Safety assessment method, device and equipment of IT grounding system and storage medium

[0038] In order to facilitate understanding of the present application, the present application will be further described below with reference to the related drawings. The embodiment of the present application is given in the drawings. However, the present application can be implemented in many different forms, is not limited to the embodiments described herein. Conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly.

[0039] All technical and scientific terms used herein are commonly understood by those skilled in the art, unless otherwise defined. The terms used herein in the specification of the present application are merely intended to describe the embodiments of the specific embodiments, and is not intended to limit the present application.

[0040] It will be appreciated that the terms "first", "second", and the like as used herein can be used herein to describe various elements, but these components are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0041] It should be noted that when a component is considered to be "connected" another element, it can be directly connected to another element, or connected to another element through the centering element. Further, "connection" in the following examples, if there is an electrical signal or data between the objects being connected, it should be understood as "electrical connection", "communication connection", and the like.

[0042] When used here, "a" "one", and "one", "/" described / this "may include plural form unless otherwise specified. It should also be understood that the term "including" or "having" or "having" specifies the presence of the presentations, part, or combinations of components, part, or their combinations, but do not exclude presence or addition of one or more Other features, overall, steps, operations, components, part, or combinations of combinations.

[0043] The security assessment method of the IT grounding system provided herein can be applied to figure 1 The IT grounding system shown. Such as figure 1 As shown, in which the same bus wire in the IT ground system is connected to multiple devices, such as device 1 ... device N, etc., when the system is operating normally, multiple devices generate a single point ground fault, and when the device occurs single-point ground fault, Fault devices may still be run for a while. If the faulty device fails to exclude normally, the system is likely to occur secondary ground fault. In the IT grounding system, the operation data of the IT ground system device can be monitored by monitoring the device, and the data Upload to the server, the matching device in the server does not have a single ground fault probability and the probability of monitoring the failure of the device when the system is single-point ground fault, and determines the probability of the system's failure in the server, and quantizes the security risks of the assessment system.

[0044] In one embodiment, if figure 2 Distance figure 2 A flow chart of the safety assessment method of the IT grounding system provided by the embodiment. The method is applied to the IT ground system, and the IT grounding system includes a plurality of devices connected to the same DC, the method comprising steps S110 to S130.

[0045] Step S110, determine the first fault probability corresponding to each working state, the target device being at least two of a plurality of devices.

[0046] Among them, the device refers to a plurality of electrical devices of the same power bus in the IT ground system. The target device refers to a plurality of devices of the same power busbar, in a working state. The first fault probability means the probability of failure of the device. Optionally, the first fault probability is the probability of insulating damage in the device, that is, insulation damage to the device is seen as a device failure. Optionally, the first fault probability can be determined by some of the operating parameters of the device, or by experimental determination, or based on empirical parameters, the present embodiment is not limited. The probabilities of the specific device in insulation are damaged, and the probability of extracting the insulation damage in each device is obtained using the experience parameters.

[0047] Optionally, the first fault probability of failure of different devices can be the same or different. In general, if the first fault probability of the device is acquired according to the experience parameter, the first fault probability corresponding to the different devices is the same.

[0048]In the present embodiment, specifically, by determining the probability of the ground fault of each device, evaluating the security risks of the system failure, if the probability of insulating damage to each device is determined according to the empirical parameters, reduce the calculation amount, reduce the calculation, and reduce the calculation. Avoid calculating the probability of performing insulation damage of each device.

[0049] Step S120 determines the system failure probability of the IT ground system based on the first fault probability corresponding to each target device.

[0050] Among them, the system failure probability refers to the probability of failure of IT grounding systems. Optionally, the probability of failing in one of the target devices can be used as the system fault probability, or the probability of at least two target devices fails simultaneously as the system fault probability, specifically refers to a single-point grounding failure of a device, except Outside of the faulty device, the probability of ground faults in other devices, that is, the probability of two-point ground fault.

[0051] In step S130, the security risk of the IT ground system is determined according to the system fault probability, wherein the lower the system failure probability, the lower the security risk of the IT ground system.

[0052] In this step, if the system fault probability is, the lower the possibility of the IT ground system failure, the lower the security risks of the IT ground system; the reason is similar, the higher the system fault probability, then the IT grounding system The higher the possibility of failure, the higher the security risks of the IT ground system.

[0053] The technical solution of the present embodiment, by determining the first fault probability corresponding to each working state, the target device is at least two of a plurality of devices; determined according to the first fault probability corresponding to each target device The system failure probability of the IT ground system; the security risk of the IT ground system is determined according to the system fault probability, wherein the lower the system fault probability, the lower the security risks of the IT ground system, and IT can be assessed. The security risks of the grounding system.

[0054] Optional, after determining the security risks of the IT ground system, if the security risk is higher than the preset security risks, the alarm prompt can be issued so that the operation and maintenance personnel investigate in time, avoiding the IT grounding system after the failure Increase the security of IT grounding systems.

[0055] In one embodiment, the first fault probability corresponding to each target device determines the system fault probability of the IT ground system, including: determining the IT ground system according to the first fault probability corresponding to each target device. The probability of a two-point fault; the probability of a two-point failure occurs as the system failure probability.

[0056] In the present embodiment, it is understood that the probability of a two-point ground fault can be accurately quantified by the probability of a two-point failure in the IT ground system as the system fault probability.

[0057] Specifically, in the IT ground system, the power-end neutral point is highly blocked, and the equipment housing is directly grounded. Since the power-end neutral point is highly blocked, the low-voltage DC IT grounding system has a small characteristic of the fault current, and the security is high, so the IT grounding system has essential security for single-point ground faults, so IT can be ignored. The case where the grounding system is single-point ground fault, the probability of the two-point ground fault is used as the system fault probability, and the system fault probability can be more accurate.

[0058] In one embodiment, the IT grounding system further includes a monitoring device, the monitoring device for monitoring the IT grounding system generating a single point failure, the method further comprising: determining the second fault probability corresponding to the monitoring device The first fault probability corresponding to each target device determines a probability of two point failures in the IT ground system, including: determining the first fault probability corresponding to each target device and each target device. The probability of a two-point fault occurs in the IT grounding system.

[0059] Specifically, a single device allows a single device to operate in the IT ground system to determine the fault location and troubleshoot by the insulation monitoring device (IMD) alarm and troubleshoot, reflecting the equipment safety electrical safety through the first fault probability, but If a single failure occurs, IMD invalidation, failed to turn alarm in time, a serious two-point ground fault in the system, by determining the system failure probability of IT grounding system by the probability of the first fault probability and IMD failure corresponding to each target device The probability of quantifying the occurrence of two-point grounding failure; determines the security risks of the IT grounding system through the system failure probability, the lower the system failure probability, the lower the security risks of the IT grounding system.

[0060] Among them, the monitoring device refers to a device that monitors whether the system device has an insulating fault. The specific IMD monitoring device; when a device occurs single-point ground fault and remains run, determine the monitoring device corresponding The second fault probability. Among them, the second fault probability is the probability of monitoring the failure of the device. If the monitoring device is faulty, the monitoring device cannot find a single point failure, so the second fault probability can be understood that the monitoring device cannot properly exclude the probability of single-point fault, wherein Including the location where the first point device failure occurs, the first point device fault is not allowed to remove the first point device fault; the probability of the probability of the second fault and the probability of the first fault corresponding to the respective target devices under the same bus The probability calculation formula for binding two-point ground fault determines the probability of two point failures in the IT grounding system.

[0061] In the present embodiment, it is understood that in the IT grounding system, the probability of IMD expires by determining the first fault probability corresponding to the target device in the same DC power bus line, and the probability of IMD failure when the target device occurs single-point ground fault. Determine the system failure probability of the IT ground system, evaluating the security risk of IT grounding system, quantifying the occurrence probability of two-point ground ground fault, and accurately quantifying the security risks of IT grounding systems.

[0062] It will be appreciated that the probability that the IT grounding system has a two-point fault occurs through the second fault probability and the first fault probability corresponding to each target device, and the introduction of the monitoring device has not been able to block the probability of the first point fault, accurately. The system fault probability is obtained.

[0063] Specifically, in the IT ground system, the power-end neutral point is highly blocked, and the equipment housing is directly grounded. Since the power-end neutral point is highly blocked, the low-voltage DC IT ground system has a small characteristic of the fault current, and the security is high, so the IT grounding system is essential for single-point ground faults. However, the overcurrent type protection equipment is not easy to operate, and the faulty device cannot be removed in time, avoiding the spread of faults. Therefore, the IT grounding system allows the fault to run for a while, and the location of the fault point is determined by the Insulation Monitoring Device (IMD) alarm, and troubleshooting in time. However, if IMD invalid, it failed to turn alarm in a timely manner, the system will cause a serious two-point grounding failure in the belt fault.

[0064] Exemplary, assuming that the first fault probability of different target devices is the same, and the IT ground system is set to have a monitoring device, the calculation formula of the system failure probability is:

[0065]

[0066] In the formula, n is the number of devices that work under the same DC power bus, that is, the number of target devices; the probability of insulation damage in each device, that is, the first fault probability; P2 is IMD failure probability, that is, the second fault Probability; PY is two-point ground fault probability, that is, the system fault probability.

[0067] In the IT grounding system, it is determined that the probability P1 of the insulation damage of N devices under the same DC bus, and the probability P2 of IMD failure when a device is faulty, the probability P2 of two-point ground fault is calculated. Determine the two-point ground fault.

[0068] In one embodiment, it is determined that the first fault probability corresponding to the target device in the operating state is determined, including the target device information corresponding to each of the target devices; determines each of the target devices according to the target device information. The corresponding first fault probability.

[0069] Among them, the target device information refers to information that affects the damage damage of the device. Specifically, the device type, device usage time, device usage environment, device usage conditions, etc., determine the probability of the first fault in the system according to the target information .

[0070] Specifically, the correspondence between the device information and the fault probability is determined, and the target device information can be determined according to the target device information, according to the target device information, according to the target device information.

[0071] In the present embodiment, the probability of determining the first fault in the system is determined by the target device information, which is equivalent to considering the working conditions of different devices, the resulting fault probability is more accurate, and the defined system fault probability is also more accurate. To accurately reflect the safety of the system.

[0072] In one embodiment, the target device information includes at least one of a device type, a device model, a device usage time, and a device usage environment.

[0073] In the present embodiment, the probability of determining the first fault in the system is determined by the target device information, which is equivalent to considering the working conditions of different devices, the resulting fault probability is more accurate, and the defined system fault probability is also more accurate. To accurately reflect the safety of the system.

[0074] In one embodiment, the target device information determines the first fault probability corresponding to each of the target devices, including: calling the fault probability database, the fault probability database presets different device information and fault probability The correspondence; the matching device information that matches the target device information is found in the fault probability database; when the matching device information is found, the fault probability corresponding to the matching device information is used as the first A fault probability.

[0075] Among them, the fault probability database is established in the server, network disk, and local computer hard drive. When you need to call data in the fault probability database, send match information to the server, network disk, and local computer, and look for from the fault probability database. Matching device information matches the target device information; in the case of finding the matching device information, the fault probability corresponding to the matching device information is used as the first fault probability. The matching device information of the fault probability database and the target device information are regularly updated.

[0076] In the present embodiment, in the IT grounding system, by establishing a fault probability database, the first fault probability and device information stored in the system are stored, and when evaluating system security risks, call the fault probability database corresponding to the data, which is convenient for data finishing. And store, achieve data concentration, save the cost of acquiring the first fault probability of the first fault probability multiple times.

[0077] It should be noted that the correspondence of the device information and the fault probability can be established by pre-experiment, and stored in the fault probability database, the device information and fault probability of the fault probability database can be called from the fault probability database when determining the first fault probability. The correspondence, thereby determining the first fault probability of the target device.

[0078] In one embodiment, the method further comprises monitoring operational data of each device; determines at least two of the target devices in a working state based on the operational data.

[0079] The operation data refers to the data in the running process. This embodiment determines which devices in operation by running data, thereby determining a target device in a working state. Optionally, running data includes, but is not limited to, voltage parameters, current parameters, and the like, the present embodiment is not limited.

[0080] Among them, the operation data of each device is detected when the IT grounding system is working properly and when the IT grounding system is single-point short-circuit fault, the target device is determined.

[0081] In the present embodiment, the target device is determined by monitoring the operation of each device, and thereby evaluating the security risks of two-point ground fault depending on the fault probability of the target device.

[0082] It should be understood that although figure 2 The various steps in the flowchart are displayed in accordance with the instructions of the arrow, but these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the implementation of these steps does not have a strict order, which can be performed in other order. and, figure 2 At least a portion of the steps may include multiple steps or multiple stages, which do not necessarily perform completion at the same time, but can be performed at different times, and these steps or phases do not necessarily Alternatively, it can be performed or alternately performed with at least a portion of the steps or stages in other steps or other steps.

[0083] Such as image 3 As shown in one embodiment, a security assessment device for an IT ground system is provided, and the IT grounding system is applied, and the IT grounding system includes a plurality of devices connected to the same DC bore, the device comprising: device failure determination Module 210, system failure determination module 220, and security evaluation module 230, wherein the device fault determination module 210 is configured to determine the first fault probability corresponding to each working state, the target device in a plurality of devices. At least two; system fault determination module 220, configured to determine the system fault probability of the IT ground system according to the first fault probability corresponding to each target device; safety evaluation module 230 for determining the system failure probability The security risks of the IT grounding system, where the system fault probability is, the lower the security risks of the IT ground system.

[0084] In one embodiment, the system fault determination module includes a two-point fault determination unit, two-point fault determination unit for determining the probability of two point failures in the IT ground system according to the first fault probability corresponding to each target device; The probability of a two-point failure occurs as the system fault probability of the system.

[0085] In one embodiment, the two-point fault determination module further includes a device second fault determination unit, a system two-point fault determination unit, and an apparatus second fault determination unit determines the second fault probability corresponding to the monitoring device; The first fault probability corresponding to the target device determines the probability of two point failures in the IT grounding system, including: two, according to the second fault probability and the first fault probability corresponding to each target device, two of the IT ground systems Point fault probability.

[0086] In one embodiment, the device failure determination module includes: a device information acquisition unit and a device failure determination unit, wherein the device information acquisition unit is used to acquire target device information corresponding to each of the target devices; device failure determination unit is used for The target device information determines a first fault probability corresponding to each of the target devices.

[0087] In one embodiment, the target device information includes at least one of a device type, a device model, a device usage time, and a device usage environment.

[0088] In one embodiment, the device fault determination unit includes: information call subunit, device matching unit, and fault probability determination subunit, where the information call subunion is used to invoke the fault probability database, the fault probability database is pre-stored in advance The correspondence between the device information and the fault probability; the device matching substructure is used to find matching device information that matches the target device information from the fault probability database; the fault probability determination sub-unit is used to find the matching device In the case of information, the fault probability corresponding to the matching device information is used as the first fault probability.

[0089] In one embodiment, the security assessment apparatus of the IT ground system further includes: a two-point fault determination module, a two-point fault determination module, is used to determine two points in the IT ground system according to the first fault probability corresponding to each target device. The probability of the fault; the probability of a two-point failure occurs as the system failure probability of the system.

[0090] The specific limits of the security assessment device of the IT grounding system can be found in the above-mentioned security assessment method for the IT grounding system, and details are not described herein again. Each module in the security assessment device of the above IT ground system can be implemented through software, hardware, and combinations thereof. The above modules may be embedded or independent of the processor in the computer device, and may be stored in a memory device in a memory device in a software form. It should be noted that the division of the module in the present application is schematic, only a logical function division, and there may be another divisional method when actually implemented.

[0091] In one embodiment, a computer device is also provided, including a memory and a processor, a computer program stored in a memory, which implements the steps in each method embodiment when performing a computer program.

[0092] In one embodiment, a computer readable storage medium is provided, which stores a computer program that implements the steps in each method embodiment when executed by the processor.

[0093] One of ordinary skill in the art will appreciate that all or part of the flow in the above-described embodiment, is to be done by a hardware that can be related to instructions by a computer program, and the computer program can be stored in one non-volatile computer readable storage. In the medium, the computer program may include the flow of an embodiment of each method described above. Among them, any reference to the memory, storage, database, or other medium used in the various embodiments provided herein can include at least one of a nonvolatile and volatile memory. Non-volatile memory can include read-only memory, ROM, tape, floppy disk, flash memory or optical memory, and the like. Volatile memory can include a random access memory (RAM) or an external cache. As a description, the RAM can be in a variety of forms, such as static random access memory, SRAM or dynamic random access memory (DRAM), and the like.

[0094] In the description of this specification, the description of the reference terms "some embodiments", "Other Embodiments", "Ideal Examples", etc., meant to incorporate the specific features, structures, materials, or features described in connection with this embodiment or examples. At least one embodiment or example of the invention. In the present specification, the schematic description of the above terms is not necessarily referred to as the same embodiments or examples.

[0095] The various technical features of the above embodiments can be arbitrarily combined, in order to make the description, the various technical features of the above embodiments are not described, however, as long as the combination of these technical features does not have contradictions, it should It is considered to be the scope of this specification.

[0096] The above embodiments are merely expressed in several embodiments of the present application, which are described more specific and detailed, but it is not understood to limit the limitation of the invention. It should be noted that for those skilled in the art, several deformations and modifications can be made without departing from the context of this application, which belongs to the scope of the present application. Therefore, the scope of protection of the patent according to the present application should be taken in the appended claims.