Grid-connected test method and system of network-forming type energy storage system

Abstract

The invention relates to the technical field of network construction type energy storage, in particular to a grid-connected test method and system for a network construction type energy storage system, and the method comprises the steps: obtaining the state information and environment information of the network construction type energy storage system; the networking type energy storage system judges whether to carry out early warning or not according to the state information and the environment information; according to the method, multi-dimensional intelligent analysis and dynamic early warning are performed by fusing the state information and the environment information and combining historical early warning data, so that the accuracy, the fault processing efficiency and the operation reliability of the grid-connected test of the grid-forming type energy storage system are effectively improved, and powerful support is provided for reliable application of the grid-forming type energy storage system in a complex power grid environment.

Description

Technical Field

[0001] This invention relates to the field of grid-connected energy storage technology, and more specifically, to a grid-connected testing method and system for a grid-connected energy storage system. Background Technology

[0002] Grid-connected testing of grid-connected energy storage systems primarily relies on single-point monitoring of state parameters such as voltage, current, and temperature, along with simple threshold judgments, to achieve fault early warning. However, this approach has significant limitations: Firstly, the impact of environmental information (such as ambient temperature and humidity) on the system state is not fully considered during testing, leading to fixed early warning thresholds that are difficult to adapt to actual operating needs under different environments. For example, if battery heat dissipation efficiency decreases in high-temperature environments, using the same temperature early warning threshold as in normal temperatures can easily cause delayed warnings or false alarms. Secondly, the lack of in-depth mining and matching analysis of historical early warning data means that when anomalies such as voltage fluctuations or excessive current peaks occur, it is impossible to quickly determine the nature of the fault by comparing it with similar historical operating conditions, resulting in lengthy fault location and difficulty in developing targeted handling strategies. Furthermore, existing testing methods do not adequately consider multi-parameter collaborative early warning. State parameters such as voltage fluctuations, current distortions, and abnormal temperatures are coupled, and single-parameter early warnings may miss potential risks. At the same time, environmental factors such as excessive humidity may accelerate the aging of electrical equipment insulation; if not analyzed in conjunction with equipment state parameters, this can easily lead to serious problems such as insulation failures. These shortcomings make it difficult for grid-connected energy storage systems to achieve accurate early warning and efficient fault diagnosis during grid-connected testing, thus restricting their reliable application in complex power grid environments. Summary of the Invention

[0003] In view of this, the present invention addresses the shortcomings of the prior art by proposing a grid-connected testing method and system for a grid-connected energy storage system, aiming to solve at least one of the problems mentioned in the background art.

[0004] In a first aspect, the present invention provides a grid-connected testing method for a grid-type energy storage system, comprising the following steps:

[0005] Acquire the status information and environmental information of the grid-type energy storage system. The status information includes voltage, current, and temperature values. The environmental information includes ambient temperature and humidity values.

[0006] Based on the voltage value, determine whether to issue a warning signal. Based on the issued warning signal, determine whether there is a similar warning signal in the historical warning database or whether there is the same ambient temperature value and ambient humidity value as the current grid-type energy storage system. If so, issue a corresponding prompt signal.

[0007] Based on the current value, determine whether to issue a warning signal. If a warning signal is issued, determine whether there is a warning record in the historical warning database that matches the current value. If there is, determine whether the voltage fluctuation range of the corresponding current value in the historical warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system.

[0008] Whether to issue an early warning is determined based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system.

[0009] In some embodiments, when determining whether to issue a warning signal based on the voltage value, and determining whether the same warning signal exists in the historical warning database or whether the same ambient temperature and humidity values ​​exist as in the current grid-type energy storage system, and if so, issuing a corresponding prompt signal, the process includes:

[0010] When the voltage fluctuation based on the voltage value is greater than a preset fluctuation threshold, and the duration of the voltage fluctuation being greater than the preset fluctuation threshold is less than or equal to a preset fluctuation time threshold, a first warning signal is issued.

[0011] When the voltage fluctuation based on the voltage value is greater than the fluctuation threshold, and the duration of the voltage fluctuation exceeding the fluctuation threshold is greater than a preset fluctuation time threshold, a second warning signal is issued;

[0012] When the first warning signal or the second warning signal is issued, it is determined whether the same warning signal exists in the historical warning database.

[0013] In some embodiments, when the first warning signal or the second warning signal is issued, determining whether the same warning signal exists in the historical warning database includes:

[0014] When the same warning signal exists in the historical warning database, a first alert signal is issued;

[0015] When the same warning signal does not exist in the historical warning database, a second prompt signal is issued.

[0016] In some embodiments, when the same warning signal exists in the historical warning database, a first alert signal is issued, including:

[0017] When the same warning signal exists in the historical warning database, determine whether the ambient temperature value and the ambient humidity value corresponding to the same warning signal in the historical warning database are the same as the ambient temperature value and the ambient humidity value of the current grid-type energy storage system.

[0018] When the ambient temperature value corresponding to the same warning signal in the historical warning database is the same as the ambient temperature value of the current grid-type energy storage system, and the ambient humidity value corresponding to the same warning signal in the historical warning database is the same as the ambient humidity value of the current grid-type energy storage system, the first prompt signal is changed to the third prompt signal.

[0019] When the ambient temperature value corresponding to the same warning signal in the historical warning database is the same as the ambient temperature value of the current grid-type energy storage system, and the ambient humidity value corresponding to the same warning signal in the historical warning database is different from the ambient humidity value of the current grid-type energy storage system, the first prompt signal is changed to the fourth prompt signal.

[0020] When the ambient temperature value corresponding to the same early warning signal in the historical early warning database is different from the ambient temperature value of the current grid-type energy storage system, and the ambient humidity value corresponding to the same early warning signal in the historical early warning database is the same as the ambient humidity value of the current grid-type energy storage system, the first prompt signal is changed to the fourth prompt signal.

[0021] When the ambient temperature value corresponding to the same early warning signal in the historical early warning database is different from the current ambient temperature value of the grid-type energy storage system, and the ambient humidity value corresponding to the same early warning signal in the historical early warning database is different from the current ambient humidity value of the grid-type energy storage system, the first prompt signal continues to be issued.

[0022] In some embodiments, when determining whether to issue a warning signal based on the current value, and if a warning signal is issued, determining whether there is a warning record in the historical warning database that matches the current value, and if so, determining whether the voltage fluctuation range corresponding to the current value in the historical warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system, the process includes:

[0023] When the peak current value in the current value is greater than the rated current, a third warning signal is issued;

[0024] Otherwise, no third warning signal will be issued;

[0025] When the peak current value is greater than the rated current, a third warning signal is issued. Then, it is determined whether there is a warning record in the historical warning database that matches the current value.

[0026] In some embodiments, when the peak current value in the current value is greater than the rated current and a third warning signal is issued, determining whether there is a warning record in the historical warning database that matches the current value includes:

[0027] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is less than or equal to a preset threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current grid-type energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first-level matching historical early warning, and a fifth prompt signal is issued.

[0028] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is less than or equal to the threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value of the current grid-type energy storage system is greater than the rise rate deviation threshold, it is marked as a second-level matching historical early warning, and a sixth prompt signal is issued.

[0029] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is greater than the threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current grid-type energy storage system is less than or equal to the rise rate deviation threshold, it is marked as a second-level matching historical early warning, and a sixth prompt signal is issued.

[0030] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is greater than the threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value of the current grid-type energy storage system is greater than the rise rate deviation threshold, no warning signal is issued.

[0031] In some embodiments, when the peak current value in the current value is greater than the rated current and a third warning signal is issued, when determining whether there is a warning record in the historical warning database that matches the current value, the method further includes:

[0032] When the deviation between the current value in the historical early warning database and the current value of the current-structured energy storage system is less than or equal to a preset threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current-structured energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first-level matching historical early warning, and a fifth prompt signal is issued. Then, it is determined whether the voltage fluctuation range of the corresponding current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the current-structured energy storage system, including:

[0033] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is less than or equal to a preset threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current grid-type energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first-level matching historical early warning and a fifth prompt signal is issued. When the voltage fluctuation range of the corresponding current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system, the fifth prompt signal is changed to a seventh prompt signal.

[0034] Otherwise, continue to issue the fifth prompt signal.

[0035] In some embodiments, when determining whether to issue an early warning based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system, the following is included:

[0036] When the temperature value of the grid-type energy storage system is greater than a preset temperature threshold, and the ambient temperature value is greater than a preset ambient temperature threshold, a fourth warning signal is issued.

[0037] When the temperature value of the grid-type energy storage system is greater than the temperature threshold, and the ambient temperature value is less than or equal to the ambient temperature threshold, a fifth warning signal is issued.

[0038] When the temperature value of the grid-type energy storage system is less than or equal to the temperature threshold, and the ambient temperature value is greater than the ambient temperature threshold, a sixth warning signal is issued.

[0039] In some embodiments, when determining whether to issue an early warning based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system, the method further includes:

[0040] When the ambient humidity value is greater than the preset ambient humidity threshold, a seventh warning signal is issued.

[0041] Secondly, the present invention provides a grid-connected testing system for a grid-type energy storage system, comprising:

[0042] The acquisition module is configured to acquire the status information and environmental information of the grid-type energy storage system. The status information includes voltage, current, and temperature values; the environmental information includes ambient temperature and humidity values.

[0043] The primary processing module is configured to determine whether to issue a warning signal based on the voltage value, and to determine whether the same warning signal exists in the historical warning database or whether the ambient temperature value and ambient humidity value are the same as those of the current grid-type energy storage system based on the issued warning signal. If they exist, a corresponding prompt signal is issued.

[0044] The secondary processing module is configured to determine whether to issue a warning signal based on the current value. If a warning signal is issued, it determines whether there is a warning record in the historical warning database that matches the current value. If there is, it determines whether the voltage fluctuation range of the corresponding current value in the historical warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system.

[0045] The three-stage processing module is configured to determine whether to issue an early warning based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system.

[0046] Compared with existing technologies, the beneficial effects of this invention are as follows: By integrating the voltage, current, temperature, and other status information of the grid-type energy storage system with environmental information such as ambient temperature and humidity, and combining this with a historical early warning database for intelligent analysis, this invention effectively solves the problems of fixed early warning thresholds, lack of consideration for environmental impact, and lack of multi-parameter collaborative analysis in existing technologies. This not only improves the accuracy and adaptability of early warnings, enabling dynamic adjustment of judgment logic based on different environmental conditions to avoid early warning delays or false alarms caused by environmental changes, but also achieves rapid fault location and targeted processing. By comparing similar historical early warning records, it reduces fault location time and improves processing efficiency. Furthermore, it enhances multi-parameter collaborative early warning capabilities, comprehensively analyzes the correlation between various parameters, more comprehensively identifies potential risks, and ensures test safety and reliability. Ultimately, this provides strong support for the reliable application of grid-type energy storage systems in complex power grid environments and promotes the efficient application of new energy power generation.

[0047] The above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0048] Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 A flowchart of a grid-connected testing method for a grid-type energy storage system provided in an embodiment of the present invention;

[0051] Figure 2 A functional block diagram of a grid-connected testing system for a grid-type energy storage system provided in an embodiment of the present invention. Detailed Implementation

[0052] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] See Figure 1-2 As shown, the first embodiment:

[0054] A grid-connected testing method for a grid-type energy storage system according to an embodiment of this application includes the following steps:

[0055] Acquire the status information and environmental information of the grid-type energy storage system. The status information includes voltage, current, and temperature values. The environmental information includes ambient temperature and humidity values.

[0056] Based on the voltage value, determine whether to issue a warning signal. Based on the issued warning signal, determine whether there is a similar warning signal in the historical warning database or whether there is the same ambient temperature value and ambient humidity value as the current grid-type energy storage system. If so, issue a corresponding prompt signal.

[0057] Based on the current value, determine whether to issue a warning signal. If a warning signal is issued, determine whether there is a warning record in the historical warning database that matches the current value. If there is, determine whether the voltage fluctuation range of the corresponding current value in the historical warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system.

[0058] Whether to issue an early warning is determined based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system.

[0059] In some specific embodiments, when determining whether to issue a warning signal based on the voltage value, and determining whether the same warning signal exists in the historical warning database or whether the same ambient temperature and humidity values ​​exist as in the current grid-type energy storage system, and if so, issuing a corresponding prompt signal, the process includes:

[0060] When the voltage fluctuation based on the voltage value is greater than a preset fluctuation threshold, and the duration of the voltage fluctuation being greater than the preset fluctuation threshold is less than or equal to a preset fluctuation time threshold, a first warning signal is issued.

[0061] When the voltage fluctuation based on the voltage value is greater than the fluctuation threshold, and the duration of the voltage fluctuation exceeding the fluctuation threshold is greater than a preset fluctuation time threshold, a second warning signal is issued;

[0062] When the first warning signal or the second warning signal is issued, it is determined whether the same warning signal exists in the historical warning database.

[0063] In some specific embodiments, when the first warning signal or the second warning signal is issued, determining whether the same warning signal exists in the historical warning database includes:

[0064] When the same warning signal exists in the historical warning database, a first alert signal is issued;

[0065] When the same warning signal does not exist in the historical warning database, a second prompt signal is issued.

[0066] It should be understood that preset voltage fluctuation thresholds (such as ±5% of the rated voltage) and fluctuation time thresholds (such as 10 seconds) are used. When the voltage fluctuation exceeds the amplitude threshold, if the duration is less than or equal to the time threshold, it is determined to be a short-term disturbance and a first warning signal is issued; if the duration is greater than the time threshold, it is determined to be a persistent abnormality and a second warning signal is issued.

[0067] After issuing the first or second warning signal, the system automatically searches the historical warning database to check for any warning records that match the voltage fluctuation amplitude, duration, and corresponding operating conditions. If a record exists, the system issues the first warning signal (indicating a reference to historical handling experience); if no record exists, the system issues the second warning signal (indicating a new type of anomaly).

[0068] In some specific embodiments, when the same warning signal exists in the historical warning database, a first alert signal is issued, including:

[0069] When the same warning signal exists in the historical warning database, determine whether the ambient temperature value and the ambient humidity value corresponding to the same warning signal in the historical warning database are the same as the ambient temperature value and the ambient humidity value of the current grid-type energy storage system.

[0070] When the ambient temperature value corresponding to the same warning signal in the historical warning database is the same as the ambient temperature value of the current grid-type energy storage system, and the ambient humidity value corresponding to the same warning signal in the historical warning database is the same as the ambient humidity value of the current grid-type energy storage system, the first prompt signal is changed to the third prompt signal.

[0071] When the ambient temperature value corresponding to the same warning signal in the historical warning database is the same as the ambient temperature value of the current grid-type energy storage system, and the ambient humidity value corresponding to the same warning signal in the historical warning database is different from the ambient humidity value of the current grid-type energy storage system, the first prompt signal is changed to the fourth prompt signal.

[0072] When the ambient temperature value corresponding to the same early warning signal in the historical early warning database is different from the ambient temperature value of the current grid-type energy storage system, and the ambient humidity value corresponding to the same early warning signal in the historical early warning database is the same as the ambient humidity value of the current grid-type energy storage system, the first prompt signal is changed to the fourth prompt signal.

[0073] When the ambient temperature value corresponding to the same early warning signal in the historical early warning database is different from the current ambient temperature value of the grid-type energy storage system, and the ambient humidity value corresponding to the same early warning signal in the historical early warning database is different from the current ambient humidity value of the grid-type energy storage system, the first prompt signal continues to be issued.

[0074] In some specific embodiments, when determining whether to issue a warning signal based on the current value, and if a warning signal is issued, determining whether there is a warning record in the historical warning database that matches the current value, and if so, determining whether the voltage fluctuation range corresponding to the current value in the historical warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system, the process includes:

[0075] When the peak current value in the current value is greater than the rated current, a third warning signal is issued;

[0076] Otherwise, no third warning signal will be issued;

[0077] When the peak current value is greater than the rated current, a third warning signal is issued. Then, it is determined whether there is a warning record in the historical warning database that matches the current value.

[0078] In some specific embodiments, when the peak current value in the current value is greater than the rated current and a third warning signal is issued, determining whether there is a warning record in the historical warning database that matches the current value includes:

[0079] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is less than or equal to a preset threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current grid-type energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first-level matching historical early warning, and a fifth prompt signal is issued.

[0080] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is less than or equal to the threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value of the current grid-type energy storage system is greater than the rise rate deviation threshold, it is marked as a second-level matching historical early warning, and a sixth prompt signal is issued.

[0081] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is greater than the threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current grid-type energy storage system is less than or equal to the rise rate deviation threshold, it is marked as a second-level matching historical early warning, and a sixth prompt signal is issued.

[0082] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is greater than the threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value of the current grid-type energy storage system is greater than the rise rate deviation threshold, no warning signal is issued.

[0083] In some specific embodiments, when the peak current value in the current value is greater than the rated current and a third warning signal is issued, the method for determining whether there is a warning record in the historical warning database that matches the current value further includes:

[0084] When the deviation between the current value in the historical early warning database and the current value of the current-structured energy storage system is less than or equal to a preset threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current-structured energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first-level matching historical early warning, and a fifth prompt signal is issued. Then, it is determined whether the voltage fluctuation range of the corresponding current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the current-structured energy storage system, including:

[0085] When the deviation between the current value in the historical early warning database and the current value of the current grid-type energy storage system is less than or equal to a preset threshold deviation, and the deviation between the current rise rate of the corresponding current value in the historical early warning database and the current rise rate of the current value in the current grid-type energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first-level matching historical early warning and a fifth prompt signal is issued. When the voltage fluctuation range of the corresponding current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system, the fifth prompt signal is changed to a seventh prompt signal.

[0086] Otherwise, continue to issue the fifth prompt signal.

[0087] It should be understood that when the same warning signal exists in the historical warning database, the system further compares the corresponding ambient temperature and humidity values ​​from the historical warning with the current environmental information, and further subdivides the warning signal according to the degree of matching:

[0088] If the historical and current ambient temperature and humidity are the same (e.g., the ambient temperature was 30℃ and humidity was 60% when the historical warning was issued, and the current temperature and humidity are also 30℃ and 60%), then the first warning signal will be changed to the third warning signal (representing "a perfectly matching environmental condition, and the historical processing solution can be directly reused").

[0089] If only one of the historical and current environmental factors is the same (e.g., the temperature is the same but the humidity is different, or the humidity is the same but the temperature is different), then the signal will be changed to the fourth warning signal (meaning "some environmental factors match, and the historical plan needs to be referred to and the environmental adaptation measures need to be adjusted").

[0090] If the historical and current ambient temperature and humidity are different, the first warning signal will be maintained (meaning "the environmental conditions are significantly different, and the historical solution is for reference only and should be adapted with caution").

[0091] When the peak current exceeds the rated current (issuing the third warning signal), the system matches it against historical warning records using three dimensions: "current value deviation + current rise rate deviation + voltage fluctuation range".

[0092] If the deviation between the historical current value and the current value is ≤ a preset threshold (e.g., 5%), and the deviation of the current rise rate is ≤ a preset threshold (e.g., 10%), it is marked as a first-level matching historical warning and a fifth prompt signal is issued.

[0093] If only one of the current value or the rate of rise meets the deviation threshold, it is marked as a second-level matching historical warning and a sixth prompt signal is issued.

[0094] If both deviations exceed the threshold, no warning signal will be issued (meaning "no valid matching history").

[0095] For the first-level matching historical warning (fifth warning signal), further compare the voltage fluctuation range corresponding to the current value in the historical warning with the voltage fluctuation range corresponding to the current: if the ranges are the same (e.g., the voltage fluctuation was ±3% when the historical current exceeded the limit, and it is also ±3% now), then change the fifth warning signal to the seventh warning signal (meaning "current, rise rate, and voltage fluctuation are perfectly matched, and the historical scheme can be directly reused"); otherwise, keep the fifth warning signal (meaning "current and rise rate are matched, but there is a difference in voltage fluctuation, and the scheme needs to be adjusted").

[0096] In some specific embodiments, when determining whether to issue an early warning based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system, the following steps are included:

[0097] When the temperature value of the grid-type energy storage system is greater than a preset temperature threshold, and the ambient temperature value is greater than a preset ambient temperature threshold, a fourth warning signal is issued.

[0098] When the temperature value of the grid-type energy storage system is greater than the temperature threshold, and the ambient temperature value is less than or equal to the ambient temperature threshold, a fifth warning signal is issued.

[0099] When the temperature value of the grid-type energy storage system is less than or equal to the temperature threshold, and the ambient temperature value is greater than the ambient temperature threshold, a sixth warning signal is issued.

[0100] In some specific embodiments, when determining whether to issue an early warning based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system, the method further includes:

[0101] When the ambient humidity value is greater than the preset ambient humidity threshold, a seventh warning signal is issued.

[0102] It should be understood that the system simultaneously monitors the equipment temperature values ​​(such as cell temperature and IGBT temperature) and ambient temperature values ​​of the grid-type energy storage system, and issues differentiated warnings based on the relationship between these two values ​​and corresponding preset thresholds.

[0103] When the equipment temperature is greater than the preset temperature threshold (e.g., battery cell temperature > 40℃) and the ambient temperature is greater than the preset ambient temperature threshold (e.g., ambient temperature > 35℃), a fourth warning signal is issued, indicating that the high temperature of the equipment may be caused by a combination of "heat generation from the equipment itself + poor heat dissipation from the environment" (e.g., the heat generation from battery overload combined with the high temperature environment, resulting in a significant decrease in heat dissipation efficiency).

[0104] When the equipment temperature is greater than the preset temperature threshold but the ambient temperature is less than or equal to the preset ambient temperature threshold, the fifth warning signal is issued, indicating that the high temperature of the equipment is mainly due to its own abnormality (such as internal short circuit of the battery or heat generation due to IGBT failure), and is unrelated to the ambient heat dissipation conditions (the ambient temperature is normal but the equipment is still overheated).

[0105] When the equipment temperature is less than or equal to the preset temperature threshold but the ambient temperature is greater than the preset ambient temperature threshold, a sixth warning signal is issued, indicating that although the current equipment temperature is normal, the ambient temperature has exceeded the standard and early intervention is required (such as starting cooling measures) to prevent the continuous impact of high ambient temperature from causing the equipment temperature to exceed the standard in the future (such as the equipment operating in a high-temperature environment for a long time, and heat gradually accumulating).

[0106] When the detected ambient humidity value exceeds the preset ambient humidity threshold (e.g., humidity > 85%), a seventh warning signal will be issued directly, indicating that high humidity may lead to a decrease in the insulation performance of electrical equipment (e.g., condensation in switch cabinets, moisture in battery terminals). Dehumidification or insulation testing measures should be initiated in a timely manner to avoid secondary faults such as short circuits and creepage caused by humidity issues.

[0107] A second embodiment of a grid-connected testing system for a grid-type energy storage system according to an embodiment of this application includes:

[0108] The acquisition module is configured to acquire the status information and environmental information of the grid-type energy storage system. The status information includes voltage, current, and temperature values; the environmental information includes ambient temperature and humidity values.

[0109] The primary processing module is configured to determine whether to issue a warning signal based on the voltage value, and to determine whether the same warning signal exists in the historical warning database or whether the ambient temperature value and ambient humidity value are the same as those of the current grid-type energy storage system based on the issued warning signal. If they exist, a corresponding prompt signal is issued.

[0110] The secondary processing module is configured to determine whether to issue a warning signal based on the current value. If a warning signal is issued, it determines whether there is a warning record in the historical warning database that matches the current value. If there is, it determines whether the voltage fluctuation range of the corresponding current value in the historical warning database is the same as the voltage fluctuation range corresponding to the current value of the current grid-type energy storage system.

[0111] The three-stage processing module is configured to determine whether to issue an early warning based on the temperature value, ambient temperature value, and ambient humidity value of the grid-type energy storage system.

[0112] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0113] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0114] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0115] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A grid-connected test method for a grid-forming energy storage system, characterized in that, The method comprises the following steps: acquiring state information and environment information of the grid-connected energy storage system, the state information comprising voltage values, current values, and temperature values; the environment information comprising environment temperature values and environment humidity values; determining whether to issue a warning signal based on the voltage values, determining whether there is a same warning signal in a historical warning database or whether there are the same environment temperature values and environment humidity values as the grid-connected energy storage system based on the issued warning signal, and issuing a corresponding prompt signal if there is; determining whether to issue a warning signal based on the current values, determining whether there is a warning record matching the current values in the historical warning database if a warning signal is issued, and determining whether the voltage fluctuation range corresponding to the current values in the historical warning database is the same as the voltage fluctuation range corresponding to the current values of the grid-connected energy storage system; determining whether to issue a warning based on the temperature values of the grid-connected energy storage system, the environment temperature values, and the environment humidity values. 2.The grid-connected test method of a network-constructed energy storage system according to claim 1, wherein, In the step of determining whether to issue a warning signal based on the voltage values, determining whether there is a same warning signal in a historical warning database or whether there are the same environment temperature values and environment humidity values as the grid-connected energy storage system based on the issued warning signal, and issuing a corresponding prompt signal if there is, the method comprises: issuing a first warning signal when the voltage fluctuation based on the voltage values is greater than a preset fluctuation threshold value and the duration for which the voltage fluctuation is greater than the preset fluctuation threshold value is less than or equal to a preset fluctuation time threshold value; issuing a second warning signal when the voltage fluctuation based on the voltage values is greater than the fluctuation threshold value and the duration for which the voltage fluctuation is greater than the fluctuation threshold value is greater than the preset fluctuation time threshold value; determining whether there is a same warning signal in the historical warning database when the first warning signal or the second warning signal is issued. 3.The grid-connected test method of a network-constructed energy storage system according to claim 2, wherein, When the first warning signal or the second warning signal is issued, determining whether there is a same warning signal in the historical warning database comprises: issuing a first prompt signal when there is a same warning signal in the historical warning database; issuing a second prompt signal when there is no same warning signal in the historical warning database.

4. The grid-connected test method of a network-constructed energy storage system according to claim 3, characterized in that, When there is a same warning signal in the historical warning database, issuing a first prompt signal comprises: determining whether the environment temperature values and the environment humidity values corresponding to the same warning signal in the historical warning database are the same as the environment temperature values and the environment humidity values of the grid-connected energy storage system; changing the first prompt signal to a third prompt signal when the environment temperature values corresponding to the same warning signal in the historical warning database are the same as the environment temperature values of the grid-connected energy storage system and the environment humidity values corresponding to the same warning signal in the historical warning database are the same as the environment humidity values of the grid-connected energy storage system. When the environment temperature value corresponding to the same early warning signal in the historical early warning database is the same as the environment temperature value of the grid-forming energy storage system at present, and the environment humidity value corresponding to the same early warning signal in the historical early warning database is different from the environment humidity value of the grid-forming energy storage system at present, the first prompt signal is changed into a fourth prompt signal; When the environment temperature value corresponding to the same early warning signal in the historical early warning database is different from the environment temperature value of the grid-forming energy storage system at present, and the environment humidity value corresponding to the same early warning signal in the historical early warning database is the same as the environment humidity value of the grid-forming energy storage system at present, the first prompt signal is changed into the fourth prompt signal; When the environment temperature value corresponding to the same early warning signal in the historical early warning database is different from the environment temperature value of the grid-forming energy storage system at present, and the environment humidity value corresponding to the same early warning signal in the historical early warning database is different from the environment humidity value of the grid-forming energy storage system at present, the first prompt signal is continuously sent out.

5. The grid-connected test method of a network-constructed energy storage system according to claim 4, characterized in that, In the step of judging whether to send out an early warning signal according to the current value, if an early warning signal is sent out, it is judged whether there is an early warning record matching the current current value in the historical early warning database, if there is, it is judged whether the voltage fluctuation range corresponding to the current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the grid-forming energy storage system at present, comprising: When the current peak value in the current value is greater than the rated current, a third early warning signal is sent out; Otherwise, no third early warning signal is sent out; When the current peak value in the current value is greater than the rated current, a third early warning signal is sent out, it is judged whether there is an early warning record matching the current current value in the historical early warning database.

6. The grid-connected test method of a network-constructed energy storage system according to claim 5, characterized in that, When the current peak value in the current value is greater than the rated current, a third early warning signal is sent out, it is judged whether there is an early warning record matching the current current value in the historical early warning database, comprising: When the current value in the historical early warning database deviates from the current current value of the grid-forming energy storage system by less than or equal to a preset threshold deviation, and the current rise rate deviation value between the current rise rate of the current value corresponding to the historical early warning database and the current rise rate of the current value of the grid-forming energy storage system is less than or equal to a preset rise rate deviation threshold, it is marked as a first matching historical early warning, and a fifth prompt signal is sent out; When the current value in the historical early warning database deviates from the current current value of the grid-forming energy storage system by less than or equal to the threshold deviation, and the current rise rate deviation value between the current rise rate of the current value corresponding to the historical early warning database and the current rise rate of the current value of the grid-forming energy storage system is greater than the rise rate deviation threshold, it is marked as a second matching historical early warning, and a sixth prompt signal is sent out; When the current value in the historical early warning database deviates from the current current value of the grid-forming energy storage system by more than the threshold deviation, and the rising rate deviation between the current rising rate of the corresponding current value in the historical early warning database and the current rising rate of the current value of the grid-forming energy storage system is less than or equal to the rising rate deviation threshold, a secondary matching historical early warning is marked, and a sixth prompt signal is sent out; When the current value in the historical early warning database deviates from the current current value of the grid-forming energy storage system by more than the threshold deviation, and the rising rate deviation between the current rising rate of the corresponding current value in the historical early warning database and the current rising rate of the current value of the grid-forming energy storage system is greater than the rising rate deviation threshold, no prompt signal is sent out.

7. The grid-connected test method of a network-constructed energy storage system according to claim 6, characterized in that, When the current peak value in the current value is greater than the rated current, a third early warning signal is sent out, and whether there is a matching early warning record in the historical early warning database is determined, further comprising: When the current value in the historical early warning database deviates from the current current value of the grid-forming energy storage system by less than or equal to a preset threshold deviation, and the rising rate deviation between the current rising rate of the corresponding current value in the historical early warning database and the current rising rate of the current value of the grid-forming energy storage system is less than or equal to a preset rising rate deviation threshold, a first matching historical early warning is marked, and a fifth prompt signal is sent out, whether the voltage fluctuation range corresponding to the current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the grid-forming energy storage system is determined, comprising: When the current value in the historical early warning database deviates from the current current value of the grid-forming energy storage system by less than or equal to a preset threshold deviation, and the rising rate deviation between the current rising rate of the corresponding current value in the historical early warning database and the current rising rate of the current value of the grid-forming energy storage system is less than or equal to a preset rising rate deviation threshold, a first matching historical early warning is marked, and a fifth prompt signal is sent out, the voltage fluctuation range corresponding to the current value in the historical early warning database is the same as the voltage fluctuation range corresponding to the current value of the grid-forming energy storage system, and the fifth prompt signal is changed to a seventh prompt signal; Otherwise, the fifth prompt signal is continuously sent out. 8.The grid-connected test method of a network-constructed energy storage system according to claim 7, wherein, In the determination of whether to perform early warning according to the temperature value, the ambient temperature value and the ambient humidity value of the grid-forming energy storage system, comprising: When the temperature value of the grid-forming energy storage system is greater than a preset temperature threshold, and the ambient temperature value is greater than a preset ambient temperature threshold, a fourth early warning signal is sent out; When the temperature value of the grid-forming energy storage system is greater than the temperature threshold, and the ambient temperature value is less than or equal to the ambient temperature threshold, a fifth early warning signal is sent out; When the temperature value of the grid-forming energy storage system is less than or equal to the temperature threshold, and the ambient temperature value is greater than the ambient temperature threshold, a sixth early warning signal is sent out. 9.The grid-connected test method of a network-constructed energy storage system according to claim 8, wherein, The method further comprises: when the environment humidity value is greater than a preset environment humidity threshold, a seventh early warning signal is sent out. 10.A grid integration test system for grid-forming energy storage systems, comprising: The grid-connected test method is applied to the grid-connected energy storage system of any one of claims 1 to 9, comprising: a collection module configured to acquire state information and environment information of the grid-connected energy storage system, the state information comprising voltage values, current values, and temperature values, and the environment information comprising environment temperature values and environment humidity values; a first processing module configured to determine whether to send out an early warning signal according to the voltage values, and determine whether there is a same early warning signal or whether there are same environment temperature values and environment humidity values as the grid-connected energy storage system in a historical early warning database based on the sent out early warning signal, and send out a corresponding prompt signal if there is; a second processing module configured to determine whether to send out an early warning signal according to the current values, and determine whether there is a same early warning record as the current current values in the historical early warning database if an early warning signal is sent out, and determine whether a voltage fluctuation range corresponding to the current current values in the historical early warning database is same as a voltage fluctuation range corresponding to the current current values of the grid-connected energy storage system; a third processing module configured to determine whether to send out an early warning according to the temperature values, the environment temperature values, and the environment humidity values of the grid-connected energy storage system.

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