Power distribution method, device, energy storage power station and storage medium

Abstract

The present application relates to a power distribution method, device, energy storage system and storage medium. The method obtains the total power of the energy storage system and the current power demand of multiple grid-connected systems; obtains the power sent by each corresponding grid-connected system according to the total power and each current power demand; detects the operating parameter data of each grid-connected system, and processes each sent power according to each operating parameter data to obtain each optimized sent power; based on each optimized sent power, charges and discharges the corresponding grid-connected system, so as to achieve balanced power distribution and balanced battery use for each grid-connected system, avoid overcharging or over-discharging of batteries in the energy storage system, ensure stable operation of the energy storage power station, and reduce costs.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a power distribution method, device, energy storage power station and storage medium. Background Art

[0002] The energy management system (EMS) is the decision-making center of the electrochemical energy storage power station. In the energy storage system, the EMS can be used to distribute power to all grid-connected systems in the station.

[0003] In the power distribution method of existing energy storage power stations, there is an imbalance in power distribution and imbalance in charging and discharging between batteries. For example, directly distributing power evenly to each grid-connected system for charging and discharging can easily lead to overcharging or over-discharging of the battery, reducing the operating stability of the energy storage system and increasing operating costs. Summary of the invention

[0004] Based on this, it is necessary to provide a power distribution method, device, energy storage power station and storage medium that can balance power distribution and battery usage, avoid overcharging or over-discharging of batteries, ensure stable operation of energy storage power stations, and reduce costs in response to the technical problems existing in the power distribution method of the above-mentioned existing energy storage power stations.

[0005] In a first aspect, the present application provides a power allocation method, comprising the following steps:

[0006] Obtain the total power of the energy storage system and the current required power of multiple grid-connected systems;

[0007] According to the total power and the current required power, the power sent by each corresponding grid-connected system is obtained;

[0008] Detect the operating parameter data of each grid-connected system, and process each transmitted power according to each operating parameter data to obtain each optimized transmitted power;

[0009] Based on the optimized transmitted power, the corresponding grid-connected system is charged and discharged.

[0010] In one embodiment, the step of obtaining the power delivered by each corresponding grid-connected system according to the total power and each current required power includes:

[0011] According to each current required power, the total required power is obtained;

[0012] According to each current power demand and total power demand, the power demand ratio of each grid-connected system is obtained;

[0013] The steps of obtaining the power sent down by each corresponding grid-connected system according to the total power and each current required power include:

[0014] According to the total power and the proportion of each power demand, the power sent down by each corresponding grid-connected system is obtained.

[0015] In one embodiment, the operating parameter data includes temperature data;

[0016] The steps of processing each transmitted power according to each operating parameter data to obtain each optimized transmitted power include:

[0017] When the temperature data does not fall within the temperature threshold range, the corresponding transmitted power that does not fall within the temperature threshold range is updated to 0;

[0018] When the temperature data falls within the temperature threshold range, the power sent corresponding to the temperature data falling within the temperature threshold range is maintained unchanged.

[0019] In one of the embodiments, the operating parameter data further includes voltage data;

[0020] The steps of processing each transmitted power according to each operating parameter data to obtain each optimized transmitted power include:

[0021] When the voltage data does not fall within the voltage threshold range, the corresponding power sent when the voltage data does not fall within the voltage threshold range is updated to 0;

[0022] When the voltage data falls within the voltage threshold range, the transmitted power corresponding to the voltage data falling within the voltage threshold range is maintained unchanged.

[0023] In one embodiment, the operating parameter data further includes SOC data;

[0024] The steps of processing each transmitted power according to each operating parameter data to obtain each optimized transmitted power include:

[0025] When the SOC data does not fall within the SOC threshold range, the corresponding downlink power of the SOC data not falling within the SOC threshold range is updated to 0;

[0026] When the SOC data falls within the SOC threshold range, the sending power corresponding to the SOC data falling within the SOC threshold range is maintained unchanged.

[0027] In one embodiment, after the step of processing each transmitted power according to each operating parameter data to obtain each optimized transmitted power, the following steps are included:

[0028] When the transmitted power of the corresponding grid-connected system exceeds the first power threshold of the corresponding grid-connected system, updating the transmitted power of the corresponding grid-connected system to the first power threshold of the corresponding grid-connected system;

[0029] When the transmitted power of the corresponding grid-connected system does not exceed the first power threshold of the corresponding grid-connected system, the transmitted power of the corresponding grid-connected system is maintained unchanged.

[0030] In one embodiment, the operating parameter data also includes the current actual power; and after the step of detecting the operating parameter data of each grid-connected system, the following steps are included:

[0031] When the current actual power exceeds the second power threshold, the transmitted power corresponding to the current actual power exceeding the second power threshold is updated to 0.

[0032] In a second aspect, the present application provides a power distribution device, comprising:

[0033] A power acquisition unit, used to acquire the total power of the energy storage system and the current required power of multiple grid-connected systems;

[0034] The power distribution unit is used to obtain the power sent by each corresponding grid-connected system according to the total power and the current required power;

[0035] The power optimization unit is used to detect the operating parameter data of each grid-connected system, and process each transmitted power according to each operating parameter data to obtain each optimized transmitted power;

[0036] The power sending unit is used to charge and discharge the corresponding grid-connected system based on the optimized sent power.

[0037] In a third aspect, the present application provides an energy storage power station, including an energy storage system and various grid-connected systems. The energy storage system is provided with an energy management system, which is respectively connected to the various grid-connected systems. The energy management system is used to execute the steps of any of the above-mentioned power allocation methods.

[0038] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any one of the above-mentioned power allocation methods are implemented.

[0039] One of the above technical solutions has the following advantages and beneficial effects:

[0040] In the above-mentioned power allocation method, the total power of the energy storage system and the current power demand of multiple grid-connected systems are obtained; the power sent down by each corresponding grid-connected system is obtained according to the total power and each current power demand; the operating parameter data of each grid-connected system is detected, and each sent down power is processed according to each operating parameter data to obtain each optimized sent down power; based on each optimized sent down power, the corresponding grid-connected system is charged and discharged to achieve balanced power distribution for each grid-connected system. The present application allocates the sent down power according to the current power demand of each grid-connected system, and after allocating the sent down power of each grid-connected system, the operating parameter data of each grid-connected system is detected to adjust the sent down power to achieve optimization of the sent down power, thereby charging and discharging the corresponding grid-connected system based on the optimized sent down power to achieve balanced power distribution and balanced battery use, avoid overcharging or over-discharging of batteries in the energy storage system, ensure stable operation of the energy storage power station, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of an application scenario of the power allocation method in an embodiment of the present application;

[0042] Figure 2 This is a schematic diagram of a first process of a power allocation method in an embodiment of the present application;

[0043] Figure 3 This is a flow chart of the temperature data processing steps in the embodiment of the present application;

[0044] Figure 4 Schematic diagram of the process of voltage data processing in the embodiment of the present application;

[0045] Figure 5 This is a flow chart of the SOC data processing steps in the embodiment of the present application;

[0046] Figure 6 This is a flow chart of the power processing steps in the embodiment of the present application;

[0047] Figure 7 Schematic diagram of a power distribution device according to an embodiment of the present application;

[0048] Figure 8 It is a schematic diagram of the structure of the energy storage power station in the embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] In addition, the term "plurality" shall mean two or more.

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] The power allocation method provided in this application can be applied to Figure 1 In the application environment shown. Among them, the processing device may include a processor 102 and a memory 104, and the memory 104 may be used to store data such as total power, current demand power, operating parameter data, and optimized power transmission. The processor 102 may be used to obtain the total power of the energy storage system and the current demand power of multiple grid-connected systems; according to the total power and each current demand power, obtain the power transmission of each corresponding grid-connected system; detect the operating parameter data of each grid-connected system, and according to each operating parameter data, process each power transmission to obtain each optimized power transmission; based on each optimized power transmission, charge and discharge the corresponding grid-connected system. The processing device may also include a display 106, which may display data such as total power, current demand power, operating parameter data, and optimized power transmission through a graphical interface.

[0054] Exemplarily, the processing device may be an energy management system, and the processing device may be arranged in an energy storage system, the energy storage system and each grid-connected system constitute an energy storage power station, and the energy management system is respectively connected to each grid-connected system. In another example, the energy storage power station further includes a power storage converter (PCS), a first side end of the energy storage converter is connected to the energy storage system, and a second side end of the energy storage converter is respectively connected to each grid-connected system.

[0055] In one embodiment, Figure 2 As shown, a power distribution method is provided, which is applied to Figure 1 The processor 102 in the embodiment is taken as an example to illustrate, and the following steps are included:

[0056] Step S210, obtaining the total power of the energy storage system and the current required power of multiple grid-connected systems.

[0057] The total power of the energy storage system may be the total charging power or the total discharging power, and correspondingly, the current required power of the grid-connected system may be the current required charging power or the current required discharging power.

[0058] Exemplarily, when a power allocation request is received, the total power of the energy storage system is queried according to the power allocation request, thereby obtaining the total power of the energy storage system; power demand instructions can also be transmitted to each grid-connected system according to the power allocation request, and each grid-connected system feeds back the corresponding current demand power according to the demand instruction, thereby obtaining the current demand power of each grid-connected system.

[0059] Step S220: Obtain the power sent by each corresponding grid-connected system according to the total power and each currently required power.

[0060] The transmitted power may be the transmitted charging power or the transmitted discharging power.

[0061] According to the acquired total power and each current required power, the total power and each current required power are processed to obtain the power sent down by each corresponding grid-connected system.

[0062] Step S230, detecting the operating parameter data of each grid-connected system, and processing each transmitted power according to each operating parameter data to obtain each optimized transmitted power.

[0063] The operating parameters may include but are not limited to electrical parameters and environmental characteristic parameters.

[0064] For example, several sensor modules may be provided to detect the operating parameters of the corresponding grid-connected systems in real time through the sensor modules, and the detected operating parameter data may be transmitted to the processor, and then the processor may obtain the operating parameter data of each corresponding grid-connected system.

[0065] The processor can optimize the transmitted powers according to the acquired operating parameter data. For example, a critical value can be set for the corresponding operating parameter, and each operating parameter data can be compared with the corresponding critical value. According to the result of the comparison, each transmitted power is optimized and adjusted, thereby obtaining the optimized transmitted power corresponding to each grid-connected system.

[0066] Step S240: Based on each optimized transmitted power, the corresponding grid-connected system is charged and discharged.

[0067] For example, each optimized transmitted power is transmitted to the energy storage converter, and each grid-connected system is charged and discharged through the energy storage converter, so that the grid-connected system is charged and discharged according to the corresponding optimized transmitted power.

[0068] In the above-mentioned embodiments, the total power of the energy storage system and the current power demand of multiple grid-connected systems are obtained; the power sent down of each corresponding grid-connected system is obtained according to the total power and each current power demand; the operating parameters of each grid-connected system are detected to obtain the operating parameter data of each corresponding grid-connected system; each sent down power is processed according to each operating parameter data to obtain each optimized sent down power; based on each optimized sent down power, each grid-connected system corresponding to the optimized sent down power is charged and discharged to achieve balanced power distribution of each grid-connected system. The present application allocates the sent down power according to the current power demand of each grid-connected system, and after allocating the sent down power of each grid-connected system, the operating parameter data of each grid-connected system is detected to adjust the sent down power to achieve optimization of the sent down power, thereby charging and discharging the corresponding grid-connected system based on the optimized sent down power to achieve balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system, ensuring stable operation of the energy storage power station, and reducing costs.

[0069] In one example, the step of obtaining the power delivered by each corresponding grid-connected system according to the total power and each currently required power includes:

[0070] According to each current power demand, the total power demand is obtained; according to each current power demand and the total power demand, the power demand ratio of each grid-connected system is obtained.

[0071] For example, the grid-connected system may include a battery management system (BMS), which transmits a power demand instruction to the BMS of each grid-connected system, and then the BMS of each grid-connected system feeds back the corresponding current demand power according to the demand instruction, thereby obtaining the current demand power of each grid-connected system; by accumulating each current demand power, the total demand power is obtained; by dividing the current demand power by the total demand power, the power demand ratio of the corresponding grid-connected system is obtained. It should be noted that the current demand power may be the maximum demand power that can be charged or discharged by the corresponding grid-connected system.

[0072] In one example, the step of obtaining the power delivered by each corresponding grid-connected system according to the total power and each current required power includes:

[0073] According to the total power and the proportion of each power demand, the power sent down by each corresponding grid-connected system is obtained.

[0074] By multiplying the power demand ratio of each grid-connected system by the total power, the power sent by each corresponding grid-connected system is obtained. Furthermore, after allocating the power sent by each grid-connected system, the operating parameter data of each grid-connected system is detected to adjust the power sent, thereby optimizing the power sent, and charging and discharging the corresponding grid-connected system based on the optimized power sent, achieving balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system, ensuring stable operation of the energy storage power station, and reducing costs.

[0075] In one embodiment, the operating parameter data includes temperature data; Figure 3 As shown, according to each operating parameter data, each downlink power is processed to obtain each optimized downlink power, including:

[0076] Step S310: When the temperature data does not fall within the temperature threshold range, the transmitted power corresponding to the temperature data not falling within the temperature threshold range is updated to 0.

[0077] For example, the temperature of the corresponding grid-connected system may be detected by a temperature sensor, thereby obtaining the temperature data of the corresponding grid-connected system.

[0078] By comparing the temperature data of each grid-connected system with the temperature threshold range, when the temperature data does not fall within the temperature threshold range, it is determined that the corresponding grid-connected system is in an over-temperature or under-temperature state, and then the corresponding power sent when the temperature data does not fall within the temperature threshold range is updated to 0, that is, no power is sent to the grid-connected system whose temperature data does not fall within the temperature threshold range, thereby improving the safety and reliability of power distribution.

[0079] Step S320: When the temperature data falls within the temperature threshold range, the power sent corresponding to the temperature data falling within the temperature threshold range is maintained unchanged.

[0080] By comparing the temperature data of each grid-connected system with the temperature threshold range, when the temperature data falls into the temperature threshold range, it is determined that the temperature of the corresponding grid-connected system is in a safe state, and then the corresponding power distribution of the temperature data falling into the temperature threshold range is maintained unchanged, thereby optimizing the power distribution of each grid-connected system, and charging and discharging the corresponding grid-connected system based on the optimized power distribution, achieving balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system, ensuring stable operation of the energy storage power station, and reducing costs.

[0081] In the above embodiment, by flexibly allocating the power of each grid-connected system, the energy management system has a higher level of intelligence. At the same time, without affecting the hardware performance of the energy management system, the computing power of the energy management system is improved to ensure the stable operation of the energy storage system and reduce the operating costs.

[0082] In one embodiment, the operating parameter data also includes voltage data; Figure 4 As shown, according to each operating parameter data, each downlink power is processed to obtain each optimized downlink power, including:

[0083] Step S410: when the voltage data does not fall within the voltage threshold range, the transmitted power corresponding to the voltage data not falling within the voltage threshold range is updated to 0.

[0084] For example, the voltage of the corresponding grid-connected system may be detected by a voltage sensor, thereby obtaining voltage data of the corresponding grid-connected system.

[0085] By comparing the voltage data of each grid-connected system with the voltage threshold range, when the voltage data does not fall within the voltage threshold range, it is determined that the corresponding grid-connected system is in an overvoltage or undervoltage state, and then the corresponding power sent down for the voltage data that does not fall within the voltage threshold range is updated to 0, that is, no power is sent down to the grid-connected system whose voltage data does not fall within the voltage threshold range, thereby further improving the safety and reliability of power distribution.

[0086] Step S420: When the voltage data falls within the voltage threshold range, the transmitted power corresponding to the voltage data falling within the voltage threshold range is maintained unchanged.

[0087] By comparing the voltage data of each grid-connected system with the voltage threshold range, when the voltage data falls into the voltage threshold range, it is determined that the voltage of the corresponding grid-connected system is in a safe state, and then the corresponding power distribution of the voltage data falling into the voltage threshold range is maintained unchanged, thereby optimizing the power distribution of each grid-connected system, and charging and discharging the corresponding grid-connected system based on the optimized power distribution, achieving balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system, ensuring stable operation of the energy storage power station, and reducing costs.

[0088] In one embodiment, the operating parameter data also includes SOC (State Of Charge) data; Figure 5 As shown, according to each operating parameter data, each downlink power is processed to obtain each optimized downlink power, including:

[0089] Step S510: when the SOC data does not fall within the SOC threshold range, the sending power corresponding to the SOC data not falling within the SOC threshold range is updated to 0.

[0090] For example, the SOC of the corresponding grid-connected system can be detected by the BMS, and then the SOC data of the corresponding grid-connected system can be obtained.

[0091] By comparing the SOC data of each grid-connected system with the SOC threshold range (such as set to 5%-95%), when the SOC data does not fall within the SOC threshold range, it is determined that the corresponding grid-connected system is in an unstable battery state, and then the corresponding power sent when the SOC data does not fall within the SOC threshold range is updated to 0, that is, no power is sent to the grid-connected system whose SOC data does not fall within the SOC threshold range, thereby further improving the safety and reliability of power distribution.

[0092] Step S520: When the SOC data falls within the SOC threshold range, the sending power corresponding to the SOC data falling within the SOC threshold range is maintained unchanged.

[0093] By comparing the SOC data of each grid-connected system with the SOC threshold range, when the SOC data falls into the SOC threshold range, it is determined that the SOC of the corresponding grid-connected system is in a stable state, and then the corresponding power sent when the SOC data falls into the SOC threshold range is maintained unchanged, thereby optimizing the sent power of each grid-connected system, and charging and discharging the corresponding grid-connected system based on the optimized sent power, achieving balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system, ensuring stable operation of the energy storage power station, and reducing costs.

[0094] In one embodiment, Figure 6 As shown, according to each operating parameter data, each downlink power is processed to obtain each optimized downlink power, and then the steps include:

[0095] Step S610: When the transmitted power of the corresponding grid-connected system exceeds the first power threshold of the corresponding grid-connected system, the transmitted power of the corresponding grid-connected system is updated to the first power threshold of the corresponding grid-connected system.

[0096] By comparing the transmitted power of each grid-connected system with the corresponding first power threshold, when the transmitted power exceeds the first power threshold, it is determined that the charging power and / or discharging power of the corresponding grid-connected system is too large, and then the transmitted power of the corresponding grid-connected system is updated to the corresponding first power threshold, thereby achieving optimized adjustment of the transmitted power of the corresponding grid-connected system.

[0097] Step S620: When the transmitted power of the corresponding grid-connected system does not exceed the first power threshold of the corresponding grid-connected system, the transmitted power of the corresponding grid-connected system is maintained unchanged.

[0098] By comparing the transmitted power of each grid-connected system with the first power threshold, when the transmitted power does not exceed the first power threshold, it is determined that the charging power and / or discharging power of the corresponding grid-connected system is within an appropriate range, and then the transmitted power of the corresponding grid-connected system is maintained unchanged, thereby optimizing the transmitted power of each grid-connected system, and charging and discharging the corresponding grid-connected system based on the optimized transmitted power, achieving balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system, ensuring stable operation of the energy storage power station, and reducing costs.

[0099] In the above embodiment, the transmitted power is allocated according to the required power of the BMS of each grid-connected system. After the transmitted power of each grid-connected system is allocated, the transmitted power will not be transmitted to the PCS immediately. Instead, the operating parameter status of each grid-connected system is detected first to optimize and adjust the power, and the optimized transmitted power is sent to the PCS. The corresponding grid-connected system is charged and discharged through the PCS to achieve balanced power distribution and balanced battery use. It should be noted that the execution time for completing the power optimization allocation is stable within 200ms, achieving extreme response; by flexibly allocating power to each grid-connected system, the EMS can better manage and dispatch distributed energy (such as photovoltaics, energy storage and charging piles, etc.), and achieve optimal energy utilization and reduced energy costs.

[0100] In one embodiment, the operating parameter data also includes the current actual power; and after the step of detecting the operating parameter data of each grid-connected system, the following steps are included:

[0101] When the current actual power exceeds the second power threshold, the transmitted power corresponding to the current actual power exceeding the second power threshold is updated to 0.

[0102] For example, the power of the corresponding grid-connected system can be detected in real time through the BMS, and then the current actual power of the corresponding grid-connected system can be obtained.

[0103] By comparing the current actual power of each grid-connected system with the second power threshold, when the current actual power exceeds the second power threshold, it is determined that the current actual power of the corresponding grid-connected system exceeds the safety range, and then the corresponding power sent down corresponding to the current actual power exceeding the second power threshold is updated to 0, that is, no power is sent down to the grid-connected system whose current actual power exceeds the second power threshold, thereby further improving the safety and reliability of power allocation.

[0104] It should be understood that although Figures 2 to 6 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figures 2 to 6At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0105] In one embodiment, Figure 7 As shown, a power distribution device is provided, comprising:

[0106] The power acquisition unit 710 is used to acquire the total power of the energy storage system and the current required power of multiple grid-connected systems.

[0107] The power distribution unit 720 is used to obtain the power sent by each corresponding grid-connected system according to the total power and each current required power.

[0108] The power optimization unit 730 is used to detect the operation parameter data of each grid-connected system, and process each transmitted power according to each operation parameter data to obtain each optimized transmitted power.

[0109] The power sending unit 740 is used to charge and discharge the corresponding grid-connected system based on each optimized sent power.

[0110] For the specific definition of the power distribution device, please refer to the definition of the power distribution method above, which will not be repeated here. Each module in the above-mentioned power distribution device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the energy management system in the form of hardware, or can be stored in the memory in the energy management system in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0111] In one embodiment, Figure 8 As shown, there is also provided an energy storage power station, including an energy storage system 810 and multiple grid-connected systems 820. The energy storage system 810 is provided with an energy management system 812, and the energy management system 812 is respectively connected to each grid-connected system 820. The energy management system is used to execute the steps of any of the above-mentioned power allocation methods.

[0112] For example, the energy storage power station further includes an energy storage converter, which is connected between the energy storage system 810 and each grid-connected system 820. The energy storage system 810 can discharge to each grid-connected system 820 through the energy storage converter, and each grid-connected system 820 can also charge the energy storage system 810 through the energy storage converter. The grid-connected system 820 may include a battery management system (BMS), and the energy management system 812 is connected to the BMS of each grid-connected system 820, respectively.

[0113] The energy management system 812 obtains the total power of the energy storage system 810 and the current power demand of each grid-connected system 820; obtains the power sent down by each corresponding grid-connected system 820 according to the total power and each current power demand; detects the operating parameters of each grid-connected system 820 to obtain the operating parameter data of each corresponding grid-connected system 820; processes each sent down power according to each operating parameter data to obtain each optimized sent down power; based on each optimized sent down power, charges and discharges each grid-connected system 820 corresponding to the optimized sent down power, so as to realize balanced power distribution of each grid-connected system 820. The present application allocates the transmitted power according to the current power demand of each grid-connected system 820. After the transmitted power of each grid-connected system 820 is allocated, the operating parameter data of each grid-connected system 820 is detected to adjust the transmitted power, thereby optimizing the transmitted power, and then charging and discharging the corresponding grid-connected system 820 based on the optimized transmitted power, achieving balanced power distribution and balanced battery use, avoiding overcharging or over-discharging of batteries in the energy storage system 810, ensuring stable operation of the energy storage power station, and reducing costs.

[0114] In the above embodiment, by performing flexible power distribution on each grid-connected system 820, the charging and discharging state of the energy storage system 810 can be accurately adjusted according to the real-time detection data and prediction information to achieve optimal power distribution, thereby solving the problem of unbalanced power distribution in the traditional energy management system 812 and avoiding overcharging or over-discharging of the battery; solving the problem of unbalanced charging and discharging between battery clusters, making the battery use more balanced; being more flexible and reasonable in terms of power distribution, the charging and discharging of the battery clusters in a single energy storage system 810 can be independently controlled without interfering with each other; by flexibly allocating power, the energy storage system 810 can optimize the use and distribution of energy, store energy during low demand periods, and release energy during high demand periods, thereby avoiding energy waste and improving energy utilization efficiency; in addition, the energy storage system 810 can absorb excess energy during peak periods of the power grid, reduce the load on the power grid, and release the stored energy when needed to meet peak demand, which helps to reduce dependence on traditional power generation equipment and reduce the operating cost of the power grid.

[0115] In one embodiment, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above-mentioned power allocation methods are implemented.

[0116] For example, when the computer program is executed by a processor, the following steps of the power allocation method are implemented:

[0117] Obtain the total power of the energy storage system and the current power demand of each grid-connected system; obtain the power sent down by each corresponding grid-connected system based on the total power and each current power demand; detect the operating parameters of each grid-connected system to obtain the operating parameter data of each corresponding grid-connected system; process each sent down power based on each operating parameter data to obtain each optimized sent down power; based on each optimized sent down power, charge and discharge each grid-connected system corresponding to the optimized sent down power to achieve balanced power distribution for each grid-connected system.

[0118] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned division operation methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0119] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A power distribution method, characterized in that: The following steps are involved: Obtain the total power of the energy storage system and the current required power of multiple grid-connected systems; According to the total power and the current required power, the power sent down by each corresponding grid-connected system is obtained; Detecting the operating parameter data of each of the grid-connected systems, and processing each of the transmitted powers according to each of the operating parameter data to obtain each optimized transmitted power; Based on each optimized transmitted power, charging and discharging the corresponding grid-connected system; After the step of processing each of the transmission powers according to each of the operating parameter data to obtain each optimized transmission power, the following steps are included: When the transmitted power corresponding to the grid-connected system exceeds the first power threshold of the corresponding grid-connected system, updating the transmitted power corresponding to the grid-connected system to the first power threshold of the corresponding grid-connected system; The operating parameter data also includes the current actual power; the step of detecting the operating parameter data of each of the grid-connected systems includes: When the current actual power exceeds the second power threshold, the transmitted power corresponding to the current actual power exceeding the second power threshold is updated to 0.

2. The power distribution method according to claim 1, characterized in that: The step of obtaining the power sent down by each corresponding grid-connected system according to the total power and each current required power includes: According to each of the current power requirements, a total power requirement is obtained; Obtaining a power demand ratio of each of the grid-connected systems according to each of the current power demands and the total power demand; The step of obtaining the power sent down by each corresponding grid-connected system according to the total power and each current required power comprises: According to the total power and the ratio of each power demand, the power sent down by each corresponding grid-connected system is obtained.

3. The power distribution method according to claim 1, characterized in that: The operating parameter data includes temperature data; The step of processing each of the transmitted powers according to each of the operating parameter data to obtain each optimized transmitted power comprises: When the temperature data does not fall within the temperature threshold range, the corresponding transmitted power corresponding to the temperature data not falling within the temperature threshold range is updated to 0; When the temperature data falls within the temperature threshold range, the power sent corresponding to the temperature data falling within the temperature threshold range is maintained unchanged.

4. The power distribution method according to claim 3, characterized in that: The operating parameter data also includes voltage data; The step of processing each of the transmitted powers according to each of the operating parameter data to obtain each optimized transmitted power comprises: When the voltage data does not fall within the voltage threshold range, the transmitted power corresponding to the voltage data not falling within the voltage threshold range is updated to 0; When the voltage data falls within the voltage threshold range, the transmitted power corresponding to the voltage data falling within the voltage threshold range is maintained unchanged.

5. The power distribution method according to claim 4, characterized in that: The operating parameter data also includes SOC data; The step of processing each of the transmitted powers according to each of the operating parameter data to obtain each optimized transmitted power comprises: When the SOC data does not fall within the SOC threshold range, updating the sending power corresponding to the SOC data not falling within the SOC threshold range to 0; When the SOC data falls within the SOC threshold range, the sending power corresponding to the SOC data falling within the SOC threshold range is maintained unchanged.

6. The power allocation method according to any one of claims 3 to 5, characterized in that: After the step of processing each of the transmission powers according to each of the operating parameter data to obtain each optimized transmission power, the following steps are included: When the transmitted power corresponding to the grid-connected system does not exceed the first power threshold of the corresponding grid-connected system, the transmitted power corresponding to the grid-connected system is maintained unchanged.

7. A power distribution device, characterized in that: include: A power acquisition unit, used to acquire the total power of the energy storage system and the current required power of multiple grid-connected systems; A power distribution unit, configured to obtain the power delivered by each corresponding grid-connected system according to the total power and each currently required power; A power optimization unit, used for detecting the operation parameter data of each grid-connected system, and processing each transmitted power according to each operation parameter data to obtain each optimized transmitted power; A power sending unit, used for charging and discharging the corresponding grid-connected system based on each optimized sent power; The power optimization unit is further used for: when the transmitted power corresponding to the grid-connected system exceeds the first power threshold of the corresponding grid-connected system, updating the transmitted power corresponding to the grid-connected system to the first power threshold of the corresponding grid-connected system; The power optimization unit is also used for: the operating parameter data also includes the current actual power; when the current actual power exceeds the second power threshold, the downlink power corresponding to the current actual power exceeding the second power threshold is updated to 0.

8. An energy storage power station, characterized in that: It comprises an energy storage system and a plurality of grid-connected systems, wherein the energy storage system is provided with an energy management system, wherein the energy management system is respectively connected to each of the grid-connected systems, and wherein the energy management system is used to execute the steps of the power distribution method as claimed in any one of claims 1 to 6.

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 steps of the power allocation method according to any one of claims 1 to 6 are implemented.

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