New energy storage system, energy storage operation method and device thereof and computer equipment

Abstract

The invention relates to a new energy storage system and an energy storage operation method and device thereof, computer equipment, a storage medium and a computer program product. A new energy power generation module, a power module and a battery module are integrated to form a new energy sub-module; and the power module and the new energy power generation module in the new energy sub-module are respectively connected with the control device, so that the modularized new energy storage system is constructed and formed. Therefore, under the control of the control device, switching operation of the new energy sub-modules in the new energy storage system can be automatically realized, manual operation is not needed, and the problem of low scheduling efficiency of the new energy storage system is effectively relieved.

Description

Technical Field

[0001] 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

[0002] Energy storage provides frequency regulation and peak regulation in all aspects of power generation, transmission, distribution and use, stabilizing the frequency of the power grid, alleviating grid congestion, and improving the flexibility of power generation and use, bringing great convenience to daily production and life. With the continuous development of energy storage technology and the proposal of sustainable development, new energy storage systems have become a hot topic of research and have broad application prospects due to their advantages of being green, pollution-free, low-carbon, environmentally friendly and clean and renewable.

[0003] However, in the related art, the new energy storage system is operated through manual scheduling, and the scheduling efficiency is low. Summary of the invention

[0004] 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.

[0005] The present application provides a new energy storage system, including a control device and a new energy sub-module, wherein the new energy sub-module includes 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 modules of adjacent new energy sub-modules are cascaded in sequence and connected to a power grid system, and the power module and the new energy power generation module are respectively connected to the control device.

[0006] The above-mentioned new energy storage system integrates the new energy generation module with the power module and the battery module to form a new energy sub-module, and the power module and the new energy generation module in the new energy sub-module are respectively connected to the control device, thereby forming a modular new energy storage system. In this way, the switching operation of the new energy sub-module 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.

[0007] 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.

[0008] In the above scheme, a converter is also 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 the battery module for storage, thereby improving the reliability of electric energy storage.

[0009] In some embodiments, the converter includes at least one of a DC converter and an AC-DC converter.

[0010] In the above scheme, the converter can be set as a DC converter and / or an AC / DC converter according to 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.

[0011] In some embodiments, the power modules of adjacent new energy sub-modules are cascaded in sequence and then connected to the power grid system.

[0012] In the above scheme, the new energy storage system includes multiple new energy sub-modules, and each new energy sub-module is cascaded in sequence through its own power module, and the cascaded architecture is connected to the power grid system. In this way, the power grid system is powered by the new energy storage system, providing guarantee for maintaining the long-term and stable operation of the power grid system.

[0013] 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.

[0014] 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, which effectively broadens the power acquisition mode of the new energy storage system and improves the power generation reliability of the new energy storage system.

[0015] The present application also provides an energy storage operation method, including: determining the operating state of the power grid system according to the power demand parameters of the power grid system; and according to the operating state, combining the battery available score and the submodule available score of the new energy submodule to control the switching operation of the new energy submodule.

[0016] The above energy storage operation method, when the new energy energy storage system is connected to the power grid system for operation, can determine the current operating state of the power grid system in combination with the power demand parameters of the power grid system. After that, the switching operation of each new energy submodule in the new energy energy storage system is controlled in combination with the operating state of the power grid system, as well as the battery available score and submodule available score of the new energy submodule. In this way, the switching operation of the new energy submodule of the new energy energy storage system can be automatically matched and controlled in combination with the operating state of the power grid system, which can be achieved without manual operation, thereby alleviating the problem of low scheduling efficiency of the new energy storage system.

[0017] In some embodiments, the operating state includes power absorption operation, and the switching operation of the new energy sub-module is controlled based on the operating state in combination with the battery available score and the sub-module available score of the new energy sub-module, including: when the power grid system is in power absorption operation, obtaining the output state parameters of the new energy power generation module of the new energy sub-module; according to the power demand parameters and the output state parameters, in combination with the battery available score and the sub-module available score of the new energy sub-module, controlling the switching operation of the new energy sub-module.

[0018] The above scheme, when the power grid system is in the absorption power 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 matched with the operation of the new energy storage system, and improve the switching reliability of the new energy sub-module under the absorption power operation.

[0019] In some embodiments, the switching operation of the new energy sub-module is controlled according to the power demand parameter and the output state parameter in combination with the battery available score and the sub-module available score of the new energy sub-module, including: when the power demand parameter is not equal to the output state parameter, the switching operation of the current new energy sub-module is controlled according to the battery available score and the sub-module available score corresponding to the current new energy sub-module of the new energy storage system.

[0020] In the above scheme, when the switching control of the new energy sub-module is performed according to the power demand parameter and the output state parameter, if the power demand parameter is not equal to the output state parameter, it is necessary to further combine the battery available score of the current new energy sub-module and the sub-module available score 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.

[0021] In some embodiments, the operating state includes power generation operation, and the switching operation of the new energy sub-module is controlled based on the operating state and in combination with the battery available score and the sub-module available score of the new energy sub-module, including: when the power grid system is in power generation operation, 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 storage system.

[0022] 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.

[0023] 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 and run.

[0024] The above scheme can determine the number of available submodules according to the available submodule score of the current new energy submodule, control the switching of the current new energy submodule according to the available submodule score and the required input quantity, and control the operation of the new energy power generation module according to the available battery score of the current new energy submodule. When the current new energy submodule is switched out, the new energy power generation module of the new energy submodule can be used to charge the battery module, so as to maximize the possibility of the new energy power generation module not abandoning the operation.

[0025] 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 submodules, controlling the current new energy submodule to be put into operation.

[0026] In the above scheme, when the submodule available score of the current new energy submodule is not zero, the number of available submodules is maintained unchanged, and the input control of the current new energy submodule is performed, so that the output of the new energy power generation module is consistently in the maximum power tracking state, thereby improving the utilization rate of the new energy power generation module.

[0027] 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 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, it also includes: when the number of available submodules is less than or equal to the required number of inputs, outputting a power increase operation request; and when receiving a determination instruction returned according to the power increase operation request, returning to the step of determining the operating state of the power grid system according to the power demand parameter of the power grid system.

[0028] In the above scheme, when the power grid system absorbs 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 of input modules, it means that even if the current new energy submodule is put into operation, the output of the new energy power generation module will be excessive. At this time, a power increase operation request will be output to make the power grid system increase power operation, consume the electric energy output by the new energy power generation module, and improve the utilization rate of electric energy.

[0029] In some embodiments, when the number of available sub-modules is less than or equal to the required number, 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 load operation until the output state parameter is less than or equal to the power demand parameter.

[0030] In the above scheme, if the power grid system does not agree to the output power increase operation request, 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 operating safety of the new energy storage system.

[0031] 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 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, it also includes: when the number of available submodules is less than or equal to the required number of inputs, outputting a power reduction operation request; and when receiving a determination instruction returned according to the power reduction operation request, returning to the step of determining the operating state of the power grid system according to the power demand parameter of the power grid system.

[0032] In the above scheme, when the power grid system absorbs 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 of input modules, it means that even if the current new energy submodule is put into operation, the output of the new energy power generation module cannot meet the demand. At this time, a power reduction operation request will be output to reduce the power of the power grid system, reduce the consumption of the output power of the new energy power generation module, and improve the operation reliability of the new energy storage system.

[0033] In some embodiments, when the number of available sub-modules is less than or equal to the required number, 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 energy operation.

[0034] In the above scheme, if the power grid system does not agree to the output power reduction operation request, the new energy storage system will be controlled to be locked, thereby improving the operation safety of the new energy storage system. By further analyzing the available value of the current new energy submodule battery, the new energy power generation module is used to charge the battery module of the new energy submodule, so as to maximize the operation of the new energy power generation module without abandoning energy.

[0035] In some embodiments, the switching operation of the new energy sub-module is controlled according to the power demand parameter and the output state parameter in combination 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.

[0036] 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 electric energy to the power grid system, thereby improving the utilization rate of the new energy power generation module.

[0037] In some embodiments, when the operating state includes power generation operation, 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, it also includes: when the number of available submodules is less than or equal to the required input quantity, outputting a control strategy change request; and when receiving a confirmation instruction fed back according to the control strategy change request, returning to the step of obtaining the output state parameters of the new energy power generation module of the new energy submodule.

[0038] In the above scheme, when operating under power generation, 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, and the output state parameters of the new energy power generation module of the new energy storage system connected to the power grid system will be obtained according to the received determination instruction. That is, the switching control is performed according to the control strategy under the power absorption operation, so as to improve the operation reliability of the new energy storage system.

[0039] In some embodiments, when the number of available sub-modules is less than or equal to the required number of inputs, after outputting the control strategy change request, it also includes: when no confirmation instruction based on the control strategy change request feedback is received, controlling the new energy storage system to lock; 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 energy operation.

[0040] In the above scheme, if the output control strategy change request is not approved, the new energy storage system is controlled to be locked, thereby improving the operational safety of the new energy storage system. By further analyzing the available value of the current new energy submodule battery, the new energy power generation module is used to charge the battery module of the new energy submodule, so as to maximize the possibility of the new energy power generation module not abandoning energy and operating.

[0041] In some examples, the method for determining the battery usable score includes: performing a weighted analysis according to at least one of a battery state of charge, a battery power capability parameter, and a battery health state of the current new energy submodule to determine the battery usable score.

[0042] The above scheme 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 available score, so that the battery available score matches the current new energy sub-module, thereby improving the accuracy of the battery available score.

[0043] In some embodiments, the method for determining the available score of the submodule includes: determining the charging and discharging battery demand parameter based on the power demand parameter and the output state parameter; performing a weighted analysis based on at least one of the charging and discharging battery demand parameter, the output performance parameter 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 parameter, the battery charging and discharging current and the battery health status to determine the available score of the submodule.

[0044] The above scheme combines 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 perform weighted calculation to obtain the sub-module available score, so that the sub-module available score is more matched with the new energy storage system, thereby improving the accuracy of the sub-module available score.

[0045] The present application also provides an energy storage operation device, including: an operation determination module, used to determine the operating state of the power grid system according to the power demand parameters of the power grid system; a switching control module, used to control the switching operation of the new energy sub-module according to the operating state, combined with the battery available score and the sub-module available score of the new energy sub-module.

[0046] 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.

[0047] The present application also provides a computer-readable storage medium having a computer program stored thereon, and the computer program implements the steps of the above-mentioned energy storage operation method when executed by a processor.

[0048] 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

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0050] Figure 1 This is a schematic diagram of the structure of a new energy storage system in some embodiments of the present application;

[0051] Figure 2 This is a schematic diagram of the structure of a new energy storage system in some other embodiments of the present application;

[0052] Figure 3 This is a schematic diagram of the energy storage operation method flow in some embodiments of the present application;

[0053] Figure 4 This is a schematic diagram of the energy storage operation method flow in other embodiments of the present application;

[0054] Figure 5 A schematic diagram of a flow chart of an energy storage operation method in some other embodiments of the present application;

[0055] Figure 6 This is a flow chart of the energy storage operation method in some embodiments of the present application;

[0056] Figure 7 This is a schematic diagram of the switching control process in some embodiments of the present application;

[0057] Figure 8 A schematic diagram of the switching control process in some other embodiments of the present application;

[0058] Fig. 9 A schematic diagram of the switching control process in some other embodiments of the present application;

[0059] Fig.10 This is a schematic diagram of the switching control process in the power absorption state in some embodiments of the present application;

[0060] Fig.11 This is a schematic diagram of the switching control process in some other embodiments of the present application;

[0061] Fig.12 A schematic diagram of the switching control process in the power absorption state in some other embodiments of the present application;

[0062] Fig.13 A schematic diagram of the switching control process in some other embodiments of the present application;

[0063] Fig.14 A schematic diagram of the switching control process in some other embodiments of the present application;

[0064] Fig.15 This is a schematic diagram of the switching control process in the power-generating state in some embodiments of the present application;

[0065] Fig.16 This is a schematic diagram of the operation status determination process in some embodiments of the present application;

[0066] Fig.17 This is a schematic diagram of the structure of the energy storage operation device in some embodiments of the present application;

[0067] Fig.18 This is a schematic diagram of the internal structure of a computer device in some embodiments of the present application. DETAILED DESCRIPTION

[0068] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0070] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0071] At present, from the perspective of market development, the application of energy storage systems is becoming more and more extensive, bringing great convenience to daily production and life. Among various energy storage technologies, high-voltage direct-mounted energy storage has gradually been developed and applied because of its highly modular structure, which can meet the needs of high efficiency, high reliability, economy and safety.

[0072] The high-voltage direct-hung energy storage system integrates the voltage source converter valve (also known as the VSC converter valve) and the energy storage valve. Specifically, the energy storage valve is connected between the VSC converter valves at both ends of the power grid, and the two ends of the energy storage valve are respectively connected to the power grid bus, so as to be connected to the power grid system for operation. When this type of high-voltage direct-hung energy storage system is connected to the grid and operated, a new energy power generation module is often connected to the energy storage valve, that is, a new energy energy storage system is obtained. The new energy energy storage system can generate electricity through the new energy power generation module to charge the battery module of the energy storage valve, which can effectively improve the utilization rate of energy.

[0073] The energy storage valve generally includes multiple cascaded energy storage valve submodules. When the new energy storage system is connected to the power grid system and operated in parallel, it is often necessary to adjust the input and output of the energy storage valve submodules in the new energy storage system according to the actual needs of the power grid system. In the related technology, the input and output of each energy storage valve submodule often need to be realized through manual scheduling. This scheduling method is not only inefficient, but also prone to errors, and the scheduling precision and accuracy are difficult to guarantee.

[0074] To alleviate the above problems, research has found that the new energy power generation module can be integrated with the energy storage valve. Specifically, the new energy power generation module can be distributed in each energy storage valve sub-module to form a new energy sub-module, and the new energy sub-module can be connected to the control device to form a modular new energy storage system. The control device automatically controls the operation mode of each new energy sub-module, changes the access status of the new energy power generation module, and thus controls the operation of the new energy storage system.

[0075] Based on the above considerations, the present application provides a new energy storage system, which integrates the new energy generation module with the power module and the 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 the control device, thereby forming a modular new energy storage system.

[0076] 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, which effectively alleviates the problem of low scheduling efficiency of the new energy storage system.

[0077] The specific application scenario of the new energy storage system of this application is not unique. 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. In order to facilitate the understanding of the technical solution of this application, the following can be understood as the application of the new energy storage system in the high-voltage direct-mounted energy storage scenario.

[0078] Please refer to Figure 1 A new energy storage system includes 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. The power module 11 and the new energy power generation module 13 are respectively connected to the control device.

[0079] Specifically, the power module 11 is a device for realizing power conversion; the battery module 12 is a device for storing and releasing electric energy; and 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 submodule 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, and there is no specific limitation. Figure 1The explanation is given by taking a half-bridge structure power module as an example. The battery module 12 may be a battery, or a battery pack formed by connecting a plurality of batteries in series and / or in parallel, without any specific limitation.

[0080] The control device is not limited to the way of switching on and off the new energy submodule 102. In a more detailed embodiment, when the new energy storage system is connected to the power grid system, the current operation state of the power grid system is determined in combination with the power demand parameters of the power grid system. After that, the control strategy is determined in combination with the operation state of the power grid system to control the switching operation of each new energy submodule 102 in the new energy storage system.

[0081] The above-mentioned 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 submodule 102, and the power module 11 and the new energy generation module 13 in the new energy submodule 102 are respectively connected to the control device, thereby forming a modular new energy storage system. In this way, the switching operation of the new energy submodule 102 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.

[0082] See also Figure 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, and the converter 14 is connected to a control device (not shown).

[0083] Specifically, 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 submodule 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, and the electric energy generated by the new energy power generation module 13 is converted into electric energy suitable for the battery module 12 for transmission through the converter 14. Furthermore, 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 the maximum power point tracking state.

[0084] In the above scheme, a converter 14 is also 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.

[0085] In some embodiments, the converter 14 includes at least one of a DC converter and an AC to DC converter.

[0086] Specifically, a DC converter, also known as a DC / DC (Direct Current / Direct Current) converter, is a device that converts DC power into DC power of different voltages. An AC / DC converter, also known as an AC / DC (Alternating Current / Direct Current), is a device that converts AC power into DC power. In the solution of this embodiment, in the same new energy submodule 102, only one DC converter, or one AC converter, or both an AC converter and a DC converter may be provided, and the selection may be made in accordance with actual needs.

[0087] It should be pointed out that the specific types of DC converters are not limited to non-isolated DC / DC converters, boost circuits (BOOST circuits), buck circuits (BUCK circuits) or isolated converters, phase-shifted full-bridge converters, etc.

[0088] In the above scheme, the converter 14 can be set as a DC converter and / or an AC / DC converter in combination with 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.

[0089] 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.

[0090] Specifically, the number of new energy submodules 105 is not unique. To meet the system scheduling requirements, the solution of this embodiment sets two or more new energy submodules 102 in the new 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, which can be combined with reference to Figure 1 or Figure 2 In the power module 11 of each new energy submodule 102, two AC ends of the power module 11 (i.e., the end of the power module 11 away from the energy storage module 12) are respectively connected to one AC end of the power module 11 of an adjacent new energy submodule 102, thereby completing the cascading of the new energy submodules 102. Finally, the two ends of the cascaded architecture (i.e., the energy storage valve) of each new energy submodule 102 are connected to the AC disconnection network.

[0091] It can be understood that in one embodiment, the new energy storage system may further include an inverter 106, and both ends of the cascaded new energy submodules 102 are connected to the inverter 106 and the power grid system. The modular design of each new energy submodule 102 can be used in different numbers according to the operation requirements in actual scenarios.

[0092] In the above scheme, the new energy storage system includes multiple new energy sub-modules 102, and each new energy sub-module 102 is cascaded in sequence through its own power module 11, and the cascaded architecture is connected to the power grid system. In this way, the power grid system is powered by the new energy storage system, providing a guarantee for maintaining the long-term and stable operation of the power grid system.

[0093] 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.

[0094] Specifically, 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 submodule 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 understand that one new energy submodule 102 is provided with one new energy power generation module 13, and the new energy power generation modules 13 in each new energy submodule 102 can be set the same or not completely the same, and the specific selection can be made in combination with actual needs.

[0095] In the above scheme, 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 storage system and improving the power generation reliability of the new energy storage system.

[0096] The explanation is given by taking the new energy power generation module 13 including a photovoltaic power generation module and a wind power generation module, and the new energy sub-module 102 being connected to the photovoltaic power generation module and the wind power generation module as an example. 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 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 also be controlled by MPPT (Maximum Power Point Tracking) to improve the utilization rate of the photovoltaic power generation module; or the output of the wind power generation module can be controlled by MPPT to improve the utilization rate of the wind power generation module.

[0097] See also Figure 3 The present application provides an energy storage operation method based on the above-mentioned new energy energy storage system, including step 202 and step 206.

[0098] Step 202: determining the operating state of the power grid system according to the power demand parameters of the power grid system.

[0099] Specifically, the power grid system is a power network system that is built by various power loads and power sources to consume and / or store power. The power demand parameter is the state parameter that the power load or power source in the power grid system needs to achieve when there is power demand (power demand).

[0100] The operating state refers to the state in which the power grid system emits power or absorbs power, including absorbing power operation and emitting power operation. Among them, 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 power for the load. Emitting power refers to the operating state in which the power grid system outputs voltage and current to the new energy storage system to charge the new energy storage system. In the two different states of the power grid emitting power operation and absorbing power operation, there are certain differences in the operation of the new energy storage system. Therefore, the solution of this embodiment needs to first determine the operating state of the power grid system in combination with the power demand parameters.

[0101] It should be pointed out that there is not only one way to obtain the power demand parameters. In one embodiment, the control device of the new energy storage system can 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.

[0102] 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 one embodiment, 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 power 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 power 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 the voltage, without the need to set up an additional detector, which effectively saves costs. In another embodiment, 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.

[0103] Step 206 , according to the operation state, the new energy submodule is controlled to switch on and off in combination with the battery available score of the new energy submodule and the submodule available score.

[0104] Specifically, the new energy storage system is an energy storage system connected to the devices related to new energy power generation. The current new energy submodule is the new energy submodule that needs to be switched on and off. The battery availability score is 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 It can be understood as the normalized parameter of the battery capacity of the jth new energy submodule, which is obtained by evaluating the battery performance of the battery module of the new energy submodule during charging and discharging. If the battery available score is not zero, it means that the battery module of the current new energy submodule is available, and the battery module can be charged and discharged in this state; if the battery available score is zero, it means that the battery module of the current new energy submodule is unavailable, and the battery module cannot be charged and discharged at this time.

[0105] The submodule available score 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 It can be understood as the normalized parameter of the comprehensive capacity of the jth new energy submodule (including battery module, power module, etc.), which is obtained by evaluating the output capacity of the new energy power generation module and the comprehensive battery performance of the battery module. If the submodule available score is not zero, it means that the current new energy submodule is available, and the new energy submodule can be connected to the new energy storage system for operation; if the submodule available score is zero, it means that the current new energy submodule is unavailable, and the current new energy submodule cannot be connected to the new energy storage system for operation.

[0106] In particular, in a more detailed embodiment, if the available score of the submodule only considers the battery module part and ignores the influence of the new energy power generation module, The equivalent value is

[0107] 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 in combination with the current operating status, and control it in combination with the battery available score of the new energy sub-module and the sub-module available score, 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.

[0108] The above 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 in combination with the power demand parameters of the power grid system. After that, in combination with the operating state of the power grid system, a control strategy is determined to control the switching operation of each new energy sub-module in the new energy storage system. In this way, the switching operation of the new energy sub-module of the new energy storage system can be automatically matched and controlled in combination with the operating state of the power grid system, which can be achieved without manual operation, thereby alleviating the problem of low scheduling efficiency of the new energy storage system.

[0109] See also Figure 4 In some embodiments, the operating state includes power absorption operation, and step 206 includes step 302 and step 304 .

[0110] 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 submodule are obtained.

[0111] Step 304 , according to the power demand parameter and the output state parameter, combined with the battery available score of the new energy submodule and the submodule available score, the new energy submodule is controlled to switch on and off.

[0112] Specifically, the output state parameter is a parameter related to the operating state of the new energy power generation module when the new energy power generation module outputs electric energy to the battery module of the new energy submodule and / or the power grid system. It should be pointed out that the specific type of the output state parameter is not unique, as long as it can reasonably characterize the output operating state of the new energy power generation module, for example, in a more detailed embodiment, the output state parameter includes output current or output power, which can be selected in combination with actual needs.

[0113] It can be understood that in a more detailed embodiment, the output state parameter and the power requirement parameter should be of the same type, that is, if the output state parameter used is the output power, the corresponding power requirement parameter should also be a power parameter.

[0114] The control device is not limited to the way in which it determines the operating state of the power grid system based on the power demand parameter. Depending on the power demand parameter, the determination method may also be different. For example, if the power demand parameter is a power parameter, it is necessary to determine that the power grid system is absorbing power when the power parameter is greater than zero. If the power demand parameter is a current parameter, it is necessary to determine that the power grid system is absorbing power when the current parameter is greater than zero.

[0115] 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 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.

[0116] The above scheme, when the power grid system is in the absorption power 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 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 is absorbed.

[0117] See also Figure 5 , in some embodiments, step 304 includes step 402.

[0118] Step 402, when the power demand parameter is not equal to the output state parameter, the current new energy submodule is controlled to switch 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.

[0119] Specifically, the scheme of the embodiment of the present application requires the use of an energy storage operation method to control the switching of each new energy sub-module. Whenever the switching control of a new energy sub-module is completed, the control device returns to the operation of determining the operating state of the power grid system according to the power demand parameters of the power grid system, and repeats the energy storage operation method to control the switching of 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. In the case of 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.

[0120] In the above scheme, when the switching control of the new energy sub-module is performed according to the power demand parameter and the output state parameter, if the power demand parameter is not equal to the output state parameter, it is necessary to further combine the battery available score of the current new energy sub-module and the sub-module available score 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.

[0121] See also Figure 6 In some embodiments, the operating state includes power generation operation, and step 206 includes step 502 .

[0122] Step 502, when the power grid system is in power generation operation, the current new energy submodule is controlled to switch on and off according to the battery available score and submodule available score corresponding to the current new energy submodule of the new energy storage system.

[0123] Specifically, the control device is not limited to a single method for determining the operating state of the power grid system based on the power demand parameter. Depending on the power demand parameter, the determination method may also differ to a certain extent. For example, if the power demand parameter is a power parameter, it is necessary to determine that the power grid system is emitting power when the power parameter is less than or equal to zero. If the power demand parameter is a current parameter, it is necessary to determine that the power grid system is emitting power when the current parameter is less than or equal to zero.

[0124] 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.

[0125] 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.

[0126] Whether it is running in power generation or power absorption mode, the control device controls the switching of the current new energy submodule in a similar manner according to the available scores of the submodule and the available scores of the battery. Figure 7 In some embodiments, according to the battery available score and the submodule available score corresponding to the current new energy submodule of the new energy storage system, the current new energy submodule is controlled to be switched on and off, including step 601, step 602, step 603, step 604, step 605 and step 606.

[0127] Step 601: Obtain the submodule available score corresponding to the current new energy submodule of the new energy storage system.

[0128] Step 602: When the submodule availability score is zero, the number of available submodules of the new energy storage system is reduced by one.

[0129] 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.

[0130] Step 604: Obtain the battery availability score corresponding to the current new energy submodule of the new energy storage system.

[0131] Step 605 , when the battery available score is not zero, control the new energy power generation module of the current new energy submodule to charge the battery module of the current new energy submodule.

[0132] Step 606, when the battery available score is zero, control the new energy power generation module to abandon power operation.

[0133] Specifically, the number of available submodules is the number of new energy submodules that can be put into operation in the new energy energy storage system. Cutting out operation means controlling the current new energy submodule to exit the new energy energy storage system, which can be achieved by controlling the on and off of the switching devices (such as IGBT, insulated gate bipolar transistor) of the power module in the current new energy submodule. For ease of understanding, taking the current new energy submodule as an example, in which the power module is a half-bridge structure, when it is put into operation, only the upper tube of the power module is turned on and the lower tube is turned off; and when it is cut out of operation, only the lower tube of the power module is turned on and the upper tube is turned off.

[0134] The required number of inputs is the number of new energy submodules that need to be put into operation when the power grid system is running in the current state. The required number of inputs can be calculated in combination with the voltage demand of the power grid system, and there is no specific limit. Abandoned operation refers to being forced to abandon new energy power generation due to some reasons, stopping the corresponding generator set or reducing its power generation. It can be abandoned wind, abandoned solar, etc., and it will also be different in combination with different new energy power generation modules.

[0135] The control device assumes by default that all new energy sub-modules can be put into operation. 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.

[0136] The control method of this embodiment is applicable to the power grid system emitting power and absorbing power. 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. Furthermore, in order to reduce the situation of energy abandonment operation of the new energy storage system, the control device will obtain the battery available score of the current new energy sub-module to 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.

[0137] The above scheme can determine the number of available submodules according to the available submodule score of the current new energy submodule, control the switching of the current new energy submodule according to the available submodule score and the required input quantity, and control the operation of the new energy power generation module according to the available battery score of the current new energy submodule. When the current new energy submodule is switched out, the new energy power generation module of the new energy submodule can be used to charge the battery module of the new energy submodule, so as to maximize the operation of the new energy power generation module without abandoning energy.

[0138] See also Figure 8 In some embodiments, after step 601 , the method further includes steps 702 and 704 .

[0139] Step 702: When the submodule availability score is not zero, the number of available submodules of the new energy storage system is maintained unchanged.

[0140] 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.

[0141] Specifically, putting into operation means connecting the new energy submodule to the new energy storage system for operation. When the control device analyzes that the available score of the submodule is not zero, it means that the current new energy submodule can be put into operation in the new energy storage system. In the current state, if it is detected that the number of available submodules is greater than the required number of submodules, the current new energy submodule is directly put into operation in the new energy storage system, and the energy storage operation control ends.

[0142] In the above scheme, when the submodule available score of the current new energy submodule is not zero, the number of available submodules is maintained unchanged, and the input control of the current new energy submodule is performed, so that the output of the new energy power generation module is consistently in the maximum power tracking state, thereby improving the utilization rate of the new energy power generation module.

[0143] See also Fig. 9In 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.

[0144] Step 802: When the number of available submodules is less than or equal to the required number of submodules, a power increase operation request is output. When a determination instruction returned according to the power increase operation request is received, the step of determining the operation state of the power grid system according to the power demand parameter of the power grid system is returned.

[0145] Specifically, the power increase operation request is a request for the power grid system to increase power operation. Fig.10 In the solution of this embodiment, when the number of available new energy sub-modules is less than the required number, it means that even if the current new energy sub-module is put into operation, the electric energy provided by the new energy storage system to the power grid system cannot be completely 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-combining the power demand parameters to judge the operating status, and control the switching of the current new energy sub-module.

[0146] In the above scheme, when the power grid system absorbs 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 of input modules, it means that even if the current new energy submodule is put into operation, the output of the new energy power generation module will be excessive. At this time, a power increase operation request will be output to make the power grid system increase power operation, consume the electric energy output by the new energy power generation module, and improve the utilization rate of electric energy.

[0147] See also Fig. 9 In some embodiments, after step 802 , the method further includes step 804 .

[0148] Step 804, when no confirmation instruction returned according to the power increase operation request is received, 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.

[0149] Specifically, the scheme of the embodiment of the present application, when the output of the new energy power generation module is too much, preferentially requests the power grid system to increase the power operation to consume the excess electric energy. If the power grid system does not agree to increase the power operation, that is, it does not receive the confirmation instruction returned according to the request for increasing the power operation, in order to reduce the waste of electric energy, the scheme of this embodiment, the control device controls the new energy power generation module to reduce the load operation, and finally 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 execute the operation of determining the operating state of the power grid system according to the power demand parameter of the power grid system, and re-judge the operating state of the energy storage system.

[0150] In the above scheme, if the power grid system does not agree to the output power increase operation request, 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 operating safety of the new energy storage system.

[0151] See also 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.

[0152] Step 1002: When the number of available submodules is less than or equal to the required number of submodules, a power reduction operation request is output. When a determination instruction returned according to the power reduction operation request is received, the step of determining the operation state of the power grid system according to the power demand parameter of the power grid system is returned.

[0153] Specifically, the power reduction operation request is a request for the power grid system to reduce power operation. Fig.12 In the solution of this embodiment, when the number of available new energy submodules is less than the required number, it means that even if the current new energy submodules are put into operation, the electric energy provided by the new 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 the consumption of electric energy. 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 according to the power demand parameters of the power grid system, and re-combine the power demand parameters to determine the operating status.

[0154] In the above scheme, when the power grid system absorbs 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 of input modules, it means that even if the current new energy submodule is put into operation, the output of the new energy power generation module cannot meet the demand. At this time, a power reduction operation request will be output to reduce the power of the power grid system, reduce the consumption of the output power of the new energy power generation module, and improve the operation reliability of the new energy storage system.

[0155] Please refer to Fig.11 In some embodiments, after step 1002, the method further includes step 1003, step 1004, step 1005 and step 1006.

[0156] Step 1003: When no confirmation instruction returned according to the power reduction operation request is received, the new energy storage system is controlled to be locked.

[0157] Step 1004, obtaining the battery available score corresponding to the current new energy sub-module.

[0158] Step 1005 , when the battery available score is not zero, control the new energy power generation module of the current new energy submodule to charge the battery module of the current new energy submodule.

[0159] Step 1006, when the battery available score is zero, control the new energy power generation module to abandon power operation.

[0160] Specifically, in the solution of this embodiment, when the output of the new energy power generation module cannot meet the needs of the power grid system, the power grid system is preferentially requested to reduce power. If the power grid system does not agree to reduce power, that is, it does not receive a confirmation instruction returned according to the power reduction operation request, in the solution of this embodiment, the control device controls the new energy storage system to be directly locked.

[0161] After that, in order to minimize the occurrence of the situation where the new energy generation module abandons energy, the control device will judge 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 electric energy to charge the battery module of the current new energy submodule; if the battery module is not available (including the situation where the battery module is fully charged), the new energy generation module will be controlled to abandon energy.

[0162] In the above scheme, if the power grid system does not agree to the output power reduction operation request, the new energy storage system will be controlled to be locked, thereby improving the operation safety of the new energy storage system. By further analyzing the available value of the current new energy submodule battery, the new energy power generation module is used to charge the battery module of the new energy submodule, so as to maximize the operation of the new energy power generation module without abandoning energy.

[0163] See also Fig.13 , in some embodiments, step 304 also includes step 122.

[0164] 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.

[0165] Specifically, in the solution of this embodiment, after obtaining the power demand parameter and the output state parameter, the control device will judge the size of the two. If the power demand parameter is smaller than the output state parameter, the following is executed: Fig.10 If the power demand parameter is greater than the output state parameter, the control strategy shown in FIG. Fig.12 When the power demand parameter is equal to the output state parameter, there is no need to further analyze the new energy submodule, and the current new energy submodule can be directly controlled to be put into operation, and the new energy power generation module can be used to supply energy to the power grid system.

[0166] 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 electric energy to the power grid system, thereby improving the utilization rate of the new energy power generation module.

[0167] See also 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.

[0168] Step 132: When the number of available submodules is less than or equal to the required number of input modules, a control strategy change request is output. When a confirmation instruction is received based on the control strategy change request feedback, the step of obtaining the output state parameter of the new energy power generation module of the new energy submodule is returned.

[0169] Specifically, the control strategy change request is a signal requesting to change the switching strategy of the new energy submodule of the new energy storage system. In the solution of this embodiment, when the power grid system is in the state of generating power, if it is detected that the number of available submodules is less than or equal to the required number of input modules, the control device will request to change the control strategy, that is, to change to the control strategy corresponding to the state of the power grid system in the state of absorbing power operation, specifically, according to the size relationship between the output state parameter and the operating state parameter, the submodule available score of the current new energy submodule and the battery available score perform the corresponding switching control.

[0170] In the above scheme, when operating under power generation, 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, and the output state parameters of the new energy power generation module of the new energy storage system connected to the power grid system will be obtained according to the received confirmation instruction. That is, the switching control will be carried out according to the control strategy under the power absorption operation, so as to improve the operation reliability of the new energy storage system.

[0171] See also Fig.14 In some embodiments, after step 132, the method further includes step 133, step 134, step 135 and step 136.

[0172] Step 133: When no confirmation instruction is received according to the feedback of the control strategy change request, the new energy storage system is controlled to be locked.

[0173] Step 134, obtaining the battery available score corresponding to the current new energy submodule.

[0174] 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.

[0175] Step 136, when the battery available score is zero, control the new energy power generation module to abandon power operation.

[0176] Specifically, please refer to Fig.15 In the solution of this embodiment, if there is no agreement to change the control strategy (that is, if no confirmation instruction is received based on the feedback of the control strategy change request), 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, 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 electrical 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 new energy power generation module will be executed.

[0177] In the above scheme, if the output control strategy change request is not approved, the new energy storage system is controlled to be locked, thereby improving the operational safety of the new energy storage system. By further analyzing the available value of the current new energy submodule battery, the new energy power generation module is used to charge the battery module of the new energy submodule, so as to maximize the possibility of the new energy power generation module not abandoning energy and operating.

[0178] In some examples, the method for determining the battery usable score includes: performing a weighted analysis according to at least one of the battery state of charge, battery power capability parameter, and battery health status of the current new energy submodule to determine the battery usable score.

[0179] Specifically, the 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 rated power and the battery maximum output power, etc., without specific limitation. The method for determining the battery usable score is not unique, as long as the battery parameters are of the type that will change during the charging and discharging process. The solution of this embodiment performs weighted calculation based on one or more of the battery state of charge, battery power capability parameters and battery health status to ultimately determine the battery usable score.

[0180] The above scheme 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 available score, so that the battery available score matches the current new energy sub-module, thereby improving the accuracy of the battery available score.

[0181] 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.

[0182] Specifically, 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, which may include current output power parameters, output power parameters that can be achieved under different environmental conditions, or output power parameters predicted at future times in combination with the current environment, etc., without specific limitation.

[0183] The scheme 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 according to the power demand parameter and the output state parameter. Specifically, the method for determining the charge and discharge battery demand parameter will be different according to the different charge and discharge states 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 charging and discharging battery demand parameters are determined in the following ways: bat =I renew -(-|I sys |).

[0184] 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 available score of the sub-module.

[0185] It is understandable that the weighted calculation method of the available scores of the submodules is not unique. In one embodiment, 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 may 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.

[0186] 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 may be selected and calculated using a weighted analysis method similar to that described above, which will not be repeated here.

[0187] 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 calculation to obtain the available score of the submodule, so that the available score of the submodule is more matched with the new energy storage system, thereby improving the accuracy of the available score of the submodule.

[0188] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0189] 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.

[0190] See also Fig.10 , Fig.12 , Fig.15 and Fig.16 First, the control device obtains the power demand parameters of the power grid system (including power parameters P sys and current parameter I sys ), in order to judge the operating state 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.

[0191] When the power grid system absorbs power and operates, 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.

[0192] 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 parameter 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 parameter, 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

[0193] Afterwards judgement 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 It will be reduced by one on the original basis, that is, N able =N able -1. Then determine the updated N able Is it greater than the required input quantity N? ref (It can be calculated in combination with the current voltage demand). able >N ref, the current new energy submodule is switched out for operation, and further a 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.

[0194] 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 submodule 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.

[0195] 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 submodule. If the power grid system disagrees, it is necessary to control the new energy power generation module to reduce 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.

[0196] 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 Calculate the available submodule score of the current new energy submodule (The specific calculation method is consistent with the above, so I will not repeat it here.) 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 It will be reduced by one on the original basis, that is, N able =N able -1. Then determine 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. (The calculation method is similar to the above, so I won’t repeat it 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.

[0197] 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 battery module of the current new energy sub-module at the same time.

[0198] 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 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 submodule. If the power 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, so I won’t repeat it 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.

[0199] 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 consistent with the above, so I will not repeat it here.) 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 It will be reduced by one on the original basis, that is, N able =N able -1. Then determine 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. (The calculation method is similar to the above, so I won’t repeat it 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] 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 battery module of the current new energy sub-module at the same time.

[0201] 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 ①, then jump to ① to obtain the output state parameters of the new energy power generation module. If you do not agree to change to 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, so I won’t repeat it 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.

[0202] Based on the same inventive concept, the embodiment of the present application also provides an energy storage operation device for implementing the energy storage operation method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more energy storage operation embodiments provided below can refer to the limitations of the energy storage operation method above, and will not be repeated here.

[0203] See also Fig.17 The present application also provides an energy storage operation device, including: an operation determination module 162 and a switching control module 166 .

[0204] The operation determination module 162 is 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 166 is used to control the switching operation of the new energy sub-module of the new energy storage system connected to the power grid system according to the operation state, combined with the battery available score of the new energy sub-module and the sub-module available score.

[0205] 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 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 of the new energy sub-module and the sub-module available score, the switching operation of the new energy sub-module of the new energy storage system is controlled.

[0206] 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 storage system when the power demand parameter is not equal to the output state parameter.

[0207] 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 the sub-module available score corresponding to the current new energy sub-module of the new energy storage system when the power grid system is in power generation operation.

[0208] 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 for operation; the battery available score corresponding to the current new energy submodule of the new energy storage system is obtained; 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.

[0209] 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 available score of the submodule 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.

[0210] In some embodiments, the switching control module 166 is further configured to output a power increase 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 according to the power increase operation request, the control operation determination module 162 performs an operation of determining the operation state of the power grid system according to the power demand parameters of the power grid system.

[0211] 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 reduce load operation until the output state parameter is less than or equal to the power demand parameter when no confirmation instruction returned according to the power increase operation request is received.

[0212] In some embodiments, the 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 according to the power reduction operation request, the control operation determination module 162 performs an operation of determining the operation state of the power grid system according to the power demand parameters of the power grid system.

[0213] 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 according to 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.

[0214] In some embodiments, the switching control module 166 is further used 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.

[0215] 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 feedback, the control operation determination module 162 performs an operation of determining the operation state of the power grid system based on the power demand parameters of the power grid system.

[0216] 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.

[0217] The above-mentioned energy storage operation device, 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 in combination with the power demand parameters of the power grid system. After that, in combination with the operating state of the power grid system, a control strategy is determined to control the switching operation of each new energy sub-module in the new energy storage system. In this way, the switching operation of the new energy sub-module of the new energy storage system can be automatically matched and controlled in combination with the operating state of the power grid system, which can be achieved without manual operation, thereby alleviating the problem of low scheduling efficiency of the new energy storage system.

[0218] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.18As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through 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 can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, a trackball or a touch pad set on the computer device housing, or an external keyboard, touch pad or mouse, etc.

[0219] Those skilled in the art will understand that Fig.18 The structure shown in the figure is only a block diagram of a part 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 those shown in the figure, or combine certain components, or have a different arrangement of components.

[0220] 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:

[0221] 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.

[0222] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0223] 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.

[0224] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0225] 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.

[0226] The above-mentioned computer equipment, storage medium and computer program product, 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 in combination with the power demand parameters of the power grid system. After that, in combination with the operating state of the power grid system, a control strategy is determined to control the switching operation of each new energy sub-module in the new energy storage system. In this way, the switching operation of the new energy sub-module of the new energy storage system can be automatically matched and controlled in combination with the operating state of the power grid system, which can be achieved without manual operation, thereby alleviating the problem of low scheduling efficiency of the new energy storage system.

[0227] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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, characterized in that: It includes a control device and a new energy submodule, the new energy submodule includes a power module, a battery module and a new energy power generation module, 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: include: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 18, characterized in that: 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, characterized in that: include: 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, characterized in that: When the processor executes the computer program, the steps of the energy storage operation method described in any one of claims 6 to 20 are implemented.

23. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the energy storage operation method described in any one of claims 6 to 20 are implemented.

24. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the energy storage operation method described in any one of claims 6 to 20 are implemented.

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