Relay protection operation setting value security detection method, device and readable storage medium

Abstract

This invention provides a method, device, and readable storage medium for detecting the safety of relay protection operating settings. It considers the rationality of the numerical operating settings of the target relay protection device, determining a first safety score relative to the numerical operating settings. It also considers the issues of anti-over-level protection activation and anti-over-level network communication status, determining a second safety score. Finally, it considers the issue of accurate leakage current protection activation, determining a third safety score. By comprehensively considering all the above scores, a total safety score for the operating settings of the target relay protection device is obtained. This total safety score is then compared with a safety threshold to obtain the safety detection result of the operating settings of the target relay protection device. This detection method can accurately reflect the safety status of the operating settings of the target relay protection device, helping to understand the safety status of the operating settings and prevent accidents.

Description

Technical Field

[0001] This invention belongs to the field of power grid safety technology, and in particular relates to a method, equipment and readable storage medium for detecting the safety of relay protection operation settings. Background Technology

[0002] In power supply systems, relay protection devices are crucial for real-time monitoring of the protected equipment. Upon the occurrence of a fault or abnormality, they immediately issue an alarm signal or directly isolate and disconnect the faulty component. The protection settings of relay protection devices are important parameters controlling their operational behavior. Taking coal mine power supply systems as an example, most systems now have relay protection devices installed, effectively monitoring the operation and protecting coal mine electrical equipment from faults. While some coal mine power supply systems use specialized setting calculation software to calculate the protection settings, this is only for guiding manual modifications to the operating settings. Once the power supply structure is adjusted or equipment is replaced, the changes in the protection settings cannot be reflected in a timely manner.

[0003] It is evident that the current power supply system cannot perform safety testing on the operating settings of relay protection devices to prevent accidents, thus posing a safety hazard. Summary of the Invention

[0004] Based on this, and in response to the aforementioned technical problems, a method, device, and readable storage medium for detecting the safety of relay protection operation settings are provided.

[0005] The technical solution adopted in this invention is as follows:

[0006] As a first aspect of the present invention, a method for detecting the safety of relay protection operation settings is provided, comprising:

[0007] S101. Determine the degree of deviation between each numerical class operating setting value of the target relay protection device and the corresponding calculated setting value range. Based on the degree of deviation and importance of each numerical class operating setting value, determine the first safety score of the target relay protection device relative to the numerical class operating setting value.

[0008] S102. Determine the second safety score of the target relay protection device relative to the first state class operation setting value based on the first state class operation setting value of the target relay protection device. The first state class operation setting value includes the activation / deactivation status of the anti-overpass protection and the communication status of the corresponding anti-overpass network.

[0009] S103. Determine the third safety score of the target relay protection device relative to the second state class operation setting value based on the second state class operation setting value, wherein the second state class operation setting value includes the on / off state of the precise leakage current protection.

[0010] S104. Determine the total safety score of the target relay protection device's operating settings based on each safety score and its corresponding importance.

[0011] S105. Compare the total safety score with the safety threshold to obtain the safety test result of the operating setting of the target relay protection device.

[0012] As a second aspect of the present invention, an electronic device is provided, including a storage module, the storage module including instructions loaded and executed by a processor, the instructions, when executed, causing the processor to perform a relay protection operation setting safety detection method according to the first aspect described above.

[0013] As a third aspect of the present invention, a computer-readable storage medium is provided that stores one or more programs, which, when executed by a processor, implement the relay protection operation setting safety detection method of the first aspect described above.

[0014] This invention addresses the rationality of the numerical operating settings of a target relay protection device. Based on the deviation and importance of each numerical operating setting, a first safety score is determined relative to the numerical operating settings. A second safety score is determined considering the activation of anti-overlap protection and the status of anti-overlap network communication. A third safety score is determined considering the precise activation of leakage current protection. Finally, by comprehensively considering all scores, a total safety score for the operating settings of the target relay protection device is obtained. This total safety score is then compared with a safety threshold to obtain the safety detection result of the operating settings. This detection method accurately reflects the safety status of the operating settings of the target relay protection device, helping to understand its safety status and prevent accidents. Attached Figure Description

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 A flowchart of a relay protection operation setting safety detection method provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of the present invention. The corresponding embodiments below are only for clearly illustrating the inventive content of this patent and are not intended to limit its implementation. For those skilled in the art, different variations and modifications can be made based on the embodiments described. Any variations or modifications that fall within the technical concept and inventive content of this invention and are obvious are also within the protection scope of this invention.

[0019] The embodiments of the present invention are applied to coal mine power grids. Based on the coal mine power grid real-time monitoring system and the online setting value calculation system, the current operating setting value of each relay protection device can be obtained in real time through the power grid real-time monitoring system, and the calculation setting value range of the relay protection device can be calculated through the online setting value calculation system.

[0020] In this embodiment, the operating settings are divided into numerical operating settings, first-state operating settings, and second-state operating settings. Numerical operating settings refer to short-circuit protection threshold, overcurrent protection threshold and time, overload protection threshold and time, etc. The first-state operating settings refer to the enabled / disabled status of anti-overcurrent protection and the communication status of the corresponding anti-overcurrent network. The second-state operating settings refer to the enabled / disabled status of precise leakage current protection.

[0021] like Figure 1 As shown in the figure, this invention provides a method for detecting the safety of relay protection operation settings, the specific process of which is as follows:

[0022] S101. Determine the degree of deviation between each numerical class operating setting value of the target relay protection device and the corresponding calculated setting value range. Based on the degree of deviation and importance of each numerical class operating setting value, determine the first safety score of the target relay protection device relative to the numerical class operating setting value.

[0023] 1. Obtain the operating setpoints and corresponding calculated setpoint ranges for each numerical category of the target relay protection device. The target relay protection device refers to the relay protection device currently participating in the safety test of the operating setpoints. It can be specified manually or automatically according to a preset order.

[0024] 2. Calculate the deviation Zi of each numerical class's running constant value from the corresponding calculated constant value range using formulas (1)-(3):

[0025]

[0026] Zi = 1 (I jsmin ≤I yxdz ≤I jsmax (2)

[0027]

[0028] Among them, I yxdz I is the target running setpoint for the current calculated deviation degree Zi. jsmin The lower limit of the calculation range of the target running setpoint is I. jsmax The upper limit of the calculated setpoint range is determined for the target operation setpoint.

[0029] 3. Calculate the first safety score Hk of the target relay protection device relative to the numerical operation setting using formula (4):

[0030] Hk=(Σ(Zi*Ki))÷(ΣKi) (4)

[0031] Where Ki is the importance coefficient for each numerical class operating setting, i is a positive integer from 1 to N, and N is the number of numerical class operating settings of the target relay protection device.

[0032] For example, if a certain relay protection device has three numerical operation settings: short circuit protection threshold, overcurrent protection threshold and time, the three numerical operation settings Z1, Z2 and Z3 can be obtained by formula (1)-(3). Here, the importance coefficients of short circuit protection threshold, overcurrent protection threshold and time can be set to 1.4, 0.8 and 0.8 respectively, and then the first safety score Hk of the relay protection device can be calculated by formula (4).

[0033] S102. Determine the second safety factor of the target relay protection device relative to the first state class operating setting based on the first state class operating setting of the target relay protection device:

[0034] 1. Obtain the first state-level operating settings of the target relay protection device: the activation / deactivation status of the anti-overpass protection and the communication status of the corresponding anti-overpass network.

[0035] 2. Calculate the second safety score Ak of ​​the target relay protection device relative to the first state class operating setting using formula (5):

[0036] Ak=(-1)*(Gi|Ti) (5)

[0037] Where Gi represents the enabled / disabled status of the anti-overpass protection of the target relay protection device, with 0 indicating enabled status and 1 indicating otherwise. Ti represents the communication status of the corresponding anti-overpass network of the target relay protection device, with 0 indicating normal communication and 1 indicating otherwise.

[0038] In formula (5), the symbol | represents the AND operation. When both Gi and Ti are 0, (Gi|Ti) is 0. When either Gi or Ti is 1, (Gi|Ti) is 1.

[0039] S103. Determine the third safety factor of the target relay protection device relative to the second state class operating setting based on the second state class operating setting of the target relay protection device:

[0040] 1. Obtain the second state-type operating setting of the target relay protection device: the on / off state of the precise leakage current protection.

[0041] 2. Calculate the third safety factor Lk of the target relay protection device relative to the second state class operating setting using formula (6):

[0042] Lk=(-1)*Pi (6)

[0043] Where Pi represents the enabled / disabled state of the precise leakage current protection of the target relay protection device, which is 0 when enabled and 1 otherwise.

[0044] S104. Determine the total safety score of the target relay protection device's operating settings based on each safety score and its corresponding importance:

[0045] 1. Calculate the total safety score Si of the target relay protection device's operating settings using formula (7):

[0046] Si=(C1*Hk+C2*Ak+C3*Lk) / B (7)

[0047] Where C1, C2, and C3 are the importance weights of Hk, Ak, and Lk, respectively, and B is the total weight. Considering that Ak and Lk are reverse scores (0 or 1), B is set to C1.

[0048] S105. Compare the total safety score with the safety threshold to obtain the safety test result of the target relay protection device's operating setting.

[0049] The security threshold can be set to a single value. When the total security score Si is greater than or equal to the security threshold, the security detection result is considered safe. If it is lower than the security threshold, it is considered unsafe. Of course, multiple security threshold values ​​can also be set to obtain more granular security detection results.

[0050] As can be seen from the above, the method of this embodiment takes into account the rationality of the numerical operating settings of the target relay protection device. Based on the deviation degree and importance of each numerical operating setting of the target relay protection device, a first safety score of the target relay protection device relative to the numerical operating settings is determined. Considering the issues of anti-over-level protection activation and anti-over-level network communication status, a second safety score of the target relay protection device is determined. Considering the issue of accurate leakage current protection activation, a third safety score of the target relay protection device is determined. Finally, by comprehensively considering the above scores, a total safety score of the operating settings of the target relay protection device is obtained. Then, the total safety score is compared with a safety threshold to obtain the safety detection result of the operating settings of the target relay protection device. This detection method can accurately reflect the safety status of the operating settings of the target relay protection device, which helps to understand the safety status of the operating settings of the target relay protection device and prevent accidents from occurring.

[0051] It is understandable that through the above steps S101-S105, the operating settings of each relay protection device in the coal mine power grid can be tested for safety. Based on this, the safety status of the coal mine power grid can be further understood. The specific process is as follows:

[0052] First, based on the total safety score of each relay protection device and its corresponding importance, determine the overall safety score of the target power grid's operating settings:

[0053] The safety comprehensive score D of the target power grid's operating setpoint is calculated using formula (8):

[0054] D=(ΣFi*Si)÷M (8)

[0055] Where Fi is the importance factor of each relay protection device in the target power grid, and M is the number of relay protection devices in the target power grid.

[0056] Then, the comprehensive safety score is compared with the safety threshold to obtain the safety test result of the target power grid's operating setpoint.

[0057] The following provides an example illustration of the method of the present invention.

[0058] For ease of explanation, assume that a coal mine power grid has 3 relay protection devices.

[0059] #1 Relay Protection Device:

[0060] The calculated short-circuit protection setting range is 50-70A, and the operational short-circuit protection setting is 80A.

[0061] The calculated overcurrent protection setting is 38-48A, and the operational overcurrent protection setting is 49A.

[0062] The calculated overload protection setting is 25-35A, and the operating overload protection setting is 38A.

[0063] Anti-overpass protection is in operation, and anti-overpass network communication is normal.

[0064] Precise leakage current protection implementation;

[0065] #2 Relay Protection Device:

[0066] The calculated short-circuit protection setting range is 50-70A, and the operational short-circuit protection setting is 60A.

[0067] The calculated overcurrent protection setting range is 38-48A, and the operating overcurrent protection setting is 40A.

[0068] The calculated overload protection setting range is 25-35A, and the operating overload protection setting is 25A.

[0069] Anti-overpass protection is in operation, and anti-overpass network communication is normal.

[0070] Precise leakage current protection implementation;

[0071] #3 Relay Protection Device:

[0072] The calculated short-circuit protection setting range is 50-70A, and the operational short-circuit protection setting is 48A.

[0073] The calculated overcurrent protection setting range is 38-48A, and the operating overcurrent protection setting is 35A.

[0074] The calculated overload protection setting range is 25-35A, and the operating overload protection setting is 23A.

[0075] Invest in protection against escalating security levels to prevent abnormal network communication.

[0076] Precise leakage current protection has been implemented.

[0077] In this context, Ki and Fi are both set to 1, C1 = 3, C2 = C3 = 0.5, and the security thresholds are set to 0.7 and 0.8. When Si is less than 0.7, it indicates that the security of the running setpoint is low. When Si is greater than or equal to 0.7 and less than 0.8, it indicates that the security of the running setpoint is moderate. When Si is greater than or equal to 0.8, it indicates that the security of the running setpoint is high.

[0078] For relay protection device #1:

[0079] Z1=1-(80-70) / (70-50)=0.5;

[0080] Z2=1-(49-48) / (48-38)=0.9;

[0081] Z3 = 1 - (38 - 35) / (35 - 25) = 0.7;

[0082] H1#=(0.5+0.9+0.7) / 3=0.7;

[0083] A1# = 0;

[0084] L1# = 0;

[0085] S1# = (3 * 0.7 + 0 + 0) / 3 = 0.7;

[0086] Safety test results: The safety of the operating settings of relay protection device #1 is average.

[0087] For relay protection device #2:

[0088] Z1 = 1;

[0089] Z2 = 1;

[0090] Z3 = 1;

[0091] H2#=(1+1+1) / 3=1;

[0092] A2# = 0;

[0093] L2# = 0;

[0094] S2#=(3*1+0+0) / 3=1;

[0095] Safety test results: The operating settings of relay protection device #2 have high safety.

[0096] For relay protection device #3:

[0097] Z1=1-(50-48) / (70-50)=0.9;

[0098] Z2=1-(38-35) / (48-38)=0.7;

[0099] Z3 = 1 - (25 - 23) / (35 - 25) = 0.8;

[0100] H3#=(0.9+0.7+0.8) / 3=0.8;

[0101] A3# = -1;

[0102] L3# = 0;

[0103] S3#=(3*0.8-0.5*1+0) / 3=0.63

[0104] Safety test results: The safety of the operating settings of relay protection device #3 is low.

[0105] Finally, D = (0.7 + 1 + 0.63) / 3 = 0.77. The safety test result is that the safety of the operating setpoint of the coal mine power grid is generally acceptable.

[0106] Similar to the above concept, Figure 2 A schematic block diagram of the structure of an electronic device provided by an embodiment of the present invention is shown.

[0107] For example, the electronic device includes a storage module 11 and a processor 12. The storage module 11 includes instructions loaded and executed by the processor 12. When executed, the instructions cause the processor 12 to perform the steps described in the section on a method for detecting the safety of relay protection operation settings according to various exemplary embodiments of the present invention.

[0108] It should be understood that processor 12 can be a Central Processing Unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, the general-purpose processor can be a microprocessor or any conventional processor.

[0109] This invention also provides a computer-readable storage medium that stores one or more programs, which, when executed by a processor, implement the steps described in the section on the method for detecting the safety of relay protection operation settings according to various exemplary embodiments of the invention.

[0110] Those skilled in the art will understand that all or some of the steps, systems, and apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software can be distributed on a computer-readable storage medium, which may include computer-readable storage media (or non-transitory media) and communication media (or transient media).

[0111] As is known to those skilled in the art, the term computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, it is known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0112] For example, the computer-readable storage medium may be an internal storage unit of the electronic device described in the foregoing embodiments, such as a hard disk or memory of the electronic device. The computer-readable storage medium may also be an external storage device of the electronic device, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, etc., provided on the electronic device.

[0113] The electronic devices and computer-readable storage media provided in the foregoing embodiments, considering the rationality of the numerical class operating settings of the target relay protection device, determine a first safety score of the target relay protection device relative to the numerical class operating settings based on the deviation degree and importance of each numerical class operating setting of the target relay protection device. Considering the issues of anti-over-level protection activation and anti-over-level network communication status, a second safety score of the target relay protection device is determined. Considering the issue of accurate leakage current protection activation, a third safety score of the target relay protection device is determined. Finally, by comprehensively considering the above scores, a total safety score of the operating settings of the target relay protection device is obtained. Then, the total safety score is compared with a safety threshold to obtain the safety detection result of the operating settings of the target relay protection device. This detection method can accurately reflect the safety status of the operating settings of the target relay protection device, which helps to understand the safety status of the operating settings of the target relay protection device and prevent accidents from occurring.

[0114] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for detecting security of protection operation setting values, characterized by, The method comprises: S101, determining the deviation degree of each numerical class operating setting value of a target relay protection device from the corresponding calculation setting value range, and determining the first security score of the target relay protection device relative to the numerical class operating setting value according to the deviation degree and the importance degree of each numerical class operating setting value: Obtaining each numerical class operating setting value of the target relay protection device and the corresponding calculation setting value range; Calculating the deviation degree Zi of each numerical class operating setting value from the corresponding calculation setting value range by formula (1)-(3): (1) (2) (3) wherein is a target operating setpoint currently being computed for the deviation Zj, is a lower limit of a computed setpoint range corresponding to the target operating setpoint, is an upper limit of a computed setpoint range corresponding to the target operating setpoint; Calculating the first security score Hk of the target relay protection device relative to the numerical class operating setting value by formula (4): (4) wherein, is the importance coefficient of the fixed value of the each numerical class, i is a positive integer from 1 to N, and N is the number of the fixed values of the numerical classes of the target relay protection device. S102, determining the second security score of the target relay protection device relative to the first state class operating setting value according to the first state class operating setting value of the target relay protection device, wherein the first state class operating setting value comprises the on-off state of the anti-overload protection and the communication state of the corresponding anti-overload network: Obtaining the first state class operating setting value of the target relay protection device: the on-off state of the anti-overload protection and the communication state of the corresponding anti-overload network; Calculating the second security score Ak of the target relay protection device relative to the first state class operating setting value by formula (5): (5) wherein, is the state of the anti-override protection of the target relay protection device, 0 for being put into operation, otherwise 1, is the communication state of the corresponding anti-override network of the target relay protection device, 0 for normal communication, otherwise 1; S103, determining the third security score of the target relay protection device relative to the second state class operating setting value according to the second state class operating setting value of the target relay protection device, wherein the second state class operating setting value comprises the on-off state of the accurate leakage protection: Obtaining the second state class operating setting value of the target relay protection device: the on-off state of the accurate leakage protection; Calculating the third security score Lk of the target relay protection device relative to the second state class operating setting value by formula (6): (6) wherein, is the on-off state of the accurate leakage protection of the target relay protection device, 0 for on, otherwise 1; S104, determining the security total score of the operating setting value of the target relay protection device according to the security scores and the corresponding importance degrees: Calculating the security total score Si of the operating setting value of the target relay protection device by formula (7): (7) wherein, respectively, are the importance weights of the Hk, Ak, Lk, B is the total weight, taking into account is the reverse score, B takes the value C1; S105, comparing the security total score with the security threshold to obtain the security detection result of the operating setting value of the target relay protection device.

2. The method of claim 1, wherein the method further comprises: Further comprising: S106, obtaining the security detection result of the operating setting value of each target relay protection device of the target power grid according to S101-S105.

3. The method of claim 2, wherein the method further comprises: Further comprising: S107, determining the security comprehensive score of the operating setting value of the target power grid according to the security total score of each relay protection device and the corresponding importance degree; S108, comparing the security comprehensive score with the security threshold to obtain the security detection result of the operating setting value of the target power grid.

4. The method of claim 3, wherein the security of the operation setting values of the protection is detected by using the following equation: ###00006### where, A is the security of the operation setting values of the protection, and B is the security of the operation setting values of the protection. The S107 further comprises: Calculating the security comprehensive score D of the operating setting value of the target power grid by formula (8): (8) wherein, a significance factor for each relay protection device of the target power grid, a number of relay protection devices of the target power grid.

5. An electronic device, comprising: The storage module comprises instructions loaded and executed by the processor, which, when executed, causes the processor to perform the relay protection operating setting value security detection method according to any one of claims 1-4.

6. A computer-readable storage medium storing one or more programs, the one or more programs comprising instructions executable by one or more processors to perform all or a subset of: The one or more programs, when executed by the processor, implement the method for detecting security of protection operation setting values according to any one of claims 1-4.

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