Fault detection and troubleshooting method, apparatus, storage medium

Abstract

The application provides a fault detection and troubleshooting method, device and storage medium. The fault detection method comprises the following steps: acquiring a working state of the self and a current parallel connection sequence of the self in a parallel connection power supply group; determining a fault detection strategy for detecting a fault according to the current parallel connection sequence of the self in the parallel connection power supply group; and determining a fault detection result for indicating whether the energy storage power supply is a parallel connection fault power supply according to the fault detection strategy and the working state. The troubleshooting method comprises the following steps: receiving a fault detection result sent by an energy storage power supply; removing the energy storage power supply determined as the parallel connection fault power supply from a plurality of energy storage power supplies to obtain a plurality of normal energy storage power supplies according to the fault detection result; and updating a parallel connection sequence of the plurality of normal energy storage power supplies according to state data of each normal energy storage power supply in the plurality of normal energy storage power supplies.

Description

Technical Field

[0001] This application relates to the field of power control, and in particular to a method, apparatus, and storage medium for fault detection and troubleshooting. Background Technology

[0002] Outdoor sports have become a popular weekend or regular leisure activity, and outdoor energy storage power supplies are an indispensable piece of equipment for these activities, allowing home appliances to be used directly outdoors. However, due to the limitations of energy storage and power output of outdoor energy storage power supplies, to be compatible with most household appliances, a single unit must have an output power of at least 2kW. This results in a very large and heavy power supply, causing inconvenience. Related technologies have increased the output power of smaller energy storage power supplies by paralleling multiple units. However, when a fault occurs among the paralleled power supplies, manual intervention is often required for fault detection and troubleshooting. Summary of the Invention

[0003] This application provides a fault detection and troubleshooting method, apparatus, and storage medium that can quickly detect faults in multiple energy storage power sources after parallel operation without manual intervention, and can quickly achieve fault troubleshooting.

[0004] The technical solution of this application embodiment is implemented as follows:

[0005] This application provides a fault detection method, which is applied to an energy storage power source within a parallel power supply group. The method includes:

[0006] Obtain the operating status of the energy storage power source and the current paralleling sequence of the energy storage power sources in the parallel power source group;

[0007] Determine the fault detection strategy based on the current parallel operation sequence;

[0008] Based on the fault detection strategy and the operating status, the fault detection result of the energy storage power supply is determined; the fault detection result is used to characterize whether the energy storage power supply is a parallel-operated fault power supply.

[0009] In some embodiments, determining the fault detection result of the energy storage power supply based on the fault detection strategy and the operating state includes:

[0010] If the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is the first-end energy storage power supply, then the energy storage power supply is determined to be a paralleling fault power supply.

[0011] In some embodiments, determining the fault detection result of the energy storage power supply based on the fault detection strategy and the operating state includes:

[0012] When the working state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is not the first-end energy storage power supply, it is determined whether overload protection should occur based on the load power.

[0013] In the event of an overload protection failure, the energy storage power supply is identified as a parallel operation fault power supply.

[0014] In some embodiments, the non-first-end energy storage power source includes an intermediate energy storage power source; the method further includes:

[0015] When the operating state indicates that the energy storage power supply has no output and the current parallel operation sequence indicates that the energy storage power supply is an intermediate energy storage power supply, the charging and discharging relay of the energy storage power supply is controlled to be in the closed state and the inverter output of the energy storage power supply is turned off.

[0016] In some embodiments, the method further includes:

[0017] The fault detection results of the energy storage power supply are sent to the client; the client is used to troubleshoot parallel power supply faults in the parallel power supply group based on the fault detection results.

[0018] This application provides a troubleshooting method, the method comprising:

[0019] Receive a fault detection result from at least one of a plurality of energy storage power sources; the fault detection result is used to characterize whether the energy storage power source is a parallel-connected fault power source;

[0020] Based on the status data of each of the multiple normal energy storage power sources, the paralleling sequence of the multiple normal energy storage power sources is updated; the status data is used to determine the operating status of the normal energy storage power source; the normal energy storage power source is the energy storage power source other than the power source with paralleling failure among the multiple energy storage power sources.

[0021] In some embodiments, updating the parallel operation sequence of the plurality of normal energy storage power sources based on the status data of each of the multiple normal energy storage power sources includes:

[0022] Based on the status data of each of the normal energy storage power sources, a first-end energy storage power source is determined among the plurality of normal energy storage power sources.

[0023] Based on the status data of each other energy storage power source and the status data of the first-end energy storage power source, the parallel operation sequence of the multiple other energy storage power sources is determined; the other energy storage power sources are the normal energy storage power sources other than the first-end energy storage power source among the multiple normal energy storage power sources.

[0024] This application provides a fault detection device, the device comprising:

[0025] The acquisition unit is used to acquire the operating status of the energy storage power supply and the current paralleling order of the energy storage power supply in the parallel power supply group;

[0026] The first determining unit is used to determine a fault detection strategy based on the current parallel operation sequence;

[0027] The second determining unit is used to determine the fault detection result of the energy storage power supply based on the fault detection strategy and the operating state; the fault detection result is used to characterize whether the energy storage power supply is a parallel fault power supply.

[0028] This application provides a troubleshooting device, the device comprising:

[0029] A receiving unit is configured to receive a fault detection result sent by at least one of the multiple energy storage power sources; the fault detection result is used to characterize whether the energy storage power source is a parallel-operated fault power source.

[0030] An update unit is used to update the paralleling sequence of the multiple normal energy storage power sources based on the status data of each of the multiple normal energy storage power sources; the status data is used to determine the operating status of the normal energy storage power source; the normal energy storage power source is the energy storage power source other than the paralleling fault power source among the multiple energy storage power sources.

[0031] This application provides a fault detection device, including:

[0032] Memory, used to store executable instructions;

[0033] The processor, when executing executable instructions stored in the memory, implements the fault detection method provided in the embodiments of this application.

[0034] This application provides a troubleshooting device, including:

[0035] Memory, used to store executable instructions;

[0036] The processor, when executing executable instructions stored in the memory, implements the troubleshooting method provided in the embodiments of this application.

[0037] This application provides a storage medium, characterized in that the storage medium stores executable instructions, which, when executed by a processor, implement the fault detection method or the fault troubleshooting method provided in this application.

[0038] The embodiments of this application have the following beneficial effects:

[0039] In this embodiment, the energy storage power supply within the parallel power supply group can obtain its own operating status and its current paralleling order within the group; determine a fault detection strategy based on its current paralleling order; and determine a fault detection result, characterizing whether the energy storage power supply is a paralleling faulty power supply, based on the fault detection strategy and the operating status. Furthermore, this embodiment can also receive fault detection results from the energy storage power supply, remove the energy storage power supply identified as a paralleling faulty power supply from the pool of energy storage power supplies based on the fault detection results, obtaining multiple normal energy storage power supplies. Then, based on the status data of each normal energy storage power supply, the paralleling order of the multiple normal energy storage power supplies is updated. Thus, the energy storage power supply in this embodiment can determine different fault detection strategies based on its different paralleling orders, enabling rapid fault detection without manual intervention; and updating the paralleling order of normal energy storage power supplies also achieves rapid fault elimination without manual intervention. Attached Figure Description

[0040] Figure 1 A schematic flowchart of an optional fault detection method provided in an embodiment of this application;

[0041] Figure 2 This is an optional connection method for the parallel power supply group provided in the embodiments of this application;

[0042] Figure 3 A schematic flowchart of an optional fault detection method provided in an embodiment of this application;

[0043] Figure 4 A schematic flowchart of an optional fault detection method provided in an embodiment of this application;

[0044] Figure 5 A schematic flowchart of an optional troubleshooting method provided in an embodiment of this application.

[0045] Figure 6a An optional flowchart illustrating the fault detection and troubleshooting method for the first energy storage power supply provided in this application embodiment;

[0046] Figure 6bA schematic flowchart of an optional method for fault detection and troubleshooting of the last energy storage power source provided in the embodiments of this application;

[0047] Figure 6c A schematic flowchart of an optional fault detection and troubleshooting method for intermediate energy storage power supply provided in the embodiments of this application;

[0048] Figure 7 This is a schematic diagram of the composition structure of the fault detection device provided in the embodiments of this application;

[0049] Figure 8 This is a schematic diagram of the composition structure of the troubleshooting device provided in the embodiments of this application;

[0050] Figure 9 This is a schematic diagram of the composition structure of the fault detection device provided in the embodiments of this application;

[0051] Figure 10 This is a schematic diagram of the composition structure of the troubleshooting device provided in the embodiments of this application. Detailed Implementation

[0052] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] To enable those skilled in the art to better understand the embodiments of this disclosure, the technical solutions of the embodiments of this disclosure will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of this application, and not all of them.

[0054] The terms "first," "second," and "third," etc., in the specification, embodiments, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as including a series of steps or units. A method, system, product, or apparatus is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0055] This disclosure provides a fault detection method that can be applied to energy storage power sources within a parallel power supply group, such as in the detection devices of each energy storage power source. The detection device can detect whether an energy storage power source is a faulty parallel power source. In some embodiments, the paralleling sequence of multiple energy storage power sources within the parallel power supply group has been determined. That is, the fault detection method provided in this application is executed under the premise that the paralleling sequence of multiple energy storage power sources has been determined and they begin operation according to the paralleling sequence.

[0056] Figure 1 This is a flowchart of a fault detection method according to an embodiment of this application, such as... Figure 1 As shown, the process may include:

[0057] In S101, the operating status of the energy storage power supply and the current paralleling order of the energy storage power supply in the parallel power supply group are obtained.

[0058] In some embodiments, the energy storage power sources within a parallel power supply group can obtain their own operating status and current parallel order within the group based on instructions sent by the client. In practical applications, when a user discovers that the parallel power supply group is malfunctioning, they can click the "send instruction" button on the client's control, and the client can then send instructions to each energy storage power source within the parallel power supply group.

[0059] In some embodiments, the energy storage power supply in the parallel power supply group can automatically acquire its own working status and its current parallel order in the parallel power supply group within a preset period.

[0060] Here, energy storage power refers to energy storage power equipment. Each energy storage power has a bidirectional inverter function, which can meet the requirements of inverter input and inverter output. In this way, the energy storage power in this embodiment can not only meet the requirement that home-related equipment can be used directly outdoors without interruption, but also convert the AC power from the socket into DC power to charge the battery inside the energy storage power.

[0061] The operating status of an energy storage power source is used to characterize whether there is output at its output terminal. In some embodiments, the operating status of the energy storage power source can be obtained in the following way: the energy storage power source acquires its own status data and determines its own operating status based on the status data. The status data can be a level signal. In practical applications, the detection module inside the energy storage power source can detect the output terminal, specifically whether there is voltage and / or current at the output terminal. When voltage and / or current are detected at the output terminal, a high-level signal can be sent to the control module inside the energy storage power source. Then, the control module sends the high-level signal representing output at the output terminal to the acquisition module in the energy storage power source for obtaining the operating status via the communication module. When no voltage and / or current are detected at the output terminal, a low-level signal can be sent to the control module inside the energy storage power source. Then, the control module sends the low-level signal representing no voltage and / or current at the output terminal to the acquisition module via the communication module. In this way, the operating status of the energy storage power source can be determined through its status data.

[0062] In some embodiments, the control module of the energy storage power supply may be at least one of the following: Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), Central Processing Unit (CPU), Controller, Microcontroller Unit (MCU), and Microprocessor.

[0063] The current parallel sequence of an energy storage power source can characterize its parallel sequence within a parallel power source group. Figure 2 This is one implementation of the parallel power supply group in the embodiments of this application, such as... Figure 2 As shown, the output terminal of energy storage power source A is connected to the input terminal of energy storage power source B, the output terminal of energy storage power source B is connected to the input terminal of energy storage power source C, and the output terminal of energy storage power source C is connected to the input terminal of energy storage power source D. Furthermore, the client has already determined the parallel operation order of the four energy storage power sources: the current parallel operation order of energy storage power source A is 1, the current parallel operation order of energy storage power source B is 2, the current parallel operation order of energy storage power source C is 3, and the current parallel operation order of energy storage power source D is 4. After determining the current parallel operation order of each energy storage power source, the client will send the current parallel operation order of each energy storage power source to the energy storage module.

[0064] In practical applications, when the acquisition module in the energy storage power supply needs to obtain the current paralleling order, it can communicate with the storage module to obtain the current paralleling order of the energy storage power supply.

[0065] In S102, a fault detection strategy is determined based on the current parallel operation sequence.

[0066] After the energy storage power source obtains its current paralleling sequence, it can determine a fault detection strategy based on this sequence. This fault detection strategy characterizes the approach used to detect faults in the energy storage power source. Different current paralleling sequences correspond to different fault detection strategies.

[0067] When the current paralleling sequence indicates that the energy storage power supply is the first energy storage power supply, the corresponding fault detection strategy can be: determine whether the energy storage power supply has failed based on whether there is output at the output end of the energy storage power supply, and determine whether to update the paralleling sequence of the parallel power supply group.

[0068] When the current paralleling sequence indicates that the energy storage power supply is not the first-end energy storage power supply, the corresponding fault detection strategy can be as follows: if it is determined that the energy storage power supply has no output and an overload protection has occurred, it can be determined that the energy storage power supply has failed and the paralleling sequence of the parallel power supply group needs to be re-determined; if it is determined that the energy storage power supply has no output but no overload protection has occurred, it can be considered that although the energy storage power supply has failed, it is not necessary to re-determine the paralleling sequence of the parallel power supply group.

[0069] In practical applications, the storage module of each energy storage power source in the parallel power supply group can store the mapping relationship between the paralleling sequence and the fault detection strategy. The determination module in the energy storage power source for determining the fault detection strategy can obtain the mapping relationship between the current paralleling sequence and the fault detection strategy from the storage module, and then determine the fault detection strategy corresponding to the current paralleling sequence. That is, S102 may include: obtaining the mapping relationship between the paralleling sequence and the fault detection strategy, and determining the fault detection strategy based on the current paralleling sequence of the energy storage power source and the mapping relationship.

[0070] In S103, the fault detection result of the energy storage power supply is determined according to the fault detection strategy and the operating state.

[0071] In some embodiments, after determining the fault detection strategy corresponding to its parallel operation sequence and its own operating state, the energy storage power source can determine the fault detection result based on the fault detection strategy and operating state. This fault detection result characterizes whether the energy storage power source is a parallel operation failure power source. Here, a parallel operation failure power source can characterize the parallel operation sequence of multiple energy storage power sources within a parallel power source group that needs to be updated. That is, when the fault detection result of the energy storage power source determines that it is a parallel operation failure power source, it can be determined that the parallel operation sequence of multiple energy storage power sources within the parallel power source group needs to be updated; when the fault detection result of the energy storage power source determines that it is not a parallel operation failure power source, it can be determined that the parallel operation sequence of multiple energy storage power sources within the parallel power source group does not need to be updated.

[0072] In some embodiments, when the fault detection strategy is to determine whether a fault has occurred in the energy storage power supply based on whether there is output at the output terminal of the energy storage power supply, and to determine whether to update the paralleling sequence of the parallel power supply group, S103 may include: determining the fault detection result of the energy storage power supply based on its operating state. That is, when the current paralleling sequence of the energy storage power supply indicates that the energy storage power supply is the first-end energy storage power supply, the fault detection result of the energy storage power supply can be determined simply based on its operating state.

[0073] In some embodiments, the fault detection strategy is as follows: if it is determined that the energy storage power supply has no output and overload protection has occurred, it can be determined that the energy storage power supply has failed, and the paralleling sequence of the parallel power supply group needs to be re-determined; if it is determined that the energy storage power supply has no output but no overload protection has occurred, it can be considered that although the energy storage power supply has failed, the paralleling sequence of the parallel power supply group does not need to be re-determined. S103 may include: determining the fault detection result of the energy storage power supply based on the operating state of the energy storage power supply and the overload event. The overload event is used to characterize whether the parallel power supply group has experienced overload protection.

[0074] In this embodiment, the energy storage power source within the parallel power supply group can obtain its own operating status and its current paralleling order within the group; determine a fault detection strategy based on its current paralleling order; and determine a fault detection result, characterizing whether the energy storage power source is a paralleling faulty power source, based on the fault detection strategy and the operating status. Thus, the energy storage power source in this embodiment can determine different fault detection strategies based on its different paralleling orders, enabling rapid fault detection without human intervention.

[0075] In some embodiments, see [link to relevant documentation] in some possible implementations. Figure 3 , Figure 3 This is an optional flowchart illustrating the fault detection method provided in an embodiment of this application, based on... Figure 1 , Figure 1 S103 in the code can be updated to S301 and S302, which will combine Figure 3 The steps shown are explained.

[0076] In S301, if the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is the first-end energy storage power supply, then the energy storage power supply is determined to be a paralleling fault power supply.

[0077] In some embodiments, where the current paralleling sequence indicates that the energy storage power supply is the first-end energy storage power supply, the fault detection strategy can be determined as follows: Based on whether the energy storage power supply has an output, determine whether a fault has occurred and whether the paralleling sequence of the parallel power supply group should be updated. That is, the presence or absence of output from the energy storage power supply can determine whether it is a paralleling faulty power supply. This is because the current parallel power supply group is in a power paralleling output state. Non-first-end energy storage power supplies in the parallel power supply group need to track the current or voltage phase of the first energy storage power supply before outputting their own current or voltage. Therefore, when the first-end energy storage power supply has no output (i.e., no current or voltage), the non-first-end energy storage power supplies cannot track the current or voltage phase of the first-end energy storage power supply and thus have no output. Therefore, when it is determined that the first-end energy storage power supply has no output, it can be determined that the first-end energy storage power supply is a paralleling faulty power supply, and the paralleling sequence of the parallel power supply group needs to be updated.

[0078] In S302, when the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is a non-first-end energy storage power supply, it is determined whether overload protection occurs based on the load power; if overload protection occurs, it is determined that the energy storage power supply is a paralleling fault power supply.

[0079] In some embodiments, when the current paralleling sequence indicates that the energy storage power source is not the first-end energy storage power source, the fault detection strategy can be determined as follows: if it is determined that the energy storage power source has no output and overload protection has occurred, it can be determined that the energy storage power source has failed, and the paralleling sequence of the parallel power source group needs to be re-determined; if it is determined that the energy storage power source has no output but no overload protection has occurred, it can be considered that although the energy storage power source has failed, the paralleling sequence of the parallel power source group does not need to be re-determined. This is because when the output of the first-end energy storage power source is normal and the non-first-end energy storage power source has no output, other energy storage power sources can track the output of the first-end energy storage power source to achieve parallel output. Therefore, it is necessary to jointly determine whether the non-first-end energy storage power source is a paralleling faulty power source by the operating status of the energy storage power source and whether overload protection has occurred.

[0080] In some embodiments, load power refers to the power of the load device connected to the parallel power supply group. In practical applications, whether overload protection occurs is determined based on the load power and the total power of the parallel power supply group. For example, if the total power of the parallel power supply group is 2000KW and it includes four energy storage power sources, each with a power allocation of 500KW, when the non-leading energy storage power sources have no output, the total power of the parallel power supply group can be 1500KW. When the load power is 1000KW, although the non-leading energy storage power sources have no output, the load power determines that no overload protection has occurred, meaning the total power of the parallel power supply group is greater than the load power. Therefore, the parallel power supply group can still operate without needing to update its paralleling sequence. When the load power is 1600KW, the total power of the parallel power supply group is less than the load power, causing the parallel power supply group to trigger overload protection and become inoperable. Therefore, the paralleling sequence of the parallel power supply group needs to be updated.

[0081] In some embodiments, non-first-end energy storage power supplies may include intermediate energy storage power supplies and last-end energy storage power supplies. For last-end energy storage power supplies, after determining that the last-end energy storage power supply is a parallel operation failure power supply, the control module in the last-end energy storage power supply can disconnect its own inverter output. In some embodiments, disconnecting the inverter output of the last-end energy storage power supply can be achieved by turning off the MOSFET. In this way, when it is determined that the last-end energy storage power supply is a parallel operation failure power supply, the inverter output of the last-end energy storage power supply can be disconnected, and then the parallel operation sequence of the energy storage power supplies other than the last-end energy storage power supply in the parallel power supply group can be re-determined by the client.

[0082] For intermediate energy storage power supplies, before determining whether overload protection has occurred, it is necessary to control the charging and discharging relays of the energy storage power supply to be in the closed state and to shut down the inverter output of the energy storage power supply.

[0083] Therefore, the fault detection method provided in this application embodiment further includes: when the working state indicates that the energy storage power supply has no output and the current parallel operation sequence indicates that the energy storage power supply is an intermediate energy storage power supply, controlling the charging and discharging relay of the energy storage power supply to be in a closed state and shutting down the inverter output of the energy storage power supply; and determining that the energy storage power supply is a parallel operation fault power supply in the event of an overload protection.

[0084] In some embodiments, when the energy storage power source is determined to be an intermediate energy storage power source, similar to the terminal energy storage power source, it is necessary to jointly determine whether the intermediate energy storage power source is a parallel operation failure power source by considering its operating status and whether overload protection has occurred. Unlike the terminal energy storage power source, because the intermediate energy storage power source is located in the middle of the parallel power supply group, directly disconnecting its inverter output may result in no output from the terminal energy storage power source. Therefore, when the operating status indicates that the energy storage power source has no output and the current parallel sequence indicates that the energy storage power source is an intermediate energy storage power source, it is necessary to first control the charging / discharging relay of the energy storage power source to be in the closed state and shut down its inverter output. This ensures that the intermediate energy storage power source acts as a pathway, allowing energy storage power sources preceding the intermediate energy storage power source to bypass it and output to energy storage power sources following it. Then, it is determined whether overload protection has occurred based on the load power. If overload protection is detected, the energy storage power source is determined to be a parallel operation failure power source, and the parallel sequence of the parallel power supply group needs to be re-determined by the client. If it is confirmed that no overload protection has occurred, it can be determined that the energy storage power supply is not a parallel power supply failure. In this case, it is not necessary to re-determine the parallel power supply sequence through the client.

[0085] Thus, in this embodiment, when the working state indicates that the energy storage power supply has no output and the current parallel sequence indicates that the energy storage power supply is the first-end energy storage power supply, the energy storage power supply is determined to be a parallel faulty power supply; when the working state indicates that the energy storage power supply has no output, the current parallel sequence indicates that the energy storage power supply is the last-end energy storage power supply, and overload protection occurs, the energy storage power supply is determined to be a parallel faulty power supply; when the working state indicates that the energy storage power supply has no output and the current parallel sequence indicates that the energy storage power supply is an intermediate energy storage power supply, the charging and discharging relay of the energy storage power supply is controlled to be in the closed state and the inverter output of the energy storage power supply is turned off; when overload protection occurs, the energy storage power supply is determined to be a parallel faulty power supply. In this way, this embodiment can determine different fault detection strategies according to different parallel sequences, improving the efficiency of detecting energy storage power supply faults.

[0086] In some embodiments, see [link to relevant documentation] in some possible implementations. Figure 4 , Figure 4 This is an optional flowchart illustrating the fault detection method provided in an embodiment of this application, based on... Figure 1 , Figure 1 The fault detection method following S103 may also include S401, which combines... Figure 4 The steps shown are explained.

[0087] In S401, the fault detection result of the energy storage power supply is sent to the client.

[0088] In some embodiments, once the energy storage power source in the parallel power supply group determines its own fault detection result, it can send its own fault detection result to the client. The client can then eliminate the parallel fault in the parallel power supply group based on the fault detection result of the energy storage power source.

[0089] In some embodiments, the client may troubleshoot parallel power failures in the parallel power supply group by first identifying the normal energy storage power source in the parallel power supply group based on the fault detection results; then updating the paralleling sequence of the normal energy storage power source based on its status data; and finally allocating power to the normal energy storage power source based on the updated paralleling sequence.

[0090] In some embodiments, when an energy storage power source sends a fault detection result, it may carry its own identification code, which is used to distinguish it from other energy storage power sources. In some embodiments, this identification code may be a unique device identifier. Thus, when the client receives a fault detection result from each energy storage power source, it can determine which energy storage power source's fault detection result is based on the identification code.

[0091] Thus, in this embodiment of the application, after determining the fault detection result of the energy storage power supply, the fault detection result can be sent to the client. In this way, the client can troubleshoot parallel power supply group faults based on the fault detection result of the energy storage power supply, achieving rapid fault troubleshooting without manual intervention.

[0092] In some embodiments, this application also provides a troubleshooting method. This troubleshooting method can be applied to a client installed in an electronic device, which includes, but is not limited to, fixed devices and / or mobile devices. For example, the electronic device includes, but is not limited to, a personal computer (PC) or a server, where the server can be a cloud server or a regular server. The mobile device includes, but is not limited to, one or more of a mobile phone, tablet computer, or wearable device. Figure 5 This is a flowchart of a troubleshooting method according to an embodiment of this application, such as... Figure 5 As shown, the process may include:

[0093] In S501, a fault detection result is received from at least one of the multiple energy storage power sources; the fault detection result is used to characterize whether the energy storage power source is a parallel-operated fault power source.

[0094] In some embodiments, each of the plurality of energy storage power sources is equipped with a communication module, through which a communication link can be established with an electronic device performing the fault diagnosis method of this application. This communication module may be a Bluetooth module and / or a Wireless Fidelity (Wi-Fi) module. When each energy storage power source establishes a communication link with the electronic device, the energy storage power source can send fault detection results to the client through the communication module.

[0095] In S502, the parallel operation sequence of the multiple normal energy storage power sources is updated based on the status data of each of the multiple normal energy storage power sources.

[0096] Here, a normal energy storage power source refers to any energy storage power source other than the one that failed in parallel operation among the multiple energy storage power sources. In some embodiments, multiple normal energy storage power sources can be determined based on the fault detection results sent by at least one of the energy storage power sources. For example, the energy storage power sources in a parallel power source group include energy storage power source A, energy storage power source B, energy storage power source C, and energy storage power source D. When the fault detection results sent by energy storage power source A and energy storage power source B indicate that both energy storage power source A and energy storage power source B are parallel operation faulty power sources, the client can determine that the normal energy storage power sources are energy storage power source C and energy storage power source D based on the fault detection results sent by energy storage power source A and energy storage power source B. In some embodiments, after determining the normal energy storage power sources, the status data of the normal energy storage power sources can be obtained. This status data is used to determine the operating status of the normal energy storage power source; in some embodiments, this status data can be a level signal.

[0097] In some embodiments, updating the parallel operation sequence of multiple normal energy storage power sources can be achieved in the following ways:

[0098] In S5021, a first-end energy storage power source is determined from the plurality of normal energy storage power sources based on the status data of each of the normal energy storage power sources.

[0099] Here, the first-end energy storage power source refers to the energy storage power source located at the beginning of a group of energy storage power sources. This first-end energy storage power source has no output at its input terminal but has an output at its output terminal. (See attached image) Figure 2 As shown, among energy storage power sources A, B, C, and D, only energy storage power source A has no output at its input terminal and an output at its output terminal. Therefore, energy storage power source A can be considered the first-in-line energy storage power source among the four. Since the state data of each energy storage power source can determine whether there is an input at its input terminal and an output at its output terminal, the first-in-line energy storage power source can be determined from among the multiple normal energy storage power sources based on the state data of each normal energy storage power source.

[0100] In S5022, the parallel operation sequence of the plurality of other energy storage power sources is determined based on the status data of each other energy storage power source and the status data of the first-end energy storage power source; the other energy storage power sources are the normal energy storage power sources other than the first-end energy storage power source among the plurality of normal energy storage power sources.

[0101] In some embodiments, when determining the parallel operation sequence of multiple other energy storage power sources, a shutdown command can be sent to the first leading energy storage power source. This shutdown command instructs the first leading energy storage power source to disable its own parallel operation function. Because the energy storage power sources continuously transmit status data in real time, it is possible to determine whether the first leading energy storage power source has disabled its parallel operation function based on its status data. If the first leading energy storage power source has disabled its parallel operation function, the leading energy storage power source among the multiple other energy storage power sources can be determined based on the status data of each other energy storage power source. Then, the steps of shutting down the leading energy storage power sources and determining the leading energy storage power sources are repeated. The order in which the leading energy storage power sources are determined is used as the parallel operation sequence of the multiple other energy storage power sources.

[0102] In practical applications, determining the parallel operation sequence of multiple other energy storage power sources can include:

[0103] In response to the shutdown event of the first primary energy storage power source, an energy storage power source set including each of the other energy storage power sources is constructed; based on the status data of each energy storage power source in the energy storage power source set, a second primary energy storage power source is sequentially determined from the energy storage power source set and the second primary energy storage power source is removed from the energy storage power source set until the energy storage power source set is empty; based on the removal order of each of the second primary energy storage power sources, the parallel operation sequence of each of the other energy storage power sources is determined.

[0104] In some embodiments, the state data of the energy storage power supply also includes the input signal phase and the output signal phase. Since the energy storage power supply is an inverter output, meaning it outputs alternating current (AC), the signal phase reflects the physical quantity of the AC state at any given moment. Different energy storage power supplies output different signal phases. Therefore, the energy storage power supply receiving the output signal of the first-end energy storage power supply can be determined based on the input signal phase of the first-end energy storage power supply. Specifically, based on the input signal phase of each other energy storage power supply and the output signal phase of the first-end energy storage power supply, the energy storage power supply receiving the output signal of the first-end energy storage power supply is determined. This energy storage power supply can then be designated as the energy storage power supply with the second position among multiple energy storage power supplies. This process is repeated to determine the position of each energy storage power supply, thereby determining the parallel operation sequence of the multiple energy storage power supplies.

[0105] In practical applications, the input signal phase of an energy storage power source includes the input voltage signal phase; the output signal phase of an energy storage power source includes the output voltage signal phase; determining the parallel operation sequence of multiple other energy storage power sources can include:

[0106] Among other energy storage power sources whose parallel operation sequence has not been determined, the energy storage power source whose input voltage signal phase is the same as the output voltage signal phase of the terminal energy storage power source is determined as the next energy storage power source with a determined parallel operation sequence after the terminal energy storage power source, until all of the other energy storage power sources have a determined parallel operation sequence; wherein, the terminal energy storage power source is the last energy storage power source among the energy storage power sources with a determined parallel operation sequence; the energy storage power sources with a determined parallel operation sequence include the first terminal energy storage power source.

[0107] Thus, the embodiments of this application can receive fault detection results sent by the energy storage power source, and based on the fault detection...

[0108] The test results will identify the energy storage power supply with the parallel operation failure. This will be removed from the multiple energy storage power supplies to obtain multiple normal energy storage power supplies. Then, based on the status data of each normal energy storage power supply, the system will be updated.

[0109] The parallel operation sequence of multiple normal energy storage power sources is determined. This allows for rapid updating of the parallel operation sequence of multiple normal energy storage power sources.

[0110] The following describes the application of the fault detection and troubleshooting method provided in the embodiments of this application in real-world scenarios.

[0111] Use. See also Figures 6a to 6c , Figure 6a This is an optional flowchart illustrating the fault detection and troubleshooting method for the first energy storage power source provided in this application embodiment. Figure 6b This is the last embodiment provided in this application.

[0112] A schematic diagram of an optional fault detection and troubleshooting method for an energy storage power supply. Figure 6c This is an optional flowchart illustrating a fault detection and troubleshooting method for an intermediate energy storage power source provided in this application embodiment. (The text will be combined with...) Figures 6a to 6c The steps shown are explained.

[0113] The five-step process for fault detection and troubleshooting when the first energy storage power source in a parallel power supply group fails is as follows: Figure 6a As shown:

[0114] In S601, if the first energy storage power source is determined to have failed, a first fault code is sent to the client.

[0115] Here, if the first energy storage power source (equivalent to the first-end energy storage power source in the above embodiment) fails, since the subsequent energy storage power sources are all based on the first energy storage power source as a reference, the parallel operation will immediately end and the first fault code will be issued (equivalent to the fault detection result of the energy storage power source being a parallel operation failure power source in the above embodiment).

[0116] In S602, disconnect the first energy storage power source.

[0117] Here, after the first energy storage power source sends the first fault code to the client, it can disconnect itself from other energy storage power sources in the parallel power group.

[0118] 5. In S603, the client controls the other energy storage power sources in the parallel power group, excluding the first energy storage power source.

[0119] The paralleling sequence was redefined, and power was allocated.

[0120] Here, after disconnecting the first energy storage power source, the client can reconnect the remaining energy storage units in parallel. By using the first-unit lookup method, the second unit becomes the first, the third unit becomes the second, and so on, and then paralleling and power distribution are performed.

[0121] The procedure for fault detection and troubleshooting when the last energy storage power source in a parallel power supply group fails is as follows: Figure 6b As shown:

[0122] In S604, if it is determined that the last energy storage power source has failed, it is determined whether overload protection has occurred. If overload protection has occurred, S605 is executed; otherwise, S606 is executed.

[0123] In S605, the connection of the last energy storage power source (equivalent to the end energy storage power source in the above embodiment) is disconnected, and the client re-determines the paralleling order of the other energy storage power sources in the parallel power group except for the last energy storage power source, and performs power allocation.

[0124] In S606, operation continues based on the initial parallel sequence.

[0125] The procedure for fault detection and troubleshooting when the intermediate energy storage power supply in a parallel power group fails is as follows: Figure 6c As shown:

[0126] In S607, it is determined whether the intermediate energy storage power supply has failed. If a failure occurs, S608 is executed; otherwise, S610 is executed.

[0127] In S608, fault codes are reported to the client.

[0128] In S609, the intermediate energy storage power supply is controlled to not output AC voltage, and the charging and discharging relay is kept open.

[0129] Here, by controlling the intermediate energy storage power supply to not output AC voltage and keeping the charge / discharge relay open, the intermediate energy storage power supply can act as a path, allowing the energy storage power supply located in front of the intermediate energy storage power supply to bypass the intermediate energy storage power supply and charge the energy storage power supply behind it.

[0130] In S610, the next energy storage power supply of the intermediate energy storage power supply determines whether the voltage of the intermediate energy storage power supply is detected; if the voltage of the intermediate energy storage power supply is detected, S611 is executed, and if it is not detected, S612 is executed.

[0131] In S611, operation continues according to the initial parallel sequence.

[0132] Here, if the next energy storage power source of the intermediate energy storage power source can detect the voltage of the intermediate energy storage power source, it means that the intermediate energy storage power source has not failed and can continue to work according to the initial paralleling sequence.

[0133] In step S612, it is determined whether overload protection has occurred. If overload protection has occurred, step S613 is executed; otherwise, step S611 is executed.

[0134] In S613, fault codes are reported to the client.

[0135] In S614, the client re-determines the paralleling sequence of other energy storage power sources in the parallel power group, excluding the intermediate energy storage power source, and allocates power accordingly.

[0136] In this way, the energy storage power supply in this embodiment can determine different fault detection strategies according to its different parallel operation sequence, so that faults can be detected quickly without human intervention; then the parallel operation sequence of the normal energy storage power supply is updated, which also realizes the rapid elimination of faults without human intervention.

[0137] This application provides a fault detection device. Figure 7 This is a schematic diagram of the composition of the fault detection device 700 according to an embodiment of this application, as shown below. Figure 7 As shown, the device includes: an acquisition unit 701, a first determination unit 702, a second determination unit 703, and a sending unit 704, wherein:

[0138] The acquisition unit 701 is used to acquire the working status of the energy storage power supply and the current paralleling order of the energy storage power supply in the parallel power supply group;

[0139] The first determining unit 702 is used to determine a fault detection strategy based on the current paralleling sequence;

[0140] The second determining unit 703 is used to determine the fault detection result of the energy storage power supply according to the fault detection strategy and the working state; the fault detection result is used to characterize whether the energy storage power supply is a parallel fault power supply.

[0141] In some embodiments, the second determining unit 703 is further configured to determine that the energy storage power supply is a parallel operation failure power supply when the operating state indicates that the energy storage power supply has no output and the current parallel operation sequence indicates that the energy storage power supply is the first-end energy storage power supply.

[0142] In some embodiments, the second determining unit 703 is further configured to determine whether overload protection has occurred based on the load power when the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is a non-first-end energy storage power supply; and in the case of overload protection, determine that the energy storage power supply is a paralleling fault power supply.

[0143] In some embodiments, the non-first-end energy storage power supply includes an intermediate energy storage power supply; the second determining unit 703 is further configured to, when the working state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is an intermediate energy storage power supply, control the charging and discharging relay of the energy storage power supply to be in a closed state and shut down the inverter output of the energy storage power supply.

[0144] In some embodiments, the sending unit 704 is used to send the fault detection result of the energy storage power supply to the client; the client is used to eliminate parallel faults in the parallel power supply group based on the fault detection result.

[0145] This application provides a troubleshooting device. Figure 8 This is a schematic diagram of the composition of the fault-solving device 800 according to an embodiment of this application, as shown below. Figure 8 As shown, the device includes: a receiving unit 801 and an updating unit 802, wherein:

[0146] The receiving unit 801 is used to receive a fault detection result sent by at least one of the multiple energy storage power sources; the fault detection result is used to characterize whether the energy storage power source is a parallel-operated fault power source.

[0147] The updating unit 802 is used to update the paralleling sequence of the multiple normal energy storage power sources according to the status data of each of the multiple normal energy storage power sources; the status data is used to determine the operating status of the normal energy storage power source; the normal energy storage power source is the energy storage power source other than the paralleling fault power source among the multiple energy storage power sources.

[0148] In some embodiments, the updating unit 802 is further configured to determine a first-end energy storage power source among the plurality of normal energy storage power sources based on the status data of each of the normal energy storage power sources; and to determine the parallel operation order of the plurality of other energy storage power sources based on the status data of each other energy storage power source and the status data of the first-end energy storage power source; wherein the other energy storage power sources are normal energy storage power sources other than the first-end energy storage power source among the plurality of normal energy storage power sources.

[0149] This application provides a fault detection device. Figure 9 This is a schematic diagram of the composition structure of the fault detection device 900 according to an embodiment of this application, as shown below. Figure 9 As shown, the device includes: a processor 901, a communication interface 902, and a memory 903, wherein:

[0150] The processor 901 typically controls the overall operation of the computer device 900, which may include implementing the fault detection method provided in the embodiments of this application, for example, such as... Figures 1 to 4 The method shown.

[0151] Communication interface 902 enables computer devices to communicate with other terminals or servers over a network.

[0152] The memory 903 is configured to store instructions and applications executable by the processor 901, and can also cache data to be processed or already processed (e.g., image data, audio data, voice communication data, and video communication data) in the processor 901 and various modules in the computer device 900. It can be implemented using flash memory or random access memory (RAM). Data transfer between the processor 901, the communication interface 902, and the memory 903 can be performed via bus 904.

[0153] This application provides a troubleshooting device. Figure 10 This is a schematic diagram of the composition and structure of the troubleshooting device 1000 according to an embodiment of this application, as shown below. Figure 10 As shown, the device includes: a processor 1001, a communication interface 1002, and a memory 1003, wherein:

[0154] The processor 1001 typically controls the overall operation of the computer device 900, which may include implementing the troubleshooting methods provided in the embodiments of this application, for example... Figure 5 The method shown.

[0155] Communication interface 1002 enables computer devices to communicate with other terminals or servers via a network.

[0156] The memory 1003 is configured to store instructions and applications executable by the processor 1001, and can also cache data to be processed or already processed (e.g., image data, audio data, voice communication data, and video communication data) in the processor 1001 and various modules in the computer device 1000. It can be implemented using flash memory or random access memory (RAM). Data transfer between the processor 1001, the communication interface 1002, and the memory 1003 can be performed via bus 1004.

[0157] This application provides a computer program product or computer program that includes computer instructions stored in a readable storage medium. A processor of a computer device reads the computer instructions from the readable storage medium and executes the computer instructions, causing the computer device to perform the fault detection or fault resolution method described in this application.

[0158] This application provides a readable storage medium storing executable instructions. When these executable instructions are executed by a processor, they cause the processor to execute the fault detection or fault resolution method provided in this application. For example... Figure 1 The method is shown in Figure 6.

[0159] In some possible implementations, the readable storage medium can be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or it can be a device that includes one or any combination of the above-mentioned memories.

[0160] In some possible implementations, executable instructions may take the form of programs, software, software modules, scripts, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as stand-alone programs or as modules, components, subroutines, or other units suitable for use in a computing environment.

[0161] As an example, executable instructions may, but do not necessarily, correspond to files in a file system. They may be stored as part of a file that holds other programs or data, for example, in one or more scripts in a Hyper Text Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple collaborating files (e.g., a file that stores one or more modules, subroutines, or code sections).

[0162] As an example, executable instructions can be deployed to execute on a single computing device, or on multiple computing devices located in one location, or on multiple computing devices distributed across multiple locations and interconnected via a communication network.

[0163] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of this application are included within the scope of protection of this application.

Claims

1. A fault detection method, characterized in that, The method is applied to the energy storage power supply within a parallel power supply group, wherein the parallel power supply group is in a power parallel output state, and the method includes: The operating status of the energy storage power source and the current paralleling order of the energy storage power sources in the parallel power source group are obtained; wherein, the energy storage power source has both an input terminal and an output terminal, and the current paralleling order is determined according to the connection order of the input and output terminals of the energy storage power source in the parallel power source group with the input and output terminals of other energy storage power sources in the parallel power source group; the output terminal of the previous energy storage power source is connected to the input terminal of the next energy storage power source; A fault detection strategy is determined based on the current parallel operation sequence; wherein, different current parallel operation sequences determine different fault detection strategies. Based on the fault detection strategy and the operating state, the fault detection result of the energy storage power supply is determined; the fault detection result is used to characterize whether the energy storage power supply is a parallel-operated fault power supply. The step of determining the fault detection result of the energy storage power supply based on the fault detection strategy and the operating state includes: when the operating state indicates that the energy storage power supply has no output and the current parallel sequence indicates that the energy storage power supply is not the first-end energy storage power supply, controlling the charging and discharging relay of the energy storage power supply to be in the closed state and shutting down the inverter output of the energy storage power supply, and determining whether overload protection has occurred based on the load power and the total power of the parallel power supply group; wherein, in the power parallel output state, the non-first-end energy storage power supply tracks the current or voltage phase of the first-end energy storage power supply for output; in the case of overload protection, determining that the energy storage power supply is a parallel fault power supply; the load power refers to the power of the load equipment connected to the parallel power supply group.

2. The method according to claim 1, characterized in that, The step of determining the fault detection result of the energy storage power supply based on the fault detection strategy and the operating state further includes: If the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is the first-end energy storage power supply, then the energy storage power supply is determined to be a paralleling fault power supply.

3. The method according to any one of claims 1 to 2, characterized in that, The method further includes: The fault detection results of the energy storage power supply are sent to the client; the client is used to troubleshoot parallel power supply faults in the parallel power supply group based on the fault detection results.

4. A troubleshooting method, characterized in that, The method includes: The system receives a fault detection result from at least one of multiple energy storage power sources; the fault detection result is used to characterize whether the energy storage power source is a parallel operation fault power source; wherein, the energy storage power source has both an input terminal and an output terminal, and the current parallel operation order is determined according to the connection order of the input and output terminals of the energy storage power source in the parallel power source group with the input and output terminals of other energy storage power sources in the parallel power source group; the output terminal of the previous energy storage power source is connected to the input terminal of the next energy storage power source; the parallel power source group is in a power parallel output state; Based on the status data of each of the multiple normal energy storage power sources, the paralleling sequence of the multiple normal energy storage power sources is updated; the status data is used to determine the operating status of the normal energy storage power source; the normal energy storage power source is the energy storage power source other than the paralleling fault power source among the multiple energy storage power sources. The fault detection result is determined based on the fault detection strategy and the operating state of the energy storage power supply. The fault detection strategy is determined based on the current paralleling sequence of the energy storage power supply, and different current paralleling sequences determine different fault detection strategies. When the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is a non-leading energy storage power supply, the charging and discharging relay of the energy storage power supply is in the closed state and the inverter output of the energy storage power supply is turned off. The energy storage power supply is determined as a paralleling fault power supply based on the load power and the total power of the paralleling power supply group to determine the overload protection condition. The load power refers to the power of the load equipment connected to the paralleling power supply group. In the power paralleling output state, the non-leading energy storage power supply tracks the current or voltage phase of the leading energy storage power supply for output.

5. The method according to claim 4, characterized in that, The step of updating the parallel operation sequence of the multiple normal energy storage power sources based on the status data of each of the multiple normal energy storage power sources includes: Based on the status data of each of the normal energy storage power sources, a first-end energy storage power source is determined among the plurality of normal energy storage power sources. Based on the status data of each other energy storage power source and the status data of the first-end energy storage power source, the parallel operation sequence of the multiple other energy storage power sources is determined; the other energy storage power sources are the normal energy storage power sources other than the first-end energy storage power source among the multiple normal energy storage power sources.

6. A fault detection device, characterized in that, The device includes: An acquisition unit is used to acquire the operating status of the energy storage power supply and the current paralleling order of the energy storage power supplies in the parallel power supply group; wherein, the energy storage power supply has both an input terminal and an output terminal, and the current paralleling order is determined according to the connection order of the input and output terminals of the energy storage power supply in the parallel power supply group with the input and output terminals of other energy storage power supplies in the parallel power supply group; the output terminal of the previous energy storage power supply is connected to the input terminal of the next energy storage power supply; the parallel power supply group is in a power paralleling output state; The first determining unit is configured to determine a fault detection strategy based on the current parallel operation sequence; wherein different current parallel operation sequences determine different fault detection strategies. The second determining unit is used to determine the fault detection result of the energy storage power supply based on the fault detection strategy and the operating state; the fault detection result is used to characterize whether the energy storage power supply is a parallel fault power supply. The second determining unit is further configured to, when the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is a non-first-end energy storage power supply, control the charging and discharging relay of the energy storage power supply to be closed and shut down the inverter output of the energy storage power supply, and determine whether overload protection has occurred based on the load power and the total power of the parallel power supply group; wherein, in the power paralleling output state, the non-first-end energy storage power supply tracks the current or voltage phase of the first-end energy storage power supply for output; in the case of overload protection, determine that the energy storage power supply is a paralleling fault power supply; the load power refers to the power of the load equipment connected to the parallel power supply group.

7. A troubleshooting device, characterized in that, The device includes: A receiving unit is configured to receive a fault detection result sent by at least one of a plurality of energy storage power sources; the fault detection result is used to characterize whether the energy storage power source is a parallel operation fault power source; wherein, the energy storage power source has both an input terminal and an output terminal, and the current parallel operation order is determined according to the connection order of the input and output terminals of the energy storage power source in the parallel power source group with the input and output terminals of other energy storage power sources in the parallel power source group; the output terminal of the preceding energy storage power source is connected to the input terminal of the following energy storage power source; the parallel power source group is in a power parallel output state; An update unit is used to update the paralleling sequence of the multiple normal energy storage power sources based on the status data of each of the multiple normal energy storage power sources; the status data is used to determine the operating status of the normal energy storage power source; the normal energy storage power source is the energy storage power source other than the paralleling fault power source among the multiple energy storage power sources. The fault detection result is determined based on the fault detection strategy and the operating state of the energy storage power supply. The fault detection strategy is determined based on the current paralleling sequence of the energy storage power supply, and different current paralleling sequences determine different fault detection strategies. When the operating state indicates that the energy storage power supply has no output and the current paralleling sequence indicates that the energy storage power supply is a non-leading energy storage power supply, the charging and discharging relay of the energy storage power supply is in the closed state and the inverter output of the energy storage power supply is turned off. The energy storage power supply is determined as a paralleling fault power supply based on the load power and the total power of the paralleling power supply group to determine the overload protection condition. The load power refers to the power of the load equipment connected to the paralleling power supply group. In the power paralleling output state, the non-leading energy storage power supply tracks the current or voltage phase of the leading energy storage power supply for output.

8. A storage medium, characterized in that, The storage medium stores executable instructions, which, when executed by a processor, implement the method steps of any one of claims 1 to 3, or implement the method steps of any one of claims 4 to 5.

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