Power adjustment method and device, storage medium and program product

Abstract

The invention discloses a power adjustment method and device, a storage medium and a program product, and belongs to the technical field of computers. The method comprises the steps of obtaining first state information of an energy storage system when it is detected that first power is smaller than preset power, wherein the first power is current load power of a grid-connected point of a microgrid; and obtaining one or more pieces of second state information of the energy storage system when the first state information is in discharging or charging. And adjusting the operation power of the energy storage system according to the first state information, the one or more pieces of second state information and preset power so as to realize the adjustment of the load power of the grid-connected point. According to the invention, when a reverse power risk exists, the probability of a reverse power phenomenon can be reduced by dynamically adjusting the load power of the grid-connected point. The anti-reflux device does not need to be installed and maintained, so that the cost can be saved. Moreover, the operation power of the energy storage system is adjusted preferentially, so that the influence on the power generation system can be avoided as much as possible, and the electric energy utilization rate of the power generation system is ensured.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a power adjustment method, device, storage medium and program product. Background Art

[0002] With the rapid development of renewable energy, the method of connecting microgrids to the public grid for power supply has gradually become popular. Microgrids include power generation systems and energy storage systems. When the public grid fails, the power generation system and / or energy storage system can be used for power supply. During the grid-connected operation, the total power supply of the power generation system and the energy storage system may be greater than the local load consumption. In this case, the excess electric energy will flow back into the public grid, that is, reverse power phenomenon will occur, thereby causing damage to the public grid. In the related art, the reverse flow of electric energy is prevented by installing an anti-backflow device. However, the installation and maintenance costs of the anti-backflow device are high. Summary of the invention

[0003] The present application provides a power adjustment method, device, storage medium and program product, which can prevent reverse power phenomenon and reduce costs. The technical solution is as follows:

[0004] In a first aspect, a power adjustment method is provided, which is applied to a microgrid, and the method comprises:

[0005] When it is detected that the first power is less than the preset power, first state information is obtained, where the first power is the current load power of the grid connection point of the microgrid, and the first state information is the state information of the energy storage system in the microgrid;

[0006] When the first state information is discharging or charging, obtaining one or more second state information, wherein the one or more second state information corresponds one to one with one or more energy storage devices in the energy storage system;

[0007] The operating power of the energy storage system is adjusted according to the first state information, the one or more second state information and the preset power to adjust the load power of the grid connection point.

[0008] In the present application, when it is detected that the first power is less than the preset power, the first state information is obtained, the first power is the current load power of the grid connection point of the microgrid, and the first state information is the state information of the energy storage system in the microgrid. Afterwards, when the first state information is discharging or charging, one or more second state information is obtained, and the one or more second state information corresponds to one or more energy storage devices in the energy storage system. Finally, the operating power of the energy storage system is adjusted according to the first state information, the one or more second state information and the preset power to adjust the load power of the grid connection point. In this way, when there is a risk of reverse power, the probability of reverse power phenomenon can be reduced by dynamically adjusting the load power of the grid connection point. Since there is no need to install and maintain an anti-backflow device, costs can be saved. In addition, since the operating power of the energy storage system is adjusted first, the impact on the power generation system can be avoided as much as possible to ensure the power utilization rate of the power generation system.

[0009] In a second aspect, a power adjustment device is provided, the device comprising:

[0010] A first determination module is used to obtain first status information when it is detected that the first power is less than a preset power, wherein the first power is the current load power of the grid connection point of the microgrid, and the first status information is status information of the energy storage system in the microgrid;

[0011] A second determination module is used to obtain one or more second state information when the first state information is discharging or charging, and the one or more second state information corresponds to one or more energy storage devices in the energy storage system;

[0012] An adjustment module is used to adjust the operating power of the energy storage system according to the first state information, the one or more second state information and the preset power, so as to adjust the load power of the grid connection point.

[0013] In a third aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the power adjustment method described in the first aspect when executed by the processor.

[0014] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the power adjustment method described in the first aspect is implemented.

[0015] In a fifth aspect, a computer program product is provided. When the computer program product is executed on a computer device, the computer device executes the power adjustment method described in the first aspect.

[0016] It can be understood that the beneficial effects of the second, third, fourth and fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic diagram of a microgrid provided in an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of a power adjustment system provided in an embodiment of the present application;

[0020] Figure 3 is a flow chart of a power adjustment method provided in an embodiment of the present application;

[0021] Figure 4 is a flow chart of another power adjustment method provided in an embodiment of the present application;

[0022] Figure 5 is a structural schematic diagram of a power adjustment device provided in an embodiment of the present application;

[0023] Figure 6 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0025] It should be understood that the "multiple" mentioned in this application refers to two or more. In the description of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solution of this application, the words "first" and "second" are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be different.

[0026] The phrases such as "one embodiment" or "some embodiments" described in the present application mean that the specific features, structures or characteristics described in the embodiment are included in one or more embodiments of the present application. Therefore, the phrases such as "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments" that appear in the differences in the present application do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, the terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0027] The microgrid provided in the embodiment of the present application is described below.

[0028] Figure 1 Schematic diagram of a microgrid provided in an embodiment of the present application. Figure 1 , the microgrid 10 may include a power generation system, an energy storage system, and multiple loads.

[0029] For example, the microgrid 10 may be a microgrid in an industrial park, or may be a microgrid in a residential area, which is not limited in the embodiments of the present application.

[0030] The power generation system is a system for generating electricity, and the power generation system can supply power to the energy storage system and the multiple loads. For example, the power generation system can be a distributed power generation system. For example, the power generation system can be a photovoltaic power generation system, a hydropower generation system, a wind power generation system, etc., which is not limited in the embodiments of the present application.

[0031] The energy storage device is used for storing electric energy and supplying power to the multiple loads.

[0032] The load is a device that consumes electrical energy, that is, an electrical device.

[0033] In some cases, the microgrid 10 may be connected to a public grid so that the public grid and the microgrid 10 jointly supply power to the plurality of loads.

[0034] For example, the public grid may be a large grid. For example, the connection point between the microgrid 10 and the public grid may be called a grid connection point, and the load power of the grid connection point is the power supplied by the public grid to the loads in the microgrid 10 .

[0035] In some embodiments, the microgrid 10 may further include a transformer having a rated voltage.

[0036] For example, when the microgrid 10 is connected to the public grid, the power generation system in the microgrid 10 can generate power, and then the power generation system and the public grid can supply power to the multiple loads and the energy storage system through the transformer. Alternatively, the power generation system in the microgrid 10 can generate power, the energy storage system can discharge, and then the power generation system, the energy storage system and the public grid can supply power to the multiple loads through the transformer.

[0037] However, when the load power of the grid connection point of the microgrid 10 is small, the excess electric energy in the microgrid 10 may flow back into the public grid, that is, reverse power phenomenon may occur, which may damage the grid equipment of the public grid and may also affect the stability of the operation of the public grid and the power supply quality.

[0038] To this end, an embodiment of the present application provides a power adjustment method, which is applied to a power adjustment system. The power adjustment system can detect the load power of the grid connection point in real time. When the load power of the grid connection point is small, the operating power of the energy storage system and / or the output power of the power generation system are adjusted to increase the load power of the grid connection point and avoid reverse power phenomenon.

[0039] It should be noted that in the embodiment of the present application, when it is detected that the current load power of the grid connection point is small during the grid connection operation of the microgrid, the operating power of the energy storage system can be adjusted first, and when the operating power of the energy storage system cannot be adjusted, the output power of the power generation system can be adjusted. In this way, the power generation system can be avoided from being affected as much as possible while avoiding the reverse power phenomenon, thereby ensuring the power utilization rate of the power generation system.

[0040] The power adjustment system provided in the embodiment of the present application is described below.

[0041] Figure 2 is a schematic diagram of a power adjustment system provided in an embodiment of the present application. The power adjustment system can be applied to a microgrid, and specifically can be applied to a scenario where a microgrid is connected to the grid. Figure 2 The power adjustment system 20 may include a power generation system 201 , an energy storage system 202 and a control module 203 .

[0042] The power generation system 201 may communicate with the control module 203 via a wired connection or a wireless connection.

[0043] The energy storage system 202 may communicate with the control module 203 via a wired connection or a wireless connection.

[0044] The power generation system 201 is used to receive the control instruction sent by the control module 203, and control its own output power according to the control instruction. Figure 1 The power generation system in.

[0045] The energy storage system 202 is used to receive the control instruction sent by the control module 203, and control its own operating power according to the control instruction. Figure 1 Energy storage system in.

[0046] Optionally, the energy storage system 202 may include one or more energy storage devices.

[0047] The control module 203 is used to obtain the output power of the power generation system 201, the operating power of the energy storage system 202, and the load power of the grid connection point, and adjust the operating power of the energy storage system 202 and / or the output power of the power generation system 201 according to the load power of the grid connection point.

[0048] The power adjustment method provided in the embodiment of the present application is explained in detail below.

[0049] It should be noted that the embodiments of the present application involve the load power of the grid connection point, the operating power of the energy storage system and the output power of the power generation system.

[0050] When the energy storage system is discharging, the operating power of the energy storage system is the discharging power of the energy storage system. When the energy storage system is charging, the operating power of the energy storage system is the charging power of the energy storage system.

[0051] When the energy storage system is charged, the energy storage system is equivalent to the load. In this case, the sum of the load power at the grid connection point and the output power of the power generation system is equal to the sum of the charging power of the energy storage system and the power of all loads in the microgrid. In other words, the load power at the grid connection point can be obtained by subtracting the output power of the power generation system from the sum of the charging power of the energy storage system and the power of all loads in the microgrid.

[0052] When the energy storage system is discharged, the sum of the load power at the grid connection point, the output power of the power generation system and the discharge power of the energy storage system is equal to the sum of the powers of all loads in the microgrid. In other words, the load power at the grid connection point can be obtained by subtracting the output power of the power generation system and the discharge power of the energy storage system from the sum of the powers of all loads in the microgrid.

[0053] Based on this, in the embodiments of the present application, the load power of the grid connection point is adjusted by adjusting the operating power of the energy storage system and / or the output power of the power generation system, so as to avoid the reverse power phenomenon.

[0054] For example, the charging power of the energy storage system is less than 0, the discharging power of the energy storage system is greater than or equal to 0, the output power of the power generation system is greater than or equal to 0, and the load power of the grid connection point can be greater than 0, equal to 0, or less than 0. Generally, when the load power of the grid connection point is less than 0, reverse power phenomenon will occur.

[0055] Figure 3 is a flow chart of a power adjustment method provided in an embodiment of the present application. The method is applied to Figure 2 The power adjustment system in the embodiment can specifically apply the control module in the power adjustment system. Figure 3 , the method comprises the following steps:

[0056] Step 301: When the control module detects that the first power is less than the preset power, the control module obtains first state information, where the first state information is state information of the energy storage system.

[0057] The first power is the current load power of the grid connection point of the microgrid.

[0058] For example, the state information of the energy storage system may include discharging, charging, or standby. For example, the control module may obtain the first state information from a power conversion system (PCS) in the energy storage system.

[0059] The preset power is used to determine whether the current load power of the grid connection point is likely to trigger the reverse power phenomenon. The preset power is greater than 0, the preset power can be preset, and the preset power can be set to be smaller. For example, the preset power can be set by a technician based on experience.

[0060] In the embodiment of the present application, the control module can detect the current load power of the grid connection point in real time to obtain the first power.

[0061] If the first power is greater than or equal to the preset power, it means that the total power supply of the power generation system and / or the energy storage system does not meet the load consumption of the microgrid, there will be no excess power, and the reverse power phenomenon will not be triggered, so the control module does not need to obtain the first state information.

[0062] If the first power is less than the preset power, it means that the total power supply of the power generation system and / or the energy storage system will soon meet the load consumption of the microgrid. The load consumption in the microgrid often fluctuates. When the first power is less than the preset power, the load power of the grid connection point may fluctuate to less than 0 due to the load consumption fluctuation, which may lead to the occurrence of reverse power phenomenon. Therefore, when the first power is less than the preset power, the control module can obtain the first state information to perform subsequent power adjustments according to the first state information to avoid the occurrence of reverse power phenomenon.

[0063] Step 302: When the first state information is discharging or charging, the control module obtains one or more second state information, and the one or more second state information corresponds one to one with one or more energy storage devices in the energy storage system.

[0064] Each second status information in the one or more second status information is status information of a corresponding energy storage device in the energy storage system.

[0065] For example, a second state information may include one or more of the current operating state, chargeable power, discharge power, etc. of the corresponding energy storage device.

[0066] The operating status may be running or standby.

[0067] The first state information can indicate the operating state of the energy storage system. Specifically, if the first state information is discharging or charging, it means that one or more energy storage devices in the energy storage system are operating normally, so the control module can adjust the load power of the grid connection point by controlling the energy storage system, and the one or more second state information can be obtained at this time; if the first state information is standby, it means that each energy storage device in the energy storage system is not operating, so the control module cannot adjust the load power of the grid connection point by controlling the energy storage system, so there is no need to obtain the one or more second state information.

[0068] In this case, if the first state information is discharging or charging, the control module can obtain one or more second state information to control the corresponding one or more energy storage devices according to the one or more second state information to adjust the load power of the grid connection point accordingly.

[0069] Step 303: The control module adjusts the operating power of the energy storage system according to the first state information, the one or more second state information and the preset power to adjust the load power of the grid connection point.

[0070] Since the current load power (i.e., the first power) and the preset power of the grid connection point are known, the control module can determine the amount of load power that needs to be adjusted, and since the first state information and the second state information of each of the one or more energy storage devices are known, the operating power of the energy storage system can be adjusted to adjust the load power of the grid connection point. In this way, the control module can reduce the probability of reverse power phenomenon by dynamically adjusting the load power of the grid connection point when there is a risk of reverse power. Since there is no need to install and maintain an anti-backflow device, costs can be saved. And since the operating power of the energy storage system is adjusted first, the impact on the power generation system can be avoided as much as possible to ensure the power utilization rate of the power generation system.

[0071] In some embodiments, the operation of step 303 may be: the control module obtains the second power; the control module adjusts the operating power of the energy storage system according to the first state information, the one or more second state information, the second power and the preset power.

[0072] The second power is the current operating power of the energy storage system. For example, if the second power is greater than or equal to 0, it means that the energy storage system is currently supplying power to the load, that is, discharging; if the second power is less than 0, it means that the energy storage system is currently charging, that is, charging.

[0073] Since the second power is the current operating power of the energy storage system, after obtaining the second power, the control module can determine the operating power of the energy storage system that can increase the load power of the grid connection point to greater than or equal to the preset power based on the first state information, the one or more second state information, the second power and the preset power, and then make adjustments accordingly.

[0074] In some embodiments, the control module may adjust the operating power of the energy storage system according to the first state information, the one or more second state information, the second power and the preset power by: subtracting the preset power from the first power and adding the resultant to the second power to obtain the first target power; and adjusting the operating power of the energy storage system according to the first state information, the one or more second state information and the first target power.

[0075] The first target power is the power that the energy storage system needs to achieve.

[0076] For example, the control module may determine the first target power according to the first power, the preset power and the second power by the following formula:

[0077]

[0078] P GL is the first target power; P N is the second power; P is the first power; R d In this formula, if the first power is greater than or equal to the preset power, the energy storage system continues to operate at the current operating power; if the first power is less than the preset power, the first power minus the preset power is added to the second power to obtain the first target power, and the operating power of the energy storage system is adjusted according to the first target power.

[0079] It should be noted that when the first state information is discharging, the second power is greater than or equal to 0. Since the first power is less than the preset power, the first target power obtained by subtracting the preset power from the first power and adding it to the second power may be greater than or equal to 0, or may be less than 0. Since the minimum discharge power of the energy storage system is 0 when the first state information is discharging, if the first target power is greater than or equal to 0, then only adjusting the discharge power of the energy storage system can make the load power of the grid-connected point greater than or equal to the preset power; and if the first target power is less than 0, then only adjusting the discharge power of the energy storage system is not enough to make the load power of the grid-connected point greater than or equal to the preset power, in which case the output power of the power generation system also needs to be adjusted.

[0080] When the first state information is charging, the second power is less than 0. Since the first power is less than the preset power, the first power minus the preset power and then added to the second power, the first target power is less than 0. Since the chargeable power of the energy storage system is less than 0 when the first state information is charging, if the first target power is less than 0, then only adjusting the charging power of the energy storage system can make the load power of the grid connection point greater than or equal to the preset power.

[0081] After determining the first target power, the control module can adjust the operating power of the energy storage system and / or the output power of the power generation system according to the first target power. Since the energy storage system includes two operating states (i.e., discharging or charging), the control module can adjust the operating power of the energy storage system according to the first state information, the one or more second state information and the first target power in the following two ways.

[0082] The first method: the control module determines, based on the one or more second state information, that the current operating state of the energy storage system is m energy storage devices in operation, where m is a positive integer; when the first state information is discharging, the control module adjusts the discharge power of the m energy storage devices according to the first target power so that the load power of the grid-connected point is greater than or equal to the preset power.

[0083] The m energy storage devices whose current operating status is in operation refer to the m energy storage devices that are discharging in the energy storage system.

[0084] If the first state information is discharging, it means that the energy storage system is currently supplying power to the load in the microgrid. The greater the discharge power of the energy storage system, the smaller the load power of the grid-connected point will be. Therefore, the control module can reduce the discharge power of the m energy storage devices according to the first target power to increase the load power of the grid-connected point, so that the load power of the grid-connected point can be greater than or equal to the preset power to avoid the occurrence of reverse power phenomenon.

[0085] In some embodiments, the operation of the control module adjusting the discharge power of the m energy storage devices according to the first target power may be: if the first target power is greater than or equal to 0, the control module subtracts the first target power from the second power to obtain a first power adjustment amount; the control module determines a target adjustment amount for each of the m energy storage devices according to the first power adjustment amount and the current discharge power of each of the m energy storage devices; the control module reduces the discharge power of each of the m energy storage devices by the target adjustment amount.

[0086] The first power adjustment amount is the amount by which the total discharge power of the m energy storage devices needs to be reduced.

[0087] The target adjustment amount of an energy storage device is the amount by which the discharge power of the energy storage device needs to be reduced.

[0088] In some embodiments, the control module may determine the target adjustment amount of each of the m energy storage devices according to the first power adjustment amount and the current discharge power of each of the m energy storage devices, including the following steps A to G:

[0089] Step A: The control module distributes the first power adjustment amount to the m energy storage devices according to the number of the m energy storage devices or the remaining power of each of the m energy storage devices to obtain the first adjustment amount of each of the m energy storage devices.

[0090] If the control module distributes the first power adjustment amount to the m energy storage devices according to the number of the m energy storage devices, then the first adjustment amount of each of the m energy storage devices is equal.

[0091] If the control module distributes the first power adjustment amount to the m energy storage devices according to the remaining power of each of the m energy storage devices, then the first adjustment amount of the energy storage device with a larger remaining power among the m energy storage devices is smaller, so that the energy storage device with a larger remaining power is discharged as much as possible, and the first adjustment amount of the energy storage device with a smaller remaining power among the m energy storage devices is larger, so that the energy storage device with a smaller remaining power is discharged as little as possible. In this way, the remaining power of the m energy storage devices can be balanced, over-discharge of the energy storage device with a smaller remaining power can be avoided, and the life of the energy storage device can be guaranteed.

[0092] For example, the control module may determine the first adjustment amount of each of the m energy storage devices according to the number of the m energy storage devices by the following formula:

[0093]

[0094] P G is the first adjustment amount; P GLis the first target power; P N is the second power; m is the number of energy storage devices. In this formula, if the first target power is equal to the second power, it means that there is no need to adjust the discharge power of the energy storage device, so the first adjustment amount of each of the m energy storage devices is 0; if the first target power is less than the second power, it means that the discharge power of the energy storage device needs to be reduced, so the first power adjustment amount obtained by subtracting the first target power from the second power can be divided by m to obtain the first adjustment amount of each of the m energy storage devices.

[0095] Step B: The control module multiplies the first target power by a preset coefficient to obtain a second adjustment amount.

[0096] The preset coefficient may be preset, and the preset coefficient may be greater than or equal to 0 and less than 1. For example, the preset coefficient may be set by a technician based on experience.

[0097] For example, the control module may determine the second adjustment amount by the following formula:

[0098] P L =P GL ×K;

[0099] P L is the second adjustment amount; P GL is the first target power; K is the preset coefficient.

[0100] Since the load power of the grid connection point changes in real time, if the discharge power of each of the m energy storage devices is adjusted according to the first adjustment amount of each energy storage device to adjust the load power of the grid connection point to the preset power, it may happen that the load power of the grid connection point is less than the preset power due to load fluctuations in the microgrid, resulting in the need to repeatedly adjust the load power of the grid connection point, which is inefficient. For this reason, in this case, a second adjustment amount can be determined, and then the second adjustment amount can be additionally reduced on the basis of reducing the charging power of each of the m energy storage devices by the first adjustment amount, in order to adjust the load power of the grid connection point higher. In this way, the probability of repeatedly adjusting the load power of the grid connection point in a short period of time can be reduced, thereby improving the adjustment efficiency.

[0101] Step C: the control module adds the first adjustment amount and the second adjustment amount of each energy storage device in the m energy storage devices to obtain a target adjustment amount for each energy storage device.

[0102] For example, the control module may determine the target adjustment amount of each energy storage device by the following formula:

[0103] P B =P G +P L ;

[0104] P B is the target adjustment amount; P G is the first adjustment amount; P L The second adjustment amount.

[0105] Step D: The control module determines whether there is a first energy storage device among the m energy storage devices.

[0106] The first energy storage device is an energy storage device whose current discharge power is less than the target adjustment amount among the m energy storage devices. The second energy storage device is an energy storage device whose current discharge power is greater than the target adjustment amount among the m energy storage devices.

[0107] If the current discharge power of an energy storage device is less than the target adjustment amount, it means that the current discharge power of the energy storage device cannot reduce the target adjustment amount, and the energy storage device is determined as the first energy storage device; if the current discharge power of an energy storage device is greater than the target adjustment amount, it means that the current discharge power of the energy storage device can reduce the target adjustment amount, and the energy storage device is determined as the second energy storage device.

[0108] Step E: If there is a first energy storage device among the m energy storage devices, then for any first energy storage device, the control module determines the power difference between the target adjustment amount of the first energy storage device and the current discharge power of the first energy storage device, and updates the target adjustment amount of the first energy storage device to the current discharge power of the first energy storage device.

[0109] If there is a first energy storage device among the m energy storage devices, it means that there is at least one energy storage device (i.e., the first energy storage device) among the m energy storage devices, and the current discharge power of which cannot be reduced by the corresponding target adjustment amount. Therefore, the target adjustment amount of the first energy storage device can be subtracted from the current discharge power of the first energy storage device to obtain a power difference, which is the part that cannot be reduced by the first energy storage device. Then, the target adjustment amount of the first energy storage device is updated to the current discharge power of the first energy storage device, so that the discharge power of the first energy storage device can be subsequently reduced to 0.

[0110] If the first energy storage device does not exist in the m energy storage devices, the operation of determining the target adjustment amount of each of the m energy storage devices is terminated.

[0111] Step F: The control module determines the sum of the power differences corresponding to all first energy storage devices in the m energy storage devices as the second power adjustment amount.

[0112] The second power adjustment amount is a power adjustment amount that needs to be reallocated.

[0113] Step G: the control module updates the target adjustment amounts of all the second energy storage devices in the m energy storage devices according to the second power adjustment amount.

[0114] Since the current charging power of the second energy storage device is greater than the target adjustment amount, the current charging power of the second energy storage device can further reduce part or all of the second power adjustment amount after reducing the target adjustment amount, so the control module can distribute the second power adjustment amount to all second energy storage devices among the m energy storage devices.

[0115] In some embodiments, the operation of the control module updating the target adjustment amount of all second energy storage devices in the m energy storage devices according to the second power adjustment amount may be as follows: the control module distributes the second power adjustment amount to all second energy storage devices in the m energy storage devices according to the number of all second energy storage devices in the m energy storage devices or according to the remaining power of each second energy storage device in the m energy storage devices, to obtain the third adjustment amount of each second energy storage device in the m energy storage devices; for any second energy storage device, the control module adds the target adjustment amount of the second energy storage device to the third adjustment amount of the second energy storage device, to obtain the updated target adjustment amount of the second energy storage device.

[0116] In some cases, after the above step G, the control device may re-determine whether there is a first energy storage device and a second energy storage device among the m energy storage devices. If there is a first energy storage device and a second energy storage device among the m energy storage devices, the above steps E to G may be repeated. If there is no first energy storage device among the m energy storage devices, the operation of determining the target adjustment amount may be terminated. If there is a first energy storage device but no second energy storage device among the m energy storage devices, the above step E may be performed, and then the operation of determining the target adjustment amount may be terminated, after which the sum of the power differences corresponding to all the first energy storage devices among the m energy storage devices may be determined as the target power adjustment amount, and the output power of the power generation system may be reduced by the target power adjustment amount.

[0117] In some embodiments, the microgrid further includes a transformer, and the rated power of the transformer is greater than the preset power. Since the control module adds an additional second adjustment amount when determining the target adjustment amount of each of the m energy storage devices, the load power of the grid connection point after adjustment may exceed the rated power of the transformer, i.e., an overload occurs.

[0118] To this end, after determining the target adjustment amount of each of the m energy storage devices, the control module can determine the estimated grid connection point load power; when the estimated grid connection point load power is less than or equal to the rated power of the transformer, the control module reduces the discharge power of each of the m energy storage devices by the target adjustment amount; when the estimated grid connection point load power is greater than the rated power of the transformer, the control module can adjust the target adjustment amount of each of the m energy storage devices according to the estimated grid connection point load power, and then reduce the discharge power of each of the m energy storage devices by the target adjustment amount. In this way, not only the probability of reverse power phenomenon can be reduced, but also the stable operation of the transformer can be guaranteed, so that the safety and stability of the microgrid grid-connected operation can be improved.

[0119] Optionally, the control module may determine the estimated grid-connected point load power by: subtracting the target adjustment amount from the current discharge power of each of the m energy storage devices to obtain the target discharge power of each energy storage device; determining the sum of the target discharge power of each of the m energy storage devices as the second target power; subtracting the second target power from the second power to obtain the fifth power adjustment amount; and adding the first power to the fifth power adjustment amount to obtain the estimated grid-connected point load power.

[0120] Optionally, the control module may adjust the target adjustment amount of each of the m energy storage devices according to the estimated grid-connected point load power by: subtracting the rated power of the transformer or the preset power from the estimated grid-connected point load power to obtain a third target power; dividing the third target power by m to obtain a sixth power adjustment amount; and subtracting the sixth power adjustment amount from the target adjustment amount of each of the m energy storage devices to obtain an updated target adjustment amount of each energy storage device.

[0121] The target discharge power of an energy storage device is the estimated adjusted discharge power of the energy storage device.

[0122] The second target power is the estimated discharge power of the energy storage system after adjustment.

[0123] The fifth power adjustment amount is an estimated power reduction amount of the energy storage system.

[0124] The third target power is the increase in discharge power of the energy storage system determined to enable the load power of the grid-connected point to be greater than or equal to the rated power of the transformer.

[0125] For example, the control module may determine the estimated grid connection point load power by the following formula:

[0126] P e =P-(PGL2 -P N );

[0127] P e is the estimated grid-connected point load power; P is the first power; P GL2 is the second target power; P N is the second power.

[0128] For example, the control module may determine the third target power by the following formula:

[0129] P GL3 =P e -R d ;

[0130] P GL3 is the third target power; P e is the estimated grid-connected point load power; R d The preset power.

[0131] In other embodiments, the operation of the control module adjusting the discharge power of the m energy storage devices according to the first target power may be: if the first target power is less than 0, the control module determines a third power adjustment amount according to the absolute value of the first target power; the control module adjusts the discharge power of each of the m energy storage devices to 0, and reduces the output power of the power generation system in the microgrid by the third power adjustment amount.

[0132] The third power adjustment amount is the determined amount by which the output power of the power generation system needs to be reduced.

[0133] In some cases, the operation of the control module determining the third power adjustment amount based on the absolute value of the first target power may be: the control module determines the absolute value of the first target power as the third power adjustment amount, or multiplies the absolute value of the first target power by a preset coefficient and then adds the result to the absolute value of the first target power to obtain the third power adjustment amount.

[0134] Optionally, the microgrid further includes a transformer, the rated power of which is greater than the preset power. Since the control module adds a preset coefficient when determining the third power adjustment amount, the load power of the grid connection point after adjustment may exceed the rated power of the transformer, i.e., an overload occurs.

[0135] To this end, after the control module determines the third power adjustment amount according to the absolute value of the first target power, it can also determine the estimated grid-connected point load power; when the estimated grid-connected point load power is less than or equal to the rated power of the transformer, the control module can reduce the output power of the power generation system by the third power adjustment amount; when the estimated grid-connected point load power is greater than the rated power of the transformer, the control module can adjust the third power adjustment amount according to the estimated grid-connected point load power, and then reduce the output power of the power generation system by the third power adjustment amount. In this way, not only the probability of reverse power phenomenon can be reduced, but also the stable operation of the transformer can be guaranteed, thereby improving the safety and stability of the microgrid grid-connected operation.

[0136] Optionally, the control module determines the estimated grid connection point load power by: determining the sum of the second power and the third power adjustment amount as the seventh power adjustment amount; adding the first power to the seventh power adjustment amount to obtain the estimated grid connection point load power.

[0137] Optionally, the control module may adjust the third power adjustment amount according to the estimated grid-connected point load power by: subtracting the rated power of the transformer or the preset power from the estimated grid-connected point load power to obtain a fourth target power; and subtracting the fourth target power from the third power adjustment amount to obtain an updated third power adjustment amount.

[0138] The seventh power adjustment amount is the determined total power amount that needs to be reduced for the energy storage system and the power generation system.

[0139] The fourth target power is the power increase of the power generation system determined so as to make the load power of the grid-connected point greater than or equal to the rated power of the transformer.

[0140] The second method: the control module determines, based on the one or more second state information, that the current operating state of the energy storage system is m energy storage devices in operation, where m is a positive integer; when the first state information is charging, the control module adjusts the charging power of the m energy storage devices according to the first target power so that the load power of the grid connection point is greater than or equal to the preset power.

[0141] The m energy storage devices whose current operating status is in operation refer to the m energy storage devices being charged in the energy storage system.

[0142] If the first status information is charging, it means that the energy storage system is currently consuming the power output by the power generation system, and the greater the charging power of the energy storage system, the greater the load power of the grid connection point, so the control module can increase the charging power of the m energy storage devices according to the first target power to increase the load power of the grid connection point, so that the load power of the grid connection point can be greater than or equal to the preset power to avoid the occurrence of reverse power phenomenon.

[0143] In some embodiments, the operation of the control module adjusting the charging power of the m energy storage devices according to the first target power may be: the control module determines the target charging power of each of the m energy storage devices according to the first target power and the current rechargeable power of each of the m energy storage devices; the control module adjusts the charging power of each of the m energy storage devices to the target charging power.

[0144] The target charging power of an energy storage device is the charging power that the energy storage device needs to achieve.

[0145] In some embodiments, the control module may determine the target charging power of each of the m energy storage devices according to the first target power and the current chargeable power of each of the m energy storage devices, including the following steps a to g:

[0146] Step a: The control module allocates the first target power to the m energy storage devices according to the number of the m energy storage devices or the remaining power of each of the m energy storage devices to obtain a first charging power for each of the m energy storage devices.

[0147] If the control module distributes the first target power to the m energy storage devices according to the number of the m energy storage devices, then the first charging power of each of the m energy storage devices is equal.

[0148] If the control module allocates the first target power to the m energy storage devices according to the remaining power of each of the m energy storage devices, then the absolute value of the first charging power of the energy storage device with a smaller remaining power among the m energy storage devices is larger, so that the energy storage device with a smaller remaining power can be charged as much as possible, and the absolute value of the first charging power of the energy storage device with a larger remaining power among the m energy storage devices is smaller, so that the energy storage device with a larger remaining power can be charged as little as possible. In this way, the remaining power of the m energy storage devices can be balanced, overcharging of the energy storage device with a larger remaining power can be avoided, and the life of the energy storage devices can be guaranteed.

[0149] Step b: The control module multiplies the first target power by a preset coefficient to obtain a second charging power.

[0150] Since the load power of the grid connection point changes in real time, if the charging power of the energy storage device is adjusted according to the first charging power of each of the m energy storage devices to adjust the load power of the grid connection point to the preset power, the load power of the grid connection point may be less than the preset power due to load fluctuations in the microgrid, resulting in the need to repeatedly adjust the load power of the grid connection point, which is inefficient. For this reason, in this case, a second charging power can be determined, and then the second charging power can be additionally increased on the basis of adjusting the charging power of each of the m energy storage devices to the first charging power, in order to adjust the load power of the grid connection point higher. In this way, the probability of repeatedly adjusting the load power of the grid connection point in a short period of time can be reduced, thereby improving the adjustment efficiency.

[0151] Step c: the control module adds the first charging power and the second charging power of each energy storage device in the m energy storage devices to obtain a target charging power for each energy storage device.

[0152] Step d: the control module determines whether there is a third energy storage device among the m energy storage devices.

[0153] The third energy storage device is an energy storage device whose current rechargeable power is greater than the target charging power among the m energy storage devices, that is, the absolute value of the rechargeable power of the third energy storage device is less than the absolute value of the target charging power. The fourth energy storage device is an energy storage device whose current rechargeable power is less than the target charging power among the m energy storage devices.

[0154] If the current chargeable power of an energy storage device is greater than the target chargeable power of the energy storage device, it means that the chargeable power of the energy storage device cannot reach the target chargeable power, that is, the energy storage device cannot digest the allocated target chargeable power, and thus the energy storage device is determined as the third energy storage device. If the current chargeable power of an energy storage device is less than the target chargeable power, it means that the chargeable power of the energy storage device can reach the target chargeable power, and thus the energy storage device is determined as the fourth energy storage device.

[0155] Step e: If there is a third energy storage device among the m energy storage devices, then for any third energy storage device, the control module determines the power difference between the target charging power of the third energy storage device and the current rechargeable power of the third energy storage device, and updates the target charging power of the third energy storage device to the current rechargeable power of the third energy storage device.

[0156] If there is a third energy storage device among the m energy storage devices, it means that there is at least one energy storage device (i.e., the third energy storage device) among the m energy storage devices that cannot reach the target charging power, so the target charging power of the third energy storage device can be subtracted from the current rechargeable power of the third energy storage device to obtain the power difference, which is the part that the third energy storage device cannot reach, and then the target charging power of the third energy storage device is updated to the current rechargeable power of the third energy storage device.

[0157] If the third energy storage device does not exist in the m energy storage devices, the operation of determining the target charging power of each of the m energy storage devices is terminated.

[0158] Step f: the control module determines the sum of the power differences corresponding to all third energy storage devices in the m energy storage devices as the fourth power adjustment amount.

[0159] The fourth power adjustment amount is the charging power that needs to be reallocated.

[0160] Step g: the control module updates the target charging power of all fourth energy storage devices in the m energy storage devices according to the fourth power adjustment amount.

[0161] Since the current rechargeable power of the fourth energy storage device is less than the target charging power, the charging power of the fourth energy storage device can still bear additional charging power after reaching the target charging power, so the control module can distribute the fourth power adjustment amount to all fourth energy storage devices in the m energy storage devices.

[0162] In some embodiments, the operation of the control module updating the target charging power of all fourth energy storage devices among the m energy storage devices according to the fourth power adjustment amount may be: the control module distributes the fourth power adjustment amount to all fourth energy storage devices among the m energy storage devices according to the number of all fourth energy storage devices among the m energy storage devices or according to the remaining power of each fourth energy storage device among the m energy storage devices, and obtains the fourth adjustment amount for each fourth energy storage device among the m energy storage devices; for any fourth energy storage device, the control module adds the target charging power of the fourth energy storage device to the fourth adjustment amount of the fourth energy storage device, and obtains the updated target charging power of the fourth energy storage device.

[0163] In some cases, after the above step g, the control device may re-determine whether there are third energy storage devices and fourth energy storage devices among the m energy storage devices. If there are third energy storage devices and fourth energy storage devices among the m energy storage devices, the above steps e to g may be repeated. If there is no third energy storage device among the m energy storage devices, the operation of determining the target charging power may be terminated. If there is a third energy storage device but no fourth energy storage device among the m energy storage devices, the above step e may be performed, and then the operation of determining the target charging power may be terminated, after which the absolute value of the sum of the power differences corresponding to all third energy storage devices among the m energy storage devices may be determined as the target power adjustment amount, and the output power of the power generation system may be reduced by the target power adjustment amount.

[0164] In some embodiments, the microgrid further includes a transformer, and the rated power of the transformer is greater than the preset power. Since the control module adds the second charging power when determining the target charging power of each of the m energy storage devices, the load power of the adjusted grid connection point may exceed the rated power of the transformer, i.e., an overload occurs.

[0165] To this end, after determining the target charging power of each of the m energy storage devices, the control module can determine the estimated grid connection point load power; when the estimated grid connection point load power is less than or equal to the rated power of the transformer, the control module adjusts the charging power of each of the m energy storage devices to the target charging power; when the estimated grid connection point load power is greater than the rated power of the transformer, the control module can adjust the target charging power of each of the m energy storage devices according to the estimated grid connection point load power, and then adjust the charging power of each of the m energy storage devices to the target charging power. In this way, not only the probability of reverse power phenomenon can be reduced, but also the stable operation of the transformer can be guaranteed, so that the safety and stability of the microgrid grid-connected operation can be improved.

[0166] Specifically, after determining the target charging power of each of the m energy storage devices, the control module may determine the sum of the target charging power of each of the m energy storage devices as the fifth target power; subtract the fifth target power from the second power to obtain an eighth power adjustment amount; add the first power and the eighth power adjustment amount to obtain an estimated grid-connected point load power; when the estimated grid-connected point load power is greater than the rated power of the transformer, subtract the rated power of the transformer or the preset power from the estimated grid-connected point load power to obtain a sixth target power; divide the sixth target power by m to obtain a ninth power adjustment amount; add the target charging power of each of the m energy storage devices to the ninth power adjustment amount to obtain an updated target charging power of each of the energy storage devices.

[0167] The fifth target power is the estimated charging power of the energy storage system after adjustment.

[0168] The eighth power adjustment amount is the estimated increased charging power of the energy storage device.

[0169] The sixth target power is the determined reduction in charging power of the energy storage system that can make the load power of the grid-connected point greater than or equal to the rated power of the transformer.

[0170] In some embodiments, after the control module obtains the first state information in step 301, when the first state information is in standby mode, the seventh target power is determined based on the preset power and the first power; the output power of the power generation system of the microgrid is reduced by the seventh target power so that the load power of the grid-connected point is greater than or equal to the preset power.

[0171] The seventh target power is the output power that the power generation system in the microgrid needs to reduce.

[0172] If the first state information is in standby mode, it means that the energy storage device in the energy storage system cannot output power due to shutdown, failure or other reasons, so the control module can determine the seventh target power according to the preset power and the first power, and then reduce the output power of the power generation system of the microgrid by the seventh target power, so that the load power of the grid connection point is greater than or equal to the preset power. In this way, the probability of reverse power phenomenon can be reduced to ensure the normal operation of the microgrid.

[0173] In some cases, the control module may determine the seventh target power according to the preset power and the first power by: the control module subtracts the first power from the preset power to obtain the seventh target power.

[0174] In this case, after the control module reduces the output power of the power generation system of the microgrid by the seventh target power, the load power of the grid connection point will be closer to or equal to the preset power.

[0175] In other cases, the control module determines the seventh target power based on the preset power and the first power by: the control module subtracts the first power from the preset power to obtain the third power; multiplies the third power by a preset coefficient and adds the result to the third power to obtain the seventh target power.

[0176] In this case, after the control module reduces the output power of the microgrid's power generation system to the seventh target power, the load power of the grid-connected point will be greater than the preset power. In this way, the probability of repeatedly adjusting the load power of the grid-connected point in a short period of time can be reduced, thereby improving the adjustment efficiency.

[0177] In some embodiments, the microgrid further includes a transformer, and the rated power of the transformer is greater than the preset power. Since the control module adds a preset coefficient when determining the seventh target power, the load power of the grid connection point after adjustment may exceed the rated power of the transformer, i.e., an overload occurs.

[0178] To this end, after determining the seventh target power, the control module can determine the estimated grid-connected point load power; when the estimated grid-connected point load power is less than or equal to the rated power of the transformer, the control module reduces the output power of the microgrid's power generation system by the seventh target power; when the estimated grid-connected point load power is greater than the rated power of the transformer, the control module can adjust the seventh target power according to the estimated grid-connected point load power, and then reduce the output power of the microgrid's power generation system by the seventh target power. In this way, not only can the probability of reverse power phenomenon be reduced, but also the stable operation of the transformer can be guaranteed, thereby improving the safety and stability of the microgrid's grid-connected operation.

[0179] Specifically, after determining the seventh target power, the control module can add the first power to the seventh target power to obtain an estimated grid-connected point load power; when the estimated grid-connected point load power is greater than the rated power of the transformer, the estimated grid-connected point load power is subtracted from the rated power of the transformer or the preset power to obtain the eighth target power; the seventh target power is subtracted from the eighth target power to obtain an updated seventh target power.

[0180] The eighth target power is the output power increase of the power generation system determined so as to make the load power of the grid-connected point greater than or equal to the rated power of the transformer.

[0181] For ease of understanding, the following Figure 4 The above power adjustment method is exemplified.

[0182] Figure 4is a flow chart of a power adjustment method provided by an embodiment of the present application. Figure 4 The method may include the following steps 401 to 409.

[0183] Step 401: The control module determines whether the first power is less than the preset power.

[0184] The first power is the current load power of the microgrid's grid connection point.

[0185] If the first power is less than the preset power, step 402 is executed; if the first power is greater than or equal to the preset power, step 408 is executed.

[0186] Step 402: The control module obtains first status information.

[0187] Step 403: The control module determines whether the first state information is discharging or charging.

[0188] If the first state information is discharging or charging, step 404 is executed; if the first state information is not discharging or charging (ie, in standby mode), step 406 is executed.

[0189] Step 404: The control module obtains one or more second status information.

[0190] Step 405: The control module adjusts the load power of the grid connection point according to the first state information, the one or more second state information and the preset power.

[0191] Step 406: The control module determines a seventh target power according to the preset power and the first power.

[0192] Step 407: The control module reduces the output power of the power generation system by a seventh target power so that the load power of the grid-connected point is greater than or equal to a preset power.

[0193] Step 408: The control module obtains the second power.

[0194] Step 409: The control module maintains normal charging and discharging of the energy storage system.

[0195] In an embodiment of the present application, when the control module detects that the first power is less than the preset power, the first state information is obtained, the first power is the current load power of the grid connection point of the microgrid, and the first state information is the state information of the energy storage system in the microgrid. Afterwards, when the first state information is discharging or charging, one or more second state information is obtained, and the one or more second state information corresponds to one or more energy storage devices in the energy storage system. Finally, the operating power of the energy storage system is adjusted according to the first state information, the one or more second state information and the preset power to adjust the load power of the grid connection point. In this way, the control module can reduce the probability of reverse power phenomenon by dynamically adjusting the load power of the grid connection point when there is a risk of reverse power. Since there is no need to install and maintain an anti-backflow device, costs can be saved. In addition, since the operating power of the energy storage system is adjusted first, the impact on the power generation system can be avoided as much as possible to ensure the power utilization rate of the power generation system.

[0196] Figure 5 Schematic diagram of a power adjustment device provided in an embodiment of the present application. The device can be implemented as part or all of a computer device by software, hardware or a combination of both. The computer device can be as follows Figure 6 Computer equipment shown. Figure 5 The device includes: a first acquisition module 501, a second acquisition module 502, and an adjustment module 502.

[0197] A first acquisition module 501 is used to acquire first status information when it is detected that the first power is less than a preset power, the first power being the current load power of the microgrid grid connection point, and the first status information being status information of the energy storage system in the microgrid;

[0198] A second acquisition module 502, configured to acquire one or more second state information when the first state information is discharging or charging, wherein the one or more second state information corresponds to one or more energy storage devices in the energy storage system;

[0199] The adjustment module 503 is used to adjust the operating power of the energy storage system according to the first state information, the one or more second state information and the preset power, so as to adjust the load power of the grid connection point.

[0200] In an embodiment of the present application, when the device detects that the first power is less than the preset power, the first state information is obtained, the first power is the current load power of the grid connection point of the microgrid, and the first state information is the state information of the energy storage system in the microgrid. Afterwards, when the first state information is discharging or charging, one or more second state information is obtained, and the one or more second state information corresponds to one or more energy storage devices in the energy storage system. Finally, the operating power of the energy storage system is adjusted according to the first state information, the one or more second state information and the preset power to adjust the load power of the grid connection point. In this way, the device can reduce the probability of reverse power phenomenon by dynamically adjusting the load power of the grid connection point when there is a risk of reverse power. Since there is no need to install and maintain an anti-backflow device, costs can be saved. In addition, since the operating power of the energy storage system is adjusted first, the impact on the power generation system can be avoided as much as possible to ensure the power utilization rate of the power generation system.

[0201] It should be noted that: the power adjustment device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example when adjusting power. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0202] The functional modules in the above embodiments may be integrated into one processing unit, or each functional module may exist physically as a processing unit alone, or two or more functional modules may be integrated into one processing unit, and the above processing unit may be implemented in the form of hardware or software. In addition, the specific names of the functional modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present application.

[0203] The power adjustment device and the power adjustment method provided in the above embodiments belong to the same concept. The specific working process of the functional modules in the above embodiments and the technical effects brought about can be found in the method embodiment part and will not be repeated here.

[0204] Figure 6 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present application. Figure 6 As shown, the computer device 6 includes: a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. When the processor 60 executes the computer program 62, the steps in the power adjustment method in the above embodiment are implemented.

[0205] The computer device 6 may be a general-purpose computer device or a dedicated computer device. In a specific implementation, the computer device 6 may be a desktop computer, a portable computer, a network server, a PDA, a mobile phone, a tablet computer, a wireless terminal device, a communication device or an embedded device. The embodiment of the present application does not limit the type of the computer device 6. Those skilled in the art will understand that Figure 6 It is only an example of the computer device 6 and does not constitute a limitation on the computer device 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, etc.

[0206] The processor 60 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0207] In some embodiments, the memory 61 may be an internal storage unit of the computer device 6, such as a hard disk or memory of the computer device 6. In other embodiments, the memory 61 may also be an external storage device of the computer device 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device 6. Further, the memory 61 may also include both an internal storage unit and an external storage device of the computer device 6. The memory 61 is used to store an operating system, an application program, a boot loader, data, and other programs. The memory 61 may also be used to temporarily store data that has been output or is to be output.

[0208] An embodiment of the present application also provides a computer device, which includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, and when the processor executes the computer program, the steps in any of the above-mentioned method embodiments are implemented.

[0209] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0210] An embodiment of the present application provides a computer program product, which, when executed on a computer, enables the computer to execute the steps in the above-mentioned method embodiments.

[0211] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above method embodiments, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, which can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the camera / terminal device, recording medium, computer memory, ROM (read-only memory), RAM (random access memory), CD-ROM (compact disc read-only memory), magnetic tape, floppy disk and optical data storage device. The computer-readable storage medium mentioned in the present application can be a non-volatile storage medium, in other words, it can be a non-transient storage medium.

[0212] It should be understood that all or part of the steps to implement the above embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions can be stored in the above-mentioned computer readable storage medium.

[0213] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0214] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0215] In the embodiments provided in the present application, it should be understood that the disclosed devices / computer equipment and methods can be implemented in other ways. For example, the device / computer equipment embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0216] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0217] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with the relevant regulations and standards of relevant countries and regions, and corresponding operation entrances are provided for users to choose to authorize or refuse.

[0218] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A power adjustment method, characterized in that: Applied to a microgrid, the method comprises: When it is detected that the first power is less than the preset power, first state information is obtained, where the first power is the current load power of the grid connection point of the microgrid, and the first state information is the state information of the energy storage system in the microgrid; When the first state information is discharging or charging, obtaining one or more second state information, wherein the one or more second state information corresponds one to one with one or more energy storage devices in the energy storage system; The operating power of the energy storage system is adjusted according to the first state information, the one or more second state information and the preset power to adjust the load power of the grid connection point.

2. The method according to claim 1, characterized in that The adjusting the operating power of the energy storage system according to the first state information, the one or more second state information and the preset power includes: Acquire a second power, where the second power is the current operating power of the energy storage system; The operating power of the energy storage system is adjusted according to the first state information, the one or more second state information, the second power and the preset power.

3. The method according to claim 2, characterized in that The adjusting the operating power of the energy storage system according to the first state information, the one or more second state information, the second power and the preset power includes: Subtract the preset power from the first power and add the resultant power to the second power to obtain a first target power; The operating power of the energy storage system is adjusted according to the first state information, the one or more second state information and the first target power.

4. The method according to claim 3, characterized in that The second state information includes one or more of the current operating state, chargeable power, and discharge power of the corresponding energy storage device, and the operating state is running or standby; The adjusting the operating power of the energy storage system according to the first state information, the one or more second state information and the first target power includes: Determine, according to the one or more second state information, that the current operating state of the energy storage system is m energy storage devices in operation, where m is a positive integer; When the first state information is discharging, adjusting the discharge power of the m energy storage devices according to the first target power; When the first state information is charging, the charging powers of the m energy storage devices are adjusted according to the first target power.

5. The method according to claim 4, characterized in that The step of adjusting the discharge power of the m energy storage devices according to the first target power includes: when the first target power is greater than or equal to 0, subtracting the first target power from the second power to obtain a first power adjustment amount; determining a target adjustment amount for each of the m energy storage devices according to the first power adjustment amount and the current discharge power of each of the m energy storage devices; and reducing the discharge power of each of the m energy storage devices by the target adjustment amount; And / or, adjusting the discharge power of the m energy storage devices according to the first target power includes: when the first target power is less than 0, determining a third power adjustment amount according to the absolute value of the first target power; adjusting the discharge power of each of the m energy storage devices to 0, and reducing the output power of the power generation system in the microgrid by the third power adjustment amount; And / or, adjusting the charging power of the m energy storage devices according to the first target power includes: determining the target charging power of each of the m energy storage devices according to the first target power and the current rechargeable power of each of the m energy storage devices; and adjusting the charging power of each of the m energy storage devices to the target charging power.

6. The method according to claim 5, characterized in that The microgrid also includes a transformer; Before reducing the discharge power of each of the m energy storage devices by the target adjustment amount, it also includes: subtracting the target adjustment amount from the current discharge power of each of the m energy storage devices to obtain the target discharge power of each of the m energy storage devices; determining the sum of the target discharge power of each of the m energy storage devices as the second target power; subtracting the second target power from the second power to obtain the fifth power adjustment; adding the first power to the fifth power adjustment to obtain the estimated grid connection point load power; when the estimated grid connection point load power is greater than the rated power of the transformer, subtracting the rated power of the transformer or the preset power from the estimated grid connection point load power to obtain the third target power; dividing the third target power by m to obtain the sixth power adjustment; subtracting the sixth power adjustment from the target adjustment amount of each of the m energy storage devices to obtain the updated target adjustment amount of each of the energy storage devices; And / or, before reducing the output power of the power generation system in the microgrid by the third power adjustment amount, it also includes: determining the sum of the second power and the third power adjustment amount as the seventh power adjustment amount; adding the first power to the seventh power adjustment amount to obtain an estimated grid-connected point load power; when the estimated grid-connected point load power is greater than the rated power of the transformer, subtracting the rated power of the transformer or the preset power from the estimated grid-connected point load power to obtain a fourth target power; subtracting the fourth target power from the third power adjustment amount to obtain an updated third power adjustment amount; And / or, before adjusting the charging power of each of the m energy storage devices to the target charging power, it also includes: determining the sum of the target charging power of each of the m energy storage devices as the fifth target power; subtracting the fifth target power from the second power to obtain an eighth power adjustment amount; adding the first power to the eighth power adjustment amount to obtain an estimated grid connection point load power; when the estimated grid connection point load power is greater than the rated power of the transformer, subtracting the rated power of the transformer or the preset power from the estimated grid connection point load power to obtain a sixth target power; dividing the sixth target power by m to obtain a ninth power adjustment amount; adding the target charging power of each of the m energy storage devices to the ninth power adjustment amount to obtain an updated target charging power of each of the energy storage devices.

7. The method according to any one of claims 1 to 6, characterized in that: After obtaining the first state information, the method further includes: When the first state information is in standby mode, determining a seventh target power according to the preset power and the first power; The output power of the power generation system of the microgrid is reduced by the seventh target power so that the load power of the grid connection point is greater than or equal to the preset power.

8. A computer device, characterized in that: The computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the method according to any one of claims 1 to 7 when executed by the processor.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

10. A computer program product, characterized in that When the computer program product is executed on a computer device, the computer device is caused to execute the method according to any one of claims 1 to 7.

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