UPS protection device and method, electronic equipment, storage medium and energy storage system

Abstract

The invention relates to the technical field of energy storage, in particular to a UPS (Uninterrupted Power Supply) protection device and method, electronic equipment, a storage medium and an energy storage system, and aims to solve the technical problems of how to cut off a UPS in time, so as to effectively protect the UPS and avoid the power shortage state of a UPS battery pack. In order to achieve the purpose, the UPS protection device comprises a controller and a circuit breaker, the communication end of the controller is in communication connection with a UPS, the control output end of the controller is connected with the circuit breaker, the UPS is connected with a UPS load through the circuit breaker, and the circuit breaker enables the UPS to supply power to the UPS load or disconnect power supply of the UPS load. The UPS state is obtained through the communication end, and the connection or disconnection of the circuit breaker is controlled through the control output end of the controller according to the UPS state. Through the above configuration mode, the UPS can be controlled to supply power to the UPS load or cut off the power supply according to the UPS state, automatic cut-off of the UPS is achieved, the power shortage state of the battery pack of the UPS can be effectively avoided, and effective protection of the UPS is achieved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a UPS protection device, method, electronic device, storage medium and energy storage system. Background Art

[0002] At present, important secondary loads of energy storage containers need to meet the "one inlet and one backup" power supply solution, so each energy storage container needs to be equipped with UPS (Uninterruptible Power Supply) for backup power design. Most energy storage projects are located in sparsely populated areas, and during the initial commissioning and testing of the project site and the actual operation of the project, there may be long-term power outages due to the instability of the power grid. At this time, UPS backup power is required to meet the important functions of secondary equipment such as data recording and logic operation within the specified time.

[0003] The energy storage system has clear requirements for the UPS backup time. It only needs to meet the clear requirements. The UPS host cannot set the time to cut off the discharge, which causes the UPS battery pack to be depleted for a long time. When the UPS is over-discharged, it only sends a buzzer alarm in the early stage. The energy storage station is too large. If the UPS cuts off the output by itself in the later stage of over-discharge, the battery pack SOC is too low, and the station may be unable to charge the battery pack for a long time.

[0004] In the prior art, the industry only relies on the UPS's own monitoring status for protection, which can easily cause the UPS battery pack to be in a low-power state.

[0005] Accordingly, the art needs a new UPS protection solution to solve the above problems. Summary of the invention

[0006] In order to overcome the above-mentioned defects, the present application is proposed to solve or at least partially solve the technical problem of how to timely cut off the UPS to achieve effective protection of the UPS and avoid the UPS battery pack being in a low-power state.

[0007] In a first aspect, a UPS protection device is provided, the device comprising a controller and a circuit breaker;

[0008] The communication end of the controller is connected to the UPS of the energy storage system for communication, and the controller obtains the UPS status of the UPS;

[0009] The control output terminal of the controller is connected to the circuit breaker, and controls the circuit breaker to be connected or disconnected according to the UPS state;

[0010] The UPS is connected to the UPS load via the circuit breaker;

[0011] The circuit breaker enables the UPS to supply power to the UPS load, or disconnects the power supply to the UPS load.

[0012] In one technical solution of the above UPS protection device, the controller further includes a first control input terminal;

[0013] The first control input terminal is connected to the mains power access terminal of the energy storage system.

[0014] In one technical solution of the above UPS protection device, the controller further includes a second control input terminal;

[0015] The second control input terminal is connected to the backup power system access terminal of the energy storage system.

[0016] In a second aspect, a UPS protection method is provided, the method being applied to a controller, wherein a communication terminal of the controller is communicatively connected to a UPS of an energy storage system, and the controller obtains a UPS state of the UPS; a control output terminal of the controller is connected to a circuit breaker, and the circuit breaker is controlled to be connected or disconnected according to the UPS state; the UPS is connected to a UPS load through the circuit breaker; the circuit breaker enables the UPS to supply power to the UPS load, or disconnects the power supply to the UPS load;

[0017] The method comprises:

[0018] Acquiring a UPS status of the UPS through the communication terminal;

[0019] According to the UPS status, the circuit breaker is controlled to be connected or disconnected through the control output terminal.

[0020] In a technical solution of the above UPS protection method, the controller further includes a first control input terminal; the first control input terminal is connected to the mains access terminal of the energy storage system;

[0021] According to the UPS state, controlling the circuit breaker to connect or disconnect through the control output terminal includes:

[0022] Acquiring the mains power access status of the mains power access terminal through the first control input terminal;

[0023] When the mains access state is that the power-on signal is disconnected, the circuit breaker is controlled to be connected or disconnected through the control output terminal according to the UPS state; and / or,

[0024] The UPS status includes a UPS charge status;

[0025] The obtaining the UPS status of the UPS through the communication terminal includes:

[0026] The UPS charging status is obtained through the communication terminal.

[0027] In a technical solution of the above UPS protection method, the controller further includes a second control input terminal; the second control input terminal is connected to the backup power system access terminal of the energy storage system;

[0028] When the mains access state is that the power-on signal is disconnected, controlling the circuit breaker to connect or disconnect through the control output terminal according to the UPS state includes:

[0029] Acquiring the backup power access status of the backup power system access terminal through the second control input terminal;

[0030] When the mains power access state is that the power-on signal is disconnected and the backup power access state is also that the power-on signal is disconnected, the circuit breaker is controlled to be connected or disconnected through the control output terminal according to the UPS state.

[0031] In a technical solution of the above UPS protection method, the UPS status includes a UPS charge status and a power supply duration of the UPS supplying power to the UPS load;

[0032] According to the UPS state, controlling the circuit breaker to connect or disconnect through the control output terminal includes:

[0033] When the power supply duration reaches a preset duration, or the UPS charge state is less than a preset threshold, the circuit breaker is controlled to be disconnected through the control output terminal.

[0034] In a third aspect, an electronic device is provided, comprising at least one processor; and a memory communicatively connected to the at least one processor; wherein a computer program is stored in the memory, and when the computer program is executed by the at least one processor, the method described in any one of the technical solutions of the above-mentioned UPS protection method is implemented.

[0035] In a fourth aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored in the computer-readable storage medium, wherein the program codes are suitable for being loaded and run by a processor to execute the method described in any one of the technical solutions of the above-mentioned UPS protection method.

[0036] In a fifth aspect, an energy storage system is provided, wherein the energy storage system comprises a UPS protection device and a UPS as described in any one of the technical solutions of the above-mentioned UPS protection device.

[0037] The above one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0038] In the implementation of the UPS protection technical solution provided by the present application, the UPS protection device of the present application includes a controller and a circuit breaker, the communication end of the controller is connected to the UPS communication, the control output end of the controller is connected to the circuit breaker, the UPS is connected to the UPS load through the circuit breaker, and the circuit breaker enables the UPS to supply power to the UPS load, or disconnect the power supply to the UPS load. The UPS status is obtained through the communication end, and the connection or disconnection of the circuit breaker is controlled through the control output end of the controller according to the UPS status. Through the above configuration method, the present application can realize the control of the UPS to supply power to the UPS load or disconnect the power supply according to the UPS status, realize the automatic disconnection of the UPS, can effectively avoid the low power state of the UPS battery pack, and realize the effective protection of the UPS. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The disclosure of the present application will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. Among them:

[0040] Figure 1 is a schematic diagram of the main components of a UPS protection device according to an embodiment of the present application;

[0041] Figure 2 is a schematic diagram of the main internal connection relationship of an energy storage system according to an implementation method of an embodiment of the present application;

[0042] Figure 3 is a schematic diagram of the main components of a UPS protection device in one implementation of an embodiment of the present application;

[0043] Figure 4 is a schematic diagram of the main internal connection relationship of an energy storage system according to another implementation of an embodiment of the present application;

[0044] Figure 5 It is a flowchart of the main steps of a UPS protection method according to an embodiment of the present application.

[0045] Reference numerals:

[0046] 1: controller; 11: communication terminal; 12: control output terminal; 13: first control input terminal; 14: second control input terminal; 2: circuit breaker; 3: UPS. DETAILED DESCRIPTION

[0047] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0048] In the description of the present application, "module" and "processor" may include hardware, software or a combination of the two. A module may include hardware circuits, various suitable sensors, communication ports, memory, and may also include software parts, such as program code, or a combination of software and hardware. The processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor or any other suitable processor. The processor has data and / or signal processing functions. The processor may be implemented in software, hardware or a combination of the two. Computer-readable storage media include any suitable medium that can store program code, such as a disk, a hard disk, an optical disk, a flash memory, a read-only memory, a random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or A and B. The term "at least one A or B" or "at least one of A and B" has a similar meaning to "A and / or B" and may include only A, only B or A and B. The singular terms "one" and "the" may also include plural forms.

[0049] The role of UPS (Uninterruptible Power Supply) in the energy storage system is to provide backup power, so that the energy storage system can ensure the power supply of important loads and communication equipment when there is no mains power supply, so as to meet the needs of data recording and fault reporting of the energy storage system. The energy storage system has clear requirements for the UPS backup time, and it only needs to meet the clear requirements. However, the existing technology often relies only on UPS self-monitoring to achieve UPS protection, and cannot avoid the occurrence of battery pack power loss during UPS power supply.

[0050] Accordingly, the art needs a new UPS protection solution to solve the above problems.

[0051] See attached Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the main components of a UPS protection device according to an embodiment of the present application. Figure 1 As shown, the UPS protection device may include a controller 1 and a circuit breaker 2. The communication terminal 11 of the controller 1 is connected to the UPS 3 of the energy storage system for communication, and the controller 1 obtains the UPS state of the UPS 3; the control output terminal 12 of the controller 1 is connected to the circuit breaker 2, and the circuit breaker 2 is controlled to be connected or disconnected according to the UPS state; the UPS 3 is connected to the UPS load through the circuit breaker 2; the circuit breaker 2 enables the UPS 3 to supply power to the UPS load, or disconnects the power supply to the UPS load.

[0052] In this embodiment, if Figure 1As shown, the controller 1 obtains the UPS status through the communication terminal 11 (P1), and controls the connection and disconnection of the circuit breaker 2 through the control output terminal 12 (DO1) according to the UPS status, so as to control the UPS3 to supply power to the UPS load or disconnect the power supply of the UPS load. Among them, the UPS load is the load that needs to be operated when the mains power supply and the backup power supply of the energy storage system are disconnected. The UPS load can realize the functions of data recording, fault reporting, etc. of the energy storage system. The UPS load often only needs to run for a certain period of time to complete the functions of data recording, fault reporting, etc.

[0053] In one implementation, the UPS status may include a state of charge (SOC) of the UPS 3 and a power supply duration for the UPS 3 to supply power to the UPS load.

[0054] In one embodiment, if Figure 1 As shown, the communication terminal 11 of the controller 1 is an RS232 port.

[0055] In one embodiment, please refer to the attached Figure 2 , Figure 2 FIG. 1 is a schematic diagram of the main internal connection relationship of an energy storage system according to an implementation method of the present application. Figure 2 As shown, the energy storage system is connected to the three-phase four-wire 380V mains through the inverter-boost integrated machine input to realize the normal power supply of the energy storage system. When the energy storage system is powered by the mains, the power-on signal of the mains access terminal QF1 is connected. When the power-on signal of QF1 is disconnected, it means that the energy storage system is not connected to the mains. When the energy storage system is powered by the mains, the energy storage system can be powered by power equipment 1, sockets in the cabinet, power equipment 2, and power equipment 3 by controlling QF101, RCD102, QF103, and QF104 respectively. QF1, QF101, RCD102, QF103, and QF104 can be electronic switches or mechanical switches.

[0056] In one embodiment, see the attached Figure 3 , Figure 3 FIG. 1 is a schematic diagram of the main components of a UPS protection device according to an embodiment of the present application. Figure 3 As shown, the controller 1 may further include a first control input terminal 13 (DI1). The first control input terminal is connected to a mains access terminal (ie, QF1) of the energy storage system.

[0057] In one embodiment, if Figure 3 As shown, the controller 1 may further include a second control input terminal 14 (DI2), and the second control input terminal 14 is connected to the backup power system access terminal (ie, QF2) of the energy storage system.

[0058] In this embodiment, please refer to the attached Figure 4 , Figure 4 FIG. 1 is a schematic diagram of the main internal connection relationship of an energy storage system according to another implementation of the embodiment of the present application. Figure 4 As shown, the energy storage system has dual power supplies of ATS (Automatic Transfer Switching Equipment), which can realize the input of the inverter-boosting integrated machine and connect to the three-phase four-wire 380V mains power, and can also realize the input of the inverter-boosting integrated machine and connect to the 220V backup power. The mains power and the backup power are switched through ATS. When the energy storage system is powered by the mains power, the power-on signal of the mains power access terminal QF1 is connected. When the energy storage system is powered by the backup power, the power-on signal of the backup power system access terminal QF3 is connected. When the power-on signal of QF1 is disconnected, it means that the energy storage system is not connected to the mains. When the power-on signal of QF3 is disconnected, it means that the energy storage system is not connected to the backup power system. When the energy storage system is powered by the mains power or the backup power, the energy storage system can be powered by power equipment 1, the socket in the cabinet, the power equipment 2, and the power equipment 3 by controlling QF101, RCD102, QF103, and QF104 respectively. QF1, QF101, RCD102, QF103, and QF104 can be electronic switches or mechanical switches.

[0059] like Figure 2 and Figure 4 As shown, UPS3 is connected to UPS loads through circuit breaker 2 (QF200), wherein the UPS loads include communication equipment 1, communication equipment 2, important loads, etc. Communication equipment 1, communication equipment 2, and important loads are connected to circuit breaker 2 through QF202, QF203, and QF204, respectively, and QF202, QF203, and QF204 can be electronic switches or mechanical switches.

[0060] Through the above settings, the present application can control UPS3 to supply or disconnect power to the UPS load according to the UPS status, realize automatic disconnection of UPS3, effectively avoid the low power state of the battery pack of UPS3, and realize effective protection of UPS3.

[0061] Furthermore, the present application also provides a UPS protection method.

[0062] See attached Figure 5 , Figure 5 FIG. 1 is a flow chart of the main steps of a UPS protection method according to an embodiment of the present application. Figure 5As shown, the UPS protection method in the embodiment of the present application is applied to a controller, the communication end of the controller is connected to the UPS of the energy storage system, and the controller obtains the UPS status of the UPS; the control output end of the controller is connected to the circuit breaker, and the circuit breaker is controlled to connect or disconnect according to the UPS status; the UPS is connected to the UPS load through the circuit breaker; the circuit breaker enables the UPS to supply power to the UPS load, or disconnects the power supply to the UPS load. The UPS protection method mainly includes the following steps S101 to S102.

[0063] Step S101: obtaining the UPS status of the UPS through the communication terminal.

[0064] In this embodiment, the UPS status can be obtained through the communication terminal of the controller.

[0065] In one implementation, the UPS charge status may be obtained through a communication terminal of the controller.

[0066] Step S102: According to the UPS status, the circuit breaker is controlled to be connected or disconnected by controlling the output terminal.

[0067] In this embodiment, the connection or disconnection of the circuit breaker can be controlled according to the UPS status, thereby controlling the UPS to supply power to the UPS load, or to disconnect the power supply.

[0068] In one embodiment, the controller may further include a first control input terminal; the first control input terminal is connected to the mains access terminal of the energy storage system; step S102 may further include the following steps S1021 and S1022:

[0069] Step S1021: obtaining the mains power access status of the mains power access terminal through the first control input terminal.

[0070] In this implementation, the mains power access status of the mains power access terminal may be acquired through the first control input terminal.

[0071] Step S1022: When the mains power access state is that the power-on signal is disconnected, the circuit breaker is controlled to be connected or disconnected by controlling the output terminal according to the UPS state.

[0072] In this embodiment, when the mains power access state is that the power-on signal is disconnected, the energy storage system will enable the UPS to supply power to the UPS load. At this time, the connection or disconnection of the circuit breaker can be controlled by controlling the output terminal according to the UPS state.

[0073] In one embodiment, the controller further includes a second control input terminal; the second control input terminal is connected to the backup power system access terminal of the energy storage system. Step S1022 may further include the following steps S10221 and S10222:

[0074] Step S10221: Acquire the backup power access status of the backup power system access terminal through the second control input terminal.

[0075] Step S10222: When the mains power access state is that the power-on signal is disconnected and the backup power access state is also that the power-on signal is disconnected, the circuit breaker is controlled to be connected or disconnected by controlling the output terminal according to the UPS state.

[0076] In this embodiment, when the energy storage system can be connected to the mains and there is a backup power system, when the power-on signal is disconnected in both the mains access state and the backup power access state, the energy storage system will enable the UPS to supply power to the UPS load. At this time, the connection and disconnection of the circuit breaker can be controlled by controlling the output end according to the UPS status.

[0077] In one embodiment, the UPS state may include the UPS charge state and the power supply duration of the UPS for the UPS load; according to the UPS state, the specific steps of controlling the connection or disconnection of the circuit breaker by controlling the output terminal are:

[0078] When the power supply duration reaches the preset duration, or the UPS charge state is less than the preset threshold, the circuit breaker is disconnected by controlling the output terminal.

[0079] In this embodiment, after the energy storage system enables the UPS to supply power to the UPS load, the connection and disconnection of the circuit breaker can be determined according to the UPS charge state and the power supply time of the UPS to the UPS load. When the power supply time of the UPS to the UPS load reaches a preset time and the UPS charge state is less than a preset threshold, one of the two conditions is met, a control signal can be output through the control output terminal of the controller to control the circuit breaker to disconnect, so as to avoid the battery pack of the UPS from running out of power. Those skilled in the art can set the values ​​of the preset time and the preset threshold according to the needs of actual applications.

[0080] Through the method described in the above steps S101 to S102, the UPS protection device of the embodiment of the present application includes a controller and a circuit breaker, the communication end of the controller is connected to the UPS communication, the control output end of the controller is connected to the circuit breaker, the UPS is connected to the UPS load through the circuit breaker, and the circuit breaker enables the UPS to supply power to the UPS load, or disconnect the power supply to the UPS load. The UPS state is obtained through the communication end, and the connection or disconnection of the circuit breaker is controlled through the control output end of the controller according to the UPS state. Through the above configuration method, the embodiment of the present application can realize the control of the UPS to supply power to the UPS load or disconnect the power supply according to the UPS state, realize the automatic disconnection of the UPS, can effectively avoid the low power state of the UPS battery pack, and realize the effective protection of the UPS.

[0081] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effect of the present application, different steps do not have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders. These adjusted schemes are equivalent to the technical schemes described in this application, and therefore will also fall within the scope of protection of this application.

[0082] It is understood by those skilled in the art that all or part of the processes in the method for implementing the above-mentioned embodiment of the present application can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code.

[0083] Another aspect of the present application also provides a computer-readable storage medium.

[0084] In an embodiment of a computer-readable storage medium according to the present application, the computer-readable storage medium may be configured to store a program for executing the UPS protection method of the above method embodiment, and the program may be loaded and run by a processor to implement the above UPS protection method. For ease of explanation, only the parts related to the embodiment of the present application are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present application. The computer-readable storage medium may be a storage device formed by various electronic devices. Optionally, the computer-readable storage medium in the embodiment of the present application is a non-transitory computer-readable storage medium.

[0085] Another aspect of the present application provides an electronic device.

[0086] In an embodiment of an electronic device according to the present application, the electronic device may include at least one processor; and a memory communicatively connected to the at least one processor; wherein a computer program is stored in the memory, and when the computer program is executed by the at least one processor, the method described in any of the above embodiments is implemented.

[0087] Another aspect of the present application also provides an energy storage system.

[0088] In an embodiment of an energy storage system according to the present application, the energy storage system may include the UPS protection device in the above UPS protection device embodiment and ups .

[0089] So far, the technical solution of the present application has been described in conjunction with an embodiment shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A UPS protection device, characterized in that: The device includes a controller and a circuit breaker; The communication end of the controller is connected to the UPS of the energy storage system for communication, and the controller obtains the UPS status of the UPS; The control output terminal of the controller is connected to the circuit breaker, and controls the circuit breaker to be connected or disconnected according to the UPS state; The UPS is connected to the UPS load via the circuit breaker; The circuit breaker enables the UPS to supply power to the UPS load, or disconnects the power supply to the UPS load.

2. The UPS protection device according to claim 1, characterized in that: The controller also includes a first control input terminal; The first control input terminal is connected to the mains power access terminal of the energy storage system.

3. The UPS protection device according to claim 2, characterized in that: The controller also includes a second control input; The second control input terminal is connected to the backup power system access terminal of the energy storage system.

4. A UPS protection method, characterized in that: The method is applied to a controller, wherein a communication terminal of the controller is connected to a UPS of an energy storage system, and the controller obtains a UPS state of the UPS; a control output terminal of the controller is connected to a circuit breaker, and the circuit breaker is controlled to be connected or disconnected according to the UPS state; and the UPS is connected to a UPS load through the circuit breaker; The circuit breaker enables the UPS to supply power to the UPS load, or disconnects the power supply to the UPS load; The method comprises: Acquiring a UPS status of the UPS through the communication terminal; According to the UPS status, the circuit breaker is controlled to be connected or disconnected through the control output terminal.

5. The UPS protection method according to claim 4, characterized in that: The controller further comprises a first control input terminal; the first control input terminal is connected to the mains access terminal of the energy storage system; According to the UPS state, controlling the circuit breaker to connect or disconnect through the control output terminal includes: Acquiring the mains power access status of the mains power access terminal through the first control input terminal; When the mains access state is that the power-on signal is disconnected, the circuit breaker is controlled to be connected or disconnected through the control output terminal according to the UPS state; and / or, The UPS status includes a UPS charge status; The obtaining the UPS status of the UPS through the communication terminal includes: The UPS charging status is obtained through the communication terminal.

6. The UPS protection method according to claim 5, characterized in that: The controller further includes a second control input terminal; the second control input terminal is connected to the backup power system access terminal of the energy storage system; When the mains access state is that the power-on signal is disconnected, controlling the circuit breaker to connect or disconnect through the control output terminal according to the UPS state includes: Acquiring the backup power access status of the backup power system access terminal through the second control input terminal; When the mains power access state is that the power-on signal is disconnected and the backup power access state is also that the power-on signal is disconnected, the circuit breaker is controlled to be connected or disconnected through the control output terminal according to the UPS state.

7. The UPS protection method according to any one of claims 4 to 6, characterized in that: The UPS status includes a UPS charge status and a power supply duration for the UPS to supply power to the UPS load; According to the UPS state, controlling the circuit breaker to connect or disconnect through the control output terminal includes: When the power supply duration reaches a preset duration, or the UPS charge state is less than a preset threshold, the circuit breaker is controlled to be disconnected through the control output terminal.

8. An electronic device, characterized in that: include: at least one processor; and, a memory communicatively coupled to the at least one processor; Wherein, a computer program is stored in the memory, and when the computer program is executed by the at least one processor, the UPS protection method according to any one of claims 4 to 8 is implemented.

9. A computer-readable storage medium storing a plurality of program codes, characterized in that: The program code is suitable for being loaded and run by a processor to execute the UPS protection method according to any one of claims 4 to 8.

10. An energy storage system, characterized in that: The energy storage system comprises a UPS protection device and a UPS according to any one of claims 1 to 3.

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