A method for detecting a configuration of a bus chamber, a controller and an energy storage system

Abstract

The application discloses a kind of energy storage system configuration detection method, controller and energy storage system, it is related to energy storage system control technical field.The method comprises: according to the preset bus chamber order, configuration detection is successively executed to N bus chambers;During the process of executing configuration detection to target bus chamber, according to the preset energy storage converter order, the multiple energy storage converters corresponding to bus chamber are started in turn, according to the comparison result of the starting condition of energy storage converter and transformer grid side current and preset value, whether the configuration of target bus chamber is correct is determined.The application can automatically execute bus chamber configuration detection, effectively eliminate subjective error and uncertainty of artificial investigation, improve the accuracy and reliability of bus chamber configuration detection in energy storage system.

Description

Technical Field

[0001] This application relates to the field of energy storage system control technology, specifically to an energy storage system configuration detection method, controller, and energy storage system. Background Technology

[0002] Large-capacity energy storage systems often adopt a modular energy storage architecture with multiple transformers and multiple combiner chambers to achieve flexible system expansion and power zoning.

[0003] Each combiner room contains a transformer, through which multiple energy storage batteries collect electrical energy, which is then stepped up by the transformer and connected to the power grid. To ensure safe and efficient energy transmission, the physical wiring corresponding to the combiner room in the energy storage system must be strictly matched with the software logic configuration. If there is a deviation between the physical electrical wiring and the software configuration mapping, it will lead to disordered energy transmission paths and cause serious electrical safety hazards.

[0004] During the commissioning and maintenance phases of energy storage systems, manual verification of the consistency between physical electrical wiring and software configuration is crucial. This method is not only inefficient but also highly susceptible to configuration errors due to human negligence. Summary of the Invention

[0005] In view of this, this application provides a method, controller and energy storage system for configuration detection of energy storage system, which can solve the problems of low efficiency and insufficient reliability in configuration detection of multi-combiner energy storage system architecture.

[0006] To solve the above problems, the technical solution provided in this application is as follows:

[0007] The first aspect of this application provides a method for detecting the configuration of an energy storage system, including:

[0008] According to the preset manifold order, configuration tests are performed on N manifolds in sequence, where N≥2;

[0009] During the configuration test of the target combiner room, the multiple energy storage converters corresponding to the target combiner room are started one by one according to the preset energy storage converter sequence.

[0010] If all energy storage converters fail to start, or if the grid-side current of the transformer in the target combiner room is still less than a preset value after sending a full-power command to all normally started energy storage converters, the target combiner room is determined to be misconfigured.

[0011] In an optional embodiment, the step of starting multiple energy storage converters corresponding to the target combiner room one by one according to a preset order of energy storage converters, and determining that the target combiner room is misconfigured if all energy storage converters fail to start, or if the grid-side current of the transformer in the target combiner room is still less than a preset value after sending a full-power command to all normally started energy storage converters, includes:

[0012] According to the preset energy storage converter order, send a start command to the energy storage converter that is currently to be started;

[0013] If the energy storage converter fails to start, and the iteration through all energy storage converters has ended, it is determined that the target combiner room is configured incorrectly; if the iteration through all energy storage converters has not ended, the process returns to the step of sending a start command to the energy storage converter to be started according to the preset energy storage converter sorting.

[0014] When the energy storage converter is started normally, a full power command is sent to the energy storage converter, and the grid-side current of the transformer in the target combiner room is obtained;

[0015] If the grid-side current of the transformer in the target combiner room is less than a preset value, and the iteration of all energy storage converters has ended, it is determined that the target combiner room is configured incorrectly; if the iteration of all energy storage converters has not ended, the process returns to the step of sending a start command to the energy storage converter to be started according to the preset energy storage converter sorting.

[0016] In an optional embodiment, in the event of a startup failure of the energy storage converter, the following further method is included:

[0017] Record the energy storage converter that failed to start;

[0018] If the grid-side current of the transformer in the target junction room is less than a preset value, the method further includes:

[0019] Record the energy storage converter corresponding to the grid-side current of the transformer in the target combiner room being less than a preset value;

[0020] After determining that the target combiner room is misconfigured, the following steps are also included:

[0021] Summarize all records of the energy storage converter, generate and store the configuration detection record of the target combiner room;

[0022] If the target combiner room is confirmed to be configured correctly, delete all records of the energy storage converter.

[0023] In one optional embodiment, after starting up the multiple energy storage converters corresponding to the target combiner room one by one, the method further includes:

[0024] If at least one of the energy storage converters starts normally, and a full-power command is issued to the normally started energy storage converter, and the grid-side current of the transformer in the target combiner room is greater than or equal to a preset value, then the target combiner room is determined to be configured correctly.

[0025] In an optional embodiment, it further includes:

[0026] During the operation of the energy storage system, multi-dimensional monitoring data of each of the aforementioned junction chambers are acquired;

[0027] For each of the manifolds, if the multidimensional monitoring data indicates that the manifold has failed, the manifold will be shut down for protection; if the manifold has not failed, it will continue to operate.

[0028] In one optional embodiment, the multidimensional monitoring data is used to characterize the presence of transformer short-circuit faults, transformer grounding insulation faults, and transformer high-temperature faults in the junction room.

[0029] In one optional embodiment, acquiring multidimensional monitoring data for each of the manifolds includes:

[0030] The multidimensional monitoring data collected by the relay protection equipment corresponding to the junction room are acquired respectively. The multidimensional monitoring data includes: the current difference and voltage change characteristics on both sides of the transformer, the transformer grounding insulation data, and the transformer temperature data.

[0031] In an optional embodiment, if the multidimensional monitoring data characterizes a fault in the junction room, the method further includes:

[0032] Generate fault event information, which includes at least: the identifier of the junction room, the fault type, and the fault time;

[0033] The fault event information is stored and sent to the preset maintenance personnel terminal.

[0034] A second aspect of this application provides a controller, including a processor and a memory;

[0035] The memory is used to store programs, instructions, or code;

[0036] The processor is used to execute programs, instructions, or code in the memory to complete the energy storage system configuration detection method as described above.

[0037] A third aspect of this application provides an energy storage system, comprising: a controller and N combiner chambers, wherein N ≥ 2;

[0038] Each junction room is equipped with one transformer;

[0039] The low-voltage side of the transformer is connected to multiple energy storage converters, and the high-voltage side of the transformer is connected to the power grid.

[0040] The energy storage converter is connected to an energy storage battery on its DC side.

[0041] The controller is communicatively connected to each of the energy storage converters;

[0042] The controller is used to execute the energy storage system configuration detection method as described above.

[0043] This application provides a method for configuring and detecting an energy storage system. The method sequentially performs configuration checks on N combiner rooms according to a preset combiner room order. During the detection of the target combiner room, multiple energy storage converters are started one by one according to a preset energy storage converter order. The method then monitors whether the energy storage converters start normally and whether the grid-side current of the transformer in the target combiner room is less than a preset value after sending a full-power command to the normally started energy storage converters. If all energy storage converters fail to start, or if the grid-side current of the transformer in the target combiner room is less than the preset value after sending a full-power command to the normally started energy storage converters, the target combiner room is determined to be misconfigured. This orderly, sequential start-up and current feedback mechanism automatically verifies the consistency of physical electrical wiring and logical configuration without relying on manual verification, effectively avoiding configuration errors caused by human error and significantly improving the accuracy and reliability of combiner room configuration detection. Attached Figure Description

[0044] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0045] Figure 1 A flowchart illustrating a configuration detection method for an energy storage system provided in this application embodiment;

[0046] Figure 2 An energy storage system architecture diagram provided for an embodiment of this application;

[0047] Figure 3 A schematic diagram of the configuration and testing process for a single junction room provided in an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of an independent fault detection process for a junction room provided in an embodiment of this application;

[0049] Figure 5 This is a schematic diagram of a controller provided in an embodiment of this application. Detailed Implementation

[0050] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0051] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0052] The terms "first," "second," etc., used in the specification, 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. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0053] This application provides a method for detecting the configuration of an energy storage system, applied to the controller in an energy storage system. The method for detecting the configuration of an energy storage system according to this application will be described in detail below with reference to the accompanying drawings.

[0054] Reference Figure 1 , Figure 1 This is a flowchart illustrating a configuration detection method for an energy storage system provided in an embodiment of this application, as shown below. Figure 1 As shown in the embodiment of this application, an energy storage system configuration detection method may include steps 101 to 103, which are described in detail below.

[0055] 101: Perform configuration checks on N junction rooms sequentially according to the preset junction room order.

[0056] Where N represents the total number of combiner cells in the energy storage system, and N ≥ 2. In other words, this embodiment is applicable to energy storage system architectures with at least two combiner cells operating in parallel. Please refer to [link / reference]. Figure 2 The energy storage system architecture diagram shown is an example of an energy storage system including two combiner rooms. Each combiner room contains a transformer, and the low-voltage side of the transformer is connected to multiple energy storage converters. The DC side of each energy storage converter is connected to an energy storage battery. Figure 2(Taking the battery box as an example for illustration), the high-voltage side of the transformer is connected to the power grid. It should be noted that multiple energy storage converters and energy storage batteries can be integrated in the combiner room or installed outside the combiner room.

[0057] The preset combiner room sorting refers to the predefined testing order for each combiner room. This sorting can be determined by system designers based on factors such as the physical layout, electrical topology, and ease of maintenance of the energy storage system. For example, it can be arranged according to the combiner room's physical number in ascending order, or according to its physical location. During system initialization or when a testing task starts, the controller reads this preset combiner room sorting and generates an execution queue containing all combiners to be tested. This ordered traversal mechanism, based on the preset combiner room sorting, ensures that every combiner in the energy storage system undergoes comprehensive configuration consistency testing, avoiding misjudgments or missed detections due to disordered testing order.

[0058] 102: During the configuration test of the target combiner room, the multiple energy storage converters corresponding to the target combiner room are started one by one according to the preset energy storage converter sequence.

[0059] The target hub is one of N hubs. During the process of performing configuration checks on the N hubs in sequence according to the preset hub order, the hub currently performing the configuration check is the target hub.

[0060] 103: If all energy storage converters fail to start, or if the grid-side current of the transformer in the target combiner room is still less than the preset value after sending a full-power command to all normally started energy storage converters, the target combiner room configuration is determined to be incorrect.

[0061] The preset energy storage converter sequence is a start-up sequence set for all energy storage converters corresponding to the target combiner room. For example, the energy storage converters can be arranged in ascending order of their physical numbers, and the controller will test each energy storage converter one by one according to the preset energy storage converter sequence.

[0062] The controller does not start all energy storage converters at once. Instead, it sends a start command to the first energy storage converter in the preset energy storage converter sequence. If the energy storage converter fails to start or starts successfully and a full power command is sent to it, and the grid-side current of the transformer in the target combiner room is less than a preset value, then the next energy storage converter is started. This process continues until an energy storage converter starts normally, and a full power command is sent to that normally started energy storage converter. When the grid-side current of the transformer in the target combiner room is greater than or equal to a preset value, the traversal ends. Alternatively, the traversal continues until all energy storage converters have been traversed.

[0063] Among them, the failure to start the energy storage converter means that after sending a start command to the energy storage converter, the energy storage converter fails to start within the specified timeout period, or a fault code is received from the energy storage converter.

[0064] Normal startup of the energy storage converter means that after sending a startup command to the energy storage converter, the working status of the energy storage converter is obtained, and the working status indicates that the energy storage converter has switched from the startup state to the running state.

[0065] After the energy storage converter starts normally, a full power command is sent to the energy storage converter. The full power command instructs the energy storage converter to charge and discharge at the rated power to stimulate the maximum energy transfer state of the energy storage converter so as to generate a detectable current on the transformer grid side.

[0066] The grid-side current of the transformer in the target combiner room can be collected by a current transformer or relay protection device installed at the connection between the transformer and the grid. This current reflects the physical state of energy exchange between the transformer and the grid. The preset value can be set according to the transformer's hardware parameters, or it can be a preset minimum operating current, such as 5A. If the grid-side current of the transformer in the target combiner room is less than the preset value, it indicates that there is no effective energy transfer between the transformer and the grid.

[0067] The target combiner room is determined to be misconfigured if any of the following conditions are met.

[0068] Condition 1: If all energy storage converters corresponding to the target combiner room fail to start, it indicates that there is a serious equipment failure or control link interruption inside the target combiner room, resulting in no energy storage converter equipment having the ability to work. Therefore, it is directly determined that the target combiner room is misconfigured.

[0069] Condition 2: If some or all energy storage converters can start normally, the controller sends a full-power command to these normally started energy storage converters, enabling them to supply power to the grid. Under this condition, the transformer grid-side current is monitored in real time. If all normally started energy storage converters have executed the full-power command, but the transformer grid-side current is still consistently lower than the preset value, it indicates that although the energy storage converters themselves are working normally, energy has not been effectively transferred to the grid side through the transformer. This suggests a misalignment in the physical wiring between the AC output side of the energy storage converter and the low-voltage side of the transformer (e.g., connected to a transformer from another combiner room) or a connection fault in the transformer itself, thus determining that the target combiner room configuration is incorrect.

[0070] This embodiment constructs a hierarchical detection traversal process by pre-setting the combiner room sequence and the energy storage converter sequence, ensuring the orderliness and comprehensiveness of the detection process. At the same time, by starting the energy storage converter one by one and verifying with full power current, this mechanism can accurately identify hidden errors such as mismatch between physical wiring and logical configuration, and achieve objective quantitative judgment of configuration consistency. This not only replaces inefficient manual verification, but also effectively avoids electrical safety hazards caused by wiring errors, and significantly improves the commissioning efficiency and operational reliability of the energy storage system.

[0071] In one possible implementation, please refer to Figure 3 The schematic diagram shown illustrates the configuration testing process for a single combiner chamber. The configuration testing of the target combiner chamber includes the following steps 301-307:

[0072] 301: Send a start command to the energy storage converter to be started according to the preset energy storage converter order.

[0073] According to the preset energy storage converter sorting, starting from the first energy storage converter, the process traverses to determine the energy storage converter to be started and sends a start command to it.

[0074] 302: Is the energy storage converter starting normally?

[0075] After receiving a start command, the energy storage converter enters the start-up state. After a normal start-up, it will switch from the start-up state to the running state. The controller determines whether the energy storage converter has started normally by acquiring the working status of the energy storage converter. Specifically, the working status indicates that the energy storage converter has switched from the start-up state to the running state, and the controller determines that the energy storage converter has started normally.

[0076] There are several possible reasons for startup failure. If there is a communication error between the controller and the energy storage converter, the energy storage converter will not respond to the startup command, and the controller will not be able to obtain the operating status of the energy storage converter. If the controller fails to receive a notification that the energy storage converter has switched to the operating state within the specified timeout period, it will determine that the energy storage converter has failed to start. If the energy storage converter itself has a fault, the controller may receive a fault code sent by the energy storage converter, thus determining that the energy storage converter has failed to start. The above two methods for determining the startup failure of the energy storage converter are merely examples and are not limited to this embodiment.

[0077] If the energy storage converter fails to start, proceed with step 303.

[0078] If the energy storage converter starts normally, proceed with step 305.

[0079] 303: Has the traversal of all energy storage converters ended?

[0080] The controller determines whether the traversal of all energy storage converters has ended by judging whether the current energy storage converter is the last energy storage converter in the preset energy storage converter sequence. If the current energy storage converter is the last energy storage converter in the preset energy storage converter sequence, it is determined that the traversal of all energy storage converters has ended. If the current energy storage converter is not the last energy storage converter in the preset energy storage converter sequence, it is determined that the traversal of all energy storage converters has not ended.

[0081] If the traversal has not ended, return to step 301 above; if the traversal has ended, proceed to step 304.

[0082] If the traversal is not completed, it means that there are still energy storage converters in the target combiner room that have not yet performed the startup operation. The target combiner room may still establish the correct power path through the energy storage converters that have not performed the startup operation. Therefore, return to step 301 above to start the next energy storage converter and start a new round of startup and detection cycle. Through this iterative mechanism, all possible startup combinations of energy storage converters can be exhausted to ensure that no potentially correct topology connection is missed, thereby maximizing the detection coverage and accuracy.

[0083] 304: The target combiner room configuration is incorrect.

[0084] The process only proceeds if the grid-side current of the transformer is less than a preset value after a power supply command is sent to a normally started energy storage converter, or if the energy storage converter fails to start or if the grid-side current is less than a preset value after a power supply command is sent to a normally started energy storage converter. If the last energy storage converter also fails to start, it indicates that all energy storage converters have failed to start, or that the grid-side current of the transformer is less than a preset value after a power supply command is sent to a normally started energy storage converter. Therefore, if the last energy storage converter also fails to start, the target combiner room configuration is determined to be incorrect. This confirmation mechanism ensures that a final negative conclusion is reached only after all possible single-unit start-up combinations have been ruled out, avoiding misjudgments caused by single-device failures.

[0085] 305: Send a full-power command to the energy storage converter and obtain the grid-side current of the transformer in the target combiner room.

[0086] By sending a full-power command to the energy storage converter, the energy storage converter is made to operate at its rated power, so as to generate a detectable current signal on the grid side of the transformer. This current signal can be collected by the current transformer or relay protection equipment between the transformer and the grid.

[0087] 306: The grid-side current of the transformer is greater than or equal to the preset value.

[0088] If the grid-side current of the transformer is less than the preset value, then proceed to step 303 above; if the grid-side current of the transformer is greater than or equal to the preset value, then proceed to step 307.

[0089] 307: The target junction room configuration is confirmed to be correct.

[0090] After obtaining the grid-side current data of the transformer, it is compared with the preset value to determine the connectivity of the energy transmission path.

[0091] If the detected grid-side current of the transformer is less than the preset value, it indicates that although the energy storage converter has delivered full power, the electrical energy has not been effectively transmitted to the grid through the transformer. This suggests a physical wiring misalignment between the energy storage converter and the transformer, and the energy storage converter may be connected to the wrong transformer. In this case, step 303 above needs to be executed to determine whether the traversal has ended. If the traversal has ended, it means that all energy storage converters have failed to start, or that after sending a full-power command to the normally started energy storage converters, the grid-side current of the transformers is less than the preset value, confirming that the target combiner room configuration is incorrect. If the traversal has not ended, the next energy storage converter needs to be started, and a new round of start-up and detection cycle needs to begin.

[0092] If the detected grid-side current of the transformer is greater than or equal to the preset value, it indicates that the electrical energy output by the energy storage converter is effectively transmitted to the grid through the transformer, and the physical wiring between the energy storage converter and the transformer is correct, thus confirming that the target combiner room is configured correctly.

[0093] In other words, if at least one energy storage converter starts normally, and a full-power command is issued to the normally started energy storage converter, and the grid-side current of the transformer in the target combiner room is greater than or equal to a preset value, then the target combiner room configuration is determined to be correct. This determination mechanism is based on the effectiveness of energy transmission and is used to verify the consistency of electrical wiring and logic configuration. When the energy storage converter executes the full-power command, if the power transmission path is physically connected and the control logic is correct, the transformer grid side will generate a current response that meets expectations. By monitoring whether this current reaches the preset value, the connectivity status of the power circuit can be directly reflected.

[0094] The positive judgment logic for correct target combiner configuration and the aforementioned error judgment logic together form a complete closed loop for target combiner configuration detection. Based on the verification method using actual power response, not only is the matching relationship between a single energy storage converter and the target combiner confirmed, but the connectivity of the entire collection and conversion system is also indirectly verified. As long as at least one branch can output power normally and the effective current is captured by the grid-side current sensor or relay protection equipment, the possibility of physical wiring misalignment or mapping errors can be ruled out, thus clearly confirming the configuration status and ensuring the safety and reliability of the energy storage system during operation.

[0095] In one possible implementation, during the configuration detection of the target combiner room, energy storage converters that fail to start can be temporarily recorded, as well as those whose grid-side current is less than a preset value after responding to a full-power command. That is, before the traversal is complete, any energy storage converter with a grid-side current less than the preset value is recorded. If the target combiner room configuration is determined to be incorrect (i.e., the grid-side current is still less than the preset value after the traversal is complete), the recorded energy storage converters can be aggregated to generate and store a configuration detection record for the target combiner room. This allows maintenance personnel to accurately pinpoint the cause of the configuration error. If the target combiner room configuration is determined to be correct (i.e., the grid-side current is greater than or equal to the preset value before the traversal is complete), all previously temporarily recorded energy storage converters can be deleted to release storage space and avoid unnecessary data occupancy. Specifically, recording the energy storage converter's identifier can be used.

[0096] A startup failure of an energy storage converter indicates that the converter may have a hardware fault, communication interruption, or wiring error. When the controller determines that the current energy storage converter has failed to start, it triggers a recording action to obtain the unique identifier of the device, such as the device serial number, communication address number, or physical location number, and associates this identifier with the fault type of startup failure (startup failure).

[0097] In actual testing scenarios, some energy storage converters can start normally and enter the operating state, but because the topology of the transformer connected to their output circuit is mismatched with the software configuration, the output power cannot be correctly fed back to the grid side through the transformer. At this time, even if the energy storage converter has executed the full power output command, the current value on the grid side of the corresponding transformer is still lower than the preset value. The controller associates the identifier of the energy storage converter with the fault type of startup failure: it has started normally, but its output power has not been effectively transmitted to the grid through the transformer.

[0098] The two types of related data mentioned above can be stored in the internal storage medium in the form of structured log entries, forming a configuration detection record table containing fields such as fault occurrence time, combiner room number, equipment identifier, and fault type. Based on this recording mechanism, maintenance personnel can directly locate the specific energy storage converter corresponding to the fault type without having to check each on-site device one by one, thereby significantly shortening the fault diagnosis time and providing direct data support for subsequent wiring rectification or equipment maintenance.

[0099] In one possible implementation, assuming the N combiner chambers in the energy storage system are correctly configured, this application also provides a method for independent fault detection and shutdown protection of the combiner chambers during the operation of the energy storage system. Please refer to [link to relevant documentation]. Figure 4This includes the following steps 401-402:

[0100] 401: During the operation of the energy storage system, acquire multi-dimensional monitoring data for each junction room.

[0101] When an energy storage system is in normal operation, continuous monitoring of the system's health status is a prerequisite for ensuring safe operation.

[0102] Multidimensional monitoring data, serving as the fundamental input for determining whether a fault has occurred in the combiner room, is not a simple set of single indicators, but rather a structured data sequence characterizing the internal electrical and environmental conditions of the combiner room. This multidimensional monitoring data can be obtained through various sensors deployed within the combiner room and relay protection equipment between the transformer and the grid side, as well as through communication data between the controller and various energy storage converters.

[0103] 402: For each junction room, if the multi-dimensional monitoring data indicates that a fault has occurred in the junction room, the junction room will be shut down for protection.

[0104] Based on the acquired multidimensional monitoring data, the status of each manifold is independently assessed. For any manifold, when any key parameter or combination of parameters in the multidimensional monitoring data meets the preset fault determination criteria, the multidimensional monitoring data is considered to indicate a fault in the manifold. This determination process can be, for example, by comparing real-time monitoring data with a preset safety threshold range, triggering a fault determination when the monitored value exceeds the threshold range; or by inputting the multidimensional data into a pre-trained fault diagnosis model, which then outputs a fault prediction result.

[0105] Shutdown protection is a safety control action performed on a confirmed faulty combiner cell. The controller sends a shutdown command to all energy storage converters corresponding to the faulty combiner cell, disconnects the AC side circuit breaker, and marks the combiner cell as shut down and isolated. This precise shutdown operation targeting a single combiner cell can limit the fault to a minimum, preventing the entire energy storage system from collapsing due to the failure of a single component, thereby ensuring the integrity of the rest of the system.

[0106] While implementing fault isolation, for combiner rooms whose multi-dimensional monitoring data are within the normal range, a status quo control strategy is adopted. The energy storage converters in these combiner rooms remain connected to the grid and continue charging and discharging tasks, unaffected by shutdown events in other combiner rooms. This mechanism of continued operation in non-faulty areas breaks away from the traditional, indiscriminate management model of "all units shut down at once" and constructs a decoupled control architecture for each combiner room. When the system detects that a combiner room has been shut down, the controller does not send trip commands to other healthy combiner rooms, but maintains their normal operating mode. Through this differentiated processing logic, it is ensured that even if some units of the energy storage system fail, the remaining capacity can still be connected to the grid and play a role, maximizing the availability of the energy storage system.

[0107] In one possible implementation, multi-dimensional monitoring data is acquired from the relay protection equipment corresponding to each combiner room. The relay protection equipment, also known as the power relay protection device, is a key device in the power system for real-time monitoring of electrical quantities, fault identification, and triggering of protective actions. While undertaking protection and control functions, it also acquires system operating status data. This embodiment reuses the data acquisition function of the relay protection equipment to obtain multi-dimensional monitoring data. This multi-dimensional monitoring data includes: the current difference and voltage change characteristics across the transformer, transformer grounding insulation data, and transformer temperature data.

[0108] In one possible implementation, if multidimensional monitoring data indicates that the combiner room has at least one of the following faults: transformer short-circuit fault, transformer grounding insulation fault, transformer high temperature fault, or faults of all energy storage converters corresponding to the combiner room, the combiner room is shut down for protection.

[0109] Transformer short-circuit faults typically manifest as direct conduction caused by insulation breakdown between winding turns or layers, constituting a serious electrical system anomaly. Specifically, relay protection equipment can monitor the current difference and voltage fluctuations across the transformer in real time. When the detected current difference exceeds a preset short-circuit threshold, or the voltage momentarily drops to zero, a transformer short-circuit fault is identified. In response to this assessment, a shutdown command is immediately triggered to disconnect the combiner compartment from the power grid, thereby preventing the fault from escalating and potentially causing a fire or equipment explosion.

[0110] Transformer grounding insulation faults are identified based on grounding current and insulation resistance data. These faults can be detected by relay protection equipment or by insulation detection circuits. A transformer grounding insulation fault is characterized by a decrease in the insulation resistance of the transformer windings or core to ground and an increase in leakage current. Real-time acquisition of grounding current and insulation resistance values ​​at the transformer neutral point or casing is performed. If the grounding current exceeds the preset safe leakage current limit, or the insulation resistance value is lower than the insulation threshold value set according to the voltage level, a transformer grounding insulation fault is identified. Timely shutdown operations can prevent phase-to-phase short circuits caused by continued insulation deterioration.

[0111] High-temperature faults in transformers are monitored using temperature sensor data. Real-time temperature data is acquired by temperature sensors positioned within a preset range around the transformer. This data can be transmitted to relay protection equipment, which then sends it to the controller. Alternatively, the temperature data can be directly transmitted to the controller. A high-temperature fault is identified when the monitored temperature exceeds the maximum permissible temperature set according to the insulation class (e.g., 95℃ or 105℃), or when the rate of temperature rise exceeds a preset limit. Shutdown protection is implemented for such faults to prevent accelerated aging and thermal breakdown of the insulation material due to prolonged overheating.

[0112] A status polling mechanism is used to determine whether any of the energy storage converters corresponding to the combiner room have failed. A full fault condition is considered met when all energy storage converters in the combiner room are in an unavailable state, such as communication interruption or hardware damage. The number of faults is counted by polling the operating status of each energy storage converter or by using heartbeat signals between the converters. If all energy storage converters report fault codes or become unresponsive, a shutdown protection mechanism is implemented to avoid ineffective control of the faulty energy storage converters.

[0113] Based on the specific fault criteria mentioned above, refined monitoring of the combiner room's operating status is achieved. Once the multi-dimensional monitoring data characterizes any of the aforementioned fault conditions, a shutdown protection operation is immediately executed to isolate the fault source and prevent the fault from spreading to other normal parts of the system. This triggering mechanism based on clearly defined fault types, compared to general fault judgments, can more accurately identify dangerous operating conditions and significantly improve the reliability and safety of the energy storage system.

[0114] Furthermore, when multi-dimensional monitoring data indicates a fault in the combiner room, fault event information can be generated. The fault event information includes at least: the identifier of the combiner room, the fault type, and the fault time; the fault event information is stored and sent to the preset maintenance personnel terminal.

[0115] The identifier for each combiner room serves as a unique identification code within the energy storage system, distinguishing different combiner rooms and enabling precise fault location in scenarios with multiple combiner rooms operating in parallel. The fault type is determined based on the monitoring data that triggered the fault, providing a classification description of the anomaly's nature, such as transformer short circuit, transformer grounding insulation fault, or communication loss with the energy storage converter. The fault time is the moment the energy storage system confirms the fault event, and can employ a unified time format with time zone information (such as a UNIX timestamp or YYYY-MM-DD HH:MM:SS format) to provide a precise time reference for subsequent fault tracing.

[0116] After generating the fault event information, a storage operation is performed. The fault event information is stored in the fault log file on the local non-volatile storage medium according to a predefined data structure.

[0117] Fault event information is synchronously sent to the preset maintenance personnel's terminal. The preset maintenance personnel's terminal is a communication target address pre-registered in the system configuration for receiving alarm information. It can be the maintenance personnel's mobile device number, email address, or Internet Protocol (IP) address of the monitoring client. After receiving the fault event information, the maintenance personnel can quickly formulate maintenance strategies based on the junction room identifier and fault type, and check the system's historical data according to the fault time, thereby achieving an efficient closed loop from fault detection to remote response.

[0118] In one possible implementation, see Figure 5 The figure is a schematic diagram of a controller provided in an embodiment of this application.

[0119] The controller may include a memory 501 and a processor 502. For example... Figure 5 As shown, the memory can be random access memory (RAM), flash memory, read-only memory (ROM), EPROM, non-volatile read-only memory (Electronic Programmable ROM), registers, hard disks, removable disks, etc.

[0120] The memory 501 can store computer instructions. When the computer instructions stored in the memory 501 are executed by the processor 502, the processor 502 can be used to execute the energy storage system configuration detection method. The memory 501 can also store data, such as the preset combiner room order, preset energy storage converter order, preset values, and other information involved in the above embodiments.

[0121] This application also provides an energy storage system, which includes a controller and N combiner chambers, where N ≥ 2. Each combiner chamber is equipped with a transformer; the low-voltage side of the transformer is connected to multiple energy storage converters, and the high-voltage side of the transformer is connected to the power grid; the DC side of the energy storage converters is connected to energy storage batteries; the controller is communicatively connected to each energy storage converter; the controller is used to execute any of the energy storage system configuration detection methods provided in this application.

[0122] In this embodiment, the energy storage system achieves centralized management and configuration verification of large-scale energy storage units by constructing a physical architecture containing multiple combiner chambers, forming an energy flow path from the power grid to the high-voltage side, transformer, low-voltage side, energy storage converter, DC side, and energy storage battery. The controller, as the core control unit of the energy storage system, establishes communication connections with multiple energy storage converters corresponding to each combiner chamber via a communication bus, thereby enabling it to issue start-up commands, full-power commands, and acquire grid-side current data from the transformer.

[0123] Specifically, when the system performs configuration checks, the controller executes the check process on N combiner cells sequentially according to a preset combiner cell order. During the check of a single combiner cell, the controller sends start commands to each energy storage converter one by one, based on a preset energy storage converter order. If a energy storage converter starts normally, the controller further sends a full-power command to it and monitors the current value on the grid side of the transformer in that combiner cell in real time. If all energy storage converters fail to start, or if, after sending a full-power command to a normally started energy storage converter, the current on the grid side of the transformer is detected to be less than a preset value, the controller determines that there is a configuration error in that combiner cell. Conversely, if at least one energy storage converter starts normally and the current on the grid side of the transformer is greater than or equal to a preset value under full-power operation, the configuration is determined to be correct.

[0124] Furthermore, the energy storage system also features fault protection during operation. During system operation, the controller acquires multi-dimensional monitoring data from each combiner compartment (e.g., data collected via relay protection equipment). If the monitoring data indicates an anomaly such as a transformer short circuit, grounding insulation fault, high-temperature fault, or failure of all energy storage converters in a combiner compartment, the controller immediately performs a shutdown protection operation on the faulty combiner compartment, while other combiner compartments that have not experienced a fault continue to operate normally, thus ensuring the availability and safety of the entire energy storage system. Simultaneously, the controller can also generate fault event information containing combiner compartment identification, fault type, and fault time, and store or send it to the maintenance personnel's terminal for efficient operation and maintenance management.

[0125] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape) or a semiconductor medium (e.g., solid-state disk (SSD)).

[0126] This application also provides a readable storage medium for storing the methods provided in the above embodiments. Examples include random access memory (RAM), flash memory, read-only memory (ROM), EPROM, non-volatile read-only memory (EPROM), registers, hard disks, removable disks, or any other form of storage medium in the art.

[0127] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Regarding the methods disclosed in the embodiments, since they correspond to the product embodiments disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the description of the product embodiments.

[0128] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting the configuration of an energy storage system, characterized in that, include: According to the preset manifold order, configuration tests are performed on N manifolds in sequence, where N≥2; During the configuration test of the target combiner room, the multiple energy storage converters corresponding to the target combiner room are started one by one according to the preset energy storage converter sequence. If all energy storage converters fail to start, or if the grid-side current of the transformer in the target combiner room is still less than a preset value after sending a full-power command to all normally started energy storage converters, the target combiner room is determined to be misconfigured.

2. The energy storage system configuration detection method according to claim 1, characterized in that, The process involves sequentially starting multiple energy storage converters corresponding to the target combiner room according to a preset order. If all energy storage converters fail to start, or if the grid-side current of the transformer in the target combiner room is still less than a preset value after sending a full-power command to all normally started energy storage converters, the target combiner room is determined to be misconfigured. This includes: According to the preset energy storage converter order, send a start command to the energy storage converter that is currently to be started; If the energy storage converter fails to start, and the iteration through all energy storage converters has ended, it is determined that the target combiner room is configured incorrectly; if the iteration through all energy storage converters has not ended, the process returns to the step of sending a start command to the energy storage converter to be started according to the preset energy storage converter sorting. When the energy storage converter is started normally, a full power command is sent to the energy storage converter, and the grid-side current of the transformer in the target combiner room is obtained; If the grid-side current of the transformer in the target combiner room is less than a preset value, and the iteration of all energy storage converters has ended, it is determined that the target combiner room is configured incorrectly; if the iteration of all energy storage converters has not ended, the process returns to the step of sending a start command to the energy storage converter to be started according to the preset energy storage converter sorting.

3. The energy storage system configuration detection method according to claim 2, characterized in that, In the event that the energy storage converter fails to start, the following additional steps are also included: Record the energy storage converter that failed to start; When the grid-side current of the transformer in the target junction room is less than a preset value, the method further includes: Record the energy storage converter corresponding to the grid-side current of the transformer in the target combiner room being less than a preset value; After determining that the target combiner room is misconfigured, the process further includes: Summarize all records of the energy storage converter, generate and store the configuration detection record of the target combiner room; If the target combiner room is confirmed to be configured correctly, delete all records of the energy storage converter.

4. The energy storage system configuration detection method according to claim 1, characterized in that, After starting up the multiple energy storage converters corresponding to the target combiner room one by one, the process also includes: If at least one of the energy storage converters starts normally, and a full-power command is issued to the normally started energy storage converter, and the grid-side current of the transformer in the target combiner room is greater than or equal to a preset value, then the target combiner room is determined to be configured correctly.

5. The energy storage system configuration detection method according to any one of claims 1 to 4, characterized in that, Also includes: During the operation of the energy storage system, multi-dimensional monitoring data of each of the aforementioned junction chambers are acquired; For each of the manifolds, if the multidimensional monitoring data indicates that the manifold has failed, the manifold will be shut down for protection; if the manifold has not failed, it will continue to operate.

6. The energy storage system configuration detection method according to claim 5, characterized in that, The multidimensional monitoring data is used to characterize the presence of transformer short-circuit faults, transformer grounding insulation faults, and transformer high-temperature faults in the junction room.

7. The energy storage system configuration detection method according to claim 5, characterized in that, The acquisition of multidimensional monitoring data for each of the junction rooms includes: The multidimensional monitoring data collected by the relay protection equipment corresponding to the junction room are acquired respectively. The multidimensional monitoring data includes: the current difference and voltage change characteristics on both sides of the transformer, the transformer grounding insulation data, and the transformer temperature data.

8. The energy storage system configuration detection method according to claim 5, characterized in that, In cases where the multidimensional monitoring data characterizes a fault in the junction room, the following is also included: Generate fault event information, which includes at least: the identifier of the junction room, the fault type, and the fault time; The fault event information is stored and sent to the preset maintenance personnel terminal.

9. A controller, characterized in that, Including processor and memory; The memory is used to store programs, instructions, or code; The processor is used to execute programs, instructions, or code in the memory to complete the energy storage system configuration detection method as described in any one of claims 1 to 8.

10. An energy storage system, characterized in that, include: A controller and N junction rooms, where N ≥ 2; Each junction room is equipped with one transformer; The low-voltage side of the transformer is connected to multiple energy storage converters, and the high-voltage side of the transformer is connected to the power grid. The energy storage converter is connected to an energy storage battery on its DC side. The controller is communicatively connected to each of the energy storage converters; The controller is used to perform the energy storage system configuration detection method as described in any one of claims 1 to 8.

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