Fault processing method and device, computer equipment, storage medium and program product

Abstract

The invention relates to a fault processing method and device, computer equipment, a storage medium and a program product. The method comprises the steps that in the operation process of the energy storage system, under the condition that a fault energy storage module exists in an energy storage unit of the energy storage system, the fault energy storage module is isolated, and under the condition that the fault energy storage module is isolated, the fault energy storage module is isolated; and controlling the power difference value between any two phases of energy storage units in the phases of energy storage units of the energy storage system not to be greater than the preset power difference value, thereby realizing seamless isolation of the fault sub-module in the operation process of the energy storage system, realizing power balance among the phases of energy storage units of the energy storage system, and improving the operation safety of the whole energy storage system.

Description

Technical Field

[0001] The present application relates to the technical field of fault handling for energy storage systems, and particularly to a fault handling method, device, computer device, storage medium, and program product. Background Art

[0002] An energy storage system includes a three-phase energy storage unit. Each phase of the energy storage unit may include a plurality of serially connected energy storage modules, and an energy storage module includes a power unit and a battery unit. In the case where a fault occurs in an energy storage module in one or more phases of the energy storage unit, it may affect the safe operation of the entire energy storage system. Therefore, how to improve the safety of the operation of the energy storage system has become a technical problem to be solved urgently. Summary of the Invention

[0003] Based on this, in view of the above technical problems, it is necessary to provide a fault handling method, device, computer device, storage medium, and program product that can improve the safety of the operation of the energy storage system.

[0004] In a first aspect, the present application provides a fault handling method. The method includes:

[0005] During the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, isolate the faulty energy storage module;

[0006] When the faulty energy storage module is isolated, control the power difference between any two of the three-phase energy storage units of the energy storage system to be not greater than a preset power difference.

[0007] The fault handling method provided by the embodiments of the present application, during the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, isolates the faulty energy storage module, thereby achieving seamless isolation of the faulty sub-module during the operation of the energy storage system. By controlling the power difference between any two of the three-phase energy storage units of the energy storage system to be not greater than a preset power difference when the faulty energy storage module is isolated, the power balance between the three-phase energy storage units of the energy storage system is achieved, and the operation safety of the entire energy storage system is improved.

[0008] In one of the embodiments, isolating the faulty energy storage module includes:

[0009] Reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module;

[0010] If the fault of the faulty energy storage module is not solved, isolate the faulty energy storage module.

[0011] The fault handling method provided by the embodiments of the present application reduces the power of the faulty energy storage module to resolve the fault as early as possible and reduce the impact of the faulty energy storage module on the operation safety of the entire energy storage system. And when the fault of the faulty energy storage module with reduced power is not resolved, the faulty energy storage module is isolated, thereby reducing the number of times of isolating the faulty energy storage module.

[0012] In one embodiment, the method further includes: turning on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module.

[0013] The fault handling method provided by the embodiments of the present application turns on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module, thereby reducing the impact of the faulty energy storage module on the operation safety of the entire energy storage system.

[0014] In one embodiment, the method further includes:

[0015] Closing the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0016] The fault handling method provided by the embodiments of the present application turns on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module and closes the bypass switch in the faulty energy storage module to bypass the faulty energy storage module, thereby reducing the impact of the faulty energy storage module on the operation safety of the entire energy storage system.

[0017] In one embodiment, the method further includes:

[0018] Disconnecting the isolation switch of the battery unit in the faulty energy storage module.

[0019] The fault handling method provided by the embodiments of the present application turns on the thyristor in the faulty energy storage module and closes the bypass switch in the faulty energy storage module, thereby reducing the impact of the faulty energy storage module on the operation safety of the entire energy storage system. And by disconnecting the isolation switch of the battery unit in the faulty energy storage module, an open circuit of the faulty energy storage module is achieved, improving the safety of repairing the faulty energy storage module.

[0020] In one embodiment, controlling the power difference between any two of the phase energy storage units in the energy storage system to be not greater than a preset power difference includes:

[0021] Reducing the power of the other phase energy storage units to control the power difference between any two of the phase energy storage units to be not greater than a preset power difference;

[0022] Wherein, the other phase energy storage units include the energy storage units other than the faulty phase energy storage unit in each phase energy storage unit, and the faulty phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0023] The fault handling method provided by the embodiment of the present application reduces the power of the energy storage units other than the faulty energy storage unit in the energy storage system when isolating the faulty energy storage module, so as to improve the power balance among the three-phase energy storage units of the energy storage system when isolating the faulty energy storage module.

[0024] In one embodiment, the method further includes:

[0025] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit;

[0026] Control the power of each phase energy storage unit to be restored to the first preset power.

[0027] The fault handling method provided by the embodiment of the present application, if the fault of the faulty energy storage module has been resolved, controls the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit, and controls the power of each phase energy storage unit to be restored to the first preset power, so as to implement a measure for reducing the power of other phase energy storage units to achieve three-phase power balance, provides a power restoration method, and realizes seamless restoration of the power of each phase energy storage unit.

[0028] In one embodiment, controlling the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit includes:

[0029] Reduce the power of each phase energy storage unit;

[0030] When the power of each phase energy storage unit is reduced, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit.

[0031] The fault handling method provided by the embodiment of the present application reduces the power of each phase energy storage unit, and when the power of each phase energy storage unit is reduced, controls the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit, thereby improving the safety when connecting the faulty energy storage module with the resolved fault.

[0032] In one embodiment, controlling the power difference between any two of the three-phase energy storage units of the energy storage system to be not greater than a preset power difference includes:

[0033] Control the standby energy storage module to be connected to the faulty-phase energy storage unit, and control the power of the faulty-phase energy storage unit to be restored to the first preset power, so as to control the power difference between any two of the three-phase energy storage units to be not greater than the preset power difference; wherein, the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0034] The fault handling method provided by the embodiment of the present application controls the access of the standby energy storage module to the energy storage unit of the faulty phase and controls the power of the energy storage unit of the faulty phase to be restored to the first preset power, so as to control the power difference between any two of the energy storage units of each phase to be not greater than the preset power difference, thereby improving the power balance between the three-phase energy storage units of the energy storage system in the case of isolating the faulty energy storage module.

[0035] In one embodiment, the method further includes:

[0036] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the fault resolved to access the energy storage unit of the faulty phase, and control the standby energy storage module to cut out from the energy storage unit of the faulty phase;

[0037] Control the power of each phase of the energy storage unit to be restored to the first preset power.

[0038] The fault handling method provided by the embodiment of the present application controls the faulty energy storage module with the fault resolved to access the energy storage unit of the faulty phase, controls the standby energy storage module to cut out from the energy storage unit of the faulty phase, and controls the power of each phase of the energy storage unit to be restored to the first preset power, thereby implementing a measure to control the access of the standby energy storage module to the energy storage unit of the faulty phase to improve the three-phase power balance, and providing a power restoration method to achieve seamless power restoration of each phase of the energy storage unit.

[0039] In one embodiment, controlling the faulty energy storage module with the fault resolved to access the energy storage unit of the faulty phase, and controlling the standby energy storage module to cut out from the energy storage unit of the faulty phase includes:

[0040] Reduce the power of each phase of the energy storage unit;

[0041] When the power of each phase of the energy storage unit is reduced, control the faulty energy storage module with the fault resolved to access the energy storage unit of the faulty phase, and control the standby energy storage module to cut out from the energy storage unit of the faulty phase.

[0042] The fault handling method provided by the embodiment of the present application reduces the power of each phase of the energy storage unit, and when the power of each phase of the energy storage unit is reduced, controls the faulty energy storage module with the fault resolved to access the energy storage unit of the faulty phase, and controls the standby energy storage module to cut out from the energy storage unit of the faulty phase, thereby improving the safety when accessing the faulty energy storage module with the fault resolved and cutting out the standby energy storage module.

[0043] In one embodiment, the method further includes:

[0044] If the fault of the faulty energy storage module has been resolved, use the faulty energy storage module with the fault resolved as the standby energy storage module.

[0045] The fault handling method provided by the embodiments of the present application, when the fault of a faulty energy storage module has been resolved, uses the faulty energy storage module with the resolved fault as a standby energy storage module, thereby achieving a method for controlling the access of the standby energy storage module to the faulty-phase energy storage unit to improve the three-phase power balance, providing a simple and fast handling method, facilitating the access of the faulty energy storage module with the resolved fault to the faulty-phase energy storage unit after a subsequent energy storage module fails, so as to improve the power balance of each phase of the energy storage unit.

[0046] In a second aspect, the present application also provides a fault handling device. The device includes:

[0047] An isolation module, configured to isolate a faulty energy storage module when there is a faulty energy storage module in the energy storage unit of the energy storage system during the operation of the energy storage system;

[0048] A control module, configured to control the power difference between any two of the energy storage units in each phase of the energy storage system not to exceed a preset power difference when isolating the faulty energy storage module.

[0049] In a third aspect, the present application also provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of the method provided by the above embodiments are implemented.

[0050] In a fourth aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method provided by the above embodiments are implemented.

[0051] In a fifth aspect, the present application also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the method provided by the above embodiments are implemented.

[0052] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically describes the embodiments of the present application. Description of the Drawings

[0053] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0054] Figure 1It is an application environment diagram of the fault handling method provided by the embodiments of the present application;

[0055] Figure 2 It is a schematic flowchart of a fault handling method provided by the embodiments of the present application;

[0056] Figure 3 It is a schematic flowchart of the fault energy storage module isolation method provided by the embodiments of the present application;

[0057] Figure 4 It is an electrical structure diagram of the energy storage module provided by the embodiments of the present application;

[0058] Figure 5 It is one of the schematic flowcharts of the recovery method provided by the embodiments of the present application;

[0059] Figure 6 It is a schematic flowchart of the fault energy storage module access method provided by the embodiments of the present application;

[0060] Figure 7 It is the second schematic flowchart of the recovery method provided by the embodiments of the present application;

[0061] Figure 8 It is a schematic flowchart of the fault energy storage module access and standby energy storage module cut-out method provided by the embodiments of the present application;

[0062] Figure 9 It is a schematic flowchart of another fault handling method provided by the embodiments of the present application;

[0063] Figure 10 It is a schematic structural diagram of a fault handling device provided by the embodiments of the present application;

[0064] Figure 11 It is an internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0065] Next, the embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled 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" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0067] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0068] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0069] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0070] In the description of the embodiments of the present application, the term "a plurality" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of pieces" refers to more than two pieces (including two pieces).

[0071] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0072] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0073] The energy storage system includes a three-phase energy storage unit. Each phase of the energy storage unit may include multiple serially connected energy storage modules, and each energy storage module includes a power unit and a battery unit. In the case where a fault occurs in the energy storage module in one or more phases of the energy storage unit, it may affect the safe operation of the entire energy storage system. Therefore, how to improve the operation safety of the energy storage system has become a technical problem to be solved urgently.

[0074] To solve the above technical problem, an embodiment of the present application provides a fault handling method, which can be applied to an environment as Figure 1 shown in Figure 1 This is an application environment diagram of the fault handling method provided by the embodiment of the present application. Among them, the energy storage system includes an energy storage device 11 and a controller 12. The energy storage device 11 includes a phase-A energy storage unit 111, a phase-B energy storage unit 112, and a phase-C energy storage unit 113. During the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, the controller 12 isolates the faulty energy storage module; in the case of isolating the faulty energy storage module, the controller 12 controls the power difference between any two of the energy storage units in each phase of the energy storage system not to exceed a preset power difference; the faulty-phase energy storage unit includes the faulty energy storage module. Thus, during the operation of the energy storage system, seamless isolation of the faulty sub-module is achieved, and power balance between the energy storage units in each phase of the energy storage system is achieved, improving the operation safety of the entire energy storage system.

[0075] Referring to Figure 2 , Figure 2 This is a schematic flowchart of a fault handling method provided by an embodiment of the present application. The method can be applied to a controller as Figure 1 shown, and the method may include the following steps S201 - S202.

[0076] S201, during the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, isolate the faulty energy storage module.

[0077] The energy storage system may include a three-phase energy storage unit. Each phase of the energy storage unit may include a plurality of serially connected energy storage modules. If there are faulty energy storage modules in one or more phases of the energy storage unit, the faulty energy storage modules in one or more phases of the energy storage unit can be isolated. Among them, the faulty energy storage module refers to an energy storage module with a fault. Exemplarily, if the energy storage unit of phase A includes serially connected energy storage modules A1, A2,..., A10, the energy storage unit of phase B includes serially connected energy storage modules B1, B2,..., B10, and the energy storage unit of phase C includes serially connected energy storage modules C1, C2,..., C10. Among them, if the energy storage module A2 is a faulty energy storage module, the energy storage module A2 can be isolated. If the energy storage modules A2 and B1 are faulty energy storage modules, the energy storage modules A2 and B1 can be isolated.

[0078] S202, in the case of isolating the faulty energy storage module, control the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference.

[0079] Since there is a problem of power imbalance in the three-phase energy storage unit in the case of isolating the faulty energy storage module, therefore, the controller can control the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference, so as to achieve the balance between the powers of the three-phase energy storage units.

[0080] In a possible implementation, the power of other phase energy storage units can be reduced to control the power difference between any two of the energy storage units in each phase of the energy storage unit to be not greater than a preset power difference. Among them, the other phase energy storage units include the energy storage units in each phase except the faulty phase energy storage unit, and the faulty phase energy storage unit refers to the energy storage unit where the faulty energy storage module is located.

[0081] Exemplarily, if the energy storage unit of phase A is the faulty phase energy storage unit, the powers of the energy storage units of phase B and phase C can be reduced, so as to control the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference.

[0082] In another possible implementation, it is possible to control the standby energy storage module to be connected to the faulty phase energy storage unit and control the power of the faulty phase energy storage unit to be restored to a first preset power, so as to control the power difference between any two of the energy storage units in each phase of the energy storage unit to be not greater than a preset power difference. It is possible to control the standby energy storage module to replace the faulty energy storage module and be connected to the faulty phase energy storage unit, and restore the power of the faulty phase energy storage unit to the first preset power, so as to achieve the control that the power difference between any two of the energy storage units in each phase of the energy storage unit is not greater than a preset power difference.

[0083] Exemplarily, when the energy storage system is operating and there is no faulty energy storage module, the energy storage modules connected to the energy storage unit of phase A include energy storage modules A1 to A9, and the standby energy storage module is energy storage module A10, which is not connected to the energy storage unit of phase A at this time. Subsequently, during the operation of the energy storage system, if energy storage module A1 in the energy storage unit of phase A fails, that is, the faulty energy storage module is energy storage module A1, then while isolating energy storage module A1, energy storage module A10 can be controlled to be connected to the energy storage unit of phase A, and the power of the energy storage unit of phase A can be controlled to be restored to the first preset power, so as to control the power difference between any two of the energy storage units of each phase not to exceed the preset power difference.

[0084] The fault handling method provided by the embodiments of the present application isolates the faulty energy storage module when there is a faulty energy storage module in the energy storage unit of the energy storage system during the operation of the energy storage system, thereby achieving seamless isolation of the faulty sub-module during the operation of the energy storage system. By controlling the power difference between any two of the energy storage units of each phase of the energy storage system not to exceed the preset power difference while isolating the faulty energy storage module, the power balance between the energy storage units of each phase of the energy storage system is achieved, and the operation safety of the entire energy storage system is improved.

[0085] In one embodiment, as Figure 3 shown, Figure 3 is a schematic flowchart of a method for isolating a faulty energy storage module provided by the embodiments of the present application. This embodiment relates to a possible implementation manner of how to isolate a faulty energy storage module. On the basis of the above embodiment, "isolating the faulty energy storage module" in S201 above may include the following steps S301 - S302:

[0086] S301, reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module.

[0087] As Figure 4 shown, Figure 4It is the electrical structure diagram of the energy storage module provided by the embodiment of the present application. The energy storage module is electrically connected to the support platform. The energy storage module includes a power unit 401 and a battery unit 402, and the power unit 401 is connected to the battery unit 402. The power unit 401 includes an Insulated Gate Bipolar Transistor (IGBT), a thyristor 4011, a bypass switch 4012, a first resistor R1, a second resistor R2, a capacitor C, a first inductor L1, and a second inductor L2. Among them, the IGBT includes a first insulated gate bipolar transistor T1, a second insulated gate bipolar transistor T2, a third insulated gate bipolar transistor T3, and a fourth insulated gate bipolar transistor T4. The battery unit 402 includes a battery 4021, a first fuse FU1, a second fuse FU2, a first relay K1, a second relay K2, a third relay K3, a first disconnecting switch K4, a second disconnecting switch K5, and a resistor R3.

[0088] Since the failure of the energy storage module may be caused by the excessive power of the energy storage module, if a certain energy storage module fails, the power of the IGBT in the power unit 401 of the energy storage module can be reduced, the power of the faulty energy storage module can be reduced, thereby reducing the power of the faulty phase energy storage unit where the faulty energy storage module is located, and thus reducing the probability that the faulty energy storage module affects the entire energy storage system, and solving the failure of the faulty energy storage module.

[0089] S302, if the failure of the faulty energy storage module is not solved, isolate the faulty energy storage module.

[0090] If the failure of the faulty energy storage module is not solved after reducing the power of the faulty energy storage module, it is necessary to isolate the faulty energy storage module to reduce the impact of the faulty energy storage module on the operation safety of the entire energy storage system.

[0091] The fault handling method provided by the embodiment of the present application reduces the power of the faulty energy storage module to solve the fault as early as possible and reduce the impact of the faulty energy storage module on the operation safety of the entire energy storage system. And only when the failure of the faulty energy storage module with reduced power is not solved, the faulty energy storage module is isolated, so that the number of times of isolating the faulty energy storage module can be reduced.

[0092] In one embodiment, "isolating the faulty energy storage module" in the above S201 can be implemented in the following manner:

[0093] Turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module.

[0094] Refer to the above Figure 4, if a certain energy storage module fails, the thyristor 4011 in the energy storage module can be turned on to short-circuit the energy storage module, reducing the impact of the energy storage module on the operation safety of the entire energy storage system. And since the current in the energy storage module will not change suddenly after the thyristor is turned on, but will decrease slowly.

[0095] The embodiment of the present application provides a fault handling method. By turning on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module, the impact of the faulty energy storage module on the operation safety of the entire energy storage system can be reduced.

[0096] In one embodiment, "isolating the faulty energy storage module" in the above S201 can be achieved in the following way:

[0097] Turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module, and close the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0098] In this embodiment, the thyristor in the faulty energy storage module can be turned on first, and then the bypass switch in the faulty energy storage module can be closed to bypass the faulty energy storage module, so as to isolate the faulty energy storage module and reduce the impact of the faulty energy storage module on the operation safety of the entire energy storage system. Exemplarily, the bypass switch 4012 in the faulty energy storage module can be closed to bypass the faulty energy storage module. Figure 4 in the above to bypass the faulty energy storage module.

[0099] The fault handling method provided by the embodiment of the present application can reduce the impact of the faulty energy storage module on the operation safety of the entire energy storage system by turning on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module and closing the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0100] In one embodiment, "isolating the faulty energy storage module" in the above S201 can be achieved in the following way:

[0101] Turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module, close the bypass switch in the faulty energy storage module to bypass the faulty energy storage module, and disconnect the isolating switch of the battery unit in the faulty energy storage module.

[0102] In this embodiment, the thyristor in the faulty energy storage module can be turned on first, then the bypass switch in the faulty energy storage module can be closed, and then the isolating switch of the battery unit in the faulty energy storage module can be disconnected. The first isolating switch K4 and the second isolating switch K5 of the battery unit in the faulty energy storage module can be disconnected simultaneously, so as to open the faulty energy storage module and improve the safety of repairing the faulty energy storage module.

[0103] The fault handling method provided by the embodiment of the present application can reduce the impact of the faulty energy storage module on the operation safety of the entire energy storage system by turning on the thyristor in the faulty energy storage module and closing the bypass switch in the faulty energy storage module. And by disconnecting the isolation switch of the battery unit in the faulty energy storage module, the faulty energy storage module is opened to improve the safety of repairing the faulty energy storage module.

[0104] In one embodiment, since the problem of three-phase power imbalance will occur when isolating the faulty energy storage module, therefore, in order to improve the three-phase power balance when isolating the faulty energy storage module, the embodiment of the present application provides an implementation method 1 for improving the three-phase power balance. The "controlling the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference" in the above S202 can be achieved in the following way to improve the three-phase power balance:

[0105] Reduce the power of the energy storage units in other phases to control the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference; wherein, the energy storage units in other phases include the energy storage units other than the faulty-phase energy storage unit in each phase of the energy storage system, and the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0106] Exemplarily, if the energy storage units in phase A and phase B are the faulty-phase energy storage units, the power in the energy storage unit in phase C can be reduced, so as to control the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference.

[0107] The fault handling method provided by the embodiment of the present application reduces the power of the energy storage units other than the faulty-phase energy storage unit when there is a faulty energy storage module in the isolated energy storage system, so as to improve the power balance between the three-phase energy storage units in the energy storage system when isolating the faulty energy storage module.

[0108] In one embodiment, if the above implementation method 1 for improving the three-phase power balance is adopted, that is, when reducing the power of the energy storage units in other phases to control the power difference between any two of the energy storage units in each phase of the energy storage system to be not greater than a preset power difference, then after the fault of the faulty energy storage module is resolved, the following recovery method 1 can be used to recover the power of the energy storage units in each phase of the energy storage system, that is, the recovery method 1 is the corresponding recovery measure for the implementation method 1 for improving the three-phase power balance. It can be referred to Figure 5 , Figure 5 is one of the flow diagrams of the recovery method provided by the embodiment of the present application. This method may include the following steps S501-S502:

[0109] S501. If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase.

[0110] If, by reducing the power of the energy storage units of other phases, the power difference between any two of the energy storage units of each phase is controlled not to exceed the preset power difference, and then if the fault of the faulty energy storage module has been resolved, the faulty energy storage module with the resolved fault can be controlled to be connected to the energy storage unit of the faulty phase.

[0111] The connection of the faulty energy storage module with the resolved fault to the energy storage unit of the faulty phase can be achieved by disconnecting the bypass switch and thyristor in the faulty energy storage module with the resolved fault and closing the disconnector in the faulty energy storage module with the resolved fault.

[0112] S502. Control the power of the energy storage units of each phase to be restored to the first preset power.

[0113] When controlling the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase, the power of the energy storage units of each phase can be controlled to be restored to the first preset power. The first preset power can be the power of the three-phase energy storage unit before the energy storage module fails.

[0114] The fault handling method provided in the embodiments of the present application, by controlling the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase and controlling the power of the energy storage units of each phase to be restored to the first preset power, thereby realizing a measure to reduce the power of the energy storage units of other phases to achieve three-phase power balance, provides a power restoration method to realize seamless restoration of the power of the energy storage units of each phase.

[0115] In one embodiment, as Figure 6 shown, Figure 6 is a schematic flowchart of the method for connecting a faulty energy storage module provided in the embodiments of the present application. This embodiment relates to a possible implementation manner of controlling the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase. On the basis of the above embodiment, "controlling the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase" in the above S501 may include the following steps S601 - S602:

[0116] S601. Reduce the power of the energy storage units of each phase.

[0117] The power of the energy storage units of each phase can be controlled to be reduced to the second preset power within a preset time period, so as to reduce the power of the energy storage units of each phase. Exemplarily, the second preset power can be 0, other values, or a value very close to 0. By reducing the power of the energy storage units of each phase, it is convenient to control the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase.

[0118] S602. When the power of each phase energy storage unit decreases, control the faulty energy storage module with the fault resolved to be connected to the faulty phase energy storage unit.

[0119] The fault handling method provided by the embodiment of the present application reduces the power of each phase energy storage unit and, when the power of each phase energy storage unit decreases, controls the faulty energy storage module with the fault resolved to be connected to the faulty phase energy storage unit, thereby improving the safety when connecting the faulty energy storage module with the fault resolved.

[0120] In one embodiment, since the problem of three-phase power imbalance will occur when isolating the faulty energy storage module, therefore, in order to improve the three-phase power balance when isolating the faulty energy storage module, the embodiment of the present application provides the second implementation method for improving the three-phase power balance. The "control the power difference between any two of the energy storage units in each phase of the energy storage system not to exceed a preset power difference" in the above S202 can be implemented in the following way to improve the three-phase power balance:

[0121] Control the standby energy storage module to be connected to the faulty phase energy storage unit and control the power of the faulty phase energy storage unit to be restored to the first preset power, so as to control the power difference between any two of the energy storage units in each phase not to exceed the preset power difference. It can be controlled that the standby energy storage module replaces the faulty energy storage module and is connected to the faulty phase energy storage unit, and the power of the faulty phase energy storage unit is restored to the first preset power, thereby realizing the control that the power difference between any two of the energy storage units in each phase does not exceed the preset power difference; among them, the faulty phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0122] The fault handling method provided by the embodiment of the present application controls the standby energy storage module to be connected to the faulty phase energy storage unit and controls the power of the faulty phase energy storage unit to be restored to the first preset power, so as to realize the control that the power difference between any two of the energy storage units in each phase does not exceed the preset power difference, thereby improving the power balance between the three-phase energy storage units of the energy storage system when isolating the faulty energy storage module.

[0123] In one embodiment, if the second implementation method for improving the three-phase power balance is adopted, that is, when controlling the standby energy storage module to be connected to the faulty phase energy storage unit and controlling the power of the faulty phase energy storage unit to be restored to the first preset power to control the power difference between any two of the energy storage units in each phase not to exceed the preset power difference, then when the fault of the faulty energy storage module has been resolved, the following recovery method two can be used to recover the power of each phase energy storage unit of the energy storage system, that is, the recovery method two is the corresponding recovery measure for the second implementation method for improving the three-phase power balance. It can be referred to Figure 7, this embodiment provides a power recovery method, which is a recovery method for the strategy of controlling the access of a standby energy storage module to a faulty-phase energy storage unit to improve the power balance of each phase. Figure 7 It is the second flow schematic diagram of the recovery method provided by the embodiment of the present application. This method may include the following steps S701 - S702:

[0124] S701, if the fault of the faulty energy storage module has been resolved, then control the faulty energy storage module with the resolved fault to access the faulty-phase energy storage unit, and control the standby energy storage module to cut out from the faulty-phase energy storage unit.

[0125] If, by controlling the access of the standby energy storage module to the faulty-phase energy storage unit and controlling the power of the faulty-phase energy storage unit to recover to the first preset power, so that the power difference between any two of the energy storage units in each phase is not greater than the preset power difference, and then if the fault of the faulty energy storage module has been resolved, then the faulty energy storage module with the resolved fault can be controlled to access the faulty-phase energy storage unit, and the standby energy storage module can be controlled to cut out from the faulty-phase energy storage unit.

[0126] The standby energy storage module can be cut out from the faulty-phase energy storage unit by disconnecting the bypass switch and thyristor in the standby energy storage module and closing the disconnector in the standby energy storage module.

[0127] S702, control the power of each phase energy storage unit to recover to the first preset power.

[0128] The fault handling method provided by the embodiment of the present application realizes a power recovery method for the measure of controlling the access of the standby energy storage module to the faulty-phase energy storage unit to improve the three-phase power balance by controlling the faulty energy storage module with the resolved fault to access the faulty-phase energy storage unit, controlling the standby energy storage module to cut out from the faulty-phase energy storage unit, and controlling the power of each phase energy storage unit to recover to the first preset power, so as to achieve seamless recovery of the power of each phase energy storage unit.

[0129] In one embodiment, refer to Figure 8 , Figure 8 It is the flow schematic diagram of the method for accessing the faulty energy storage module and cutting out the standby energy storage module provided by the embodiment of the present application. The "controlling the faulty energy storage module with the resolved fault to access the faulty-phase energy storage unit, and controlling the standby energy storage module to cut out from the faulty-phase energy storage unit" in the above S701 may include the following steps S801 - S802.

[0130] S801, reduce the power of each phase energy storage unit.

[0131] The power of each phase energy storage unit can be controlled to decrease to a second preset power within a preset duration, so as to reduce the power of each phase energy storage unit. Exemplarily, the second preset power can be 0, other values, or a value very close to 0. By reducing the power of each phase energy storage unit, it is convenient to control the access of the fault energy storage module with the fault resolved to the fault phase energy storage unit, and to control the standby energy storage module to cut out from the fault phase energy storage unit.

[0132] S802, when the power of each phase energy storage unit decreases, control the access of the fault energy storage module with the fault resolved to the fault phase energy storage unit, and control the standby energy storage module to cut out from the fault phase energy storage unit.

[0133] The fault handling method provided by the embodiments of the present application, by reducing the power of each phase energy storage unit, and when the power of each phase energy storage unit decreases, controlling the access of the fault energy storage module with the fault resolved to the fault phase energy storage unit, and controlling the standby energy storage module to cut out from the fault phase energy storage unit, thereby improving the safety when accessing the fault energy storage module with the fault resolved and cutting out the standby energy storage module.

[0134] In one embodiment, if the second implementation manner for improving the three-phase power balance is adopted, that is, if the standby energy storage module is controlled to access the fault phase energy storage unit, and the power of the fault phase energy storage unit is restored to the first preset power to control the power difference between any two of the three phase energy storage units not to be greater than the preset power difference, then when the fault of the fault energy storage module has been resolved, the following processing method can be adopted to restore the energy storage system, and this processing method is a processing method corresponding to the second implementation manner for improving the three-phase power balance:

[0135] If the fault of the fault energy storage module has been resolved, then use the fault energy storage module with the fault resolved as the standby energy storage module.

[0136] The fault handling method provided by the embodiments of the present application, by using the fault energy storage module with the fault resolved as the standby energy storage module when the fault of the fault energy storage module has been resolved, thereby realizing a simple and fast processing method for the manner of controlling the standby energy storage module to access the fault phase energy storage unit to improve the three-phase power balance, which is convenient for accessing the fault energy storage module with the fault resolved to the fault phase energy storage unit after subsequent energy storage modules fail, so as to improve the power balance of each phase energy storage unit.

[0137] Refer to Figure 9 , Figure 9 is a schematic flowchart of another fault handling method provided by the embodiments of the present application. This method includes the following S901 - S911:

[0138] S901. During the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module.

[0139] If reducing the power fails to solve the fault of the faulty energy storage module, then execute S902, that is, isolate the faulty energy storage module.

[0140] S902. Turn on the thyristor in the faulty energy storage module, close the bypass switch in the faulty energy storage module, and disconnect the isolation switch of the battery unit in the faulty energy storage module to isolate the faulty energy storage module.

[0141] When isolating the faulty energy storage module, S903 or S904 can be executed subsequently.

[0142] S903. Reduce the power of the energy storage units of other phases to control the power difference between any two of the energy storage units in each phase of the energy storage unit not to be greater than a preset power difference.

[0143] S904. Control the standby energy storage module to be connected to the energy storage unit of the faulty phase, and control the power of the energy storage unit of the faulty phase to be restored to the first preset power to control the power difference between any two of the energy storage units in each phase of the energy storage unit not to be greater than a preset power difference.

[0144] After executing S904, S908 or S911 can be executed.

[0145] S905. If the fault of the faulty energy storage module has been solved, reduce the power of the energy storage units of each phase.

[0146] S906. When the power of the energy storage units of each phase is reduced, control the faulty energy storage module with the fault solved to be connected to the energy storage unit of the faulty phase.

[0147] S907. Control the power of the energy storage units of each phase to be restored to the first preset power.

[0148] S908. If the fault of the faulty energy storage module has been solved, reduce the power of the energy storage units of each phase.

[0149] S909. When the power of the energy storage units of each phase is reduced, control the faulty energy storage module with the fault solved to be connected to the energy storage unit of the faulty phase, and control the standby energy storage module to be cut out from the energy storage unit of the faulty phase.

[0150] S910. Control the power of the energy storage units of each phase to be restored to the first preset power.

[0151] S911. If the fault of the faulty energy storage module has been solved, use the faulty energy storage module with the fault solved as the standby energy storage module.

[0152] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown in the direction of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this document, the execution of these steps has no 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-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0153] Based on the same inventive concept, an embodiment of the present application further provides a fault handling device for implementing the above-mentioned fault handling method. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the following fault handling devices can refer to the limitations on the fault handling method in the above text, and will not be repeated here.

[0154] In one embodiment, as Figure 10 shown, Figure 10 is a schematic structural diagram of a fault handling device provided by an embodiment of the present application. The device 1000 includes:

[0155] An isolation module 1001, configured to isolate a faulty energy storage module in the energy storage unit of the energy storage system during the operation of the energy storage system when there is a faulty energy storage module in the energy storage unit of the energy storage system;

[0156] A control module 1002, configured to control the power difference between any two of the energy storage units in each phase of the energy storage system not to exceed a preset power difference when isolating the faulty energy storage module.

[0157] In one of the embodiments, the isolation module 1001 is specifically configured to reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module; if the fault of the faulty energy storage module is not solved, the faulty energy storage module is isolated.

[0158] In one of the embodiments, the isolation module 1001 is specifically configured to turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module.

[0159] In one of the embodiments, the isolation module 1001 is specifically configured to close the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0160] In one embodiment, the isolation module 1001 is specifically configured to disconnect the isolation switch of the battery unit in the faulty energy storage module.

[0161] In one embodiment, the control module 1002 is specifically configured to reduce the power of the energy storage units in other phases to control the power difference between any two of the energy storage units in each phase of the energy storage units to be not greater than a preset power difference; wherein, the energy storage units in other phases include the energy storage units other than the faulty-phase energy storage unit in each phase of the energy storage units, and the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0162] In one embodiment, the control module 1002 is further configured to, if the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit; and control the power of each phase of the energy storage units to be restored to a first preset power.

[0163] In one embodiment, the control module 1002 is specifically configured to reduce the power of each phase of the energy storage units; and in the case where the power of each phase of the energy storage units is reduced, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit.

[0164] In one embodiment, the control module 1002 is specifically configured to control the standby energy storage module to be connected to the faulty-phase energy storage unit to control the power difference between any two of the energy storage units in each phase of the energy storage units to be not greater than a preset power difference; wherein, the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0165] In one embodiment, the control module 1002 is further configured to, if the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit, and control the standby energy storage module to be cut out from the faulty-phase energy storage unit; and control the power of each phase of the energy storage units to be restored to a first preset power.

[0166] In one embodiment, the control module 1002 is specifically configured to reduce the power of each phase of the energy storage units; and in the case where the power of each phase of the energy storage units is reduced, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit, and control the standby energy storage module to be cut out from the faulty-phase energy storage unit.

[0167] In one embodiment, the control module 1002 is further configured to, if the fault of the faulty energy storage module has been resolved, use the faulty energy storage module with the resolved fault as the standby energy storage module.

[0168] Each module in the above-mentioned fault handling device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in the processor of the computer device in hardware form or be independent of it, or be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0169] In one embodiment, a computer device is provided. The computer device can be a terminal, and its internal structure diagram can be as Figure 11 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 implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a fault handling method. 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 covering the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0170] Those skilled in the art can understand that Figure 11 the structure shown in

[0171] is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have a different component layout.

[0172] During the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, isolate the faulty energy storage module;

[0173] When isolating the faulty energy storage module, control the power difference between any two of the three-phase energy storage units of the energy storage system to be not greater than a preset power difference.

[0174] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0175] Reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module;

[0176] If the fault of the faulty energy storage module is not resolved, isolate the faulty energy storage module.

[0177] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0178] Turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module.

[0179] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0180] Close the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0181] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0182] Disconnect the isolation switch of the battery unit in the faulty energy storage module.

[0183] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0184] Reduce the power of the other-phase energy storage units to control the power difference between any two of the energy storage units in each phase of the energy storage units not to be greater than a preset power difference;

[0185] Wherein, the other-phase energy storage units include the energy storage units except the faulty-phase energy storage units in each phase of the energy storage units, and the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0186] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0187] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the fault resolved to be connected to the faulty-phase energy storage unit;

[0188] Control the power of each phase of the energy storage units to be restored to the first preset power.

[0189] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0190] Reduce the power of each phase of the energy storage units;

[0191] When the power of each phase of the energy storage units is reduced, control the faulty energy storage module with the fault resolved to be connected to the faulty-phase energy storage unit.

[0192] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0193] Control the standby energy storage module to access the energy storage unit of the faulty phase, and control the power of the energy storage unit of the faulty phase to recover to the first preset power, so as to control the power difference between any two of the energy storage units of each phase not to be greater than the preset power difference; wherein, the energy storage unit of the faulty phase is an energy storage unit including a faulty energy storage module.

[0194] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0195] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to access the energy storage unit of the faulty phase, and control the standby energy storage module to cut out from the energy storage unit of the faulty phase;

[0196] Control the power of each phase of the energy storage unit to recover to the first preset power.

[0197] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0198] Reduce the power of each phase of the energy storage unit;

[0199] When the power of each phase of the energy storage unit is reduced, control the faulty energy storage module with the resolved fault to access the energy storage unit of the faulty phase, and control the standby energy storage module to cut out from the energy storage unit of the faulty phase.

[0200] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0201] If the fault of the faulty energy storage module has been resolved, use the faulty energy storage module with the resolved fault as the standby energy storage module.

[0202] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0203] During the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, isolate the faulty energy storage module;

[0204] When the faulty energy storage module is isolated, control the power difference between any two of the energy storage units of each phase of the energy storage system not to be greater than the preset power difference.

[0205] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0206] Reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module;

[0207] If the fault of the faulty energy storage module is not resolved, isolate the faulty energy storage module.

[0208] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0209] Turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module.

[0210] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0211] Close the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0212] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0213] Disconnect the isolation switch of the battery unit in the faulty energy storage module.

[0214] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0215] Reduce the power of the energy storage units of other phases to control the power difference between any two of the energy storage units in each phase of the energy storage units not to exceed a preset power difference;

[0216] Wherein, the energy storage units of other phases include the energy storage units except the faulty-phase energy storage unit in each phase of the energy storage units, and the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0217] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0218] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit;

[0219] Control the power of each phase of the energy storage units to recover to the first preset power.

[0220] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0221] Reduce the power of each phase of the energy storage units;

[0222] Under the condition that the power of each phase of the energy storage units is reduced, control the faulty energy storage module with the resolved fault to be connected to the faulty-phase energy storage unit.

[0223] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0224] Control the standby energy storage module to be connected to the faulty-phase energy storage unit, and control the power of the faulty-phase energy storage unit to recover to the first preset power, so as to control the power difference between any two of the energy storage units in each phase of the energy storage units not to exceed a preset power difference; wherein, the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0225] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0226] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase, and control the standby energy storage module to be cut out from the energy storage unit of the faulty phase;

[0227] Control the power of each phase of the energy storage unit to be restored to the first preset power.

[0228] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0229] Reduce the power of each phase of the energy storage unit;

[0230] When the power of each phase of the energy storage unit is reduced, control the faulty energy storage module with the resolved fault to be connected to the energy storage unit of the faulty phase, and control the standby energy storage module to be cut out from the energy storage unit of the faulty phase.

[0231] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0232] If the fault of the faulty energy storage module has been resolved, use the faulty energy storage module with the resolved fault as the standby energy storage module.

[0233] In one embodiment, a computer program product is provided, including a computer program, which when executed by a processor, implements the following steps:

[0234] During the operation of the energy storage system, when there is a faulty energy storage module in the energy storage unit of the energy storage system, isolate the faulty energy storage module;

[0235] When the faulty energy storage module is isolated, control the power difference between any two of the energy storage units of each phase of the energy storage system not to be greater than the preset power difference.

[0236] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0237] Reduce the power of the faulty energy storage module to solve the fault of the faulty energy storage module;

[0238] If the fault of the faulty energy storage module is not resolved, isolate the faulty energy storage module.

[0239] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0240] Turn on the thyristor in the faulty energy storage module to short-circuit the faulty energy storage module.

[0241] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0242] Close the bypass switch in the faulty energy storage module to bypass the faulty energy storage module.

[0243] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0244] Open the isolation switch of the battery unit in the faulty energy storage module.

[0245] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0246] Reduce the power of the energy storage units of other phases to control the power difference between any two of the energy storage units in each phase of the energy storage units not to be greater than a preset power difference;

[0247] Wherein, the energy storage units of other phases include the energy storage units except the faulty-phase energy storage unit in each phase of the energy storage units, and the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0248] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0249] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the fault resolved to be connected to the faulty-phase energy storage unit;

[0250] Control the power of each phase of the energy storage units to be restored to the first preset power.

[0251] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0252] Reduce the power of each phase of the energy storage units;

[0253] Under the condition that the power of each phase of the energy storage units is reduced, control the faulty energy storage module with the fault resolved to be connected to the faulty-phase energy storage unit.

[0254] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0255] Control the standby energy storage module to be connected to the faulty-phase energy storage unit, and control the power of the faulty-phase energy storage unit to be restored to the first preset power, so as to control the power difference between any two of the energy storage units in each phase of the energy storage units not to be greater than a preset power difference; wherein, the faulty-phase energy storage unit is the energy storage unit including the faulty energy storage module.

[0256] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0257] If the fault of the faulty energy storage module has been resolved, control the faulty energy storage module with the resolved fault to connect to the energy storage unit of the faulty phase, and control the standby energy storage module to cut out from the energy storage unit of the faulty phase;

[0258] Control the power of each phase of the energy storage unit to recover to the first preset power.

[0259] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0260] Reduce the power of each phase of the energy storage unit;

[0261] When the power of each phase of the energy storage unit is reduced, control the faulty energy storage module with the resolved fault to connect to the energy storage unit of the faulty phase, and control the standby energy storage module to cut out from the energy storage unit of the faulty phase.

[0262] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0263] If the fault of the faulty energy storage module has been resolved, use the faulty energy storage module with the resolved fault as the standby energy storage module.

[0264] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0265] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., and are not limited thereto.

[0266] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0267] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A fault handling method, characterized in that: The method comprises: During the operation of the energy storage system, if there is a faulty energy storage module in the energy storage unit of the energy storage system, isolating the faulty energy storage module; When the faulty energy storage module is isolated, the power difference between any two phase energy storage units in each phase energy storage unit of the energy storage system is controlled to be no greater than a preset power difference.

2. The method according to claim 1, characterized in that: The isolating the faulty energy storage module includes: Reducing the power of the faulty energy storage module to resolve the fault of the faulty energy storage module; If the fault of the faulty energy storage module is not resolved, the faulty energy storage module is isolated.

3. The method according to claim 1 or 2, characterized in that: The isolating the faulty energy storage module includes: The thyristor in the faulty energy storage module is turned on to short-circuit the faulty energy storage module.

4. The method according to claim 3, characterized in that The method further comprises: The bypass switch in the faulty energy storage module is closed to bypass the faulty energy storage module.

5. The method according to claim 4, characterized in that The method further comprises: Disconnect the isolation switch of the battery unit in the faulty energy storage module.

6. The method according to any one of claims 1 to 5, characterized in that: The controlling the power difference between any two phase energy storage units in each phase energy storage unit of the energy storage system to be not greater than a preset power difference includes: Reducing the power of other phase energy storage units to control the power difference between any two phase energy storage units in each phase energy storage unit to be no greater than a preset power difference; Among them, the other phase energy storage units include energy storage units in the various phase energy storage units except the faulty phase energy storage unit, and the faulty phase energy storage unit is an energy storage unit including the faulty energy storage module.

7. The method according to claim 6, characterized in that The method further comprises: If the fault of the faulty energy storage module has been resolved, controlling the faulty energy storage module whose fault has been resolved to be connected to the faulty phase energy storage unit; Control the power of each phase energy storage unit to recover to the first preset power.

8. The method according to claim 7, characterized in that The faulty energy storage module whose control fault has been resolved is connected to the faulty phase energy storage unit, including: Reducing the power of each phase energy storage unit; When the power of each phase energy storage unit is reduced, the faulty energy storage module whose fault has been resolved is controlled to be connected to the faulty phase energy storage unit.

9. The method according to any one of claims 1 to 5, characterized in that: The controlling the power difference between any two phase energy storage units in each phase energy storage unit of the energy storage system to be not greater than a preset power difference includes: Control the standby energy storage module to connect to the faulty phase energy storage unit, and control the power of the faulty phase energy storage unit to recover to a first preset power, so as to control the power difference between any two phase energy storage units in each phase energy storage unit to be no greater than the preset power difference; Wherein, the fault phase energy storage unit is an energy storage unit including the fault energy storage module.

10. The method according to claim 9, characterized in that The method further comprises: If the fault of the faulty energy storage module has been resolved, controlling the faulty energy storage module whose fault has been resolved to be connected to the faulty phase energy storage unit, and controlling the standby energy storage module to be disconnected from the faulty phase energy storage unit; Control the power of each phase energy storage unit to recover to the first preset power.

11. The method according to claim 10, characterized in that The controlling the faulty energy storage module whose fault has been resolved to be connected to the faulty phase energy storage unit, and controlling the standby energy storage module to be cut out of the faulty phase energy storage unit, comprises: Reducing the power of each phase energy storage unit; When the power of each phase energy storage unit is reduced, the faulty energy storage module whose fault has been resolved is controlled to be connected to the faulty phase energy storage unit, and the backup energy storage module is controlled to be disconnected from the faulty phase energy storage unit.

12. The method according to claim 9, characterized in that The method further comprises: If the fault of the faulty energy storage module has been resolved, the faulty energy storage module whose fault has been resolved is used as a backup energy storage module.

13. A fault handling device, characterized in that: The device comprises: An isolation module is used to isolate a faulty energy storage module when there is a faulty energy storage module in the energy storage unit of the energy storage system during the operation of the energy storage system; The control module is used to control the power difference between any two phase energy storage units in each phase energy storage unit of the energy storage system to be no greater than a preset power difference when the faulty energy storage module is isolated.

14. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 12 are implemented.

15. 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 method according to any one of claims 1 to 12 are implemented.

16. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are implemented.

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