primary load exceeds the maximum supported power, the power supply of the inverter assembly cannot meet the power demand of the primary load, and the inverter power supply system is still in an overloaded state. Therefore, the power supply to the local load is stopped to reduce the load of the inverter system and avoid overload or other problems. After the power supply to the local load is stopped, a preset period of time (for example, 30 minutes) will be waited, and then the power supply to the local load (including the primary load and the secondary load) will be restored.

[0110] S407: Determine whether the proportion of the main power of the main load to the maximum supported power is lower than a preset proportion, if so, execute step S408, if not, execute step S404.

[0111] S408: Restore power supply to the secondary load.

[0112] In a specific implementation scenario, when the inverter assembly only supplies power to the main load, the proportion of the main power of the main load to the maximum supported power is obtained. When the proportion is lower than a preset proportion (for example, 0.15), the power supply to the secondary load is restored. This is because when the main power / maximum supported power < the preset proportion, it can be considered that there is still a lot of electric energy before, and the secondary load can be powered, so that the secondary load can also be properly powered, which helps to avoid load imbalance.

[0113] If the proportion is higher than the preset ratio, the power supply to the secondary load will continue to be stopped, and the household load will be powered by the power grid to avoid excessive local load after powering the secondary load and the local power exceeding the maximum supported power, thereby ensuring the safety and stability of the inverter power supply system.

[0114] The present invention also provides a power supply device. The power supply device includes a processor and a memory. The processor is coupled to the memory. A computer program is stored in the memory, and the processor executes the computer program when working to implement the above method. The detailed steps can be found above and will not be repeated here.

[0115] The present invention also provides a computer-readable storage medium in which at least one computer program is stored, and the computer program is used to be executed by a processor to implement the above method. The detailed steps can be referred to above and will not be repeated here. In one embodiment, the computer-readable storage medium can be a storage chip, a hard disk, or a mobile hard disk or a USB flash drive, an optical disk, or other readable and writable storage tools in a terminal, or a server, etc.

[0116] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0117] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A power supply adjustment method, characterized in that: Applied to an inverter power supply system, the inverter power supply system comprises: An inverter assembly, comprising: an inverter and a photovoltaic panel and an energy storage battery group connected to the inverter, wherein the inverter is used to output the power provided by the photovoltaic panel and the energy storage battery group; Local loads, including primary loads and secondary loads connected to the output terminal of the inverter; A mains power component, including a power grid and a household load, wherein the power grid and the household load are connected in parallel and then connected to an output end of the inverter; The power supply adjustment method comprises: Acquire the local power of the local load and the maximum supported power of the inverter assembly; Acquire the maximum grid bypass power of the inverter power supply system, and select one of the maximum supported power and the maximum grid bypass power as the target power according to the connection status of the mains component; When the local power exceeds the target power, stopping supplying power to the secondary load; When the proportion of the main power of the main load to the target power is lower than a preset proportion, power supply to the secondary load is restored.

2. The power supply adjustment method according to claim 1, characterized in that: After the step of stopping supplying power to the secondary load, the method further comprises: When the main power exceeds the target power, power supply to the local load is stopped, and power supply to the local load is resumed after a preset time period.

3. The power supply adjustment method according to claim 2, characterized in that: The step of stopping supplying power to the secondary load comprises: Obtaining a maximum operating time of the inverter power supply system at the maximum supported power, setting a first target operating time and a second target operating time, wherein both the first target operating time and the second target operating time do not exceed half of the maximum operating time; When the local power exceeds the target power, stopping supplying power to the secondary load after the first target operating time interval; The step of stopping power supply to the local load comprises: Within the second target operation time after stopping supplying power to the secondary load, when the main power exceeds the target power, stopping supplying power to the local load.

4. The power supply adjustment method according to any one of claims 2 to 3, characterized in that: When the connection state of the mains component is connected to the inverter power supply system, the target power is the maximum grid bypass power; After the step of obtaining the current local power of the local load and the maximum supported power of the inverter assembly, the method further comprises: When the local power exceeds the maximum supported power, the inverter assembly and the power grid supply power to the local load, and the power grid supplies power to the household load.

5. The power supply adjustment method according to claim 4, characterized in that: The step of stopping power supply to the local load includes: supplying power to the household load via the power grid; The step of stopping supplying power to the secondary load also includes: The household load is powered by the power grid.

6. The power supply adjustment method according to claim 5, characterized in that: After the step of obtaining the current local power of the local load and the maximum supported power of the inverter assembly, the method further includes: When the local power does not exceed the maximum supported power, the inverter component supplies power to the local load, and transmits the remaining power after the inverter component performs the power supply operation to the mains component; or The household power of the household load is obtained. When the sum of the local power and the household power does not exceed the maximum supported power, the inverter component supplies power to the local load and the household load, and transmits the remaining power after the inverter component performs the power supply operation to the power grid.

7. The power supply adjustment method according to any one of claims 1 to 3, characterized in that: When the connection state of the mains power component is not connected to the inverter power supply system, the target power is the maximum supported power.

8. The power supply adjustment method according to claim 7, characterized in that: After the step of obtaining the current local power of the local load and the maximum supported power of the inverter assembly, the method further includes: When the local power does not exceed the maximum supported power, the inverter assembly supplies power to the local load.

9. A power supply device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 8.

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