New energy storage system, energy storage operation method and apparatus therefor, and computer device

Abstract

The present application relates to a new energy storage system, an energy storage operation method and apparatus therefor, a computer device, a storage medium, and a computer program product. A new energy power generation module, a power module and a battery module are integrated to build a new energy sub-module, and the power module and the new energy power generation module in the new energy sub-module are separately connected to a control apparatus, so as to build the modular new energy storage system.

Description

New energy storage system and energy storage operation method, device, and computer equipment Cross-references

[0001] This application refers to Chinese patent application No. 202311525009.X, filed on November 15, 2023, entitled “New Energy Energy Storage System and Its Energy Storage Operation Method, Device, and Computer Equipment,” which is incorporated into this application in its entirety by reference. Technical Field

[0002] The present application relates to the field of energy storage technology, and in particular to a new energy storage system and its energy storage operation method, device, computer equipment, storage medium and computer program product. Background Art

[0003] Energy storage provides frequency and peak regulation applications across all aspects of the power system, including generation, transmission, distribution, and consumption. This helps stabilize grid frequency, alleviate grid congestion, and increase the flexibility of power generation and consumption, significantly facilitating daily production and life. With the continuous development of energy storage technology and the advocacy of sustainable development, new energy storage systems, due to their green, pollution-free, low-carbon, environmentally friendly, and clean, renewable nature, have become a research hotspot and offer broad application prospects.

[0004] However, in related technologies, new energy storage systems rely on manual scheduling, resulting in low scheduling efficiency.

[0005] Based on this, it is necessary to provide a new energy storage system and its energy storage operation method, device, computer equipment, storage medium and computer program product to alleviate the problem of low scheduling efficiency of the new energy storage system.

[0006] The present application provides a new energy storage system, including a control device and a new energy sub-module. The new energy sub-module includes a power module, a battery module and a new energy power generation module. The battery module is connected to the power module and the new energy power generation module respectively. The power modules of adjacent new energy sub-modules are cascaded in sequence and connected to the power grid system. The power module and the new energy power generation module are respectively connected to the control device.

[0007] The aforementioned new energy storage system integrates a new energy generation module with a power module and a battery module to form a new energy submodule. The power module and new energy generation module within the new energy submodule are then connected to a control device, creating a modular new energy storage system. This allows the control device to automatically switch the new energy submodules in the new energy storage system on and off without manual intervention, effectively alleviating the low scheduling efficiency of the new energy storage system.

[0008] In some embodiments, the new energy submodule further includes a converter, the battery module is connected to the new energy power generation module via the converter, and the converter is connected to the control device.

[0009] In the above solution, a converter is further connected between the new energy power generation module and the battery module. The converter can convert the electric energy generated by the new energy power generation module into electric energy suitable for storage in the battery module, thereby improving the reliability of electric energy storage.

[0010] In some embodiments, the converter includes at least one of a DC converter and an AC-DC converter.

[0011] In the above scheme, the converter can be set as a DC converter and / or an AC / DC converter based on actual conditions, so that the AC or DC power generated by the new energy power generation module can be effectively converted and stored in the battery module, further improving the reliability of power storage.

[0012] In some embodiments, power modules of adjacent new energy sub-modules are cascaded in sequence and then connected to the power grid system.

[0013] In the above solution, the new energy storage system includes multiple new energy sub-modules, and each new energy sub-module is cascaded in sequence through a power module, and the cascaded architecture is connected to the power grid system. In this way, the new energy storage system supplies power to the power grid system, providing a guarantee for maintaining the long-term and stable operation of the power grid system.

[0014] In some embodiments, the new energy power generation module includes at least one of a photovoltaic power generation module, a wind power generation module, a tidal power generation module, and a biomass power generation module.

[0015] In the above scheme, the new energy power generation module in the new energy sub-module can adopt at least one of the photovoltaic power generation module, wind power generation module, tidal power generation module and biomass power generation module according to actual needs, effectively broadening the power acquisition method of the new energy energy storage system and improving the power generation reliability of the new energy energy storage system.

[0016] The present application also provides an energy storage operation method, including: determining the operating status of the power grid system based on the power demand parameters of the power grid system; and controlling the switching operation of the new energy sub-module based on the operating status, combining the battery available score and the sub-module available score of the new energy sub-module.

[0017] The above-mentioned energy storage operation method, when the new energy storage system is connected to the power grid system for operation, can determine the current operating state of the power grid system by combining the power demand parameters of the power grid system. Subsequently, the switching operation of each new energy submodule in the new energy storage system is controlled by combining the operating state of the power grid system, the battery availability score of the new energy submodule, and the submodule availability score. In this way, the switching operation of the new energy submodule of the new energy storage system can be automatically matched and controlled in combination with the operating state of the power grid system, without the need for manual operation, thus alleviating the problem of low scheduling efficiency of the new energy storage system.

[0018] In some embodiments, the operating state includes power absorption operation. According to the operating state, the battery available score of the new energy sub-module and the sub-module available score are combined to control the switching operation of the new energy sub-module, including: when the power grid system is in power absorption operation, the output state parameters of the new energy power generation module of the new energy sub-module are obtained; according to the power demand parameters and the output state parameters, the battery available score of the new energy sub-module and the sub-module available score are combined to control the switching operation of the new energy sub-module.

[0019] The above scheme, when the power grid system is in power absorption operation, can combine the output state parameters of the new energy power generation module of the new energy storage system and the power demand parameters of the power grid system to control the switching of the new energy sub-module, so that the switching of the new energy sub-module is more closely matched with the operation of the new energy storage system, and the switching reliability of the new energy sub-module is improved when the power absorption operation is in progress.

[0020] In some embodiments, the switching operation of the new energy sub-module is controlled based on the power demand parameter and the output state parameter, combined with the battery available score and the sub-module available score of the new energy sub-module, including: when the power demand parameter and the output state parameter are not equal, the switching operation of the current new energy sub-module is controlled based on the battery available score and the sub-module available score corresponding to the current new energy sub-module of the new energy energy storage system.

[0021] In the above scheme, when the switching of the new energy sub-module is controlled according to the power demand parameter and the output state parameter, if the power demand parameter and the output state parameter are not equal, it is necessary to further combine the battery available score and the sub-module available score of the current new energy sub-module to control the switching of the current new energy sub-module, so as to improve the switching control accuracy of the current new energy sub-module.

[0022] In some embodiments, the operating state includes power generation operation. According to the operating state, the battery available score and submodule available score of the new energy submodule are combined to control the switching operation of the new energy submodule, including: when the power grid system is in power generation operation, the battery available score and submodule available score corresponding to the current new energy submodule of the new energy energy storage system are used to control the switching operation of the current new energy submodule.

[0023] The above scheme, when the power grid system is in power generation operation, can control the switching of the current new energy sub-module based on the battery available score and sub-module available score corresponding to the current new energy sub-module, thereby improving the switching accuracy of the new energy sub-module when the power grid system is in power generation operation.

[0024] In some embodiments, the current new energy submodule is controlled to be switched on and off according to the battery available score and the submodule available score corresponding to the current new energy submodule of the new energy storage system, including: obtaining the submodule available score corresponding to the current new energy submodule of the new energy storage system; when the submodule available score is zero, reducing the number of available submodules of the new energy storage system by one; when the number of available submodules is greater than the required number of inputs, controlling the current new energy submodule to be switched off and run; obtaining the battery available score corresponding to the current new energy submodule of the new energy storage system; when the battery available score is not zero, controlling the new energy power generation module of the current new energy submodule to charge the battery module of the current new energy submodule; when the battery available score is zero, controlling the new energy power generation module to abandon power operation.

[0025] The above solution can determine the number of available submodules based on the available submodule score of the current new energy submodule, control the switching of the current new energy submodule based on the available submodule score and the required number of submodules, and control the operation of the new energy power generation module based on the battery available score of the current new energy submodule. When the current new energy submodule is switched out of operation, the new energy power generation module of the new energy submodule can be used to charge the battery module, ensuring that the new energy power generation module is kept operational as much as possible.

[0026] In some embodiments, after obtaining the submodule available score corresponding to the current new energy submodule of the new energy storage system, it also includes: when the submodule available score is not zero, maintaining the number of available submodules of the new energy storage system unchanged; when the number of available submodules is greater than the required number of inputs, controlling the current new energy submodule to be put into operation.

[0027] The above scheme maintains the number of available sub-modules unchanged and controls the input of the current new energy sub-module when the sub-module available score of the current new energy sub-module is not zero, so that the output of the new energy power generation module is always in the maximum power tracking state, thereby improving the utilization rate of the new energy power generation module.

[0028] In some embodiments, when the operating state includes absorbing power operation and the power demand parameter is less than the output state parameter, when the submodule available score is zero, after reducing the number of available submodules of the new energy storage system by one, or when the submodule available score is not zero, maintaining the number of available submodules of the new energy storage system unchanged, it also includes: when the number of available submodules is less than or equal to the required input quantity, outputting a power increase operation request; when receiving a determination instruction returned based on the power increase operation request, returning to the step of determining the operating state of the power grid system based on the power demand parameter of the power grid system.

[0029] In the above scheme, when the grid system is absorbing power and the power demand parameter is less than the output state parameter, if the number of available submodules is less than or equal to the required number, this means that even if the new energy submodules are currently operational, the output of the new energy generation module will be excessive. In this case, a power increase request will be issued to increase the power of the grid system, consuming the power output of the new energy generation module and improving energy utilization.

[0030] In some embodiments, when the number of available sub-modules is less than or equal to the required number of inputs, after outputting a power increase operation request, it also includes: when no confirmation instruction returned based on the power increase operation request is received, controlling the new energy power generation module of the new energy sub-module to reduce the load operation until the output state parameter is less than or equal to the power demand parameter.

[0031] In the above scheme, if the power grid system does not agree after the output power increase operation request is received, the new energy power generation module used to generate electricity in the new energy sub-module will be controlled to operate at a reduced load, thereby reducing the output power of the new energy power generation module and improving the operation safety of the new energy energy storage system.

[0032] In some embodiments, when the operating state includes absorbing power operation and the power demand parameter is greater than the output state parameter, when the sub-module available score is zero, after reducing the number of available sub-modules of the new energy storage system by one, or when the sub-module available score is not zero, maintaining the number of available sub-modules of the new energy storage system unchanged, it also includes: when the number of available sub-modules is less than or equal to the required input quantity, outputting a power reduction operation request; when receiving a determination instruction returned based on the power reduction operation request, returning to the step of determining the operating state of the power grid system based on the power demand parameter of the power grid system.

[0033] In the above scheme, when the power grid system is absorbing power and the power demand parameter is greater than the output state parameter, if the number of available submodules is less than or equal to the required number, it means that even if the new energy submodules are currently in operation, the output of the new energy generation module cannot meet the demand. In this case, a power reduction operation request will be issued to reduce the power of the power grid system, reduce the consumption of the output power of the new energy generation module, and improve the operational reliability of the new energy storage system.

[0034] In some embodiments, when the number of available sub-modules is less than or equal to the required number of inputs, after outputting a power reduction operation request, it also includes: controlling the new energy storage system to lock when no confirmation instruction returned according to the power reduction operation request is received; obtaining the battery available score corresponding to the current new energy sub-module; when the battery available score is not zero, controlling the new energy power generation module of the current new energy sub-module to charge the battery module of the current new energy sub-module; when the battery available score is zero, controlling the new energy power generation module to abandon power operation.

[0035] In this solution, if the grid disagrees with a power reduction request, the new energy storage system is shut down, improving operational safety. By further analyzing the available battery capacity of the new energy submodule, the new energy generation module is used to charge the battery module of the new energy submodule, maximizing the possibility of maintaining the new energy generation module's energy consumption.

[0036] In some embodiments, the switching operation of the new energy sub-module is controlled based on the power demand parameter and the output state parameter, combined with the battery available score and the sub-module available score of the new energy sub-module, and also includes: when the power demand parameter is equal to the output state parameter, controlling the current new energy sub-module to be put into operation.

[0037] In the above scheme, when the power demand parameter is equal to the output state parameter, the current new energy submodule is directly controlled to be put into operation, and the new energy power generation module is used to provide power to the power grid system, thereby improving the utilization rate of the new energy power generation module.

[0038] In some embodiments, when the operating state includes power generation operation, when the sub-module available score is zero, after reducing the number of available sub-modules of the new energy storage system by one, or when the sub-module available score is not zero, maintaining the number of available sub-modules of the new energy storage system unchanged, it also includes: when the number of available sub-modules is less than or equal to the required input quantity, outputting a control strategy change request; when receiving a confirmation instruction based on the control strategy change request feedback, returning to the step of obtaining the output state parameters of the new energy power generation module of the new energy sub-module.

[0039] In the above scheme, when operating under power output, if it is detected that the number of available sub-modules is less than or equal to the required number of sub-modules, the control strategy will be changed. According to the received confirmation instruction, the execution is returned to obtain the output state parameters of the new energy power generation module of the new energy storage system connected to the power grid system. That is, the switching control is carried out according to the control strategy under the power absorption operation, thereby improving the operational reliability of the new energy storage system.

[0040] In some embodiments, when the number of available sub-modules is less than or equal to the required number of inputs, after outputting a control strategy change request, it also includes: controlling the new energy storage system to lock when no confirmation instruction based on the control strategy change request feedback is received; obtaining the battery available score corresponding to the current new energy sub-module; when the battery available score is not zero, controlling the new energy power generation module of the current new energy sub-module to charge the battery module of the current new energy sub-module; when the battery available score is zero, controlling the new energy power generation module to abandon power operation.

[0041] In this solution, if the output control strategy change request is not approved, the new energy storage system is locked, improving the operational safety of the new energy storage system. By further analyzing the current available battery value of the new energy submodule, the new energy power generation module is used to charge the battery module of the new energy submodule, maximizing the possibility of the new energy power generation module operating without wasting energy.

[0042] In some embodiments, the method for determining the battery usable score includes: performing a weighted analysis based on at least one of the battery state of charge, battery power capability parameter, and battery health status of the current new energy sub-module to determine the battery usable score.

[0043] The above solution combines at least one of the battery state of charge, battery power capability parameters and battery health status for weighted calculation to obtain the battery usable score, so that the battery usable score matches the current new energy sub-module, thereby improving the accuracy of the battery usable score.

[0044] In some embodiments, the method for determining the available score of the sub-module includes: determining the charging and discharging battery demand parameters based on the power demand parameters and the output state parameters; performing a weighted analysis based on the charging and discharging battery demand parameters, the output performance parameters of the new energy power generation module in the current new energy sub-module, the battery charge state of the current new energy sub-module, the battery power capability parameters, the battery charging and discharging current and the battery health status to determine the available score of the sub-module.

[0045] The above scheme combines at least one of the charge and discharge battery demand parameters, the output performance parameters of the new energy power generation module, the battery state of charge, the battery power capability parameters, the battery charge and discharge current, and the battery health status for weighted calculation to obtain the submodule available score, so that the submodule available score is more closely matched with the new energy storage system, thereby improving the accuracy of the submodule available score.

[0046] The present application also provides an energy storage operation device, including: an operation determination module, which is used to determine the operating status of the power grid system based on the power demand parameters of the power grid system; a switching control module, which is used to control the switching operation of the new energy sub-module based on the operating status, combined with the battery available score and the sub-module available score of the new energy sub-module.

[0047] The present application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned energy storage operation method when executing the computer program.

[0048] The present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above-mentioned energy storage operation method when the computer program is executed by a processor.

[0049] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned energy storage operation method when executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the drawings without inventive work. In the drawings:

[0051] FIG1 is a schematic diagram of the structure of a new energy storage system in some embodiments of the present application;

[0052] FIG2 is a schematic diagram of the structure of a new energy storage system in some other embodiments of the present application;

[0053] FIG3 is a schematic flow chart of an energy storage operation method in some embodiments of the present application;

[0054] FIG4 is a schematic flow chart of an energy storage operation method in some other embodiments of the present application;

[0055] FIG5 is a schematic flow chart of an energy storage operation method in some other embodiments of the present application;

[0056] FIG6 is a flow chart of an energy storage operation method in some further embodiments of the present application;

[0057] FIG7 is a schematic diagram of a switching control flow in some embodiments of the present application;

[0058] FIG8 is a schematic diagram of a switching control flow in some other embodiments of the present application;

[0059] FIG9 is a schematic diagram of the switching control flow in some other embodiments of the present application;

[0060] FIG10 is a schematic diagram of a switching control flow in the power absorption state in some embodiments of the present application;

[0061] FIG11 is a schematic diagram of a switching control flow in some further embodiments of the present application;

[0062] FIG12 is a schematic diagram of a switching control flow in the power absorption state in some other embodiments of the present application;

[0063] FIG13 is a schematic diagram of a switching control flow in some other embodiments of the present application;

[0064] FIG14 is a schematic diagram of the switching control flow in some other embodiments of the present application;

[0065] FIG15 is a schematic diagram of a switching control flow in a power-generating state in some embodiments of the present application;

[0066] FIG16 is a schematic diagram of a process for determining an operating state in some embodiments of the present application;

[0067] FIG17 is a schematic diagram of the structure of an energy storage operation device in some embodiments of the present application;

[0068] FIG18 is a schematic diagram of the internal structure of a computer device in some embodiments of the present application. DETAILED DESCRIPTION

[0069] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0071] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0072] Currently, market developments indicate that energy storage systems are increasingly being used, significantly facilitating electricity consumption in daily production and life. Among various energy storage technologies, high-voltage direct-mounted energy storage is gaining popularity and application due to its highly modular structure, which meets the requirements for high efficiency, reliability, economy, and safety.

[0073] High-voltage, direct-mount energy storage systems integrate voltage-source converter valves (VSCs) and energy storage valves. Specifically, the energy storage valve is connected between the VSCs at both ends of the grid, with each end connected to the grid busbar, allowing it to operate in the grid system. When this type of high-voltage, direct-mount energy storage system is connected to the grid, a new energy generation module is often connected to the energy storage valve to form a new energy storage system. This new energy storage system generates electricity from the new energy generation module to charge the battery module of the energy storage valve, effectively improving energy utilization.

[0074] Energy storage valves typically consist of multiple cascaded energy storage valve submodules. When a new energy storage system is connected to a power grid and operated, it's often necessary to adjust the activation and deactivation of these submodules based on the grid's actual needs. In related technologies, the activation and deactivation of each submodule often requires manual scheduling. This scheduling method is not only inefficient but also prone to errors, making it difficult to ensure scheduling precision and accuracy.

[0075] To alleviate these issues, research has found that the new energy generation module can be integrated with the energy storage valve. Specifically, the new energy generation module is distributed within each energy storage valve submodule to form a new energy submodule. These submodules are then connected to a control device, creating a modular new energy storage system. The control device automatically controls the switching on and off of each new energy submodule, changing the access status of the new energy generation module, thereby controlling the operation of the new energy storage system.

[0076] Based on the above considerations, the present application provides a new energy storage system that integrates a new energy generation module with a power module and a battery module to form a new energy sub-module. The power modules of adjacent new energy sub-modules are cascaded in sequence and connected to the power grid system. The power modules and new energy generation modules in the new energy sub-modules are respectively connected to a control device to form a modular new energy storage system.

[0077] Through the above method, the switching operation of the new energy sub-modules in the new energy storage system can be automatically realized under the control of the control device without manual operation, effectively alleviating the problem of low scheduling efficiency of the new energy storage system.

[0078] The specific application scenarios of the new energy storage system of this application are not limited. It can be a high-voltage direct-mounted energy storage scenario, a medium- and high-voltage AC cascade energy storage scenario, an MMC (Modular Multilevel Converter) AC energy storage scenario, or a low-voltage energy storage scenario, etc., without specific limitation. To facilitate understanding of the technical solution of this application, the following can be understood as the application of the new energy storage system in a high-voltage direct-mounted energy storage scenario.

[0079] Please refer to Figure 1. The present application provides a new energy storage system, including a control device (not shown) and a new energy sub-module 102. The new energy sub-module 102 includes a power module 11, a battery module 12 and a new energy power generation module 13. The battery module 12 is respectively connected to the power module 11 and the new energy power generation module 13, and the power module 11 and the new energy power generation module 13 are respectively connected to the control device.

[0080] The power module 11 is a device for realizing power conversion; the battery module 12 is a device for storing and releasing electric energy; the new energy power generation module 13 is a device capable of generating electricity through new energy technology. The new energy power generation module 13 can charge the battery module 12 of the new energy sub-module 102, and can also directly output electric energy to the power grid system to supply power to the power grid system. The power module 11 can adopt a half-bridge power module or a full-bridge power module according to actual needs, without specific limitation. FIG1 illustrates a half-bridge structure power module. The battery module 12 can be a battery, or a battery pack formed by connecting multiple batteries in series and / or in parallel, without specific limitation.

[0081] The control device may control the switching of the new energy sub-modules 102 in various ways. In some embodiments, the control device may determine the current operating state of the power grid system based on the power demand parameters of the power grid system when the new energy storage system is connected to the power grid system. The control device may then determine a control strategy based on the operating state of the power grid system to control the switching of each new energy sub-module 102 in the new energy storage system.

[0082] The aforementioned new energy storage system integrates the new energy generation module 13 with the power module 11 and the battery module 12 to form a new energy sub-module 102. The power module 11 and the new energy generation module 13 within the new energy sub-module 102 are then connected to a control device, thereby forming a modular new energy storage system. This allows the new energy sub-module 102 to be automatically switched on and off under the control of the control device, eliminating the need for manual operation and effectively alleviating the low scheduling efficiency of the new energy storage system.

[0083] Please refer to FIG. 2 . In some embodiments, the new energy submodule 102 further includes a converter 14 . The battery module 12 is connected to the new energy power generation module 13 via the converter 14 . The converter 14 is connected to a control device (not shown).

[0084] The converter 14 is a device that converts AC voltage or DC voltage to obtain a DC voltage of appropriate size and outputs it. During the operation of the new energy storage system, the electric energy generated by the new energy power generation module 13 in the new energy sub-module 102 can not only be transmitted to the power grid system to power the load, but also be transmitted to the battery module 12 for storage. Taking into account the poor stability of the electric energy generated by the new energy power generation module 13, in order to achieve reliable storage of electric energy and improve the operating safety of the battery module 12, a converter 14 can also be set between the battery module 12 and the new energy power generation module 13. The converter 14 converts the electric energy generated by the new energy power generation module 13 into electric energy suitable for the battery module 12 for transmission. Through the setting of the converter 14, maximum power tracking can also be achieved in the new energy storage system, so that the new energy power generation module 13 is in a maximum power point tracking state.

[0085] In the above solution, a converter 14 is further connected between the new energy power generation module 13 and the battery module 12. The converter 14 can convert the electric energy generated by the new energy power generation module 13 into electric energy suitable for the battery module 12 for storage, thereby improving the reliability of electric energy storage.

[0086] In some embodiments, the converter 14 includes at least one of a DC converter and an AC-DC converter.

[0087] A DC converter, also known as a DC / DC (Direct Current / Direct Current) converter, is a device that converts DC power to DC power of varying voltages. An AC / DC converter, also known as an AC / DC (Alternating Current / Direct Current), is a device that converts AC power to DC power. In this embodiment, within the same new energy submodule 102, only one DC converter, one AC converter, or both AC and DC converters can be provided. The choice is made based on actual needs.

[0088] It should be pointed out that the specific type of DC converter is not limited to a non-isolated DC / DC converter, a boost circuit (BOOST circuit), a buck circuit (BUCK circuit) or an isolated converter, a phase-shifted full-bridge converter, etc.

[0089] In the above scheme, the converter 14 can be set as a DC converter and / or an AC / DC converter based on actual conditions, so that the AC or DC power generated by the new energy power generation module 13 can be effectively converted and stored in the battery module 12, further improving the reliability of power storage.

[0090] In some embodiments, the power modules 11 of adjacent new energy sub-modules 102 are cascaded in sequence and then connected to the power grid system.

[0091] The number of new energy submodules 105 is not unique. In order to meet the system scheduling requirements, the solution of this embodiment is to set two or more new energy submodules 102 in the new energy energy storage system, and each new energy submodule 102 is cascaded in sequence. Specifically, the cascade between the new energy submodules 102 is realized through the power module 11. Please refer to Figure 1 or Figure 2. In the power module 11 of each new energy submodule 102, the two AC ends of the power module 11 (that is, the end of the power module 11 away from the energy storage module 12) are respectively connected to an AC end of the power module 11 of an adjacent new energy submodule 102, thereby completing the cascade of the new energy submodule 102. Finally, the two ends of the architecture (that is, the energy storage valve) after the cascade of each new energy submodule 102 are connected to the AC power grid.

[0092] It is understood that in some embodiments, the new energy storage system may further include an inverter 106, with both ends of the cascaded new energy sub-modules 102 connected to the inverter 106 and the power grid. The modular design of each new energy sub-module 102 allows for different numbers of new energy sub-modules 102 to be deployed in practical scenarios based on operational requirements.

[0093] In the above solution, the new energy storage system includes multiple new energy sub-modules 102, and each new energy sub-module 102 is cascaded in sequence through the power module 11, and the cascaded architecture is connected to the power grid system. In this way, the new energy storage system supplies power to the power grid system, providing a guarantee for maintaining long-term and stable operation of the power grid system.

[0094] In some embodiments, the new energy power generation module 13 includes at least one of a photovoltaic power generation module, a wind power generation module, a tidal power generation module, and a biomass power generation module.

[0095] The type of the new energy power generation module 13 is not unique, and can be any one or more of a photovoltaic power generation module, a wind power generation module, a tidal power generation module, and a biomass power generation module. Moreover, in the same new energy sub-module 102, one or more new energy power generation modules 13 can be set at the same time, and the types of each new energy power generation module 13 can be the same or different, and there is no specific limitation. For ease of understanding, the following embodiments can all be understood as setting a new energy power generation module 13 inside a new energy sub-module 102, and the new energy power generation modules 13 in each new energy sub-module 102 can be set to be the same or different, and can be selected based on actual needs.

[0096] In the above solution, the new energy power generation module 13 in the new energy sub-module 102 can adopt at least one of the photovoltaic power generation module, wind power generation module, tidal power generation module and biomass power generation module according to actual needs, effectively broadening the power acquisition method of the new energy energy storage system and improving the power generation reliability of the new energy energy storage system.

[0097] In some embodiments, the new energy generation module 13 includes a photovoltaic power generation module and a wind power generation module, and the new energy sub-module 102 is connected to the photovoltaic power generation module and the wind power generation module as an example for explanation. In order to enable the electric energy transmitted from the photovoltaic power generation module to the new energy sub-module 102 to be received and utilized by the battery module 12 of the new energy sub-module 102, a direct current converter (DC / DC) can be set between the photovoltaic power generation module and the battery module 12; in order to enable the electric energy transmitted from the wind power generation module to the new energy sub-module 102 to be received and utilized by the battery module 12 of the new energy sub-module 102, an alternating current to direct current converter (AC / DC) can be set between the wind power generation module and the battery module 12. Through the setting of DC / DC and AC / DC, the output of the photovoltaic power generation module can be controlled by MPPT (Maximum Power Point Tracking), thereby improving the utilization rate of the photovoltaic power generation module; or the output of the wind power generation module can be controlled by MPPT, thereby improving the utilization rate of the wind power generation module.

[0098] Please refer to FIG. 3 . The present application provides an energy storage operation method based on the above-mentioned new energy storage system, including step 202 and step 206 .

[0099] Step 202: Determine the operating state of the power grid system according to the power demand parameters of the power grid system.

[0100] A power grid is a network of various loads and power sources used to consume and / or store electricity. Power demand parameters are the parameters that the loads or power sources in a grid system must meet to operate when there is a demand for electricity (power demand).

[0101] The operating state refers to the state in which the power grid system is emitting or absorbing power, including absorbing power operation and emitting power operation. Absorbing power operation refers to the state in which the power grid system receives the output voltage and current of the new energy storage system and provides electrical energy to the load. Emitting power refers to the state in which the power grid system outputs voltage and current to the new energy storage system to charge the new energy storage system. The operation of the new energy storage system differs between the two different states of power grid emitting power operation and power absorbing power operation. Therefore, the solution of this embodiment must first determine the operating state of the power grid system in combination with the power demand parameters.

[0102] It should be noted that there is not only one way to obtain the power demand parameters. In some embodiments, the control device of the new energy storage system may communicate with the power grid system. The power grid system analyzes and calculates the connected loads, obtains the power demand parameters, and then sends them to the control device.

[0103] It can be understood that the specific type of power demand parameter is not unique, as long as it can reasonably characterize the state parameters required by the power grid system. For example, in some embodiments, the power demand parameter includes at least one of a power parameter and a current parameter. The power parameter is the power value corresponding to the power demand required to be provided when the power grid system is dispatched, which can be obtained by collecting the rated power of each electrical load in the power grid system. The current parameter is the current value corresponding to the power demand required to be provided when the power grid system is dispatched. Since the various electrical loads in the power grid system are generally operated in parallel (so the current parameter can be used to adjust the power demand), the voltage is consistent (for example, all are mains voltage), and the current parameter can be calculated based on the power parameter and voltage, without the need to set up an additional detector, which effectively saves costs. In other embodiments, in order to improve the accuracy of the current parameter, a current detector can also be set in the power grid system to collect the current parameter, which is not specifically limited.

[0104] Step 206 : Controlling the switching of the new energy submodule according to the operating status and combining the battery availability score of the new energy submodule and the submodule availability score.

[0105] The new energy storage system is an energy storage system that is connected to new energy power generation related devices. The current new energy submodule is the new energy submodule that currently needs to be switched on and off. The battery availability score is also the battery capacity score of the current new energy submodule, which is used to indicate whether the battery module of the current new energy submodule is available. It can be expressed as This can be understood as a normalized parameter for the battery capacity of the jth new energy submodule. This parameter is derived by evaluating the battery performance of the new energy submodule's battery module during charge and discharge. A non-zero battery availability score indicates that the new energy submodule's battery module is available and can be charged and discharged. A zero battery availability score indicates that the new energy submodule's battery module is unavailable and cannot be charged or discharged.

[0106] The available score of the submodule is the capacity score of the current new energy submodule, which is used to indicate whether the current new energy submodule is available. It can be expressed as This can be understood as a normalized parameter representing the comprehensive capabilities of the jth new energy submodule (including the battery module and power module). This parameter is derived by evaluating the output capacity of the new energy power generation module and the comprehensive battery performance of the battery module. A non-zero submodule availability score indicates that the current new energy submodule is available and can be connected to the new energy storage system for operation. A zero submodule availability score indicates that the current new energy submodule is unavailable and cannot be connected to the new energy storage system for operation.

[0107] In some embodiments, if the available score of the submodule only considers the battery module part and ignores the impact of the new energy power generation module, The equivalent value is

[0108] After the control device of the new energy storage system obtains the operating status of the power grid system, it will configure a control strategy for the new energy storage system based on the current operating status, and control it based on the battery available score and sub-module available score of the new energy sub-module, so that the new energy sub-module of the new energy storage system can be switched according to the control strategy, realizing automatic switching control of the new energy sub-module.

[0109] The above-described energy storage operation method, when a new energy storage system is connected to a power grid, can determine the current operating state of the power grid system based on the power demand parameters of the power grid system. Subsequently, based on the operating state of the power grid system, a control strategy is determined to control the switching operation of each new energy submodule in the new energy storage system. This method allows the switching operation of the new energy submodules of the new energy storage system to be automatically matched and controlled based on the operating state of the power grid system, without the need for manual operation, thus alleviating the low scheduling efficiency of the new energy storage system.

[0110] Referring to FIG. 4 , in some embodiments, the operating state includes power absorption operation, and step 206 includes step 302 and step 304 .

[0111] Step 302 : When the power grid system is in the state of absorbing power, the output state parameters of the new energy power generation module of the new energy sub-module are obtained.

[0112] Step 304 : Controlling the switching operation of the new energy submodule according to the power demand parameter and the output state parameter, combined with the battery availability score and the submodule availability score of the new energy submodule.

[0113] Output state parameters are parameters related to the operating state of the new energy power generation module when it outputs electricity to the battery module of the new energy sub-module and / or the power grid system. It should be noted that the specific type of output state parameter is not unique; any type that can reasonably characterize the output operating state of the new energy power generation module is acceptable. For example, in some embodiments, the output state parameter includes output current or output power, and the specific type can be selected based on actual needs.

[0114] It can be understood that in some embodiments, the output state parameter and the power requirement parameter should be of the same type, that is, if the output state parameter used is output power, the corresponding power requirement parameter should also be a power parameter.

[0115] The control device's method for determining the operating status of the power grid system based on the power demand parameter is not unique; the determination method may vary depending on the power demand parameter. For example, if the power demand parameter is a power parameter, the power grid system may be considered to be absorbing power if the power parameter is greater than zero. If the power demand parameter is a current parameter, the power grid system may be considered to be absorbing power if the current parameter is greater than zero.

[0116] The solution of this embodiment is explained by taking the power grid system in power absorption operation as an example. In this state, the specific matching control strategy is: the control device needs to first obtain the output state parameters of the new energy power generation module of the new energy energy storage system, and then use the output state parameters and power demand parameters to realize the control of the switching operation of the new energy sub-module.

[0117] The above scheme, when the power grid system is in power absorption operation, can combine the output state parameters of the new energy power generation module of the new energy storage system and the power demand parameters of the power grid system to control the switching of the new energy sub-module, so that the switching of the new energy sub-module is more closely matched with the operation of the new energy storage system, and the switching reliability of the new energy sub-module is improved when the power absorption operation is in progress.

[0118] Referring to FIG. 5 , in some embodiments, step 304 includes step 402 .

[0119] Step 402 : When the power demand parameter and the output state parameter are not equal, the current new energy submodule of the new energy storage system is controlled to be switched on and off according to the battery available score and the submodule available score corresponding to the current new energy submodule.

[0120] In the solution of the embodiment of the present application, for each new energy sub-module, it is necessary to adopt the energy storage operation method to perform switching control. Whenever the switching control of a new energy sub-module is completed, the control device returns to the operation of determining the operating status of the power grid system according to the power demand parameters of the power grid system, repeats the energy storage operation method, and performs switching control on the next new energy sub-module. The specific switching control needs to be judged in combination with the battery available score of the current new energy sub-module and the size of the sub-module available score. Under different battery available scores and / or sub-module available scores, the control strategy of the control device will also be different. Ultimately, through this switching control method, the output of the new energy power generation module can be kept in the maximum power point tracking state, alleviating the energy abandonment phenomenon of the new energy storage system.

[0121] In the above scheme, when the switching of the new energy sub-module is controlled according to the power demand parameter and the output state parameter, if the power demand parameter and the output state parameter are not equal, it is necessary to further combine the battery available score and the sub-module available score of the current new energy sub-module to control the switching of the current new energy sub-module, so as to improve the switching control accuracy of the current new energy sub-module.

[0122] Referring to FIG. 6 , in some embodiments, the operating state includes power generation operation, and step 206 includes step 502 .

[0123] Step 502 : When the power grid system is in power generation operation, the current new energy submodule of the new energy storage system is controlled to be switched on and off according to the battery availability score and submodule availability score corresponding to the current new energy submodule.

[0124] The control device's method for determining the operating status of the power grid system based on the power demand parameter is not unique; the determination method may vary depending on the power demand parameter. For example, if the power demand parameter is a power parameter, the power grid system is considered to be operating at power if the power parameter is determined to be less than or equal to zero. If the power demand parameter is a current parameter, the power grid system is considered to be operating at power if the current parameter is determined to be less than or equal to zero.

[0125] The solution of this embodiment is explained by taking the power grid system in power generation operation as an example. In this state, for each new energy sub-module, the specific matching control strategy is: according to the battery available score and sub-module available score of the current new energy sub-module, the current new energy sub-module is controlled to be switched on and off.

[0126] The above scheme, when the power grid system is in power generation operation, can control the switching of the current new energy sub-module based on the battery available score and sub-module available score corresponding to the current new energy sub-module, thereby improving the switching accuracy of the new energy sub-module when the power grid system is in power generation operation.

[0127] Regardless of whether it is operating in power generation or power absorption mode, the control device controls the switching of the current new energy submodule in a similar manner based on the submodule available score and the battery available score. Please refer to Figure 7. In some embodiments, the switching operation of the current new energy submodule is controlled based on the battery available score and the submodule available score corresponding to the current new energy submodule of the new energy energy storage system, including steps 601, 602, 603, 604, 605 and 606.

[0128] Step 601: Obtain the submodule available score corresponding to the current new energy submodule of the new energy storage system.

[0129] Step 602: When the submodule availability score is zero, reduce the number of available submodules of the new energy storage system by one.

[0130] Step 603 : When the number of available sub-modules is greater than the required number of sub-modules, the current new energy sub-module is controlled to be switched out for operation.

[0131] Step 604: Obtain the battery availability score corresponding to the current new energy sub-module of the new energy storage system.

[0132] Step 605 : When the battery available score is not zero, control the new energy power generation module of the current new energy sub-module to charge the battery module of the current new energy sub-module.

[0133] Step 606: When the battery available score is zero, the new energy power generation module is controlled to operate without power.

[0134] The number of available submodules refers to the number of new energy submodules that can be put into operation in the new energy storage system. Switching out of operation controls the current new energy submodule to exit the new energy storage system. This can be achieved by controlling the on / off switching devices (such as IGBTs, insulated gate bipolar transistors) of the power module in the current new energy submodule. For ease of understanding, taking the current new energy submodule with a half-bridge power module as an example, when in operation, only the upper transistor of the power module is turned on, and the lower transistor is turned off; while when switched out of operation, only the lower transistor of the power module is turned on, and the upper transistor is turned off.

[0135] The required number of inputs is the number of new energy submodules required to operate the grid system in its current state. This number can be calculated based on the grid system's voltage requirements and is not limited to a specific number. Curtailed operation refers to the forced abandonment of renewable energy generation due to some constraints, resulting in the shutdown of the corresponding generator set or a reduction in its power generation. This can include wind or solar curtailment, and varies depending on the type of renewable energy generation module.

[0136] The control device assumes that all new energy sub-modules can be put into operation by default. In actual scenarios, each new energy sub-module needs to be analyzed in turn. Whenever it is determined that a new energy sub-module cannot be put into operation, the number of available sub-modules will be reduced by one. If it is determined that the current new energy sub-module can be put into operation, there is no need to adjust the number of available sub-modules.

[0137] The control method of this embodiment is applicable to the power grid system's power emission operation and power absorption operation. In the specific control strategy, the sub-module available score is first obtained. When the sub-module available score is zero, it means that the current new energy sub-module is unavailable, and the new energy sub-module needs to be cut out of the new energy system for operation. In some embodiments, in order to reduce the situation of energy abandonment operation of the new energy energy storage system, the control device will obtain the battery available score of the current new energy sub-module and determine whether the battery module of the current new energy sub-module is available. If the battery module is available, the new energy power generation module is controlled to output electrical energy to charge the current new energy sub-module (the battery module inside it); if the battery module is unavailable (including the situation where the battery module is fully charged), the energy abandonment operation control of the new energy power generation module is executed.

[0138] The above solution can determine the number of available submodules based on the available submodule score of the current new energy submodule, control the switching of the current new energy submodule based on the available submodule score and the required number of submodules, and control the operation of the new energy power generation module based on the available battery score of the current new energy submodule. When the current new energy submodule is switched out of operation, the new energy power generation module of the new energy submodule can be used to charge the battery module of the new energy submodule, thereby maximizing the possibility of the new energy power generation module not being abandoned.

[0139] Please refer to FIG. 8 . In some embodiments, after step 601 , the method further includes steps 702 and 704 .

[0140] Step 702: When the submodule availability score is not zero, the number of available submodules of the new energy storage system is maintained unchanged.

[0141] Step 704 : When the number of available sub-modules is greater than the required number, control the current new energy sub-module to be put into operation.

[0142] Commissioning means connecting the new energy submodule to the new energy storage system for operation. If the control device analyzes the submodule's availability score and finds it non-zero, it indicates that the current new energy submodule is ready for operation in the new energy storage system. If the number of available submodules exceeds the required number, the current new energy submodule is directly commissioned into the new energy storage system, terminating energy storage operation control.

[0143] The above scheme maintains the number of available sub-modules unchanged and controls the input of the current new energy sub-module when the sub-module available score of the current new energy sub-module is not zero, so that the output of the new energy power generation module is always in the maximum power tracking state, thereby improving the utilization rate of the new energy power generation module.

[0144] Please refer to FIG. 9 . In some embodiments, when the operating state includes power absorption operation and the power demand parameter is less than the output state parameter, after step 602 or step 702 , the method further includes step 802 .

[0145] Step 802: If the number of available submodules is less than or equal to the required number, a power increase operation request is output. Upon receiving a confirmation instruction returned in response to the power increase operation request, the process returns to the step of determining the operating status of the power grid system based on the power demand parameters of the power grid system.

[0146] The power increase operation request is a request for the power grid system to increase the power operation. Please refer to Figure 10. In the solution of this embodiment, when the number of available new energy sub-modules is less than the required number of inputs, it means that even if the current new energy sub-module is put into operation, the electric energy provided by the new energy energy storage system to the power grid system cannot be fully consumed, that is, there is excess electric energy. In order to improve the utilization rate of electric energy, the control device will request the power grid system (superior control) to increase the power operation to increase the consumption of electric energy and reduce the waste of output electric energy. If the upper control returns a confirmation instruction and agrees to execute the power increase control, the control device will return to the operation of obtaining the power demand parameters of the power grid system, re-judge the operating status in combination with the power demand parameters, and control the switching of the current new energy sub-module.

[0147] In the above scheme, when the grid system is absorbing power and the power demand parameter is less than the output state parameter, if the number of available submodules is less than or equal to the required number, this means that even if the new energy submodules are currently operational, the output of the new energy generation module will be excessive. In this case, a power increase request will be issued to increase the power of the grid system, consuming the power output of the new energy generation module and improving energy utilization.

[0148] Please refer to FIG. 9 . In some embodiments, after step 802 , the method further includes step 804 .

[0149] Step 804 : When no confirmation instruction is received in response to the power increase operation request, the new energy power generation module of the new energy submodule is controlled to operate at reduced load until the output state parameter is less than or equal to the power demand parameter.

[0150] In the embodiment of the present application, when the output of the new energy power generation module is excessive, the power grid system is preferentially requested to increase its power to consume the excess electricity. If the power grid system does not agree to increase its power, that is, if it does not receive the confirmation instruction returned based on the power increase request, in order to reduce the waste of electricity, in the embodiment of the present application, the control device controls the new energy power generation module to reduce its load, and ultimately makes the output state parameter less than or equal to the power demand parameter, for example, the output current is less than or equal to the current parameter. After the load reduction operation makes the output state parameter less than or equal to the power demand parameter, the control device will return to the operation of determining the operating state of the power grid system based on the power demand parameter of the power grid system, and re-judge the operating state of the energy storage system.

[0151] In the above scheme, if the power grid system does not agree after the output power increase operation request is received, the new energy power generation module used to generate electricity in the new energy sub-module will be controlled to operate at a reduced load, thereby reducing the output power of the new energy power generation module and improving the operation safety of the new energy energy storage system.

[0152] Please refer to FIG. 11 . In some embodiments, when the operating state includes power absorption operation and the power demand parameter is greater than the output state parameter, after step 602 or step 702 , the method further includes step 1002 .

[0153] Step 1002: If the number of available submodules is less than or equal to the required number, a power reduction operation request is output. Upon receiving a confirmation instruction returned in response to the power reduction operation request, the process returns to the step of determining the operating state of the power grid system based on the power demand parameters of the power grid system.

[0154] A power reduction operation request is a request for the power grid system to reduce power operation. Please refer to Figure 12. In the solution of this embodiment, when the number of available new energy sub-modules is less than the required number of inputs, it indicates that even if the current new energy sub-modules are put into operation, the electric energy provided by the new energy energy storage system still cannot meet the needs of the power grid system. In order to improve the utilization rate of electric energy, the control device will request the power grid system (superior control) to reduce power operation to reduce electric energy consumption. If the upper control returns a confirmation instruction and agrees to execute the power reduction control, the control device will return to the operation of determining the operating status of the power grid system based on the power demand parameters of the power grid system, and re-determine the operating status in combination with the power demand parameters.

[0155] In the above scheme, when the power grid system is absorbing power and the power demand parameter is greater than the output state parameter, if the number of available submodules is less than or equal to the required number, it means that even if the new energy submodules are currently in operation, the output of the new energy generation module cannot meet the demand. In this case, a power reduction operation request will be issued to reduce the power of the power grid system, reduce the consumption of the output power of the new energy generation module, and improve the operational reliability of the new energy storage system.

[0156] Please refer to FIG. 11 . In some embodiments, after step 1002 , the method further includes steps 1003 , 1004 , 1005 and 1006 .

[0157] Step 1003: If no confirmation instruction returned according to the power reduction operation request is received, the new energy storage system is controlled to be locked.

[0158] Step 1004: Obtain the battery availability score corresponding to the current new energy sub-module.

[0159] Step 1005 : When the battery available score is not zero, control the new energy power generation module of the current new energy sub-module to charge the battery module of the current new energy sub-module.

[0160] Step 1006: When the battery available score is zero, the new energy power generation module is controlled to operate without power.

[0161] In this embodiment, if the output of the new energy generation module cannot meet the grid system's requirements, the control device prioritizes requesting the grid system to reduce power. If the grid system disagrees with the power reduction, i.e., if it does not receive a confirmation instruction in response to the power reduction request, the control device in this embodiment controls the new energy storage system to directly shut down.

[0162] To minimize the possibility of the new energy generation module abandoning power, the control device will then determine the battery availability score of the current new energy submodule. If the battery module is available, the new energy generation module will be controlled to output power to charge the battery module of the current new energy submodule. If the battery module is unavailable (including when the battery module is fully charged), the new energy generation module will be controlled to abandon power.

[0163] In this solution, if the grid disagrees with a power reduction request, the new energy storage system is shut down, improving operational safety. By further analyzing the available battery capacity of the new energy submodule, the new energy generation module is used to charge the battery module of the new energy submodule, maximizing the possibility of maintaining the new energy generation module's energy consumption.

[0164] Please refer to FIG. 13 , in some embodiments, step 304 further includes step 122 .

[0165] Step 122 : When the power demand parameter is equal to the output state parameter, control the current new energy submodule to be put into operation.

[0166] In this embodiment, after obtaining the power demand parameter and the output state parameter, the control device determines the magnitude of the two. If the power demand parameter is less than the output state parameter, the control strategy shown in Figure 10 is executed. If the power demand parameter is greater than the output state parameter, the control strategy shown in Figure 12 is executed. If the power demand parameter is equal to the output state parameter, no further analysis of the new energy sub-module is required. The current new energy sub-module is directly controlled to start operation, and the new energy power generation module can supply energy to the power grid system.

[0167] In the above scheme, when the power demand parameter is equal to the output state parameter, the current new energy submodule is directly controlled to be put into operation, and the new energy power generation module is used to provide power to the power grid system, thereby improving the utilization rate of the new energy power generation module.

[0168] Please refer to FIG. 14 . In some embodiments, when the operating state includes power generation operation, after step 602 or step 702 , the method further includes step 132 .

[0169] Step 132: If the number of available submodules is less than or equal to the required number of submodules, a control strategy change request is output. Upon receiving a confirmation instruction based on the control strategy change request, the process returns to the step of obtaining the output state parameters of the new energy power generation module of the new energy submodule.

[0170] The control strategy change request is a signal requesting a change in the switching strategy for the new energy submodules of the new energy storage system. In this embodiment, when the power grid system is generating power and the number of available submodules is less than or equal to the required number, the control device will request a change in the control strategy to that corresponding to the power grid system's absorbing power state. Specifically, the control device executes switching control based on the relationship between the output state parameter and the operating state parameter, and the submodule availability score and battery availability score of the new energy submodule.

[0171] In the above scheme, when operating under power output, if it is detected that the number of available sub-modules is less than or equal to the required number of sub-modules, the control strategy will be changed. According to the received confirmation instruction, the execution is returned to obtain the output state parameters of the new energy power generation module of the new energy storage system connected to the power grid system. That is, the switching control is carried out according to the control strategy under the power absorption operation, thereby improving the operational reliability of the new energy storage system.

[0172] Please refer to FIG. 14 . In some embodiments, after step 132 , the method further includes steps 133 , 134 , 135 and 136 .

[0173] Step 133: If no confirmation instruction is received based on the feedback of the control strategy change request, the new energy storage system is controlled to be locked.

[0174] Step 134: Obtain the battery available score corresponding to the current new energy sub-module.

[0175] Step 135 : When the battery available score is not zero, control the new energy power generation module of the new energy storage system to charge the current new energy sub-module.

[0176] Step 136: When the battery available score is zero, control the new energy power generation module to operate without power.

[0177] With reference to FIG15 , in the solution of this embodiment, if the control device does not agree to change the control strategy (that is, if the confirmation instruction of the feedback based on the control strategy change request is not received), the control device will directly lock the new energy storage system. After that, in order to minimize the occurrence of the situation where the new energy power generation module abandons energy operation, the control device will judge the battery availability score of the current new energy sub-module. If the battery module is available, the new energy power generation module is controlled to output electric energy to charge the battery module of the current new energy sub-module; if the battery module is not available (including the situation where the battery module is fully charged), the abandonment operation control of the new energy power generation module will be executed.

[0178] In this solution, if the output control strategy change request is not approved, the new energy storage system is locked, improving the operational safety of the new energy storage system. By further analyzing the current available battery value of the new energy submodule, the new energy power generation module is used to charge the battery module of the new energy submodule, maximizing the possibility of the new energy power generation module operating without wasting energy.

[0179] In some embodiments, the method for determining the battery usable score includes: performing a weighted analysis based on at least one of the battery state of charge, battery power capability parameter, and battery health status of the current new energy sub-module to determine the battery usable score.

[0180] Battery power capability parameters are power-related parameters of the battery module during the charging and discharging process, including but not limited to the battery's rated power and maximum output power, and are not specifically limited. There is no single method for determining the battery usable score; any battery parameter that changes during the charging and discharging process can be used. The solution of this embodiment uses a weighted calculation of one or more of the battery state of charge, battery power capability parameters, and battery health status to ultimately determine the battery usable score.

[0181] The above solution combines at least one of the battery state of charge, battery power capability parameters and battery health status for weighted calculation to obtain the battery usable score, so that the battery usable score matches the current new energy sub-module, thereby improving the accuracy of the battery usable score.

[0182] In some embodiments, the method for determining the available score of the sub-module includes: determining the charging and discharging battery demand parameters based on the power demand parameters and the output state parameters; performing a weighted analysis based on the charging and discharging battery demand parameters, the output performance parameters of the new energy power generation module in the current new energy sub-module, the battery charge state of the current new energy sub-module, the battery power capability parameters, the battery charging and discharging current and the battery health status to determine the available score of the sub-module.

[0183] The output performance parameters of the new energy power generation module are parameters related to the output performance of the new energy power generation module. These parameters may include current output power parameters, achievable output power parameters under different environmental conditions, or output power parameters predicted for the future based on the current environment, etc., without limitation.

[0184] The solution of this embodiment is explained by taking the case where both the power demand parameter and the output state parameter are current and the charge and discharge battery demand parameter are current as examples. The control device first determines the charge and discharge battery demand parameter based on the power demand parameter and the output state parameter. Specifically, the method for determining the charge and discharge battery demand parameter will vary depending on the charge and discharge state of the battery module. When the battery module is in the charging state, the method for determining the charge and discharge battery demand parameter includes: bat =I renew -|I sys |, where I bat Indicates the charging and discharging battery requirement parameters, I renew Indicates the output state parameter, I sys Indicates the power demand parameter. When the battery module is in the charging state, the method for determining the charging and discharging battery demand parameters includes: bat =I renew -(-|I sys |).

[0185] Finally, the control device performs weighted analysis and calculation based on one or more of the charging and discharging battery demand parameters, the output performance parameters of the new energy power generation module, the battery state of charge, the battery power capability parameters, the battery charging and discharging current, and the battery health status to obtain the sub-module available score.

[0186] It is understood that the weighted calculation method of the available scores of the submodules is not unique. In some embodiments, taking the weighted calculation based on the charging and discharging battery demand parameters, the output performance parameters of the new energy power generation module, the battery state of charge, the battery power capability parameters, the battery charging and discharging current and the battery health status as an example, the calculation method can be: a*I bat +b*P1+c*SOC+d*P2+e*I+f*SOH, where a, b, c, d, e, and f are all constants greater than zero and less than 1, and a+b+c+d+e+f=1, I bat It represents the charging and discharging battery demand parameters, P1 represents the output performance parameters of the new energy power generation module, SOC represents the battery state of charge, P2 represents the battery power capability parameter, I represents the battery charging and discharging current, and SOH represents the battery health status.

[0187] In other embodiments, any two, three, four, five or six of the charging and discharging battery demand parameters, the output performance parameters of the new energy power generation module, the battery state of charge, the battery power capability parameters, the battery charging and discharging current and the battery health status can be selected and calculated using a weighted analysis method similar to the above, which will not be repeated here.

[0188] The above scheme combines current parameters, output performance parameters of new energy power generation modules, battery state of charge, battery power capability parameters, battery charge and discharge current, and battery health status to perform weighted calculations to obtain the submodule available score, so that the submodule available score is more closely matched with the new energy storage system, thereby improving the accuracy of the submodule available score.

[0189] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0190] In order to facilitate understanding of the technical solution of the present application, the present application is explained below in conjunction with more detailed embodiments.

[0191] Please refer to Figures 10, 12, 15 and 16. First, the control device obtains the power demand parameters of the power grid system (including the power parameter P sys and current parameter I sys ), in order to judge the operating status of the power grid system, if P sys >0, or I sys >0, it is determined that the power grid system is absorbing power; otherwise, it is considered that the power grid system is emitting power.

[0192] When the power grid system is absorbing power, execute ①. Obtain the output state parameters (including output power P renew and output current I renew ). The control device determines I renew Is it greater than I sys If the two are equal, directly control the current new energy sub-module to be put into operation.

[0193] If I renew >I sys , then according to I bat =I renew -|I sys |Calculate and obtain the charging and discharging battery demand parameter I bat , combined with I bat , the output performance parameters of the new energy power generation module in the current new energy submodule, the battery state of charge of the current new energy submodule, the battery power capability parameters, the battery charge and discharge current and the battery health status are weightedly calculated to obtain the submodule available score of the current new energy submodule

[0194] Then judge Is it equal to 0? If it is equal to zero, it means that the current new energy submodule is unavailable. The number of available submodules is N. able One will be reduced from the original basis, that is, N able =N able -1. Then judge the updated N able Is it greater than the required input quantity N ref (It can be calculated based on the current voltage requirement). able >N ref , the current new energy submodule is switched out for operation, and further weighted analysis is performed based on at least one of the battery state of charge, battery power capability parameter, and battery health status of the current new energy submodule to obtain the battery availability score. judge Is it equal to zero? If it is not equal to 0, it means that the battery module of the current new energy submodule is available. At this time, the control device controls the new energy power generation module to charge the battery module until it is fully charged. If it is zero, it means that the battery module is fully charged at this time, and the control device will control the new energy power generation module to abandon wind or solar operation.

[0195] In judging If it is not 0, the current new energy submodule is available, and N is maintained. able unchanged, that is, N able =N able , the control device also needs to judge N able Is it greater than the required input quantity N ref If N able >N ref , the current new energy sub-module is put into operation, so that the new energy power generation module can supply energy to the power grid system and the current battery module at the same time.

[0196] Whether N able Whether there is a change, in judging N able>N ref If N able ≤N ref , the control device will output a power increase request to the power grid system. If the power grid system agrees, it will return to re-acquire the power demand parameters of the power grid system and re-judge the switching of the current new energy sub-module. If the power grid system disagrees, it is necessary to control the new energy power generation module to reduce the load until I renew ≤I sys After that, it returns to re-acquire the power demand parameters of the power grid system and re-judges the switching of the current new energy sub-module.

[0197] If I renew sys , then according to I bat =I renew -|I sys |Calculate and obtain the charging and discharging battery demand parameter I bat , combined with I bat Calculate the available submodule score of the current new energy submodule (The specific calculation method is the same as above and will not be repeated here.) Is it equal to 0? If it is equal to zero, it means that the current new energy submodule is unavailable. The number of available submodules is N. able One will be reduced from the original basis, that is, N able =N able --1. Then judge the updated N able Is it greater than the required input quantity N ref If N able >N ref , the current new energy submodule is switched out for operation, and the battery available score is further calculated based on (The calculation method is similar to the above and will not be repeated here), judge Is it equal to zero? If it is not equal to 0, it means that the battery module of the current new energy submodule is available. At this time, the control device controls the new energy power generation module to charge the battery module until it is fully charged. If it is zero, it means that the battery module is fully charged at this time, and the control device will control the new energy power generation module to abandon wind or solar operation.

[0198] In judging If it is not 0, the current new energy submodule is available, and N is maintained. able unchanged, that is, N able =N able , the control device also needs to judge N able Is it greater than the required input quantity N ref If N able >N​ref , the current new energy sub-module is put into operation, so that the new energy power generation module can simultaneously supply energy to the power grid system and the battery module of the current new energy sub-module.

[0199] Whether N able Whether there is a change, in judging N able >N ref If N able ≤N ref , the control device will output a power reduction request to the grid system. If the grid system agrees, it will return to re-acquire the power demand parameters of the grid system and re-judge the switching of the current new energy sub-module. If the grid system disagrees, it is necessary to control the new energy storage system to lock and further calculate the battery available score. (The calculation method is similar to the above and will not be repeated here), judge Is it equal to zero? If it is not equal to 0, it means that the battery module of the current new energy submodule is available. At this time, the control device controls the new energy power generation module to charge the battery module until it is fully charged. If it is zero, it means that the battery module is fully charged at this time, and the control device will control the new energy power generation module to abandon wind or solar operation.

[0200] When the power grid system absorbs power, execute ②, according to I bat =I renew --(-|I sys |) to calculate and obtain the charging and discharging battery demand parameter I bat , combined with I bat Calculate the available submodule score of the current new energy submodule (The specific calculation method is the same as above and will not be repeated here.) Is it equal to 0? If it is equal to zero, it means that the current new energy submodule is unavailable. The number of available submodules is N. able One will be reduced from the original basis, that is, N able =N able -1. Then judge the updated N able Is it greater than the required input quantity N ref If N able >N ref , the current new energy submodule is switched out for operation, and the battery available score is further calculated based on (The calculation method is similar to the above and will not be repeated here), judge Is it equal to zero? If it is not equal to 0, it means that the battery module of the current new energy submodule is available. At this time, the control device controls the new energy power generation module to charge the battery module until it is fully charged. If it is zero, it means that the battery module is fully charged at this time, and the control device will control the new energy power generation module to abandon wind or solar operation.

[0201] In judging If it is not 0, the current new energy submodule is available, and N is maintained. able unchanged, that is, N able =N able , the control device also needs to judge N able Is it greater than the required input quantity N ref If N able >N ref , the current new energy sub-module is put into operation, so that the new energy power generation module can simultaneously supply energy to the power grid system and the battery module of the current new energy sub-module.

[0202] Whether N able Whether there is a change, in judging N able >N ref If N able ≤N ref , the control device will output a request to change the control strategy to execute ① instead. If you agree to change to execute ①, then jump to execute the operation of obtaining the output state parameters of the new energy power generation module in ①. If you do not agree to change to execute ①, you need to control the new energy storage system to lock, and further calculate the battery available score. (The calculation method is similar to the above and will not be repeated here), judge Is it equal to zero? If it is not equal to 0, it means that the battery module of the current new energy submodule is available. At this time, the control device controls the new energy power generation module to charge the battery module until it is fully charged. If it is zero, it means that the battery module is fully charged at this time, and the control device will control the new energy power generation module to abandon wind or solar operation.

[0203] Based on the same inventive concept, the present application also provides an energy storage operation device for implementing the aforementioned energy storage operation method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more energy storage operation embodiments provided below can be found in the above-mentioned limitations of the energy storage operation method and will not be further elaborated here.

[0204] Please refer to FIG. 17 . The present application further provides an energy storage operation device, including: an operation determination module 162 and a switching control module 166 .

[0205] The operation determination module 162 is used to determine the operating status of the power grid system based on the power demand parameters of the power grid system; the switching control module 166 is used to control the switching operation of the new energy sub-module of the new energy energy storage system connected to the power grid system based on the operating status, combined with the battery available score and sub-module available score of the new energy sub-module.

[0206] In some embodiments, the operating state includes power absorption operation, and the switching control module 166 is also used to obtain the output state parameters of the new energy power generation module of the new energy sub-module in the new energy energy storage system connected to the power grid system when the power grid system is in power absorption operation; according to the power demand parameters and the output state parameters, combined with the battery available score and the sub-module available score of the new energy sub-module, the switching operation of the new energy sub-module of the new energy storage system is controlled.

[0207] In some embodiments, the switching control module 166 is also used to control the switching operation of the current new energy submodule according to the battery available score and submodule available score corresponding to the current new energy submodule of the new energy energy storage system when the power demand parameter is not equal to the output state parameter.

[0208] In some embodiments, the operating state includes power generation operation, and the switching control module 166 is also used to control the switching operation of the current new energy sub-module according to the battery available score and sub-module available score corresponding to the current new energy sub-module of the new energy energy storage system when the power grid system is in power generation operation.

[0209] In some embodiments, the switching control module 166 is also used to obtain the submodule available score corresponding to the current new energy submodule of the new energy storage system; when the submodule available score is zero, the number of available submodules of the new energy storage system is reduced by one; when the number of available submodules is greater than the required number of inputs, the current new energy submodule is controlled to be switched out of operation; obtain the battery available score corresponding to the current new energy submodule of the new energy storage system; when the battery available score is not zero, the new energy power generation module of the current new energy submodule is controlled to charge the battery module of the current new energy submodule; when the battery available score is zero, the new energy power generation module is controlled to abandon power operation.

[0210] In some embodiments, the switching control module 166 is also used to maintain the number of available submodules of the new energy storage system unchanged when the submodule availability score is not zero; when the number of available submodules is greater than the required number of submodules, control the current new energy submodule to be put into operation.

[0211] In some embodiments, switching control module 166 is further configured to output a power-up operation request when the number of available submodules is less than or equal to the required number of submodules. Upon receiving a confirmation instruction returned in response to the power-up operation request, operation determination module 162 is controlled to determine the operating state of the power grid system based on the power demand parameters of the power grid system.

[0212] In some embodiments, the switching control module 166 is also used to control the new energy power generation module of the new energy sub-module to operate at reduced load until the output state parameter is less than or equal to the power demand parameter when no confirmation instruction returned based on the power increase operation request is received.

[0213] In some embodiments, switching control module 166 is further configured to output a power reduction operation request when the number of available submodules is less than or equal to the required number of submodules. Upon receiving a determination instruction returned in response to the power reduction operation request, operation determination module 162 is controlled to determine the operating state of the power grid system based on the power demand parameters of the power grid system.

[0214] In some embodiments, the switching control module 166 is also used to control the new energy storage system to lock when no confirmation instruction returned based on the power reduction operation request is received; obtain the battery available score corresponding to the current new energy sub-module; when the battery available score is not zero, control the new energy power generation module of the current new energy sub-module to charge the battery module of the current new energy sub-module; when the battery available score is zero, control the new energy power generation module to abandon power operation.

[0215] In some embodiments, the switching control module 166 is further configured to control the current new energy sub-module to be put into operation when the power demand parameter is equal to the output state parameter.

[0216] In some embodiments, the switching control module 166 is further configured to output a control strategy change request when the number of available submodules is less than or equal to the required number of submodules. Upon receiving a determination instruction based on the control strategy change request, the operation determination module 162 is controlled to determine the operating state of the power grid system based on the power demand parameters of the power grid system.

[0217] In some embodiments, the switching control module 166 is also used to control the new energy storage system to lock when no confirmation instruction is received based on the feedback of the control strategy change request; obtain the battery available score corresponding to the current new energy sub-module; when the battery available score is not zero, control the new energy power generation module of the current new energy sub-module to charge the battery module of the current new energy sub-module; when the battery available score is zero, control the new energy power generation module to abandon power operation.

[0218] When the new energy storage system is connected to the power grid and operating, the aforementioned energy storage operation device can determine the current operating state of the power grid system based on the power demand parameters of the power grid system. This device then determines a control strategy based on the power grid system's operating state to control the switching operation of each new energy submodule in the new energy storage system. This approach allows the switching operation of the new energy submodules in the new energy storage system to be automatically matched and controlled based on the power grid system's operating state, without the need for manual operation, thereby alleviating the low scheduling efficiency of the new energy storage system.

[0219] In some embodiments, the present application provides a computer device, which may be a terminal, and its internal structure diagram may be as shown in Figure 18. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method of energy storage operation is implemented. The display screen of the computer device may be a liquid crystal display or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a button, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0220] Those skilled in the art will understand that the structure shown in Figure 18 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0221] In some embodiments, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0222] The operating state of the power grid system is determined according to the power demand parameters of the power grid system; and the switching operation of the new energy submodule is controlled according to the operating state by combining the battery available score and the submodule available score of the new energy submodule.

[0223] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0224] The operating state of the power grid system is determined according to the power demand parameters of the power grid system; and the switching operation of the new energy submodule is controlled according to the operating state by combining the battery available score and the submodule available score of the new energy submodule.

[0225] In some embodiments, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the following steps:

[0226] The operating state of the power grid system is determined according to the power demand parameters of the power grid system; and the switching operation of the new energy submodule is controlled according to the operating state by combining the battery available score and the submodule available score of the new energy submodule.

[0227] The aforementioned computer device, storage medium, and computer program product, when a new energy storage system is connected to a power grid and operating, can determine the current operating state of the power grid system based on the power demand parameters of the power grid system. This can then be combined with the power grid system's operating state to determine a control strategy for controlling the switching operation of each new energy submodule in the new energy storage system. In this way, the switching operation of the new energy submodules in the new energy storage system can be automatically matched and controlled based on the operating state of the power grid system, without the need for manual operation, thereby alleviating the low scheduling efficiency of the new energy storage system.

[0228] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A new energy storage system, comprising a control device and a new energy submodule, wherein the new energy submodule comprises a power module, a battery module and a new energy power generation module, wherein the battery module is respectively connected to the power module and the new energy power generation module, and the power module and the new energy power generation module are respectively connected to the control device.

2. The new energy storage system according to claim 1, wherein: The new energy submodule further includes a converter, the battery module is connected to the new energy power generation module via the converter, and the converter is connected to the control device.

3. The new energy storage system according to claim 2, wherein: The converter includes at least one of a DC converter and an AC-DC converter.

4. The new energy storage system according to any one of claims 1 to 3, wherein: The power modules of the adjacent new energy sub-modules are cascaded in sequence and then connected to the power grid system.

5. The new energy storage system according to any one of claims 1 to 4, wherein: The new energy power generation module includes at least one of a photovoltaic power generation module, a wind power generation module, a tidal power generation module and a biomass power generation module.

6. A method for energy storage operation based on the new energy storage system according to any one of claims 1 to 5, comprising: Determining the operating state of the power grid system according to the power demand parameter of the power grid system; According to the operating state, the switching operation of the new energy submodule is controlled by combining the battery available score and the submodule available score of the new energy submodule.

7. The energy storage operation method according to claim 6, wherein: The operation state includes absorbing power operation, and the control of switching operation of the new energy submodule according to the operation state and combining the battery available score and the submodule available score of the new energy submodule includes: When the power grid system is in power absorption operation, obtaining output state parameters of the new energy power generation module of the new energy submodule; The switching operation of the new energy submodule is controlled according to the power demand parameter and the output state parameter in combination with the battery available score and the submodule available score of the new energy submodule.

8. The energy storage operation method according to claim 7, wherein: The controlling the switching operation of the new energy submodule according to the power demand parameter and the output state parameter in combination with the battery available score and the submodule available score of the new energy submodule comprises: When the power demand parameter is not equal to the output state parameter, the current new energy submodule is controlled to be switched on and off according to the battery available score and the submodule available score corresponding to the current new energy submodule of the new energy storage system.

9. The energy storage operation method according to claim 6, wherein: The operation state includes power generation operation, and the control of switching operation of the new energy submodule according to the operation state and the battery available score and the submodule available score of the new energy submodule includes: When the power grid system is in power generation operation, the current new energy submodule of the new energy storage system is controlled to be switched on and off according to the battery available score and the submodule available score corresponding to the current new energy submodule.

10. The energy storage operation method according to claim 8 or 9, wherein: The step of controlling the switching operation of the current new energy submodule according to the battery available score and the submodule available score corresponding to the current new energy submodule of the new energy storage system comprises: Obtaining a submodule available score corresponding to a current new energy submodule of the new energy storage system; When the available score of the submodule is zero, reducing the number of available submodules of the new energy storage system by one; When the number of available submodules is greater than the required number of input submodules, controlling the current new energy submodule to be switched out for operation; Obtaining a battery available score corresponding to a current new energy submodule of the new energy storage system; When the available score of the battery is not zero, controlling the new energy power generation module of the current new energy submodule to charge the battery module of the current new energy submodule; When the available score of the battery is zero, the new energy power generation module is controlled to operate without energy.

11. The energy storage operation method according to claim 10, wherein: After obtaining the submodule available score corresponding to the current new energy submodule of the new energy storage system, the method further includes: When the available score of the submodule is not zero, maintaining the number of available submodules of the new energy storage system unchanged; When the number of available submodules is greater than the required number, the current new energy submodule is controlled to be put into operation.

12. The energy storage operation method according to claim 11, wherein: When the operating state includes absorbing power operation and the power demand parameter is less than the output state parameter, when the available score of the submodule is zero, after reducing the number of available submodules of the new energy storage system by one, or when the available score of the submodule is not zero, maintaining the number of available submodules of the new energy storage system unchanged, the method further includes: When the number of available submodules is less than or equal to the required number of submodules, outputting a power-up operation request; When receiving the determination instruction returned according to the power increase operation request, return to the step of determining the operation state of the power grid system according to the power demand parameter of the power grid system.

13. The energy storage operation method according to claim 12, wherein: After outputting a power-up operation request when the number of available submodules is less than or equal to the required number of submodules, the method further includes: In the case where a confirmation instruction returned according to the power increase operation request is not received, the new energy power generation module of the new energy submodule is controlled to operate at a reduced load until the output state parameter is less than or equal to the power demand parameter.

14. The energy storage operation method according to claim 11, wherein: When the operating state includes absorbing power operation and the power demand parameter is greater than the output state parameter, when the available score of the submodule is zero, after reducing the number of available submodules of the new energy storage system by one, or when the available score of the submodule is not zero, maintaining the number of available submodules of the new energy storage system unchanged, the method further includes: When the number of available submodules is less than or equal to the required number of submodules, outputting a power reduction operation request; When receiving the determination instruction returned according to the power reduction operation request, return to the step of determining the operation state of the power grid system according to the power demand parameter of the power grid system.

15. The energy storage operation method according to claim 14, wherein: After outputting a power reduction operation request when the number of available submodules is less than or equal to the required number of submodules, the method further includes: In the case where a confirmation instruction returned according to the power reduction operation request is not received, controlling the new energy storage system to be locked; Obtaining the battery available score corresponding to the current new energy submodule; When the available score of the battery is not zero, controlling the new energy power generation module of the current new energy submodule to charge the battery module of the current new energy submodule; When the available score of the battery is zero, the new energy power generation module is controlled to operate without energy.

16. The energy storage operation method according to any one of claims 7 to 15, wherein: The controlling the switching operation of the new energy submodule according to the power demand parameter and the output state parameter in combination with the battery available score and the submodule available score of the new energy submodule also includes: When the power demand parameter is equal to the output state parameter, the current new energy submodule is controlled to be put into operation.

17. The energy storage operation method according to claim 11, wherein: In the case where the operating state includes power generation operation, after reducing the number of available submodules of the new energy storage system by one when the available score of the submodule is zero, or maintaining the number of available submodules of the new energy storage system unchanged when the available score of the submodule is not zero, the method further includes: When the number of available submodules is less than or equal to the required input number, outputting a control strategy change request; When receiving a confirmation instruction of requesting feedback according to the control strategy change, the step of obtaining the output state parameter of the new energy power generation module of the new energy submodule is returned.

18. The energy storage operation method according to claim 17, wherein: After outputting a control strategy change request when the number of available submodules is less than or equal to the required number of input submodules, the method further includes: In the case of not receiving a confirmation instruction according to the control strategy change request feedback, controlling the new energy storage system to lock; Get the battery available score corresponding to the current new energy submodule; When the available score of the battery is not zero, controlling the new energy power generation module of the current new energy submodule to charge the battery module of the current new energy submodule; When the available score of the battery is zero, the new energy power generation module is controlled to operate without energy.

19. The energy storage operation method according to any one of claims 6 to 18, wherein: The method for determining the battery available score includes: A weighted analysis is performed according to at least one of the battery state of charge, the battery power capability parameter, and the battery health state of the current new energy submodule to determine the battery availability score.

20. The energy storage operation method according to any one of claims 6 to 19, wherein: The method for determining the available scores of the submodules includes: Determining a charge and discharge battery demand parameter according to the power demand parameter and the output state parameter; A weighted analysis is performed based on at least one of the charge and discharge battery demand parameters, the output performance parameters of the new energy power generation module in the current new energy sub-module, the battery state of charge of the current new energy sub-module, the battery power capability parameters, the battery charge and discharge current and the battery health status to determine the sub-module available score.

21. An energy storage operation device based on the new energy storage system according to any one of claims 1 to 5, comprising: An operation determination module, used to determine the operation state of the power grid system according to the power demand parameters of the power grid system; The switching control module is used to control the switching operation of the new energy submodule according to the operating state and in combination with the battery available score and the submodule available score of the new energy submodule.

22. A computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the energy storage operation method according to any one of claims 6 to 20 when executing the computer program.

23. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the energy storage operation method according to any one of claims 6 to 20.

24. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the energy storage operation method according to any one of claims 6 to 20 are implemented.

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