Method for determining safety distance of complex soil

Abstract

The application provides a method for determining a safe distance of complex soil, which comprises the following steps: obtaining a plurality of historical maximum pipeline potentials and a plurality of historical uniform safe distance values; inputting the plurality of historical maximum pipeline potentials into a complex soil model to obtain a plurality of historical complex safe distance values output by the complex soil model; determining a conversion relationship according to all the historical uniform safe distance values and all the historical complex safe distance values, wherein the conversion relationship is used for representing the relationship between the safe distance of the uniform soil and the safe distance of the complex soil; obtaining a uniform safe distance value, and determining a corresponding complex safe distance value according to the uniform safe distance value and the conversion relationship, wherein the uniform safe distance value is the value of the distance between a buried pipeline and a grounding electrode in the uniform soil under actual working conditions. The accuracy of the safe distance of the complex soil is improved, and thus the problem that the accuracy of the safe distance of the complex soil calculated by the prior art is low is solved.

Description

Technical Field

[0001] This application relates to the field of soil electrode and pre-buried pipeline technology, and more specifically, to a method, apparatus, computer-readable storage medium and electronic device for determining a safe distance in complex soil. Background Technology

[0002] When a high-voltage direct current (HVDC) grounding electrode experiences a fault or undergoes equipment maintenance, it switches to monopolar operation. At this time, thousands of amperes of current flow into the ground, causing potential changes in the nearby soil and creating potential differences between different locations. If a buried pipeline lies within this voltage difference, different sections of the pipeline can absorb, conduct, or release the grounding current from the grounding electrode. Due to the large amount of grounding current, the pipeline's potential relative to ground will shift to varying degrees at different locations along its route. When a HVDC grounding electrode near the pipeline operates in anode mode (i.e., releasing current into the ground), stray currents from the grounding electrode are absorbed by the pipeline in the vicinity, causing a negative shift in the pipeline-to-ground potential. Then, at locations farther from the grounding electrode, the current is discharged back into the ground through the pipeline, resulting in a positive shift in the pipeline-to-ground potential. Conversely, when a HVDC grounding electrode near the pipeline operates in cathode mode (i.e., absorbing current from the ground), stray currents are absorbed by the pipeline in areas far from the grounding electrode, causing a negative shift in the pipeline-to-ground potential. The current is then discharged back into the ground through the pipeline near the grounding electrode, resulting in a positive shift in the pipeline-to-ground potential. High-voltage DC grounding electrodes differ from other DC stray current interferences in that they are characterized by strong interference, large impact range, and difficulty in mitigation. To reduce the interference, one can take measures to move away from them.

[0003] Existing solutions mainly propose different pipeline lengths (such as 30km, 200km, 400km, and 600km) and different anti-corrosion coatings (3PE, petroleum asphalt, and FBE) at 20Ω. m to 15000Ω The safe distance for uniform soil is often specified, but actual grounding electrodes are typically composed of multi-layered, complex soil structures. Current methods propose using the safe distance of the layer with the highest resistivity in the actual soil structure relative to the uniform soil structure as the safe distance for multi-layered, complex soils. However, this method yields a significantly larger safe distance than the actual operating conditions.

[0004] The accuracy of the safety distance calculations for complex soils using existing methods is low. Summary of the Invention

[0005] The main objective of this application is to provide a method, apparatus, computer-readable storage medium, and electronic device for determining the safety distance in complex soil, so as to at least solve the problem of low accuracy in calculating the safety distance in complex soil using existing methods.

[0006] To achieve the above objectives, according to one aspect of this application, a method for determining the safety distance in complex soil is provided. The method includes: acquiring multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values, wherein the historical uniform safety distance corresponds one-to-one with the historical pipeline potential maximum values, the historical pipeline potential maximum values ​​being the maximum potential values ​​of buried pipelines under historical operating conditions, the historical uniform safety distance values ​​being the safety distance values ​​of uniform soil under historical operating conditions, and the uniform soil safety distance being the distance between the buried pipeline located in the uniform soil and the grounding electrode, wherein the uniform soil is a soil structure composed of soils with the same resistivity; inputting the multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model, wherein the historical complex safety distance values ​​are the predicted safety distance values ​​of complex soil under historical operating conditions, and the safety distance of complex soil is the distance between the buried pipeline located in the uniform soil and the grounding electrode. The distance between the buried pipeline and the grounding electrode in complex soil is determined by training the complex soil model using multiple sets of training data. Each set of training data includes the historical maximum pipeline potential and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with different resistivities. A conversion relationship is determined based on all the historical uniform safety distance values ​​and all the historical complex safety distance values. This conversion relationship characterizes the relationship between the safety distance in uniform soil and the safety distance in complex soil. The uniform safety distance value is obtained, and the corresponding complex safety distance value is determined based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode in the uniform soil under actual working conditions, and the complex safety distance value is the distance between the buried pipeline and the grounding electrode in the complex soil under actual working conditions.

[0007] Optionally, inputting multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model includes: establishing an initial numerical simulation calculation model; training the initial numerical simulation calculation model using the multiple sets of training data to obtain the complex soil model; and inputting multiple historical pipeline potential maximum values ​​into the complex soil model to obtain corresponding multiple historical complex safety distance values.

[0008] Optionally, determining the conversion relationship based on all the historical uniform safety distance values ​​and all the historical complex safety distance values ​​includes: fitting all the historical uniform safety distance values ​​and the corresponding historical complex safety distance values ​​to obtain the conversion relationship.

[0009] Optionally, the transformation relationship is obtained by fitting all the historical uniform safety distance values ​​and the corresponding historical complex safety distance values, including:

[0010] By fitting all the historical uniform safety distance values ​​and the corresponding historical complex safety distance values, the transformation relationship including the following fitting expression is obtained:

[0011] ,

[0012] in, , , and All are constants. For conversion factors, The safe distance for the uniform soil.

[0013] Optionally, in the process of determining the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship, the method further includes: determining the target conversion coefficient corresponding to the uniform safety distance value based on the conversion relationship and the uniform safety distance value.

[0014] Optionally, based on the uniform safety distance value and the conversion relationship, the corresponding complex safety distance value is determined, including:

[0015] according to Determine the complex safety distance value, wherein, For the complex security distance value, The target conversion coefficient, This refers to the uniform safety distance value.

[0016] Optionally, after determining the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship, the method further includes: generating early warning information when the complex safety distance value is greater than a preset distance value, wherein the early warning information is used to characterize that the distance between the buried pipeline and the grounding electrode located in the complex soil under actual working conditions is unqualified and the buried pipeline needs to be rearranged.

[0017] According to another aspect of this application, a device for determining the safe distance in complex soil is provided. The device includes an acquisition unit, a first processing unit, a determination unit, and a second processing unit. The acquisition unit is used to acquire multiple historical pipeline potential maximum values ​​and multiple historical uniform safe distance values. The historical uniform safe distance corresponds one-to-one with the historical pipeline potential maximum values. The historical pipeline potential maximum values ​​are the maximum potential values ​​of buried pipelines under historical operating conditions. The historical uniform safe distance values ​​are the safe distance values ​​of uniform soil under historical operating conditions. The safe distance of uniform soil is the distance between the buried pipeline located in the uniform soil and the grounding electrode. The uniform soil is a soil structure composed of soil with the same resistivity. The first processing unit is used to input the multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safe distance values ​​output by the complex soil model. The historical complex safe distance values ​​are the predicted safe distance values ​​of complex soil under historical operating conditions. The distance is defined as the distance between the buried pipeline and the grounding electrode located in the complex soil. The complex soil model is obtained by training multiple sets of training data. Each set of training data includes: the historical maximum pipeline potential and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with different resistivities. The determination unit is used to determine the conversion relationship based on all the historical uniform safety distance values ​​and all the historical complex safety distance values. The conversion relationship is used to characterize the relationship between the safety distance of the uniform soil and the safety distance of the complex soil. The second processing unit is used to obtain the uniform safety distance value and determine the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode located in the uniform soil under actual working conditions. The complex safety distance value is the distance between the buried pipeline and the grounding electrode located in the complex soil under actual working conditions.

[0018] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the methods for determining the safe distance in complex soil.

[0019] According to another aspect of this application, an electronic device is provided, the electronic device including one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including a method for performing a method for determining a safe distance in any of the aforementioned complex soils.

[0020] By applying the technical solution of this application, a conversion relationship is obtained by using the historical maximum pipeline potential as a benchmark and the historical uniform safety distance value and multiple historical complex safety distance values ​​output by the complex soil model. In this way, the corresponding complex safety distance value can be determined according to the uniform safety distance value and the conversion relationship, thereby improving the accuracy of the safety distance for complex soil and solving the problem of low accuracy of the safety distance for complex soil calculated by the existing solution. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 A hardware structure block diagram of a mobile terminal for performing a method for determining a safe distance in complex soil, according to an embodiment of this application, is shown.

[0023] Figure 2 A flowchart illustrating a method for determining a safe distance in complex soil conditions according to an embodiment of this application is shown.

[0024] Figure 3 A schematic diagram of a horizontal double-layered soil is shown;

[0025] Figure 4 A schematic diagram showing the relationship between surface soil thickness and maximum pipeline potential is shown;

[0026] Figure 5 The maximum pipe potential corresponding to uniform soil resistivity is shown.

[0027] Figure 6 A schematic diagram showing the relationship between the resistivity safety distance of complex soil and uniform soil at 1200 Ω·m is presented.

[0028] Figure 7 A schematic diagram showing the relationship between the safety distance for uniform soil and the conversion factor is shown;

[0029] Figure 8 A structural block diagram of a device for determining a safe distance in complex soil conditions, according to an embodiment of this application, is shown. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] As described in the background section, existing solutions mainly address pipelines of different lengths (e.g., 30km, 200km, 400km, and 600km) and pipelines with different anti-corrosion coatings (3PE, petroleum asphalt, and FBE). At 20Ω... m to 15000Ω The safety distance for uniform soil is often determined by the existing method. However, actual grounding electrodes are typically multi-layered and complex soil structures. Existing methods use the safety distance of the layer with the highest resistivity in the actual soil structure relative to the uniform soil structure as the safety distance for multi-layered complex soil. This method yields a safety distance that deviates significantly from actual operating conditions, resulting in a larger safety distance than the actual conditions. Furthermore, the accuracy of the safety distance calculation for complex soil using existing methods is low. To address this issue, embodiments of this application provide a method, apparatus, computer-readable storage medium, and electronic device for determining the safety distance for complex soil.

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a method of determining a safe distance in complex soil conditions, according to an embodiment of the present invention. Figure 1As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0036] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the method for determining the safe distance in complex soil in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0037] This embodiment provides a method for determining a safe distance in complex environments that operate on mobile terminals, computer terminals, or similar computing devices. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0038] Figure 2This is a flowchart illustrating a method for determining a safe distance in complex soil conditions according to an embodiment of this application. Figure 2 As shown, the method includes the following steps:

[0039] Step S201: Obtain multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values. The aforementioned historical uniform safety distance corresponds one-to-one with the aforementioned historical pipeline potential maximum values. The aforementioned historical pipeline potential maximum values ​​are the potential maximum values ​​of buried pipelines under historical operating conditions. The aforementioned historical uniform safety distance values ​​are the safety distance values ​​of uniform soil under historical operating conditions. The aforementioned uniform soil safety distance is the distance between the buried pipeline located in the aforementioned uniform soil and the grounding electrode. The aforementioned uniform soil is a soil structure composed of soil with the same resistivity.

[0040] Specifically, because the historical maximum pipeline potential is used as a benchmark, the accuracy of subsequent calculations of complex safety distance values ​​can be improved. Staff can intuitively understand the potential gradient through the historical maximum pipeline potential, which facilitates the equivalent historical uniform safety distance value.

[0041] Step S202: Input the above-mentioned historical pipeline potential maximum values ​​into the complex soil model to obtain the above-mentioned historical complex safety distance values ​​output by the complex soil model. The above-mentioned historical complex safety distance values ​​are the predicted safety distance values ​​of complex soil under historical working conditions. The above-mentioned safety distance of complex soil is the distance between the buried pipeline and the grounding electrode located in the above-mentioned complex soil. The above-mentioned complex soil model is trained using multiple sets of training data. Each set of training data includes: the above-mentioned historical pipeline potential maximum value and the above-mentioned historical uniform safety distance value. The above-mentioned complex soil is a soil structure composed of soils with different resistivity.

[0042] Step S202 involves inputting multiple historical pipeline potential maximum values ​​into the complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model, including:

[0043] An initial numerical simulation calculation model is established; the initial numerical simulation calculation model is trained using the above-mentioned multiple sets of training data to obtain the above-mentioned complex soil model; the above-mentioned historical pipeline potential maximum values ​​are input into the above-mentioned complex soil model to obtain the corresponding multiple historical complex safety distance values.

[0044] Specifically, the above-mentioned initial numerical simulation calculation model is trained using multiple sets of training data to obtain the above-mentioned complex soil model. Furthermore, by inputting the maximum historical pipeline potential value into the above-mentioned complex soil model, the above-mentioned complex soil model outputs multiple historical complex safety distance values ​​that correspond one-to-one with the above-mentioned maximum historical pipeline potential value, which facilitates the subsequent acquisition of conversion relationships.

[0045] Step S203: Based on all the above-mentioned historical uniform safety distance values ​​and all the above-mentioned historical complex safety distance values, determine the conversion relationship, which is used to characterize the relationship between the safety distance of the above-mentioned uniform soil and the safety distance of the above-mentioned complex soil.

[0046] Based on all the aforementioned historical uniform safety distance values ​​and all the aforementioned historical complex safety distance values, the conversion relationship is determined, including: fitting all the aforementioned historical uniform safety distance values ​​and the corresponding historical complex safety distance values ​​to obtain the aforementioned conversion relationship.

[0047] By fitting all the aforementioned historical uniform safety distance values ​​and their corresponding historical complex safety distance values, the transformation relationship described above, including the following fitting expression, is obtained:

[0048] ,

[0049] in, , , and All are constants. For conversion factors, The safe distance for the above-mentioned uniform soil.

[0050] Step S204: Obtain the uniform safety distance value, and determine the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode located in the uniform soil under actual working conditions, and the complex safety distance value is the distance between the buried pipeline and the grounding electrode located in the complex soil under actual working conditions.

[0051] In step S204, that is, in the process of determining the corresponding complex safety distance value based on the above uniform safety distance value and the above conversion relationship, the above method further includes: determining the target conversion coefficient corresponding to the above uniform safety distance value based on the above conversion relationship and the above uniform safety distance value.

[0052] Specifically, each time a uniform safety distance value is received, it is necessary to substitute the uniform safety distance value into the fitting expression of the transformation relationship to obtain the corresponding target transformation coefficient, so that the target transformation coefficient and the uniform safety distance value can be used to obtain the corresponding complex safety distance value later.

[0053] Step S204: Based on the above uniform safety distance value and the above conversion relationship, determine the corresponding complex safety distance value, including:

[0054] according to Determine the aforementioned complex safety distance values, among which, For the aforementioned complex safety distance values, The conversion coefficients for the above objectives are... The above-mentioned uniform safety distance value.

[0055] Specifically, through This allows for the calculation of complex safety distance values ​​corresponding to uniform safety distance values.

[0056] After step S204, after determining the corresponding complex safety distance value based on the above uniform safety distance value and the above conversion relationship, the above method further includes: generating early warning information when the above complex safety distance value is greater than a preset distance value. The early warning information is used to indicate that the distance between the buried pipeline and the grounding electrode located in the above complex soil is unqualified under actual working conditions, and the buried pipeline needs to be rearranged.

[0057] Specifically, if the distance between the buried pipeline and the grounding electrode in the aforementioned complex soil is not up to standard under actual working conditions, it indicates that the distance between the buried pipeline and the grounding electrode in the aforementioned complex soil is unreasonable and the buried pipeline needs to be rearranged.

[0058] Existing methods for calculating the safe distance for multi-layered complex soils involve using the layer with the highest resistivity and consulting a safe distance chart for homogeneous soils. However, this approach yields an overestimation of the safe distance for complex soils, which does not reflect actual conditions. This application proposes a method that uses the maximum pipeline potential method to equate multi-layered soils to homogeneous soils, establishes a conversion relationship between the safe distances for homogeneous and complex soils, and presents a process for obtaining the safe distance for complex soils using coefficient correction. The resulting safe distance for complex soils is more accurate and closer to actual working conditions.

[0059] Through the above embodiments, by using the historical maximum pipeline potential as a benchmark and the historical uniform safety distance value and multiple historical complex safety distance values ​​output by the above complex soil model, the conversion relationship is obtained. Thus, the corresponding complex safety distance value can be determined based on the above uniform safety distance value and the above conversion relationship, thereby improving the accuracy of the safety distance for complex soil and solving the problem of low accuracy of the safety distance calculated by the existing scheme for complex soil.

[0060] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the method for determining the safe distance in complex soil will be described in detail below with reference to specific embodiments.

[0061] This embodiment relates to a specific method for determining the safety distance in complex soil conditions, such as... Figure 3 As shown, it includes the following steps:

[0062] Step S1: Taking a 600km long 3PE pipeline as an example, with a grounding electrode distance of 5km from the pipeline and a grounding electrode current of 3000A; a two-layer soil structure is set up (e.g., Figure 3 The surface soil resistivity is 100 Ω·m. Changing the surface soil thickness (from 1 km to 30 km), the subsurface soil resistivity is 10000 Ω·m, with an infinite depth. For example... Figure 4 As shown, the maximum pipeline potential corresponding to different surface soil thicknesses is displayed. It can be seen that after the surface soil thickness is greater than 5 km, the maximum pipeline potential tends to stabilize, that is, after the surface soil thickness is greater than 5 km, it is not related to the resistivity of the deep soil.

[0063] Step S2: with Figure 4 Taking the maximum pipe-to-ground potential of 82.7V (within the red circle in the image, at this point, the top 1km of soil) as an example; to determine the uniform soil resistivity corresponding to a maximum pipe-to-ground potential that is close to 82.7V, again using a 600km long 3PE pipeline as an example, with a 5km distance between the grounding electrode and the pipeline, a grounding current of 3000A, and uniform soil resistivity ranging from 500Ω·m to 10000Ω·m, the relationship between the maximum pipeline potential and the soil resistivity is as follows. Figure 5 When the uniform soil resistivity is 1200 Ω·m, the corresponding maximum pipe potential is 83.7 V, which is close to 82.7 V in step S1.

[0064] Step S3: Evaluate the safety distance using the double-layer soil structure from Step S1 (top soil layer 1 km, soil resistivity 100 Ω·m, bottom soil resistivity 10000 Ω·m, thickness infinite) and the uniform soil structure of 1200 Ω·m from Step 2, respectively, with personal safety voltage limits of 35V and 70V. The corresponding safety distances are as follows: Figure 6 As shown;

[0065] Based on a 35V evaluation, the topsoil layer is 1 km (100Ω·m).

[0066] The safe distances from uniform soil with a strength of 1200 Ω·m are 17.8 km and 10.2 km.

[0067] Based on a 70V rating, the safe distances are 6.9km and 5.9km.

[0068] Due to differences in soil structure, although the maximum pipe-to-soil potential is guaranteed to be the same, the attenuation of the pipe-to-soil potential cannot be guaranteed.

[0069] The safety distance needs to be corrected by coefficients through multiple sets of equivalent methods;

[0070] Step S4: Design multiple multi-layered complex soils according to the equivalent ideas of Step S1 and Step S2;

[0071] And according to the maximum pipe-to-ground potential method, the corresponding relationship when the maximum pipe-to-ground potential of multi-layered complex soil and uniform soil is the same is found as shown in Table 1.

[0072] Table 1. Resistivity Comparison Table for Complex and Homogeneous Soils

[0073]

[0074] Step S5: Calculate the safe distances between the five complex soil structures and the homogeneous soil structure from Step S4 according to safety limits of 35V and 70V (safety limits refer to the human body's steady-state DC safe voltage being 70V under dry conditions and 35V under humid conditions or when skin impedance decreases; this can also be understood as the safe voltage that the human body can accept according to this standard), as shown in Table 2; plot the safe distances and conversion factors for homogeneous soil in Table 2, as shown in Table 2. Figure 7 The results show that the conversion factor and the safe distance of uniform soil are related as follows: when the safe distance of uniform soil is less than 8km, the conversion factor can be taken as 0.85; when the safe distance of uniform soil is greater than 8km, the conversion factor and the safe distance of uniform soil satisfy the following expression. Therefore, for the safe distance of complex soil in the future, the complex soil can be converted into uniform soil, and the safe distance of uniform soil can be queried to obtain the safe distance of complex soil.

[0075] expression ,

[0076] in, , , and All are constants. For conversion factors, The safe distance for the above-mentioned uniform soil, It is 0.85. It is 1.019. It is 0.25. It is 8.

[0077] Table 2. Safety Distances and Conversion Factors for Complex and Homogeneous Soils

[0078]

[0079] The complex soil was equivalent to uniform soil using the pipe potential maximum value method. The complex soil was converted to uniform soil using the conversion factor method, and the safe distance of the complex soil was obtained by referring to the safe distance chart of uniform soil. The complex soil and uniform soil were equivalent using the pipe-to-ground potential maximum value method. The safe distance of the complex soil was obtained by referring to the safe distance chart of uniform soil using the conversion factor method.

[0080] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0081] This application also provides a device for determining the safety distance in complex soil. It should be noted that this device can be used to execute the method for determining the safety distance in complex soil provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0082] The following describes the device for determining the safe distance in complex soil conditions provided in the embodiments of this application.

[0083] Figure 8 This is a structural block diagram of a device for determining a safe distance in complex soil conditions, provided according to an embodiment of this application. Figure 8As shown, the device includes an acquisition unit 81, a first processing unit 82, a determination unit 83, and a second processing unit 84. The acquisition unit 81 acquires multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values. The historical uniform safety distance corresponds one-to-one with the historical pipeline potential maximum values. The historical pipeline potential maximum value is the maximum potential value of the buried pipeline under historical operating conditions. The historical uniform safety distance value is the safety distance value of uniform soil under historical operating conditions. The uniform soil safety distance is the distance between the buried pipeline located in the uniform soil and the grounding electrode. The uniform soil is a soil structure composed of soil with the same resistivity. The first processing unit 82 inputs the multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model. The historical complex safety distance value is the predicted safety distance value of complex soil under historical operating conditions. The safety distance of complex soil is the distance between the buried pipeline located in the complex soil. The distance between the buried pipeline and the grounding electrode mentioned above, and the complex soil model mentioned above are obtained by training multiple sets of training data. Each set of training data includes: the maximum historical pipeline potential and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with different resistivity. The determination unit 83 is used to determine the conversion relationship based on all the historical uniform safety distance values ​​and all the historical complex safety distance values. The conversion relationship is used to characterize the relationship between the safety distance of the uniform soil and the safety distance of the complex soil. The second processing unit 84 is used to obtain the uniform safety distance value and determine the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode located in the uniform soil under actual working conditions. The complex safety distance value is the distance between the buried pipeline and the grounding electrode located in the complex soil under actual working conditions.

[0084] In the aforementioned device, a conversion relationship is obtained by using the historical maximum pipeline potential as a benchmark and the historical uniform safety distance value and multiple historical complex safety distance values ​​output by the aforementioned complex soil model. This allows the determination of the corresponding complex safety distance value based on the aforementioned uniform safety distance value and the aforementioned conversion relationship, thereby improving the accuracy of the safety distance for complex soil and solving the problem of low accuracy in calculating the safety distance for complex soil in existing schemes.

[0085] In one embodiment of this application, the first processing unit includes a first processing module, a second processing module, and a third processing module. The first processing module is used to establish an initial numerical simulation calculation model; the second processing module is used to train the initial numerical simulation calculation model using the multiple sets of training data to obtain the complex soil model; and the third processing module is used to input the multiple historical pipeline potential maximum values ​​into the complex soil model to obtain the corresponding multiple historical complex safety distance values.

[0086] In one embodiment of this application, the determining unit includes a determining module, which is used to fit all the above-mentioned historical uniform safety distance values ​​and all the corresponding above-mentioned historical complex safety distance values ​​to obtain the above-mentioned conversion relationship.

[0087] In one embodiment of this application, the determining module includes a determining submodule;

[0088] The determination submodule is used to fit all the aforementioned historical uniform safety distance values ​​and their corresponding historical complex safety distance values ​​to obtain the aforementioned transformation relationship, which includes the following fitting expression:

[0089] expression ,

[0090] in, , , and All are constants. For conversion factors, The safe distance for the above-mentioned uniform soil.

[0091] In one embodiment of this application, the second processing unit includes a fourth processing module. In the process of determining the corresponding complex safety distance value based on the above-mentioned uniform safety distance value and the above-mentioned conversion relationship, the fourth processing module is used to determine the target conversion coefficient corresponding to the above-mentioned uniform safety distance value based on the above-mentioned conversion relationship and the above-mentioned uniform safety distance value.

[0092] In one embodiment of this application, the second processing unit includes a fifth processing module;

[0093] The fifth processing module is used to... Determine the aforementioned complex safety distance values, among which, For the aforementioned complex safety distance values, The conversion coefficients for the above objectives are... The above-mentioned uniform safety distance value.

[0094] In one embodiment of this application, the device further includes a third processing unit; after determining the corresponding complex safety distance value based on the above-mentioned uniform safety distance value and the above-mentioned conversion relationship, the third processing unit is used to generate early warning information when the above-mentioned complex safety distance value is greater than a preset distance value. The early warning information is used to characterize that the distance between the buried pipeline and the grounding electrode located in the above-mentioned complex soil is unqualified under actual working conditions, and the buried pipeline needs to be rearranged.

[0095] The aforementioned device for determining the safe distance in complex soil conditions includes a processor and a memory. The acquisition unit, first processing unit, determination unit, and second processing unit are all stored as program units in the memory. The processor executes these program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; alternatively, the modules may be located in different processors in any combination.

[0096] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and adjusting kernel parameters can address the low accuracy of existing methods in calculating safe distances for complex soil conditions.

[0097] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0098] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the method for determining the safe distance in complex soil.

[0099] This invention provides a processor for running a program, wherein the program executes the method for determining the safe distance in complex soil conditions.

[0100] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps: acquiring multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values, wherein the historical uniform safety distance corresponds one-to-one with the historical pipeline potential maximum values, the historical pipeline potential maximum values ​​are the maximum potential values ​​of buried pipelines under historical operating conditions, the historical uniform safety distance values ​​are the safety distance values ​​of uniform soil under historical operating conditions, the uniform soil safety distance is the distance between the buried pipeline located in the uniform soil and the grounding electrode, and the uniform soil is a soil structure composed of soil with the same resistivity; inputting the multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model, wherein the historical complex safety distance values ​​are the predicted safety distance values ​​of complex soil under historical operating conditions, and the safety distance of the complex soil is... The total distance refers to the distance between the buried pipeline and the grounding electrode located in the aforementioned complex soil. The complex soil model was trained using multiple sets of training data. Each set of training data includes the historical maximum pipeline potential and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with varying resistivity. A conversion relationship is determined based on all the historical uniform safety distance values ​​and all the historical complex safety distance values. This conversion relationship characterizes the relationship between the safety distance in uniform soil and the safety distance in complex soil. The uniform safety distance value is obtained, and the corresponding complex safety distance value is determined based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode located in the aforementioned uniform soil under actual operating conditions, and the complex safety distance value is the distance between the buried pipeline and the grounding electrode located in the aforementioned complex soil under actual operating conditions. The devices mentioned in this paper can be servers, PCs, tablets, mobile phones, etc.

[0101] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps: obtaining multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values, wherein the historical uniform safety distance corresponds one-to-one with the historical pipeline potential maximum values, the historical pipeline potential maximum values ​​are the potential maximum values ​​of buried pipelines under historical operating conditions, the historical uniform safety distance values ​​are the safety distance values ​​of uniform soil under historical operating conditions, the uniform soil safety distance is the distance between the buried pipeline located in the uniform soil and the grounding electrode, and the uniform soil is a soil structure composed of soil with the same resistivity; inputting the multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model, wherein the historical complex safety distance values ​​are the predicted safety distance values ​​of complex soil under historical operating conditions, and the complex soil safety distance is the distance between the buried pipeline located in the uniform soil and the grounding electrode. The distance between the buried pipeline and the grounding electrode in the complex soil is described. The complex soil model is trained using multiple sets of training data. Each set of training data includes the historical maximum pipeline potential and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with different resistivities. Based on all the historical uniform safety distance values ​​and all the historical complex safety distance values, a conversion relationship is determined. This conversion relationship is used to characterize the relationship between the safety distance in the uniform soil and the safety distance in the complex soil. The uniform safety distance value is obtained, and based on the uniform safety distance value and the conversion relationship, the corresponding complex safety distance value is determined. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode in the uniform soil under actual working conditions, and the complex safety distance value is the distance between the buried pipeline and the grounding electrode in the complex soil under actual working conditions. By using the historical maximum pipeline potential as a benchmark, and combining the historical uniform safety distance value with multiple historical complex safety distance values ​​output by the aforementioned complex soil model, a conversion relationship is obtained. This allows the determination of the corresponding complex safety distance value based on the aforementioned uniform safety distance value and the aforementioned conversion relationship, thereby improving the accuracy of the safety distance calculation for complex soil and solving the problem of low accuracy in calculating the safety distance for complex soil using existing schemes.

[0102] This application also provides an electronic device including one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors. The one or more programs include methods for performing any of the aforementioned methods for determining the safety distance in complex soil conditions. By using the historical maximum pipeline potential as a reference and combining historical uniform safety distance values ​​with multiple historical complex safety distance values ​​output by the aforementioned complex soil model, a conversion relationship is obtained. This allows the determination of the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship, improving the accuracy of the safety distance calculation for complex soil conditions and thus solving the problem of low accuracy in calculating the safety distance for complex soil conditions using existing methods.

[0103] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0104] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0106] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0107] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0108] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0109] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0110] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0111] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0112] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0113] 1) The method for determining the safety distance of complex soil in this application uses the historical maximum pipeline potential as a benchmark and the historical uniform safety distance value and multiple historical complex safety distance values ​​output by the complex soil model to obtain the conversion relationship. Thus, the corresponding complex safety distance value can be determined based on the uniform safety distance value and the conversion relationship, which improves the accuracy of the safety distance of complex soil and solves the problem of low accuracy of the safety distance of complex soil calculated by the existing scheme.

[0114] 2) The device for determining the safe distance in complex soil of this application obtains a conversion relationship by using the historical maximum pipeline potential as a benchmark and using the historical uniform safe distance value and multiple historical complex safe distance values ​​output by the complex soil model. Thus, the corresponding complex safe distance value can be determined based on the uniform safe distance value and the conversion relationship, thereby improving the accuracy of the safe distance in complex soil and solving the problem of low accuracy of the safe distance in complex soil calculated by the existing scheme.

[0115] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for determining a safe distance in complex soil conditions, characterized in that, include: Multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values ​​are obtained. The historical uniform safety distance corresponds one-to-one with the historical pipeline potential maximum value. The historical pipeline potential maximum value is the potential maximum value of the buried pipeline under historical operating conditions. The historical uniform safety distance value is the safety distance value of uniform soil under historical operating conditions. The uniform soil safety distance is the distance between the buried pipeline located in the uniform soil and the grounding electrode. The uniform soil is a soil structure composed of soil with the same resistivity. Multiple historical pipeline potential maximum values ​​are input into the complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model. The historical complex safety distance value is the predicted safety distance of complex soil under historical working conditions. The safety distance of complex soil is the distance between the buried pipeline and the grounding electrode located in the complex soil. The complex soil model is trained using multiple sets of training data. Each set of training data includes: the historical pipeline potential maximum value and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with different resistivities. Based on all the historical uniform safety distance values ​​and all the historical complex safety distance values, a conversion relationship is determined, which is used to characterize the relationship between the safety distance of the uniform soil and the safety distance of the complex soil. Obtain a uniform safety distance value, and determine the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode located in the uniform soil under actual working conditions, and the complex safety distance value is the distance between the buried pipeline and the grounding electrode located in the complex soil under actual working conditions.

2. The method according to claim 1, characterized in that, By inputting multiple historical pipeline potential maximum values ​​into a complex soil model, multiple historical complex safety distance values ​​output by the complex soil model are obtained, including: Establish an initial numerical simulation calculation model; The initial numerical simulation model is trained using the multiple sets of training data to obtain the complex soil model. By inputting the maximum values ​​of the historical pipeline potentials into the complex soil model, the corresponding historical complex safety distance values ​​are obtained.

3. The method according to claim 1, characterized in that, Based on all the historical uniform safety distance values ​​and all the historical complex safety distance values, the transformation relationship is determined, including: The transformation relationship is obtained by fitting all the historical uniform safety distance values ​​and the corresponding historical complex safety distance values.

4. The method according to claim 3, characterized in that, The transformation relationship is obtained by fitting all the historical uniform safety distance values ​​and the corresponding historical complex safety distance values, including: By fitting all the historical uniform safety distance values ​​and the corresponding historical complex safety distance values, the transformation relationship including the following fitting expression is obtained: ， in, , , and All are constants. For conversion factors, The safe distance for the uniform soil.

5. The method according to claim 1, characterized in that, In determining the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship, the method further includes: Based on the transformation relationship and the uniform safety distance value, determine the target transformation coefficient corresponding to the uniform safety distance value.

6. The method according to claim 5, characterized in that, Based on the uniform safety distance value and the transformation relationship, the corresponding complex safety distance value is determined, including: according to Determine the complex safety distance value, wherein, For the complex security distance value, The target conversion coefficient, This refers to the uniform safety distance value.

7. The method according to claim 1, characterized in that, After determining the corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship, the method further includes: If the complex safety distance value is greater than the preset distance value, an early warning message is generated. The early warning message is used to indicate that the distance between the buried pipeline and the grounding electrode located in the complex soil is unqualified under actual working conditions, and the buried pipeline needs to be rearranged.

8. A device for determining a safe distance in complex soil conditions, characterized in that, include: The acquisition unit is used to acquire multiple historical pipeline potential maximum values ​​and multiple historical uniform safety distance values. The historical uniform safety distance corresponds one-to-one with the historical pipeline potential maximum values. The historical pipeline potential maximum value is the potential maximum value of the buried pipeline under historical operating conditions. The historical uniform safety distance value is the safety distance value of uniform soil under historical operating conditions. The safety distance of uniform soil is the distance between the buried pipeline located in the uniform soil and the grounding electrode. The uniform soil is a soil structure composed of soil with the same resistivity. The first processing unit is used to input multiple historical pipeline potential maximum values ​​into a complex soil model to obtain multiple historical complex safety distance values ​​output by the complex soil model. The historical complex safety distance value is the predicted safety distance of complex soil under historical working conditions. The safety distance of complex soil is the distance between the buried pipeline and the grounding electrode located in the complex soil. The complex soil model is trained using multiple sets of training data. Each set of training data includes: the historical pipeline potential maximum value and the historical uniform safety distance value. The complex soil is a soil structure composed of soils with different resistivities. The determining unit is used to determine a transformation relationship based on all the historical uniform safety distance values ​​and all the historical complex safety distance values, wherein the transformation relationship is used to characterize the relationship between the safety distance of the uniform soil and the safety distance of the complex soil; The second processing unit is used to obtain a uniform safety distance value and determine a corresponding complex safety distance value based on the uniform safety distance value and the conversion relationship. The uniform safety distance value is the distance between the buried pipeline and the grounding electrode located in the uniform soil under actual working conditions, and the complex safety distance value is the distance between the buried pipeline and the grounding electrode located in the complex soil under actual working conditions.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the method for determining the safe distance in complex soil as described in any one of claims 1 to 7.

10. An electronic device, characterized in that, include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including a method for performing a method for determining a safe distance in complex soil as described in any one of claims 1 to 7.

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