Fault diagnosis method and system for energy storage power station

Abstract

The invention discloses an energy storage power station fault diagnosis method and system, and the method comprises the steps: obtaining an environment factor of an environment where an energy storage power station is located and the equipment information of an energy storage power station site; determining an actual input value, an actual output value, an expected input value and an expected output value of each index of each device of the field devices of the energy storage power station based on the environmental factors of the environment where the energy storage power station is located; a diagnostic value for each indicator of each device is determined based on the real-time input value, the actual output value, the desired input value, and the desired output value for each indicator of each device. The technical problems that an existing fault diagnosis method for the energy storage power station is low in speed and cannot effectively position a fault part, so that the energy storage power station causes economic loss and is low in operation and maintenance efficiency are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage power station fault diagnosis, and in particular to an energy storage power station fault diagnosis method and system. Background Art

[0002] As an important component of renewable energy power generation and grid peak regulation, the safe and stable operation of the power energy storage system is of great significance to ensuring power supply. However, due to factors such as complex equipment and harsh environment of the power energy storage system, the system may fail, affecting its normal operation and causing economic losses. The current method for diagnosing the faults of energy storage power stations is to diagnose the overall equipment of the energy storage power station. This diagnostic method is time-consuming and labor-intensive, and cannot quickly and effectively locate the faulty components. Therefore, a method and system for diagnosing faults in energy storage power stations are proposed to solve the technical problems that the existing fault diagnosis methods of energy storage power stations are slow, cannot effectively locate the faulty parts, cause economic losses to energy storage power stations, and have low operation and maintenance efficiency. Summary of the invention

[0003] The embodiments of the present invention provide a method and system for diagnosing faults in an energy storage power station, which solve the technical problems that the existing fault diagnosis method for energy storage power stations is slow and cannot effectively locate the fault part, causing economic losses to the energy storage power station and low operation and maintenance efficiency.

[0004] According to one aspect of an embodiment of the present invention, a method for diagnosing faults in an energy storage power station is provided, and the method may include: obtaining environmental factors of the environment in which the energy storage power station is located and equipment information on the energy storage power station site; determining the actual input value, actual output value, expected input value, and expected output value of each indicator of each device on the energy storage power station site based on the environmental factors of the environment in which the energy storage power station is located; determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value, and expected output value of each indicator of each device; determining a target diagnostic value of the energy storage power station based on the diagnostic value of each indicator of each device, wherein the target diagnostic value is the overall diagnostic value of the energy storage power station; determining early warning information of the energy storage power station based on the target diagnostic value of the energy storage power station, wherein the early warning information is used to indicate the health of the energy storage power station.

[0005] Optionally, before determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device on-site of the energy storage power station based on the environmental factors of the energy storage power station environment, the method further includes: obtaining multiple historical actual input values ​​and multiple historical actual output values ​​of each indicator of each device on-site of the energy storage power station under multiple environments; determining the expected input value and expected output value of each indicator of each device on-site of the energy storage power station based on the multiple historical actual input values, multiple historical actual output values ​​of each indicator, and the input standard value and output standard value of each indicator of each device on-site of the energy storage power station.

[0006] Optionally, based on multiple historical actual input values ​​of each indicator, multiple historical actual output values, and the input standard value and output standard value of each indicator of each device on-site equipment of the energy storage power station, the expected input value and expected output value of each indicator of each device on-site equipment of the energy storage power station are determined, including: when the difference between the multiple historical actual input values ​​of each indicator of each device and the input standard value of each indicator is less than a preset input threshold, and the difference between the multiple historical actual output values ​​of each indicator of each device and the output standard value of each indicator is less than a preset output threshold, the multiple historical actual input values ​​of each indicator are averaged to obtain the expected input value of each indicator of each device, and the multiple historical actual output values ​​of each indicator are averaged to obtain the expected output value of each indicator of each device.

[0007] Optionally, based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, determining the diagnostic value of each indicator of each device includes: according to the first formula Get the input diagnostic value of each indicator of each device, where: Input diagnostic values ​​for each indicator of each device, is the real-time input value of each indicator of each device, i is each device, j is each indicator of each device, The expected input value for each indicator of each device; according to the second formula Get the output diagnostic value of each indicator of each device, where: Output diagnostic value for each indicator of each device, is the real-time output value of each indicator of each device, i is each device, j is each indicator of each device, is the expected output value of each indicator of each device; based on the input diagnostic value and the output diagnostic value of each indicator of each device, the diagnostic value of each indicator of each device is obtained.

[0008] Optionally, based on the input diagnostic value and output diagnostic value of each indicator of each device, the diagnostic value of each indicator of each device is obtained, including: when the Less than and greater than Said Less than and greater than According to the third formula Get the diagnostic value e of each indicator of each device i j, where is the upper limit of the input diagnostic value of each indicator of each device, is the lower limit of the input diagnostic value of each indicator of each device, is the upper limit of the output diagnostic value of each indicator of each device, is the lower limit value of the output diagnostic value of each indicator of each device, a is the weight factor of the input diagnostic value of each indicator of each device, and b is the weight factor of the output diagnostic value of each indicator of each device.

[0009] Optionally, after determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, the method also includes: when the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device, the alarm unit of each device issues an alarm.

[0010] Optionally, based on the diagnostic value of each indicator of each device, determining the target diagnostic value of the energy storage power station includes: according to the fourth formula The target diagnostic value E of the energy storage power station is obtained, where m is the total number of devices in the energy storage power station, n is the total number of indicators of each device in the energy storage power station, and e i j is the diagnostic value of each indicator of each device.

[0011] Optionally, based on the target diagnostic value of the energy storage power station, early warning information of the energy storage power station is determined, including: when the target diagnostic value of the energy storage power station is greater than a preset target diagnostic threshold, early warning information of the energy storage power station is obtained, wherein the early warning information is based on the target diagnostic value.

[0012] In the embodiment of the present invention, by acquiring the environmental factors of the environment in which the energy storage power station is located and the equipment information on the site of the energy storage power station; based on the environmental factors of the environment in which the energy storage power station is located, determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device on the site of the energy storage power station; based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, determining the diagnostic value of each indicator of each device; based on the diagnostic value of each indicator of each device, determining the target diagnostic value of the energy storage power station, wherein the target diagnostic value is the overall diagnostic value of the energy storage power station; based on the target diagnostic value of the energy storage power station, determining the early warning information of the energy storage power station, wherein the early warning information is used to indicate the health of the energy storage power station, solving the technical problems that the existing fault diagnosis method of the energy storage power station is slow, cannot effectively locate the fault part, causes economic losses to the energy storage power station, and has low operation and maintenance efficiency, achieving the technical effect of improving the fault diagnosis speed of the energy storage power station, accurately locating the fault part of the energy storage power station, reducing the economic losses of the energy storage power station, and improving the operation and maintenance efficiency of the energy storage power station.

[0013] Advantages of the present invention:

[0014] Compared with the existing technology, the present invention compares and calculates the historical data and standard data of each indicator of each device in the energy storage power station, obtains the expected value of each indicator of each device in the energy storage power station, and obtains the diagnostic value of each indicator of each device according to the expected value and the expected upper and lower limits of each indicator of each device. If the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device, the alarm unit of each device will alarm, and the target diagnostic value of the energy storage power station is obtained according to the diagnostic value of each indicator of each device. According to the target diagnostic value, an alarm is issued, which improves the fault diagnosis speed, accurately locates the fault part of the energy storage power station, can better enable the energy storage power station to operate safely, reduce the economic loss of the energy storage power station, and improve the operation and maintenance efficiency of the energy storage power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 is a flow chart of a method for diagnosing a fault in an energy storage power station according to an embodiment of the present invention;

[0017] Figure 2 It is a structural block diagram of a fault diagnosis system for an energy storage power station according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] Example 1

[0021] According to an embodiment of the present invention, a method for diagnosing faults in an energy storage power station is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system containing at least one set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0022] Figure 1 is a flow chart of a method for diagnosing a fault in an energy storage power station according to an embodiment of the present invention. Figure 1 As shown, the method may include the following steps:

[0023] Step S101, obtaining environmental factors of the environment in which the energy storage power station is located and equipment information on the energy storage power station site.

[0024] In the technical solution provided in the above step S101 of the present invention, environmental factors of the environment in which the energy storage power station is located and equipment information on the site of the energy storage power station are obtained through various environmental sensors. It should be noted that the environmental factors of the environment in which the energy storage power station is located may include normal weather, generally abnormal weather, and severely abnormal weather. The equipment information on the site of the energy storage power station may include motors, generators, compressed air energy storage systems, gas tanks, inverters, etc., and it is determined whether the equipment information on the site of the energy storage power station is operating normally.

[0025] Step S102, based on the environmental factors of the environment in which the energy storage power station is located, determine the actual input value, actual output value, expected input value and expected output value of each indicator of each device on-site of the energy storage power station.

[0026] In the technical solution provided in the above step S102 of the present invention, the actual input value, actual output value, expected input value and expected output value of each indicator of each device on-site equipment of the energy storage power station are obtained according to the environmental factors of the environment in which the energy storage power station is located, wherein each indicator value of each device can be the current value, voltage value, impedance value, power, etc. of each device, and the specific needs are based on the specific situation of each device.

[0027] Step S103, determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device.

[0028] In the technical solution provided in the above step S103 of the present invention, the actual input value, actual output value, expected input value, and expected output value of each indicator of each device are calculated to obtain the diagnostic value of each indicator of each device, wherein the diagnostic value of each indicator of each device is used to characterize the health of each indicator of each device.

[0029] Step S104, based on the diagnostic value of each indicator of each device, determine the target diagnostic value of the energy storage power station, wherein the target diagnostic value is the overall diagnostic value of the energy storage power station.

[0030] In the technical solution provided in the above step S104 of the present invention, the diagnostic value of each indicator of each device is added to obtain the target diagnostic value of the energy storage power station, wherein the target diagnostic value is a specific numerical value.

[0031] Step S105, based on the target diagnostic value of the energy storage power station, determining the early warning information of the energy storage power station, wherein the early warning information is used to indicate the health status of the energy storage power station.

[0032] In the technical solution provided in the above step S105 of the present invention, the early warning information of the energy storage power station is obtained according to the target diagnosis value of the energy storage power station, wherein the early warning information can be issued through whistle sounds of different frequencies and indicator lights of different colors.

[0033] The above method of this embodiment is further introduced below.

[0034] As an optional implementation manner, in step S102, before determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device on-site equipment of the energy storage power station based on the environmental factors of the energy storage power station environment, the method also includes: obtaining multiple historical actual input values ​​and multiple historical actual output values ​​of each indicator of each device on-site equipment of the energy storage power station under multiple environments; based on the multiple historical actual input values, multiple historical actual output values ​​of each indicator, and the input standard value and output standard value of each indicator of each device on-site equipment of the energy storage power station, determining the expected input value and expected output value of each indicator of each device on-site equipment of the energy storage power station.

[0035] In this embodiment, multiple historical actual input values ​​and historical actual output values ​​of each indicator of each device of the energy storage power station field equipment under multiple environments are obtained, and the multiple historical actual input values ​​and historical actual output values ​​of each indicator of each device and the input standard value and output standard value of each indicator of each device are compared and calculated to obtain the expected input value and expected output value of each indicator of each device of the energy storage power station field equipment.

[0036] As an optional implementation method, based on multiple historical actual input values ​​of each indicator, multiple historical actual output values, input standard values ​​and output standard values ​​of each indicator of each device of the energy storage power station field equipment, the expected input value and expected output value of each indicator of each device of the energy storage power station field equipment are determined, including: when the difference between the multiple historical actual input values ​​of each indicator of each device and the input standard value of each indicator is less than a preset input threshold, and the difference between the multiple historical actual output values ​​of each indicator of each device and the output standard value of each indicator is less than a preset output threshold, the multiple historical actual input values ​​of each indicator are averaged to obtain the expected input value of each indicator of each device, and the multiple historical actual output values ​​of each indicator are averaged to obtain the expected output value of each indicator of each device.

[0037] In this embodiment, when each difference between multiple historical actual input values ​​of each indicator of each device and the input standard value of each indicator is less than a preset input threshold, when each difference between multiple historical actual output values ​​of each indicator of each device and the output standard value of each indicator is less than a preset output threshold, the multiple historical actual input values ​​of each indicator are averaged to obtain the expected input value of each indicator, and the multiple historical actual output values ​​of each indicator are averaged to obtain the expected output value of each indicator, wherein the expected input value and expected output value of each indicator are both specific numerical values.

[0038] As an optional embodiment, step S103, based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, determines the diagnostic value of each indicator of each device, including: according to the first formula Get the input diagnostic value of each indicator of each device, where: Input diagnostic values ​​for each indicator of each device, is the real-time input value of each indicator of each device, i is each device, j is each indicator of each device, The expected input value for each indicator of each device; according to the second formula Get the output diagnostic value of each indicator of each device, where: Output diagnostic value for each indicator of each device, is the real-time output value of each indicator of each device, i is each device, j is each indicator of each device, is the expected output value of each indicator of each device; based on the input diagnostic value and the output diagnostic value of each indicator of each device, the diagnostic value of each indicator of each device is obtained.

[0039] In this embodiment, is the real-time input value of each indicator of each device, i is each device, j is each indicator of each device, Substitute the expected input value of each indicator for each device into the first formula In the above example, the input diagnostic value of each indicator of each device is obtained. Will is the real-time output value of each indicator of each device, i is each device, j is each indicator of each device, Substitute the expected output value of each indicator of each device into the second formula The output diagnostic value of each indicator of each device is obtained The input diagnostic value and the output diagnostic value of each indicator of each device are calculated to obtain the diagnostic value of each indicator of each device.

[0040] As an optional embodiment, based on the input diagnostic value and output diagnostic value of each indicator of each device, the diagnostic value of each indicator of each device is obtained, including: when the Less than and greater than Said Less than and greater than According to the third formula Get the diagnostic value e of each indicator of each device ij ,in, is the upper limit of the input diagnostic value of each indicator of each device, is the lower limit of the input diagnostic value of each indicator of each device, is the upper limit of the output diagnostic value of each indicator of each device, is the lower limit value of the output diagnostic value of each indicator of each device, a is the weight factor of the input diagnostic value of each indicator of each device, and b is the weight factor of the output diagnostic value of each indicator of each device.

[0041] In this embodiment, the input diagnostic value of each indicator of each device The upper limit of the input diagnostic value for each indicator of each device and the lower limit of the input diagnostic value for each indicator of each device The output diagnostic value of each indicator of each device is within The upper limit of the output diagnostic value of each indicator of each device and the lower limit of the output diagnostic value of each indicator of each device Within, a is the weight factor of the input diagnostic value of each indicator of each device, b is the weight factor of the output diagnostic value of each indicator of each device, and the output diagnostic value of each indicator of each device is and the input diagnostic value of each indicator of each device Substitute into the third formula In the above example, the diagnostic value e of each indicator of each device is obtained. ij .

[0042] As an optional implementation method, in step S103, after determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, the method also includes: when the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device, the alarm unit of each device issues an alarm.

[0043] In this embodiment, if the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device, the alarm unit of each device will sound an alarm, wherein the alarm information will play the name of the device for which the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device.

[0044] As an optional embodiment, step S104, based on the diagnostic value of each indicator of each device, determines the target diagnostic value of the energy storage power station, including: according to the fourth formula The target diagnostic value E of the energy storage power station is obtained, wherein m is the total number of devices in the energy storage power station, and n is the total number of indicators of each device in the energy storage power station.

[0045] In this embodiment, the diagnostic value of each indicator of each device is added up to obtain the target diagnostic value of all devices of the energy storage power station.

[0046] As an optional implementation method, step S105 determines the early warning information of the energy storage power station based on the target diagnostic value of the energy storage power station, including: when the target diagnostic value of the energy storage power station is greater than a preset target diagnostic threshold, the early warning information of the energy storage power station is obtained, wherein the early warning information is issued according to the target diagnostic value.

[0047] In this embodiment, if the target diagnostic value of the energy storage power station is greater than a preset target diagnostic threshold, early warning information of the energy storage power station is obtained, wherein the early warning information is issued based on the target diagnostic value, different target diagnostic values ​​correspond to different intervals, and different intervals correspond to different early warning information.

[0048] In the embodiment of the present invention, by acquiring the environmental factors of the environment in which the energy storage power station is located and the equipment information on the site of the energy storage power station; based on the environmental factors of the environment in which the energy storage power station is located, determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device on the site of the energy storage power station; based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, determining the diagnostic value of each indicator of each device; based on the diagnostic value of each indicator of each device, determining the target diagnostic value of the energy storage power station, wherein the target diagnostic value is the overall diagnostic value of the energy storage power station; based on the target diagnostic value of the energy storage power station, determining the early warning information of the energy storage power station, wherein the early warning information is used to indicate the health of the energy storage power station, solving the technical problems that the existing fault diagnosis method of the energy storage power station is slow, cannot effectively locate the fault part, causes economic losses to the energy storage power station, and has low operation and maintenance efficiency, achieving the technical effect of improving the fault diagnosis speed of the energy storage power station, accurately locating the fault part of the energy storage power station, reducing the economic losses of the energy storage power station, and improving the operation and maintenance efficiency of the energy storage power station.

[0049] Example 2

[0050] According to an embodiment of the present invention, a system for diagnosing a fault in an energy storage power station is also provided. It should be noted that the system for diagnosing a fault in an energy storage power station can be used to execute the method for diagnosing a fault in an energy storage power station in Example 1.

[0051] Figure 2 FIG. 1 is a structural block diagram of a fault diagnosis system for an energy storage power station according to an embodiment of the present invention. Figure 2 As shown, a wind turbine fault warning system may include: a first acquisition unit, a first determination unit, a second determination unit, a third determination unit and a fourth determination unit.

[0052] The first acquisition unit is used to acquire environmental factors of the environment in which the energy storage power station is located and equipment information on the site of the energy storage power station.

[0053] The first determination unit is used to determine the actual input value, actual output value, expected input value and expected output value of each indicator of each device of the energy storage power station on-site equipment based on the environmental factors of the energy storage power station environment.

[0054] The second determining unit is used to determine the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device.

[0055] The third determination unit is used to determine a target diagnostic value of the energy storage power station based on the diagnostic value of each indicator of each device, wherein the target diagnostic value is an overall diagnostic value of the energy storage power station.

[0056] The fourth determining unit is used to determine the early warning information of the energy storage power station based on the target diagnostic value of the energy storage power station, wherein the early warning information is used to indicate the health status of the energy storage power station.

[0057] Optionally, before determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device on-site equipment of the energy storage power station based on the environmental factors of the energy storage power station environment, the system further includes: a second acquisition unit, used to acquire multiple historical actual input values ​​and multiple historical actual output values ​​of each indicator of each device on-site equipment of the energy storage power station under multiple environments; and a fifth determination unit, used to determine the expected input value and expected output value of each indicator of each device on-site equipment of the energy storage power station based on the multiple historical actual input values, multiple historical actual output values ​​of each indicator, and the input standard value and output standard value of each indicator of each device on-site equipment of the energy storage power station.

[0058] Optionally, the fifth determination unit also includes: a processing module, which is used to average the multiple historical actual input values ​​of each indicator to obtain the expected input value of each indicator of each device, and average the multiple historical actual output values ​​of each indicator to obtain the expected output value of each indicator of each device when the difference between the multiple historical actual input values ​​of each indicator of each device and the input standard value of each indicator is less than a preset input threshold, and the difference between the multiple historical actual output values ​​of each indicator of each indicator of each device and the output standard value of each indicator is less than a preset output threshold.

[0059] Optionally, the second determining unit further includes: a first obtaining module for obtaining, according to the first formula Get the input diagnostic value of each indicator of each device, where: Input diagnostic values ​​for each indicator of each device, is the real-time input value of each indicator of each device, i is each device, j is each indicator of each device, is the expected input value of each indicator of each device; the second obtaining module is used to obtain the expected input value of each indicator of each device according to the second formula Get the output diagnostic value of each indicator of each device, where: Output diagnostic value for each indicator of each device, is the real-time output value of each indicator of each device, i is each device, j is each indicator of each device, is the expected output value of each indicator of each device; and a third obtaining module is used to obtain the diagnostic value of each indicator of each device based on the input diagnostic value and the output diagnostic value of each indicator of each device.

[0060] Optionally, the third obtaining module further includes: a first obtaining submodule, which is used when the Less than and greater than Said Less than and greater than According to the third formula Get the diagnostic value e of each indicator of each device ij ,in, is the upper limit of the input diagnostic value of each indicator of each device, is the lower limit of the input diagnostic value of each indicator of each device, is the upper limit of the output diagnostic value of each indicator of each device, is the lower limit value of the output diagnostic value of each indicator of each device, a is the weight factor of the input diagnostic value of each indicator of each device, and b is the weight factor of the output diagnostic value of each indicator of each device.

[0061] Optionally, after determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, the system also includes: a performing unit, which is used for the alarm unit of each device to sound an alarm when the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device.

[0062] Optionally, the third determining unit further includes: a fourth obtaining module for obtaining The target diagnostic value E of the energy storage power station is obtained, where m is the total number of devices in the energy storage power station, n is the total number of indicators of each device in the energy storage power station, and e i j is the diagnostic value of each indicator of each device.

[0063] Optionally, the fourth determination unit further includes: a fifth obtaining module, which is used to obtain early warning information of the energy storage power station when the target diagnosis value of the energy storage power station is greater than a preset target diagnosis threshold, wherein the early warning information is a warning based on the target diagnosis value.

[0064] In this embodiment, the environmental factors of the environment in which the energy storage power station is located and the equipment information on the site of the energy storage power station are obtained by the first acquisition unit; the first determination unit determines the actual input value, actual output value, expected input value and expected output value of each indicator of each device on the site of the energy storage power station based on the environmental factors of the energy storage power station environment; the second determination unit determines the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device; the third determination unit determines the target diagnostic value of the energy storage power station based on the diagnostic value of each indicator of each device, wherein the target diagnostic value is the overall diagnostic value of the energy storage power station; the fourth determination unit determines the early warning information of the energy storage power station based on the target diagnostic value of the energy storage power station, wherein the early warning information is used to indicate the health of the energy storage power station, solves the technical problems that the existing fault diagnosis method of the energy storage power station is slow, cannot effectively locate the fault location, causes economic losses to the energy storage power station, and has low operation and maintenance efficiency, and achieves the technical effect of improving the fault diagnosis speed of the energy storage power station, accurately locating the fault location of the energy storage power station, reducing the economic losses of the energy storage power station, and improving the operation and maintenance efficiency of the energy storage power station.

[0065] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0066] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0068] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0069] In addition, each functional unit in each embodiment of the present invention may be integrated into a first processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0070] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc., various media that can store program codes.

[0071] The above are only preferred embodiments of the present invention. It should be pointed out that ordinary technicians in this technical field can make appropriate improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for diagnosing faults in an energy storage power station, characterized in that: include: Obtaining environmental factors of the environment in which the energy storage power station is located and equipment information on site of the energy storage power station; Based on the environmental factors of the environment in which the energy storage power station is located, determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device on-site of the energy storage power station; Determine a diagnostic value of each indicator of each device based on a real-time input value, an actual output value, an expected input value, and an expected output value of each indicator of each device; Determine a target diagnostic value of the energy storage power station based on the diagnostic value of each indicator of each device, wherein the target diagnostic value is an overall diagnostic value of the energy storage power station; Based on the target diagnostic value of the energy storage power station, early warning information of the energy storage power station is determined, wherein the early warning information is used to indicate the health status of the energy storage power station.

2. A method for diagnosing faults in an energy storage power station according to claim 1, characterized in that: Before determining the actual input value, actual output value, expected input value and expected output value of each indicator of each device of the energy storage power station field equipment based on the environmental factors of the environment of the energy storage power station, the method further includes: Acquire multiple historical actual input values ​​and multiple historical actual output values ​​of each indicator of each device of the energy storage power station field equipment under multiple environments of the energy storage power station; Based on multiple historical actual input values ​​of each indicator, multiple historical actual output values, and the input standard value and output standard value of each indicator of each device on-site of the energy storage power station, the expected input value and the expected output value of each indicator of each device on-site of the energy storage power station are determined.

3. A method for diagnosing faults in an energy storage power station according to claim 2, characterized in that: The determining the expected input value and the expected output value of each indicator of each device of the energy storage power station field equipment based on the multiple historical actual input values ​​of each indicator, the multiple historical actual output values, the input standard value and the output standard value of each indicator of each device of the energy storage power station field equipment includes: When the difference between the multiple historical actual input values ​​of each indicator of each device and the input standard value of each indicator is less than the preset input threshold, and the difference between the multiple historical actual output values ​​of each indicator of each device and the output standard value of each indicator is less than the preset output threshold, the multiple historical actual input values ​​of each indicator are averaged to obtain the expected input value of each indicator of each device, and the multiple historical actual output values ​​of each indicator are averaged to obtain the expected output value of each indicator of each device.

4. A method for diagnosing faults in an energy storage power station according to claim 1, characterized in that: The step of determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value, and expected output value of each indicator of each device comprises: According to the first formula The input diagnostic value of each indicator of each device is obtained, wherein: input diagnostic value for each indicator of each device, is the real-time input value of each indicator of each device, i is each device, j is each indicator of each device, an expected input value for each indicator of each device; According to the second formula The output diagnostic value of each indicator of each device is obtained, wherein: output diagnostic value for each indicator of each device, is the real-time output value of each indicator of each device, i is each device, j is each indicator of each device, is the expected output value of each indicator of each device; Based on the input diagnostic value of each indicator of each device and the output diagnostic value, a diagnostic value of each indicator of each device is obtained.

5. A method for diagnosing faults in an energy storage power station according to claim 4, characterized in that: The obtaining the diagnostic value of each indicator of each device based on the input diagnostic value of each indicator of each device and the output diagnostic value includes: When the Less than and greater than Said Less than and greater than According to the third formula Get the diagnostic value e of each indicator of each device ij ,in, is the upper limit of the input diagnostic value of each indicator of each device, is the lower limit of the input diagnostic value of each indicator of each device, is the upper limit of the output diagnostic value of each indicator of each device, is the lower limit value of the output diagnostic value of each indicator of each device, a is the weight factor of the input diagnostic value of each indicator of each device, and b is the weight factor of the output diagnostic value of each indicator of each device.

6. A method for diagnosing faults in an energy storage power station according to claim 1, characterized in that: After determining the diagnostic value of each indicator of each device based on the real-time input value, actual output value, expected input value and expected output value of each indicator of each device, the method further includes: When the diagnostic value of each indicator of each device exceeds the preset diagnostic value of each indicator of each device, the alarm unit of each device generates an alarm.

7. A method for diagnosing faults in an energy storage power station according to claim 1, characterized in that: The step of determining a target diagnostic value of the energy storage power station based on the diagnostic value of each indicator of each device includes: According to the fourth formula The target diagnostic value E of the energy storage power station is obtained, where m is the total number of devices in the energy storage power station, n is the total number of indicators of each device in the energy storage power station, and e ij is the diagnostic value of each indicator of each device.

8. A method for diagnosing faults in an energy storage power station according to claim 1, characterized in that: The step of determining the early warning information of the energy storage power station based on the target diagnostic value of the energy storage power station includes: When the target diagnosis value of the energy storage power station is greater than a preset target diagnosis threshold, early warning information of the energy storage power station is obtained, wherein the early warning information is issued according to the target diagnosis value.

9. A fault diagnosis system for an energy storage power station, characterized in that: include: A first acquisition unit, used to acquire environmental factors of the environment in which the energy storage power station is located and equipment information on site of the energy storage power station; A first determining unit, configured to determine an actual input value, an actual output value, an expected input value, and an expected output value of each indicator of each device on-site of the energy storage power station based on environmental factors of the environment of the energy storage power station; a second determining unit, configured to determine a diagnostic value of each indicator of each device based on a real-time input value, an actual output value, an expected input value, and an expected output value of each indicator of each device; A third determining unit, configured to determine a target diagnostic value of the energy storage power station based on the diagnostic value of each indicator of each device, wherein the target diagnostic value is an overall diagnostic value of the energy storage power station; The fourth determining unit is used to determine the early warning information of the energy storage power station based on the target diagnostic value of the energy storage power station, wherein the early warning information is used to indicate the health status of the energy storage power station.

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