Power coordination control method, apparatus, system, device and program

Abstract

The embodiment of the invention discloses a power coordination control method, device, system, equipment and program. The method comprises the following steps: acquiring current running state information of an off-grid source network load storage system; outputting the frequency variation and the frequency change rate of the off-grid source network load storage system according to the current frequency information; determining the power demand quantity of the off-grid source network load storage system according to the frequency variation quantity; obtaining a target control resource according to the frequency change rate and the response speed of the controllable resource; determining the target working power of the target control resource according to the power demand and the adjustable capability of the target control resource; and sending the target working power to the target control resource to execute power control so as to adjust the frequency of the off-grid source network load storage system to the target frequency. According to the technical scheme provided by the embodiment of the invention, the stable power regulation of the off-grid source network load storage system can be realized, the power shortage can be quickly complemented, and the power regulation efficiency and safety of the off-grid source network load storage system are improved.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a power coordination control method, apparatus, system, device, and program. Background Technology

[0002] With the accelerated pace of the global energy transition, adjustable loads, such as the hydrogen energy industry, are receiving increasing attention as an important component of the future energy system.

[0003] However, without the support of the power grid, the power supply system of existing new energy power generation has large power fluctuations, which will lead to large fluctuations in the power supplied to the load. The load equipment is unable to withstand the power fluctuations, resulting in a decrease in its service life and safety hazards.

[0004] The poor power stability of existing off-grid power generation, grid-load, and energy storage systems has become a pressing technical problem that needs to be solved in the industry. Summary of the Invention

[0005] This application provides a power coordination control method, apparatus, system, device, and program to address the problem of poor power stability in off-grid source-grid-load-storage systems.

[0006] To address the aforementioned technical problems, this application adopts the following technical solution:

[0007] This application provides a power coordination control method for controlling an off-grid source-grid-load-storage system. The method includes:

[0008] Obtain the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information of the off-grid source-grid-load-storage system, the response speed of controllable resources, and the current adjustability of controllable resources. The current adjustability of controllable resources includes the current output power of new energy power generation equipment, the current input power of load, and the current output power or current input power of energy storage equipment.

[0009] Based on the current frequency information, output the frequency change and frequency change rate of the off-grid source-grid-load-storage system.

[0010] Based on the frequency change, determine the power demand of the off-grid source-grid-load-storage system; the power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency.

[0011] The target control resource is obtained based on the rate of change of frequency and the response speed of the controllable resource; the target control resource is the controllable resource with a response speed that is closest to the rate of change of frequency.

[0012] The target operating power of the target control resources is determined based on the power demand and the current adjustability of the target control resources.

[0013] Send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

[0014] Optionally, based on the frequency variation, determine the power demand of the off-grid source-grid-load-storage system, including:

[0015] The power requirement is determined by comparing the frequency change with the preset frequency change threshold.

[0016] Optionally, new energy power generation equipment includes photovoltaic power generation equipment and wind power generation equipment; load includes adjustable load;

[0017] Based on the rate of change of frequency and the response speed of controllable resources, the target controllable resources are obtained, including:

[0018] When the rate of change of frequency is greater than the response speed of photovoltaic power generation equipment, the target control resource is determined to be an energy storage device.

[0019] When the rate of change of frequency is greater than the response speed of the adjustable load, the target control resource is determined to be the photovoltaic power generation equipment.

[0020] When the rate of change of frequency is greater than the response speed of the wind power generation equipment, the target control resource is determined as an adjustable load.

[0021] Optionally, obtaining the target control resource based on the frequency change rate and the response speed of the controllable resource includes:

[0022] When the rate of change of frequency is less than the response speed of the wind power generation equipment, the target control resource is determined to be the wind power generation equipment.

[0023] Optionally, the target operating power of the target control resource is determined based on its adjustability and power requirements, including:

[0024] The adjustability and power requirements of the i-th level target control resource are compared; the target control resource includes the i-th level target control resource; up to the (i+m)-th level target control resource; the response speed of the i-th level target control resource decreases sequentially to the (i+m)-th level target control resource; i and m are both positive integers greater than or equal to 1 and less than or equal to 3; i+m is a positive integer greater than or equal to 1 and less than or equal to 4.

[0025] When the adjustability of the i-th level target control resource is greater than or equal to the power demand, the target operating power of the i-th level target control resource is determined as the sum of the current output power or input power of the i-th level target control resource and the power demand.

[0026] When the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined as the full operating power, and the operating priority of the (i+1)-th level target control resource is allocated to the (i+m)-th level target control resource according to the response speed of the controllable resources.

[0027] Optionally, when the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the operating priority of the (i+1)-th level target control resource to the (i+m)-th level target control resource is allocated according to the response speed of the controllable resource, including:

[0028] New energy power generation equipment includes photovoltaic power generation equipment and wind power generation equipment; load includes adjustable load; the response speed of controllable resources, from fastest to slowest, is as follows: the response speed of energy storage equipment is faster than that of photovoltaic power generation equipment, the response speed of photovoltaic power generation equipment is faster than that of adjustable load, and the response speed of adjustable load is faster than that of wind power generation equipment.

[0029] The target control resources from level i to level i+m are all one of energy storage equipment, photovoltaic power generation equipment, adjustable load or wind power generation equipment.

[0030] When the sum of the adjustable capabilities of the target control resources from level i to level i+m-1 is less than the power demand, the target control resources of level i+m are determined according to the order of the response speed of the controllable resources from fastest to slowest.

[0031] The target operating power of the target control resource at level i+m is determined based on the difference between the sum of the adjustable capabilities of the target control resources at levels i+m-1 to the power requirement, and the adjustable capability of the target control resource at level i+m.

[0032] Optionally, before obtaining the current operating status information of the off-grid source-grid-load-storage system, the following steps are also included:

[0033] According to the preset fault handling relationship table, the power of the off-grid source-grid-load-storage system is adjusted; the fault handling relationship table includes the working power adjustment methods of controllable resources to eliminate different types of faults in the off-grid source-grid-load-storage system.

[0034] According to a second aspect of this application, this embodiment provides a power coordination control device for controlling an off-grid source-grid-load-storage system. The power coordination control device includes:

[0035] The acquisition module is used to acquire the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information of the off-grid source-grid-load-storage system, the response speed of controllable resources, and the current adjustability of controllable resources. The current adjustability of controllable resources includes the current output power of new energy power generation equipment, the current input power of load, and the current output power or current input power of energy storage equipment.

[0036] The frequency determination module is used to output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system based on the current frequency information.

[0037] The power demand determination module is used to determine the power demand of the off-grid source-grid-load-storage system based on the frequency change. The power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency.

[0038] The matching module is used to obtain the target control resource based on the frequency change rate and the response speed of the controllable resource; the target control resource is the controllable resource with a response speed that is closest to the frequency change rate.

[0039] The target power determination module is used to determine the target operating power of the target control resource based on the power demand and the current adjustability of the target control resource.

[0040] The execution control module is used to send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

[0041] Optionally, the power demand determination module is further configured to determine the power demand based on a comparison between the frequency change and a preset frequency change threshold.

[0042] Optionally, the new energy power generation equipment includes photovoltaic power generation equipment and wind power generation equipment; the load includes adjustable load; the matching module is further configured to determine the target control resource as the energy storage device when the frequency change rate is greater than the response speed of the photovoltaic power generation equipment; determine the target control resource as the photovoltaic power generation equipment when the frequency change rate is greater than the response speed of the adjustable load; and determine the target control resource as the adjustable load when the frequency change rate is greater than the response speed of the wind power generation equipment.

[0043] Optionally, the matching module is further configured to identify the target control resource as the wind power generation equipment when the frequency change rate is less than the response speed of the wind power generation equipment.

[0044] Optionally, a target power determination module is used to compare the adjustability of the i-th level target control resource with the power demand; the target control resources include target control resources from level i to level (i+m); the response speed of the target control resources from level i to level (i+m) decreases sequentially; i and m are both positive integers greater than or equal to 1 and less than or equal to 3; i+m is a positive integer greater than or equal to 1 and less than or equal to 4; when the adjustability of the i-th level target control resource is greater than or equal to the power demand, the target operating power of the i-th level target control resource is determined to be the sum of the current output power or input power of the i-th level target control resource and the power demand; when the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the operating priority of the target control resources from level (i+1) to level (i+m) is allocated according to the response speed of the controllable resources.

[0045] Optionally, the target control resources from level i to level i+m are all one of the energy storage device, the photovoltaic power generation device, the adjustable load, or the wind power generation device; the target power determination module is further configured to determine the level i+m target control resource according to the order of the response speed of the controllable resources from fast to slow when the sum of the adjustable capabilities of the level i to level i+m-1 target control resources is less than the power demand; and to determine the target operating power of the level i+m target control resource based on the difference between the sum of the adjustable capabilities of the level i to level i+m-1 target control resources and the power demand, as well as the adjustable capability of the level i+m target control resource.

[0046] Optionally, the power coordination control device further includes: a first adjustment module, used to adjust the power of the off-grid source-grid-load-storage system according to a preset fault handling relationship table before obtaining the current operating status information of the off-grid source-grid-load-storage system; the fault handling relationship table includes controllable resource power adjustment methods adopted to eliminate different fault types occurring in the off-grid source-grid-load-storage system.

[0047] According to a third aspect of this application, this embodiment provides an off-grid power generation, load and energy storage system, including an energy storage device and a controller. The controller is connected to the new energy power generation device, the load and the energy storage device, and is used to execute the power coordination control method proposed in any item of the first aspect.

[0048] According to a fourth aspect of this application, this embodiment provides an electronic device, including:

[0049] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to execute the power coordination control method proposed in any of the first aspects.

[0050] According to a fifth aspect of this application, this embodiment provides a computer-readable storage medium storing computer instructions for causing a processor to execute and implement the power coordination control method proposed in any item of the first aspect.

[0051] According to a sixth aspect of this application, this embodiment provides a computer program product, including a computer program that, when executed by a processor, implements the power coordination control method proposed according to any one of the first aspects.

[0052] The power coordination control method provided in this application obtains the current operating status information of the off-grid source-grid-load-storage system, considers the power regulation characteristics and regulation constraints of the off-grid source-grid-load-storage system, combines the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system with the response requirements of actual power and controllable resources, obtains the target control resource based on the frequency change rate and the response speed of the controllable resource, determines the target operating power of the target control resource according to the power demand related to the frequency change amount and the current adjustability of the target control resource, and finally performs power control based on the target operating power of the target control resource. This method can not only achieve stable power regulation of the off-grid source-grid-load-storage system, but also improve the security of power regulation of the off-grid source-grid-load-storage system. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0054] Figure 1 This is a flowchart of a power coordination control method provided in an embodiment of this application;

[0055] Figure 2 This is a flowchart of another power coordination control method provided in the embodiments of this application;

[0056] Figure 3This is a flowchart of a method for determining a preset fault handling relationship table in a power coordination control method provided in this application embodiment;

[0057] Figure 4 This is a flowchart of another power coordination control method provided in the embodiments of this application;

[0058] Figure 5 This is a schematic diagram of a power coordination control device provided in an embodiment of this application. Detailed Implementation

[0059] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0060] Based on the above-mentioned technical problems, this embodiment proposes the following solutions:

[0061] Figure 1 This is a flowchart of a power coordination control method provided in an embodiment of this application. See also... Figure 1 The power coordination control method provided in this application includes:

[0062] S101. Obtain the current operating status information of the off-grid source-grid-load-storage system. The current operating status information includes the current frequency information of the off-grid source-grid-load-storage system, the response speed of controllable resources, and the current adjustability of controllable resources. The current adjustability of controllable resources includes the current output power of new energy power generation equipment, the current input power of load, and the current output power or current input power of energy storage equipment.

[0063] Specifically, the energy-grid-load-storage system, or "source-grid-storage" for short, refers to the organic integration of four links: energy production (source), energy transmission network (grid), energy consumption (load), and energy storage (storage), forming an efficient, intelligent, and sustainable energy system. In this system, each link works together to achieve efficient energy utilization and environmental protection.

[0064] The challenge of off-grid power generation, grid-load, and energy storage systems lies in ensuring their stability and security. The stability of such systems is related to their real-time operational status information. This information includes the real-time operational status of renewable energy generation equipment (such as wind power and photovoltaic power generation equipment), energy storage devices, and loads. The current frequency information of the off-grid system includes the number of times the AC power of the system completes the cycle from 0 to the forward maximum value, then back to the reverse maximum value, and finally back to 0 per unit time. This current frequency information represents the current frequency of the off-grid power generation, grid-load, and energy storage system.

[0065] Controllable resources can include new energy power generation equipment, loads, and energy storage equipment. New energy power generation equipment refers to equipment that generates electricity using renewable energy sources (such as solar, wind, and hydropower), and can include photovoltaic power generation equipment and wind power generation equipment. Loads can include adjustable loads, which are electrical devices whose power consumption can be adjusted in real time according to the load capacity of the power generation, grid, load, and storage system to meet the system's needs. Adjustable loads can include any one or more of hydrogen production units, charging piles, or air conditioners. Energy storage equipment can include at least one of power-type energy storage equipment and energy-type energy storage equipment.

[0066] The current adjustability of controllable resources includes the current output power of new energy power generation equipment, the current input power of load, and the current output power or current input power of energy storage equipment.

[0067] The response speed of a controllable resource refers to how much active power it can increase or decrease per second. The more active power a controllable resource can increase or decrease per second, the faster its response speed. The adjustability of a controllable resource refers to the maximum active power it can achieve.

[0068] S102. Based on the current frequency information, output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system.

[0069] Specifically, frequency change refers to the difference between the current frequency and the target frequency of an off-grid power-source-load-storage system. The target frequency can include the power frequency or the frequency at a specific historical moment. Frequency change rate refers to the amount of frequency change per unit time. Frequency change quantity is used to represent the value of frequency change. Frequency change rate is used to represent the speed of frequency change.

[0070] S103. Determine the power demand of the off-grid source-grid-load-storage system based on the frequency change. The power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency.

[0071] Specifically, based on the magnitude of the frequency change and the relationship between the frequency change and power demand, the power demand of the off-grid source-grid-load-storage system is determined. Power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency.

[0072] S104. Based on the rate of change of frequency and the response speed of the controllable resource, the target controllable resource is obtained. The target controllable resource is the controllable resource with a response speed closest to the rate of change of frequency.

[0073] Specifically, since different controllable resources have different response speeds, the faster the frequency change rate, the faster the response speed of the controllable resource needs to be. The controllable resource with the closest response speed to the frequency change rate can be determined based on this. The target controllable resource is the controllable resource with the closest response speed to the frequency change rate. This setting allows the target controllable resource to quickly compensate for power deficits, thereby improving the stability of the off-grid power-source-load-storage system more rapidly.

[0074] S105. Determine the target operating power of the target control resources based on the power demand and the current adjustability of the target control resources.

[0075] Specifically, the target operating power is the target output power or target input power of the controllable resource. When the current adjustable capability of the target control resource can meet the power demand, the power demand can be supplemented by using only the target control resource. The target control resource outputs or absorbs power equal to the power demand, thereby achieving stable power regulation of the off-grid source-grid-load-storage system without needing to call other controllable resources, thus improving the efficiency of power regulation in the off-grid source-grid-load-storage system.

[0076] S106. Send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

[0077] Specifically, the target frequency refers to the frequency required for the off-grid power generation, grid-load-storage system to achieve power stability. Since the target control resource is a controllable resource with a response speed closest to the frequency change rate, sending the target operating power to the target control resource enables it to output the target output power or absorb the target input power, thereby adjusting the frequency of the off-grid power generation, grid-load-storage system to the target frequency.

[0078] If the target frequency cannot be reached after adjustment in step S106, it indicates that the current adjustable capability of the target control resource cannot meet the power demand. When the current adjustable capability of the target control resource cannot meet the power demand, the target control resource can be controlled to output all power, and the power difference between the power demand and the target operating power of the target control resource can be provided by controllable resources other than the target control resource. This can achieve stable power regulation of the off-grid source-grid-load-storage system and quickly make up for the power deficit, thus improving the efficiency of power regulation of the off-grid source-grid-load-storage system.

[0079] The power coordination control method provided in this embodiment obtains the current operating status information of the off-grid source-grid-load-storage system, considers the power regulation characteristics and constraints of the off-grid source-grid-load-storage system, and combines the response requirements of the frequency change and frequency change rate of the off-grid source-grid-load-storage system to the actual power and controllable resources. Based on the frequency change rate and the response speed of the controllable resources, the target control resource is obtained. The target operating power of the target control resource is determined according to the power demand related to the frequency change and the current adjustability of the target control resource. Finally, power control is performed based on the target operating power of the target control resource. This method can not only achieve stable power regulation of the off-grid source-grid-load-storage system, but also quickly make up for the power deficit, thus improving the efficiency and safety of power regulation of the off-grid source-grid-load-storage system.

[0080] In one embodiment, obtaining the current operating status information of the off-grid source-grid-load-storage system includes: obtaining the current frequency information of the off-grid source-grid-load-storage system; obtaining the current output power of the new energy power generation equipment, the current input power of the load, and the current output power or current input power of the energy storage equipment; and obtaining the response speed of the new energy power generation equipment, the response speed of the load, and the response speed of the energy storage equipment.

[0081] Controllable resources can include wind power generation equipment, photovoltaic power generation equipment, adjustable loads, and energy storage equipment; the adjustability of controllable resources includes the power adjustability of energy storage equipment, the predicted output power of new energy power generation equipment, and the predicted input power of the load.

[0082] Specifically, the predicted output power of wind power generation equipment, the predicted output power of photovoltaic power generation equipment, and the predicted input power of the load can be used to match the adjustability of each controllable resource when the adjustability of the target control resources cannot meet the power demand.

[0083] In one embodiment, determining the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system based on current frequency information includes:

[0084] Step 1: Determine the frequency change based on the difference between the current frequency information of the off-grid source-grid-load-storage system and the target frequency. The target frequency may include the power frequency or the frequency at a specific historical moment.

[0085] For example, the power frequency is typically 50Hz. The frequency change Δf can be calculated using the following formula:

[0086] Δf = |50 - f|

[0087] Where f is the current frequency of the off-grid source-grid-load-storage system, and 50 is the power frequency.

[0088] Step 2: Determine the frequency change rate by the ratio of the difference between the current frequency and the previous frequency of the off-grid source-grid-load-storage system to the sampling period.

[0089] Specifically, the rate of change of frequency df / dt is calculated using the following formula:

[0090]

[0091] Where f is the current frequency of the off-grid source-grid-load-storage system, f T-1 The frequency of the off-grid source-grid-load-storage system at the previous moment is T, and the sampling period is T.

[0092] In one embodiment, determining the power demand of an off-grid source-grid-load-storage system based on the frequency change includes: determining the power demand based on a comparison between the frequency change and a preset frequency change threshold.

[0093] Specifically, the calculation method for power demand ΔP is as follows:

[0094] ΔP = k * Δf, Δf > f 门槛

[0095] ΔP=0, Δf≤f 门槛

[0096] In the formula, k is a constant, which is determined through simulation based on the relationship between the frequency change and the power change; f 门槛 The preset frequency variation threshold can be set according to the frequency dead zone control accuracy of the off-grid source-grid-load-storage system, such as f. 门槛 A frequency of 0.033Hz is generally selected.

[0097] In one embodiment, the target control resource is obtained based on the frequency change rate and the response speed of the controllable resource, including: when the frequency change rate is greater than the response speed of the photovoltaic power generation equipment, the target control resource is determined to be an energy storage device; when the frequency change rate is greater than the response speed of the adjustable load, the target control resource is determined to be a photovoltaic power generation equipment; when the frequency change rate is greater than the response speed of the wind power generation equipment, the target control resource is determined to be an adjustable load.

[0098] Specifically, the measured response speed of each controllable resource when connected to the source-grid-load-storage system is: V ess >V pv >V H2 >V wind , where V ess V represents the response speed of energy storage devices. pv V represents the response speed of photovoltaic power generation equipment. load For the response speed of adjustable loads, V wind The response speed of the wind power generation equipment is used. The frequency change rate and the response speed of each controllable resource are used as the criteria for determining the target control resource. Specifically: if the frequency change rate df / dt > V... pv In this situation, the system frequency change rate is high. To ensure that the frequency of the off-grid source-grid-load-storage system recovers to the target frequency as quickly as possible, energy storage devices are prioritized as the target control resource based on the response speed of each controllable resource. If the frequency change rate df / dt > V 1oad Since the response speed of photovoltaic power generation equipment is faster than that of adjustable loads, photovoltaic power generation equipment is preferentially selected as the target control resource; if the rate of change of frequency df / dt > V wind Since the response speed of adjustable loads is faster than that of wind power generation equipment, adjustable loads are preferred as the target control resource.

[0099] This configuration ensures that the response speed of the target control resources can meet the frequency change rate of the off-grid source-grid-load-storage system, facilitating rapid and stable frequency regulation of the off-grid system. It also avoids wasting controllable resources with faster response times, reserving these resources for use when higher frequency change rate regulation is needed. Furthermore, it improves the speed and efficiency of power stability regulation in the off-grid source-grid-load-storage system, thereby further enhancing the power and frequency stability of the off-grid system.

[0100] In one embodiment, when the rate of change of frequency is less than the response speed of the wind power generation equipment, the target control resource is matched to the wind power generation equipment.

[0101] Specifically, if the rate of change of frequency df / dt < V windIn this scenario, the frequency variation rate of the off-grid power generation and storage system is lower than the response speed of wind power equipment. Since wind power equipment has the slowest response speed among adjustable resources, any one of the controllable resources—new energy power generation equipment, adjustable load, or energy storage equipment—can be selected for power control response. However, to ensure the off-grid power generation and storage system has sufficient capacity to handle future emergencies, wind power equipment is prioritized as the target control resource. This configuration reserves fast-responding controllable resources to address other emergencies, further ensuring the safety of the off-grid power generation and storage system.

[0102] Optional, Figure 2 This is a flowchart of another power coordination control method provided in the embodiments of this application.

[0103] See Figure 2 The power coordination control method provided in this application includes:

[0104] S101. Obtain the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information, response speed of controllable resources, and current adjustability of controllable resources of the off-grid source-grid-load-storage system.

[0105] S102. Based on the current frequency information, output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system.

[0106] S103. Determine the power demand of the off-grid source-grid-load-storage system based on the frequency change.

[0107] S104. Based on the frequency change rate and the response speed of the controllable resources, obtain the target controllable resources.

[0108] It should be noted that steps S101 to S104 and step S106 have the same function as in the above embodiments, and will not be described again here. The power coordination control method provided in this embodiment differs from the above embodiments in steps S201 to S203, as follows:

[0109] S201. Compare the adjustability of the i-th level target control resource with the power demand; the target control resource includes the i-th level target control resource to the (i+m)-th level target control resource; the response speed of the i-th level target control resource to the (i+m)-th level target control resource decreases sequentially; i and m are both positive integers greater than or equal to 1 and less than or equal to 3; i+m is a positive integer greater than or equal to 1 and less than or equal to 4.

[0110] S202. When the adjustability of the i-th level target control resource is greater than or equal to the power demand, the target operating power of the i-th level target control resource is determined to be the sum of the current output power or input power of the i-th level target control resource and the power demand.

[0111] S203. When the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the working priority of the (i+1)-th level target control resource is allocated to the (i+m)-th level target control resource according to the response speed of the controllable resource.

[0112] Specifically, the target control resources from level i to level i+m are all one of the following: energy storage equipment, photovoltaic power generation equipment, adjustable load, or wind power generation equipment. The target control resources include those from level i to level i+m. Since a target control resource is a controllable resource with a response speed closest to the rate of frequency change, the response speeds of the target control resources from level i to level i+m decrease progressively. For example, when m=1, the response speed of the level i target control resource is faster than that of the level i+1 target control resource. The level i target control resource is the fastest-responding controllable resource among those with a response speed closest to the rate of frequency change. The level i+m target control resource is the slowest-responding controllable resource among those with a response speed closest to the rate of frequency change.

[0113] For example, let's take i=1 as an example.

[0114] The adjustability and power requirements of the first-level target control resources are compared. The target control resources include the first-level target control resources. The first-level target control resources are the controllable resources with the fastest response speed among those with a response speed closest to the rate of frequency change.

[0115] Specifically, the difference or quotient between the adjustability and power demand of the first-level target control resources can be used to obtain a comparison result.

[0116] When the adjustability of the first-level target control resource is greater than or equal to the power demand, the target operating power of the first-level target control resource is determined to be the sum of the current output power or input power of the first-level target control resource and the power demand.

[0117] Specifically, this setup allows for the use of only the first-level target control resources without the need to call other controllable resources, reducing the complexity of resource scheduling and enabling faster replenishment of power demand. This improves the efficiency of power coordination control in off-grid source-grid-load-storage systems without wasting controllable resources that require rapid response.

[0118] When the adjustability of the first-level target control resource is less than the power demand, the target operating power of the first-level target control resource is determined as the full operating power, and the operating priority of controllable resources other than the first-level target control resource is allocated according to the response speed of the controllable resources.

[0119] Specifically, if the adjustability of the first-level target control resources cannot meet the power demand, the power deficit will be allocated by the remaining controllable resources according to the priority of response speed. This can quickly make up for the power demand, improve the efficiency of power coordination control of the off-grid source-grid-load-storage system, and avoid wasting controllable resources with fast response, thereby further improving the power stability of the off-grid source-grid-load-storage system.

[0120] S106. Send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

[0121] In one embodiment, the new energy power generation equipment may include photovoltaic power generation equipment and wind power generation equipment; the load includes adjustable load. The response speeds of controllable resources, from fastest to slowest, are as follows: the response speed of energy storage equipment is greater than that of photovoltaic power generation equipment, the response speed of photovoltaic power generation equipment is greater than that of adjustable load, and the response speed of adjustable load is greater than that of wind power generation equipment. The target controllable resource is one of energy storage equipment, photovoltaic power generation equipment, adjustable load, or wind power generation equipment.

[0122] Optionally, based on the above embodiments, when the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the operating priority of the (i+1)-th level target control resource to the (i+m)-th level target control resource is allocated according to the response speed of the controllable resource, including:

[0123] When the sum of the adjustable capabilities of the target control resources from level i to level i+m-1 is less than the power requirement, the target control resource at level i+m is determined according to the order of the response speed of the controllable resources from fastest to slowest; the target operating power of the target control resource at level i+m is determined according to the difference between the sum of the adjustable capabilities of the target control resources from level i to level i+m-1 and the power requirement, and the adjustable capability of the target control resource at level i+m.

[0124] For example, when i = 1 and m = 1, i + m = 2, we will use this as an example to illustrate the point.

[0125] When the adjustability of the first-level target control resource is less than the power demand, the target operating power of the first-level target control resource is determined as the full operating power. Based on the response speed of the controllable resources, the operating priority of controllable resources other than the first-level target control resource is allocated. This may include: when the adjustability of the first-level target control resource is less than the power demand, the second-level target control resource is determined according to the response speed of the controllable resources from fastest to slowest. The target control resources include the second-level target control resource.

[0126] Based on the difference between the adjustability and power demand of the first-level target control resource and the adjustability of the second-level target control resource, the target operating power of the second-level target control resource is determined.

[0127] Specifically, the second-level target control resource is the controllable resource with the fastest response speed among the controllable resources whose frequency change rate is closest to that of the first-level target control resource. This configuration allows both the second-level and first-level target control resources to jointly output or input power to regulate the power of the off-grid power-source-load-storage system to meet power demand. The first-level target control resource can output its full power, while the target operating power of the second-level target control resource can be the difference between the power demand and the output or input power of the target control resource.

[0128] Optionally, based on the above embodiments, for example, when i=1, m=2, i+m=3, this can be used as an example for illustration.

[0129] After determining the target operating power of the second-level target control resource based on the difference between the adjustability of the first-level target control resource and the power demand, and the adjustability of the second-level target control resource, the method may further include: when the sum of the adjustability of the first-level target control resource and the adjustability of the second-level target control resource is less than the power demand, determining the third-level target control resource according to the order of the response speed of the controllable resources from fastest to slowest; the target control resource includes the third-level target control resource.

[0130] The target operating power of the third-level target control resource is determined based on the difference between the power demand and the adjustability of the first-level target control resource and the second-level target control resource, and the adjustability of the third-level target control resource.

[0131] Specifically, the third-level target control resource is the controllable resource with the fastest response speed among the controllable resources whose frequency change rate is closest to that of the first-level and second-level target control resources. This configuration allows the third-level, second-level, and first-level target control resources to jointly output or input power to regulate the power of the off-grid source-grid-load-storage system to meet power demand. The first-level and second-level target control resources can output their full power, and the target operating power of the third-level target control resource can be the difference between the power demand and the output power of the first and second-level target control resources.

[0132] Optionally, for example, when i=1 and m=3, i+m=4, as an example for illustration. After determining the target operating power of the third-level target control resource based on the difference between the power demand and the adjustability of the first-level target control resource and the second-level target control resource, and the adjustability of the third-level target control resource, it may further include: when the sum of the adjustability of the first-level target control resource, the second-level target control resource, and the third-level target control resource is less than the power demand, determining the fourth-level target control resource according to the order of the controllable resources' response speed from fastest to slowest.

[0133] Based on the power demand and the differences between the adjustable capabilities of the first-level target control resources, the second-level target control resources, and the third-level target control resources, and the adjustable capabilities of the fourth-level target control resources, the target operating power of the fourth-level target control resources is determined.

[0134] Specifically, the fourth-level target control resource is the controllable resource with the fastest response speed among the controllable resources whose frequency change rate is closest to that of the first, second, and third-level target control resources. This configuration allows the fourth, third, second, and first-level target control resources to jointly output power, regulating the power to meet the power demand. The first, second, and third-level target control resources can all output full power. The target operating power of the fourth-level target control resource can be the difference between the power demand and the output power of the first, second, and third-level target control resources.

[0135] For example, the adjustability of controllable resources includes the power adjustability of energy storage devices (i.e., the current output power or current input power of energy storage devices), the predicted output power of new energy power generation devices, and the predicted input power of loads. For instance, the predicted output power of wind power generation devices, the predicted output power of photovoltaic power generation devices, and the predicted input power of loads can be used to match the adjustability of various controllable resources when the dispatchability of the target controllable resources cannot meet the power demand. The current adjustability of controllable resources includes the current output power of new energy power generation devices, the current input power of loads, and the current adjustability of energy storage devices.

[0136] The following uses energy storage devices as an example to illustrate the power coordination control method of this application embodiment.

[0137] Step 1: Determine the current adjustability of the energy storage device. The relationship with ΔP, if Then only the energy storage device is adjusted, and the power command value of the energy storage device's power output is P. ess +ΔP.

[0138] It should be noted that P ess This refers to the real-time active power of the energy storage device. This represents the current adjustable capacity of the energy storage device. If The energy storage device will then operate at the current real-time active power P ess Based on the existing power output, the power output is increased by ΔP. Therefore, only the energy storage device needs to be adjusted, and the power command value of the energy storage device's power output is P. ess +ΔP.

[0139] Step Two: If Then determine the adjustability of the photovoltaic power generation equipment. Is it greater than If so, the power command value of the photovoltaic power generation equipment is

[0140] It should be noted that P pv This refers to the real-time active power of photovoltaic power generation equipment. This refers to the current adjustability of photovoltaic power generation equipment. Greater than At that time, the photovoltaic power generation equipment needs to have its real-time active power P pv Based on this, the increased power output is the power demand ΔP minus the current adjustable capacity of the energy storage device. The power that is balanced out, i.e., the power command value of the photovoltaic power generation equipment.

[0141] Step 3: If Then determine the adjustability of the adjustable load. Is it greater than If so, the power command value for the adjustable load's power output is... It should be noted that the power output principle of adjustable load is similar to that of steps one and two, and will not be repeated here.

[0142] Step 4: If The power command for the power output of the wind power generation equipment is: It should be noted that the power output principle of wind power generation equipment is similar to that of steps one and two, and will not be repeated here.

[0143] Where ΔP is the power demand, P wind Real-time active power and P of wind power generation equipment in off-grid hydrogen production systems pv For the real-time active power of photovoltaic power generation equipment, P load For the real-time active power of adjustable load, P ess This refers to the real-time active power of the energy storage device. For the current adjustability of energy storage devices, The current adjustability of photovoltaic power generation equipment, This refers to the current adjustability of the adjustable load. For the predicted output power of wind power generation equipment, For the predicted output power of photovoltaic power generation equipment, This represents the predicted input power for adjustable loads. The current adjustability of the photovoltaic power generation equipment. Based on the predicted output power of photovoltaic power generation equipment Confirmed. Adjustable load's current adjustability. The predicted input power can be based on the adjustable load. Confirmed. Current adjustability of wind power generation equipment. Output power can be predicted based on wind power equipment. Sure.

[0144] The power coordination control method provided in this embodiment only needs to match the slow frequency change rate with controllable resources that have a slow response speed, while keeping controllable resources with a fast response speed to deal with other emergency events and ensure the safety of the off-grid source-grid-load-storage system.

[0145] Optional, Figure 3 This is a flowchart illustrating a method for determining a preset fault handling relationship table in a power coordination control method provided in this application. See also... Figure 3 The method for determining the preset fault handling relationship table provided in this application includes:

[0146] S301. Based on the grid structure of the source-grid-load-storage system, set the expected fault set and build an offline simulation model.

[0147] Specifically, the grid structure can include the topology of an off-grid source-grid-load-storage system. The topology includes lines and the equipment connected to those lines, such as transformers, power sources, loads, circuit breakers, and grounding devices. Anticipated fault set F i Specifically, this can include single-phase grounding faults, three-phase grounding faults, transformer faults, power supply tripping faults, and / or load tripping faults. An offline simulation model is built based on the actual grid structure of the off-grid power-source-load-storage system. The simulation model can be built using electromagnetic or electromechanical simulation software, incorporating wind, solar, and energy storage.

[0148] S302. Perform offline simulation of the anticipated fault set using a simulation model, determine the control mode based on the simulation results, and formulate a preset fault handling relationship table.

[0149] Specifically, offline simulations are performed on the anticipated fault set using a simulation model. Control methods are obtained from the simulation results, and finally, a preset fault handling relationship table is formed [F]. i C i In the formula, F i For the anticipated fault set, C i This corresponds to the control method.

[0150] Figure 4 This is a flowchart of another power coordination control method provided in an embodiment of this application. See also... Figure 4 The power coordination control method provided in this application includes:

[0151] S401. Adjust the power of the off-grid source-grid-load-storage system according to the preset fault handling relationship table; the fault handling relationship table includes the working power adjustment methods of controllable resources to eliminate different fault types in the off-grid source-grid-load-storage system.

[0152] Specifically, when a corresponding fault occurs, by querying the preset fault handling relationship table, corresponding protection measures can be taken quickly to prevent the collapse of the off-grid source-grid-load-storage system and further improve the power stability and safety of the off-grid source-grid-load-storage system.

[0153] It should be noted that, according to the working power adjustment method given in the preset fault handling relationship table, the power control cycle of the off-grid source-grid-load-storage system is shorter than the frequency acquisition cycle. For example, setting the power control cycle to 200ms and the frequency acquisition cycle to 300ms avoids redundant control, enables power control on multiple time scales, and improves the power regulation efficiency, safety, and reliability of the off-grid source-grid-load-storage system power coordination control method.

[0154] If the power of the off-grid source-grid-load-storage system stabilizes after adjusting the power in step S401, the process ends; if the power does not stabilize after adjusting the power of the off-grid source-grid-load-storage system in step S401, then step S101 is executed.

[0155] S101. Obtain the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information, response speed of controllable resources, and current adjustability of controllable resources of the off-grid source-grid-load-storage system.

[0156] S102. Based on the current frequency information, output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system.

[0157] S103. Determine the power demand of the off-grid source-grid-load-storage system based on the frequency change.

[0158] S104. Based on the frequency change rate and the response speed of the controllable resources, obtain the target controllable resources.

[0159] S105. Determine the target operating power of the target control resources based on the power demand and the current adjustability of the target control resources.

[0160] S106. Send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

[0161] Figure 5 This is a schematic diagram of a power coordination control device provided in an embodiment of this application. Based on the above embodiments, see also... Figure 5 The power coordination control device provided in this embodiment is used to control an off-grid source-grid-load-storage system. The power coordination control device includes:

[0162] The acquisition module 41 is used to acquire the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information of the off-grid source-grid-load-storage system, the response speed of controllable resources, and the current adjustability of controllable resources. The current adjustability of controllable resources includes the current output power of new energy power generation equipment, the current input power of load, and the current output power or current input power of energy storage equipment.

[0163] The frequency determination module 42 is used to output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system based on the current frequency information.

[0164] The power demand determination module 43 is used to determine the power demand of the off-grid source-grid-load-storage system based on the frequency change. The power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency.

[0165] Matching module 44 is used to obtain the target control resource based on the frequency change rate and the response speed of the controllable resource; the target control resource is the controllable resource with a response speed closest to the frequency change rate.

[0166] The target power determination module 45 is used to determine the target operating power of the target control resource based on the power demand and the current adjustability of the target control resource.

[0167] The execution control module 46 is used to send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

[0168] Optionally, the power demand determination module is further configured to determine the power demand based on a comparison between the frequency change and a preset frequency change threshold.

[0169] Optionally, the new energy power generation equipment includes photovoltaic power generation equipment and wind power generation equipment; the load includes adjustable load; the matching module is further configured to determine the target control resource as the energy storage device when the frequency change rate is greater than the response speed of the photovoltaic power generation equipment; determine the target control resource as the photovoltaic power generation equipment when the frequency change rate is greater than the response speed of the adjustable load; and determine the target control resource as the adjustable load when the frequency change rate is greater than the response speed of the wind power generation equipment.

[0170] Optionally, the matching module is further configured to identify the target control resource as the wind power generation equipment when the frequency change rate is less than the response speed of the wind power generation equipment.

[0171] Optionally, a target power determination module is used to compare the adjustability of the i-th level target control resource with the power demand; the target control resources include target control resources from level i to level (i+m); the response speed of the target control resources from level i to level (i+m) decreases sequentially; i and m are both positive integers greater than or equal to 1 and less than or equal to 3; i+m is a positive integer greater than or equal to 1 and less than or equal to 4; when the adjustability of the i-th level target control resource is greater than or equal to the power demand, the target operating power of the i-th level target control resource is determined to be the sum of the current output power or input power of the i-th level target control resource and the power demand; when the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the operating priority of the target control resources from level (i+1) to level (i+m) is allocated according to the response speed of the controllable resources.

[0172] Optionally, the target control resources from level i to level i+m are all one of the energy storage device, the photovoltaic power generation device, the adjustable load, or the wind power generation device; the target power determination module is further configured to determine the level i+m target control resource according to the order of the response speed of the controllable resources from fast to slow when the sum of the adjustable capabilities of the level i to level i+m-1 target control resources is less than the power demand; and to determine the target operating power of the level i+m target control resource based on the difference between the sum of the adjustable capabilities of the level i to level i+m-1 target control resources and the power demand, as well as the adjustable capability of the level i+m target control resource.

[0173] Optionally, the power coordination control device further includes: a first adjustment module, used to adjust the power of the off-grid source-grid-load-storage system according to a preset fault handling relationship table before obtaining the current operating status information of the off-grid source-grid-load-storage system; the fault handling relationship table includes controllable resource power adjustment methods adopted to eliminate different fault types occurring in the off-grid source-grid-load-storage system.

[0174] The power coordination control system provided in this application acquires the current operating status information of the off-grid source-grid-load-storage system through an acquisition module, determines the power regulation characteristics and constraints of the off-grid source-grid-load-storage system through a power demand determination module, and combines the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system with the actual power and controllable resource requirements through a frequency determination module. Through a matching module, a target power determination module, and an execution control module, power control is performed based on the response speed of controllable resources. This system can achieve stable power regulation of the off-grid source-grid-load-storage system and quickly make up for power deficits, thereby improving the efficiency of power regulation of the off-grid source-grid-load-storage system.

[0175] This embodiment provides an off-grid power generation, load, and energy storage system. The off-grid power generation, load, and energy storage system provided in this embodiment includes an energy storage device and a controller. The controller connects the new energy power generation device, the load, and the energy storage device. The controller is used to execute the power coordination control method proposed in any of the above embodiments. The controller may include the power coordination control device provided in any of the above embodiments.

[0176] This embodiment provides an electronic device, including at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the power coordination control method proposed in any of the first aspects.

[0177] This embodiment provides a computer-readable storage medium storing computer instructions that are used to cause a processor to execute the power coordination control method proposed in any of the above embodiments.

[0178] This embodiment provides a computer program product, which includes a computer program that, when executed by a processor, implements the power coordination control method proposed in any of the above embodiments.

[0179] Note that the above description is merely a preferred embodiment and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this application, and the scope of this application is determined by the scope of the appended claims.

Claims

1. A power coordination control method, characterized in that, The method for controlling an off-grid source-grid-load-storage system includes: Obtain the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information of the off-grid source-grid-load-storage system, the response speed of the controllable resources, and the current adjustability of the controllable resources. The current adjustability of the controllable resources includes the current output power of the new energy power generation equipment, the current input power of the load, and the current output power or current input power of the energy storage equipment. Based on the current frequency information, output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system; Based on the frequency change, the power demand of the off-grid source-grid-load-storage system is determined; the power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency. The target control resource is obtained based on the frequency change rate and the response speed of the controllable resource; the target control resource is the controllable resource with a response speed closest to the frequency change rate. Based on the power demand and the current adjustability of the target control resource, determine the target operating power of the target control resource; The target operating power is sent to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

2. The method according to claim 1, characterized in that, Determining the power demand of the off-grid source-grid-load-storage system based on the frequency change includes: The power requirement is determined based on the comparison between the frequency change and the preset frequency change threshold.

3. The method according to claim 1, characterized in that, The new energy power generation equipment includes photovoltaic power generation equipment and wind power generation equipment; the load includes adjustable load. The step of obtaining the target controllable resource based on the frequency change rate and the response speed of the controllable resource includes: When the frequency change rate is greater than the response speed of the photovoltaic power generation equipment, the target control resource is determined to be the energy storage device; When the frequency change rate is greater than the response speed of the adjustable load, the target control resource is determined to be the photovoltaic power generation equipment; When the frequency change rate is greater than the response speed of the wind power generation equipment, the target control resource is determined as the adjustable load.

4. The method according to claim 1 or 3, characterized in that, The new energy power generation equipment includes photovoltaic power generation equipment and wind power generation equipment; the load includes adjustable load; the method of obtaining the target control resource based on the frequency change rate and the response speed of the controllable resource further includes: When the frequency change rate is less than the response speed of the wind power generation equipment, the target control resource is determined to be the wind power generation equipment.

5. The method according to claim 3, characterized in that, Determining the target operating power of the target control resource based on its adjustability and power demand includes: The adjustability of the i-th level target control resource is compared with the power requirement; the target control resource includes target control resources from the i-th level to the (i+m)-th level; the response speed of the target control resource from the i-th level to the (i+m)-th level decreases sequentially; i and m are both positive integers greater than or equal to 1 and less than or equal to 3; i+m is a positive integer greater than or equal to 1 and less than or equal to 4. When the adjustability of the i-th level target control resource is greater than or equal to the power demand, the target operating power of the i-th level target control resource is determined to be the sum of the current output power or input power of the i-th level target control resource and the power demand. When the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the operating priority of the (i+1)-th level target control resource is allocated to the (i+m)-th level target control resource according to the response speed of the controllable resource.

6. The method according to claim 5, characterized in that, When the adjustability of the i-th level target control resource is less than the power demand, the target operating power of the i-th level target control resource is determined to be the full operating power, and the operating priority of the (i+1)-th level target control resource to the (i+m)-th level target control resource is allocated according to the response speed of the controllable resource, including: The target control resources from the i-th level to the (i+m)-th level are all one of the energy storage device, the photovoltaic power generation device, the adjustable load, or the wind power generation device. When the sum of the adjustable capabilities of the target control resources from level i to level i+m-1 is less than the power demand, the target control resources of level i+m are determined according to the order of the response speed of the controllable resources from fastest to slowest. The target operating power of the (i+m)th level target control resource is determined based on the difference between the sum of the adjustability of the target control resources from the (i+m-1)th level to the (i+m-1)th level and the power requirement, and the adjustability of the (i+m)th level target control resource.

7. The method according to claim 1, characterized in that, Before obtaining the current operating status information of the off-grid source-grid-load-storage system, the method further includes: According to the preset fault handling relationship table, the power of the off-grid source-grid-load-storage system is adjusted; the fault handling relationship table includes the working power adjustment methods of controllable resources to eliminate different fault types in the off-grid source-grid-load-storage system.

8. A power coordination control device, characterized in that, The power coordination control device, used for controlling off-grid source-grid-load-storage systems, includes: The acquisition module is used to acquire the current operating status information of the off-grid source-grid-load-storage system. The operating status information includes the current frequency information of the off-grid source-grid-load-storage system, the response speed of the controllable resources, and the current adjustability of the controllable resources. The current adjustability of the controllable resources includes the current output power of the new energy power generation equipment, the current input power of the load, and the current output power or current input power of the energy storage equipment. The frequency determination module is used to output the frequency change amount and frequency change rate of the off-grid source-grid-load-storage system based on the current frequency information. The power demand determination module is used to determine the power demand of the off-grid source-grid-load-storage system based on the frequency change; the power demand refers to the power deficit required for the off-grid source-grid-load-storage system to adjust from the current frequency to the target frequency. A matching module is used to obtain a target control resource based on the frequency change rate and the response speed of the controllable resource; the target control resource is a controllable resource with a response speed closest to the frequency change rate. The target power determination module is used to determine the target operating power of the target control resource based on the power demand and the current adjustability of the target control resource. The execution control module is used to send the target operating power to the target control resource to perform power control, so as to adjust the frequency of the off-grid source-grid-load-storage system to the target frequency.

9. An off-grid source-grid-load-storage system, characterized in that, It includes an energy storage device and a controller, wherein the controller is connected to the new energy power generation equipment, the load and the energy storage device, and the controller is used to execute the power coordination control method described in any one of 1 to 7.

10. An electronic device, characterized in that, include: At least one processor; The at least one processor is also connected in communication with a memory, wherein the memory stores a computer program that can be executed by the at least one processor to enable the at least one processor to perform the power coordination control method according to any one of claims 1 to 7.

11. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the power coordination control method according to any one of claims 1 to 7.

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