Method and device for predicting alternating current interference in pipe jacking section

Abstract

The application provides a method and device for predicting AC interference of a pipe jacking section. The method comprises: obtaining longitudinal induced electromotive force monitoring information or ground electric field potential of a target pipe jacking section in parallel, oblique intersection and vertical cases of the pipe jacking section and a power transmission line, obtaining longitudinal electric field strength according to the longitudinal induced electromotive force monitoring information, obtaining voltage peaks at both ends of the target pipe jacking section through AC interference monitoring information at both ends of the target pipe jacking section, and calculating maximum AC interference voltage according to the longitudinal electric field strength, the maximum ground electric field potential and the voltage peaks at both ends. The method of the application calculates the longitudinal electric field strength of the target pipe jacking section to obtain the maximum AC interference voltage, thereby solving the problem that the AC interference of the pipe jacking section is difficult to measure.

Description

Technical Field

[0001] This application relates to the field of pipeline AC interference assessment, and in particular to a method and equipment for predicting AC interference in pipe jacking crossing sections. Background Technology

[0002] Pipe jacking technology is a trenchless construction technique for laying pipelines underground. It is mainly used for oil and gas pipelines to cross obstacles such as large rivers, highways, railways, and buildings. Since high-speed rail and AC power transmission lines can cause AC interference to the pipelines during construction, evaluating the AC interference of the pipelines is of great significance for ensuring the stable operation of the oil and gas pipeline protection system.

[0003] Currently, AC interference assessment for pipelines is conducted by testing the AC interference voltage and current density on the pipeline. However, the area above the pipe jacking system is difficult to access, making it challenging to detect AC interference by testing the AC interference voltage and current density on the pipeline itself. For pipe jacking inspection, existing methods typically only perform qualitative testing to determine if the pipe jacking system can operate normally.

[0004] However, qualitative testing is difficult to measure the AC interference in the pipe jacking crossing section, and the specific AC interference situation in the pipe jacking crossing section is not clear. Summary of the Invention

[0005] This application provides a method and equipment for predicting AC interference in pipe jacking crossing sections, in order to solve the problem that AC interference in pipe jacking crossing sections is difficult to measure.

[0006] Firstly, this application provides a method for predicting AC interference in pipe jacking crossing sections, including:

[0007] Obtain the longitudinal electric field intensity of the target pipe jacking;

[0008] Acquire AC interference monitoring information at both ends of the target pipe jacking, including the voltage at both ends of the target pipe jacking.

[0009] Calculate the maximum AC interference voltage of the target pipe based on the longitudinal electric field strength and the voltage at both ends.

[0010] Optionally, the pipe jacking section is parallel to the transmission line. The longitudinal electric field intensity is marked as the first longitudinal electric field intensity. The first longitudinal electric field intensity of the target pipe jacking is obtained, specifically including:

[0011] The monitoring information of the first longitudinal induced electromotive force within the range of the two ends of the target jacking pipe is obtained, and the maximum value is determined as the first longitudinal electric field strength based on the monitoring information of the first longitudinal induced electromotive force.

[0012] Optionally, the monitoring information of the first longitudinal induced electromotive force within the range of the two endpoints of the target pipe is obtained, specifically including:

[0013] Acquire monitoring information of the first longitudinal induced electromotive force at the starting point of the target pipe jacking and within a threshold length range from the starting point; or

[0014] Acquire the first longitudinal induced electromotive force monitoring information at the end of the target jacking pipe and within the threshold length range from the end.

[0015] Optionally, based on the first longitudinal electric field strength and the voltage at both ends of the target jacking pipe, the first maximum AC interference voltage of the target jacking pipe is calculated, specifically including:

[0016] The first maximum AC interference voltage of the target pipe jacking is calculated according to the first formula, where the first formula is:

[0017] V dmax1 ≤V ter +E1L

[0018] Among them, V dmax1 V is the first maximum AC interference voltage of the target jacking pipe. ter E1 is the peak voltage at both ends of the target jacking pipe, and L is the maximum voltage at both ends of the target jacking pipe.

[0019] Optionally, the pipe jacking section crosses the transmission line at an angle, and the longitudinal electric field intensity is marked as the second longitudinal electric field intensity. The second longitudinal electric field intensity of the target pipe jacking is obtained, specifically including:

[0020] Obtain the vertical distances from both ends of the target pipe jacking section to the railway track, and determine the parallel spacing based on the vertical distances;

[0021] Obtain the estimated leakage impedance of the rail, and determine the second longitudinal electric field intensity of the target jacking pipe by referring to a table based on the estimated leakage impedance and parallel spacing.

[0022] Optionally, based on the second longitudinal electric field strength of the target jacking pipe and the voltage at both ends, the second maximum AC interference voltage of the target jacking pipe is calculated, specifically including:

[0023] The second maximum AC interference voltage of the target pipe jacking is calculated according to the second formula, where the second formula is:

[0024]

[0025] Among them, V dmax2 The second maximum AC interference voltage of the target jacking pipe, V terE2 is the peak voltage at both ends of the target jacking pipe, which is the maximum voltage at both ends of the target jacking pipe. L is the length of the target jacking pipe, and I is the maximum current in a single autotransformer section when the rail is running normally.

[0026] Optionally, the pipe jacking section is perpendicular to the transmission line, and the method also includes:

[0027] Obtain the ground electric field potential relative to the ground within the range of the starting and ending points of the target pipe jacking, and determine the maximum value of the ground electric field potential based on the ground electric field potential.

[0028] Optionally, the third maximum AC interference voltage of the target pipe is calculated based on the maximum ground electric field potential of the target pipe and the voltage at both ends.

[0029] Calculate the third maximum AC interference voltage of the target pipe jacking, specifically including:

[0030] The third maximum AC interference voltage of the target pipe jacking is calculated according to the third formula, where the third formula is:

[0031] V dmax3 =V 顶 +V ter

[0032] Among them, V dmax3 The third maximum AC interference voltage of the target jacking pipe, V 顶 V represents the maximum electric field potential of the target pipe jacking site. ter The peak voltage at the beginning and end of the target jacking pipe is the maximum voltage at the beginning and end of the target jacking pipe.

[0033] In a second aspect, this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0034] The memory stores instructions that the computer executes;

[0035] The processor executes computer-executable instructions stored in memory to implement the methods described in the first aspect above.

[0036] Thirdly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method described in the first aspect above.

[0037] This application provides a method and device for predicting AC interference in a pipe jacking crossing section. When the target pipe jacking is parallel, obliquely intersecting, or perpendicular to the transmission line, the method monitors the longitudinal induced electromotive force (EMF) or ground electric field potential of the target pipe jacking. Based on the longitudinal induced EMF monitoring information, the longitudinal electric field strength is determined, and based on the ground electric field potential, the maximum value of the ground electric field potential is determined. AC interference monitoring information is also obtained at both ends of the target pipe jacking. The voltage at both ends of the target pipe jacking is obtained based on the AC interference monitoring information. The maximum AC interference voltage of the target pipe jacking at different locations is calculated based on the longitudinal electric field strength, the maximum value of the ground electric field potential, and the voltage at both ends. By obtaining the longitudinal induced EMF monitoring information, the maximum AC interference voltage of the pipe jacking crossing section is obtained, thereby enabling the measurement and prediction of interference in the target pipe jacking crossing section. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0039] Figure 1 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, provided as an embodiment of this application;

[0040] Figure 2 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, provided as an embodiment of this application;

[0041] Figure 3 This is a schematic diagram illustrating the acquisition of longitudinal induced electromotive force monitoring information provided in an embodiment of this application.

[0042] Figure 4 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, provided as an embodiment of this application;

[0043] Figure 5 A schematic diagram illustrating how to obtain the vertical distances from both ends of a target pipe jacking section to the railway track, provided as an embodiment of this application;

[0044] Figure 6 A schematic diagram illustrating the influence of rail leakage impedance on the second longitudinal electric field strength, provided in an embodiment of this application;

[0045] Figure 7 A schematic diagram illustrating the influence of parallel track spacing on the intensity of a second longitudinal electric field, provided in an embodiment of this application;

[0046] Figure 8 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, provided as an embodiment of this application;

[0047] Figure 9A schematic diagram of a device for predicting AC interference in a pipe jacking crossing section provided in an embodiment of this application;

[0048] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0049] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0050] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0051] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation portals are provided for users to choose to authorize or refuse.

[0052] When using pipe jacking technology, the pipe jacking section may be close to facilities such as electrified railways. With the increasing construction of electrified traction systems or high-voltage transmission lines, the pipe jacking section is highly susceptible to AC interference, which is called AC interference of the pipe jacking section.

[0053] Figure 1 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, as provided in this application embodiment, is shown below. Figure 1 As shown, it includes the following steps:

[0054] S101. Obtain the longitudinal electric field intensity of the target jacking pipe.

[0055] More specifically, the longitudinal electric field strength of the target pipe is obtained, wherein the longitudinal electric field strength is obtained based on the longitudinal induced electromotive force monitoring information.

[0056] S102. Obtain AC interference monitoring information at both ends of the target pipe jacking.

[0057] More specifically, AC interference monitoring information is obtained at both ends of the target pipe jacking system, including the voltage at both ends. AC interference is the phenomenon of AC voltage and current generated by the coupling between the AC power transmission system and the AC traction system on the pipeline.

[0058] S103. Calculate the maximum AC interference voltage of the target jacking pipe based on the longitudinal electric field strength and the voltage at both ends.

[0059] More specifically, the maximum AC interference voltage of the target jacking pipe is calculated based on the longitudinal electric field strength of the target jacking pipe and the voltage obtained from the AC interference monitoring information at both ends of the target jacking pipe.

[0060] In the AC interference prediction method of the pipe jacking crossing section provided in the embodiments of this application, the longitudinal induced electromotive force monitoring information of the two ends of the target pipe is obtained, the longitudinal electric field strength of the target pipe is obtained based on the longitudinal induced electromotive force monitoring information, and after obtaining the voltage at the beginning and end of the target pipe, the maximum AC interference voltage is calculated based on the longitudinal electric field strength of the target pipe and the voltage at the beginning and end, and then the AC interference situation of the pipe jacking crossing section is measured by the maximum AC interference voltage, thereby solving the problem of difficulty in measuring the AC interference of the crossing section inside the pipe jacking.

[0061] Figure 2 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, as provided in this application embodiment, is shown below. Figure 2 As shown, when the pipe jacking section is parallel to the transmission line, the following steps are included:

[0062] S201. Obtain the monitoring information of the first longitudinal induced electromotive force within the range of the two endpoints of the target jacking pipe.

[0063] More specifically, the monitoring information of the first longitudinal induced electromotive force within the range of the two endpoints of the target pipe is obtained. This monitoring information includes the monitoring information of the first longitudinal induced electromotive force within a threshold length range from the starting end of the target pipe to the starting end, or the monitoring information of the first longitudinal induced electromotive force within a threshold length range from the end of the target pipe to the end. The threshold length is fifty meters.

[0064] For example: Figure 3 This is a schematic diagram illustrating the acquisition of longitudinal induced electromotive force monitoring information provided in an embodiment of this application, such as... Figure 3 As shown, when current flows through the contact wire, an alternating magnetic field is generated around the contact wire, with electric field lines I1 and magnetic field lines... All of these are jacked pipes laid parallel to it. Within this alternating magnetic field, the jacked pipes will induce an electromotive force E. 旋Because the electromotive force generated on the contact wire is distributed along the axial direction of the contact wire, it is called longitudinal induced electromotive force. The contact wire is a special type of power transmission line that supplies power to electric locomotives and is erected above the railway line.

[0065] S202. The maximum value is determined as the first longitudinal electric field strength based on the monitoring information of the first longitudinal induced electromotive force.

[0066] More specifically, based on the monitoring information of the first longitudinal induced electromotive force, the maximum value of the monitoring information of the first longitudinal induced electromotive force is determined as the first longitudinal electric field strength. The monitoring information of the first longitudinal induced electromotive force consists of multiple values, and the maximum value is selected from these values ​​as the first longitudinal electric field strength.

[0067] S203. Obtain AC interference monitoring information at both ends of the target pipe jacking, and obtain the peak voltage at both ends of the target pipe jacking based on the AC interference monitoring information.

[0068] More specifically, the length of the target jacking pipe is obtained, and AC interference monitoring information is measured within the range of the beginning and end of the target jacking pipe. The AC interference monitoring information includes the voltage value within the range of the beginning and end of the target jacking pipe, and the maximum voltage value is taken as the peak voltage value of the beginning and end of the target jacking pipe.

[0069] S204. Calculate the first maximum AC interference voltage based on the first longitudinal electric field strength and the peak voltage at both ends.

[0070] More specifically, the first maximum AC interference voltage of the target pipe is calculated based on the first longitudinal electric field strength, the peak voltage at both ends, and the first formula, whereby:

[0071] V dmax1 ≤V ter +E1L

[0072] Among them, V dmax1 The first maximum AC interference voltage of the target jacking pipe, V ter Let E1 be the peak voltage at both ends of the target jacking pipe, and L be the length of the target jacking pipe. The calculated maximum AC interference voltage value of the target jacking pipe crossing section is the maximum value without loss; the actual maximum AC interference voltage value of the jacking pipe crossing section is not greater than this maximum value without loss.

[0073] In the AC interference prediction method for the pipe jacking crossing section provided in this application embodiment, when the target pipe jacking crossing section is parallel to the transmission line, the method acquires the monitoring information of the first longitudinal induced electromotive force within a threshold length range of 50 meters from the beginning and end of the target pipe jacking section. The maximum value of the first longitudinal induced electromotive force monitoring information is taken as the first longitudinal electric field strength. The peak voltage of the beginning and end of the target pipe jacking section is obtained by acquiring the AC interference monitoring information of the beginning and end of the target pipe jacking section. Then, the first maximum AC interference voltage is calculated based on the first longitudinal electric field strength and the peak voltage of the beginning and end of the pipe jacking section. By calculating the monitoring information of the first longitudinal induced electromotive force within a certain threshold length range of the target pipe jacking section, the first maximum AC interference voltage of the pipe jacking crossing section is obtained, which solves the problem that it is difficult to measure the maximum AC interference voltage of the pipe jacking crossing section when the target pipe jacking crossing section is parallel to the transmission line.

[0074] Figure 4 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, as provided in this application embodiment, is shown below. Figure 4 As shown, when the pipe jacking section crosses the transmission line at an angle, the following steps are included:

[0075] S401. Obtain the vertical distance between the two ends of the target pipe jacking section and the railway track.

[0076] More specifically, the vertical distance from one end of the target pipe jacking section to the railway track is obtained, and the vertical distance from the other end of the target pipe jacking section to the railway track is also obtained. These vertical distances are predefined parameters.

[0077] For example: Figure 5 This application provides a schematic diagram illustrating the method for obtaining the vertical distances from both ends of a target pipe jacking section to the railway track, as shown in the embodiment of this application. Figure 5 As shown, a A a is the vertical distance from one end of the pipe jacking section to the railway track. B This is the vertical distance from the other end of the pipe jacking section to the railway track.

[0078] S402. Determine the parallel spacing between the target pipe jacking and the railway track based on the vertical distance.

[0079] More specifically, the parallel spacing 'a' between the target jacking pipe and the railway track is calculated based on the vertical distances from one end of the jacking pipe crossing section to the railway track and the vertical distances from the other end of the jacking pipe crossing section to the railway track. The calculation formula is as follows:

[0080] S403. Determine the second longitudinal electric field intensity of the target jacking pipe based on the parallel spacing and actual information.

[0081] More specifically, the second longitudinal electric field strength of the target pipe jacking is determined based on the parallel spacing and actual information, including the estimated leakage impedance of the rails. The second longitudinal electric field strength of the target pipe jacking is obtained by referring to a chart based on the parallel spacing and the estimated leakage impedance.

[0082] Figure 6 A schematic diagram illustrating the influence of rail leakage impedance on the second longitudinal electric field strength, provided in an embodiment of this application, is shown below. Figure 6 As shown, when the target jacking pipe position and parallel spacing are fixed, the second longitudinal electric field strength of the target jacking pipe gradually decreases as the leakage impedance increases.

[0083] Figure 7 This is a schematic diagram illustrating the influence of parallel track spacing on the second longitudinal electric field strength, provided as an embodiment of this application. Figure 7 As shown, with a leakage impedance of 15Ω / km and a fixed target jacking position, the second longitudinal electric field strength of the target jacking gradually decreases as the parallel spacing between the target jacking and the rail increases.

[0084] S404. Obtain AC interference monitoring information at both ends of the target jacking pipe, and obtain the peak voltage at both ends of the target jacking pipe based on the AC interference monitoring information.

[0085] More specifically, AC interference monitoring information is obtained at both ends of the target jacking pipe. The AC interference monitoring information includes the voltage at both ends of the target jacking pipe, and the maximum value is selected from the voltage at both ends of the target jacking pipe as the peak voltage at both ends of the target jacking pipe.

[0086] S405. Calculate the second maximum AC interference voltage based on the second longitudinal electric field strength and the peak voltage at both ends.

[0087] More specifically, the second maximum AC interference voltage of the target pipe is calculated based on the second longitudinal electric field strength, the peak voltage at both ends, and the second formula, whereby the second formula is:

[0088]

[0089] Among them, V dmax2 The second maximum AC interference voltage of the target jacking pipe, V ter E2 is the peak voltage at both ends of the target jacking pipe, which is the maximum voltage at both ends of the target jacking pipe. L is the length of the target jacking pipe, and I is the maximum current in a single autotransformer section when the rail is running normally.

[0090] In the AC interference prediction method for pipe jacking crossing sections provided in this application embodiment, when the target pipe jacking crossing section and the transmission line cross obliquely, the vertical distances from both ends of the target pipe jacking crossing section to the rail are obtained, and the parallel spacing between the target pipe jacking section and the rail is calculated based on the vertical distances from both ends to the rail. The second longitudinal electric field strength of the target pipe jacking section is obtained by looking up a chart based on the parallel spacing and the estimated leakage impedance. The peak voltage at both ends of the target pipe jacking section is obtained based on the AC interference monitoring information at both ends of the target pipe jacking section. Then, the second maximum AC interference voltage is calculated based on the second longitudinal electric field strength and the peak voltage. This solves the problem that it is difficult to measure the maximum AC interference voltage of the pipe jacking crossing section when the target pipe jacking crossing section and the transmission line cross obliquely.

[0091] Figure 8 A flowchart illustrating a method for predicting AC interference in a pipe jacking crossing section, as provided in this application embodiment, is shown below. Figure 8 As shown, when the pipe jacking section is perpendicular to the transmission line, the following steps are included:

[0092] S801. Obtain the ground electric field potential relative to the ground within the range of the starting and ending points of the target pipe jacking, and determine the maximum value as the maximum value of the ground electric field potential based on the ground electric field potential.

[0093] More specifically, during the operation of the monitoring locomotive, the ground electric potential of the target pipe jacking section relative to the ground is monitored, and the maximum value of the ground electric potential relative to the ground is taken as the maximum value of the ground electric potential.

[0094] S802. Obtain AC interference monitoring information at both ends of the target jacking pipe, and obtain the peak voltage at both ends of the target jacking pipe based on the AC interference monitoring information.

[0095] More specifically, AC interference monitoring information is obtained at both ends of the target pipe jacking, including the voltage at both ends of the target pipe jacking. The maximum value of the voltage at both ends of the target pipe jacking is selected as the peak voltage at both ends of the target pipe jacking.

[0096] S803. Calculate the third maximum AC interference voltage based on the maximum value of the ground electric field potential and the peak voltage at both ends.

[0097] More specifically, the third maximum AC interference voltage of the target pipe jacking is calculated based on the maximum value of the ground electric field potential, the peak voltage at both ends, and the third formula, whereby:

[0098] V dmax3 =V 顶 +V ter

[0099] Among them, V dmax3 The third maximum AC interference voltage of the target jacking pipe, V 顶 V represents the maximum value of the ground electric field potential for the target pipe jacking project.ter The peak voltage at the beginning and end of the target jacking pipe is the maximum voltage at the beginning and end of the target jacking pipe.

[0100] In the AC interference prediction method for the pipe jacking crossing section provided in this application embodiment, when the target pipe jacking crossing section is perpendicular to the transmission line, the ground electric field potential relative to the ground within the range of the beginning and end of the target pipe jacking is monitored. The maximum value of the ground electric field potential is determined based on the maximum value of the ground electric field potential. The peak voltage at the beginning and end of the target pipe jacking is obtained based on the AC interference monitoring information at the beginning and end of the target pipe jacking. Thus, the third maximum AC interference voltage of the target pipe jacking is calculated based on the maximum value of the ground electric field potential and the peak voltage at the beginning and end of the target pipe jacking. This solves the problem that it is difficult to measure the maximum AC interference voltage of the pipe jacking crossing section when the target pipe jacking crossing section is perpendicular to the transmission line.

[0101] This application provides a device for predicting AC interference in a pipe jacking crossing section. A schematic diagram of the device is shown below. Figure 9 As shown, the numerical simulation apparatus 900 includes:

[0102] Acquisition module 901 is used to acquire the longitudinal electric field intensity of the target jacking pipe; and

[0103] Acquire AC interference monitoring information at both ends of the target pipe jacking, including the voltage at both ends of the target pipe jacking.

[0104] The processing module 902 is used to calculate the maximum AC interference voltage of the target jacking pipe based on the longitudinal electric field strength and the voltage at both ends of the target jacking pipe.

[0105] The acquisition module 901, when the pipe jacking section is parallel to the transmission line, marks the longitudinal electric field intensity as the first longitudinal electric field intensity, specifically for:

[0106] The monitoring information of the first longitudinal induced electromotive force within the range of the two ends of the target jacking pipe is obtained, and the maximum value is determined as the first longitudinal electric field strength based on the monitoring information of the first longitudinal induced electromotive force.

[0107] Module 901 is used specifically for:

[0108] Acquire monitoring information of the first longitudinal induced electromotive force at the starting point of the target pipe jacking and within a threshold length range from the starting point; or

[0109] Acquire the first longitudinal induced electromotive force monitoring information at the end of the target jacking pipe and within the threshold length range from the end.

[0110] Processing module 902 is specifically used for:

[0111] The first maximum AC interference voltage of the target pipe jacking is calculated according to the first formula, where the first formula is:

[0112] V dmax1 ≤V ter +E1L

[0113] Among them, V dmax1 V is the first maximum AC interference voltage of the target jacking pipe. ter E1 is the peak voltage at both ends of the target jacking pipe, and L is the maximum voltage at both ends of the target jacking pipe.

[0114] The acquisition module 901, when the pipe jacking section crosses the transmission line at an oblique angle, marks the longitudinal electric field intensity as the second longitudinal electric field intensity, specifically for:

[0115] Obtain the vertical distances from both ends of the target pipe jacking section to the railway track, and determine the parallel spacing based on these vertical distances; and

[0116] Obtain the estimated leakage impedance of the rail, and determine the second longitudinal electric field intensity of the target jacking pipe by referring to a table based on the estimated leakage impedance and parallel spacing.

[0117] Processing module 902 is specifically used for:

[0118] The second maximum AC interference voltage of the target pipe jacking is calculated according to the second formula, where the second formula is:

[0119]

[0120] Among them, V dmax2 The second maximum AC interference voltage of the target jacking pipe, V ter E2 is the peak voltage at both ends of the target jacking pipe, which is the maximum voltage at both ends of the target jacking pipe. L is the length of the target jacking pipe, and I is the maximum current in a single autotransformer section when the rail is running normally.

[0121] The acquisition module 901 is specifically used when the pipe jacking section is perpendicular to the transmission line for:

[0122] Obtain the ground electric field potential relative to the ground within the range of the starting and ending points of the target pipe jacking, and determine the maximum value of the ground electric field potential based on the ground electric field potential.

[0123] Processing module 902 is specifically used for:

[0124] Calculate the third maximum AC interference voltage of the target pipe based on the maximum ground electric field potential and the voltage at both ends of the pipe.

[0125] Calculate the third maximum AC interference voltage of the target pipe jacking, specifically including:

[0126] The third maximum AC interference voltage of the target pipe jacking is calculated according to the third formula, where the third formula is:

[0127] V dmax3 =V 顶 +V ter

[0128] Among them, V dmax3 The third maximum AC interference voltage of the target jacking pipe, V 顶 V represents the maximum value of the ground electric field potential for the target pipe jacking project. ter The peak voltage at the beginning and end of the target jacking pipe is the maximum voltage at the beginning and end of the target jacking pipe.

[0129] like Figure 10 As shown, one embodiment of this application provides an electronic device 1000, which includes a memory 1001 and a processor 1002.

[0130] The memory 1001 is used to store computer instructions that can be executed by the processor;

[0131] When executing computer instructions, processor 1002 implements each step of the method for predicting AC interference in the jacking tunnel section described in the above embodiments. For details, please refer to the relevant descriptions in the embodiments of the method for predicting AC interference in the jacking tunnel section.

[0132] Optionally, the memory 1001 can be either independent or integrated with the processor 1002. When the memory 1001 is configured independently, the electronic device also includes a bus for connecting the memory 1001 and the processor 1002.

[0133] This application also provides a computer-readable storage medium storing computer instructions. When a processor executes the computer instructions, it implements each step of the method for predicting AC interference in the jacking pipe crossing section described in the above embodiments.

[0134] This application also provides a computer program product, including computer instructions, which, when executed by a processor, implement the various steps in the method for predicting AC interference in the jacking pipe crossing section described above.

[0135] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0136] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for predicting AC interference in a pipe jacking crossing section, characterized in that, include: Obtain the longitudinal electric field intensity of the target pipe jacking; Acquire AC interference monitoring information at both ends of the target jacking pipe, wherein the AC interference monitoring information includes the peak voltage at both ends of the target jacking pipe, and the peak voltage at both ends of the target jacking pipe is the maximum value of the voltage at both ends of the target jacking pipe; The maximum AC interference voltage of the target jacking pipe is calculated based on the longitudinal electric field strength of the target jacking pipe and the peak voltage at both ends of the target jacking pipe. The crossing section of the target jacking pipe is parallel to the power transmission line. The longitudinal electric field strength is marked as the first longitudinal electric field strength. The first longitudinal electric field strength of the target jacking pipe is obtained by: obtaining the first longitudinal induced electromotive force monitoring information within the range of the two endpoints of the target jacking pipe, and determining the maximum value as the first longitudinal electric field strength based on the first longitudinal induced electromotive force monitoring information. The target pipe crossing section intersects the transmission line at an angle. The longitudinal electric field strength is marked as the second longitudinal electric field strength. The second longitudinal electric field strength of the target pipe is obtained by: obtaining the vertical distance between the two ends of the target pipe crossing section and the rail, and determining the parallel spacing based on the vertical distance; obtaining the estimated leakage impedance of the rail, and determining the second longitudinal electric field strength of the target pipe by looking up a table based on the estimated leakage impedance and the parallel spacing.

2. The method according to claim 1, characterized in that, Acquire the monitoring information of the first longitudinal induced electromotive force within the range of the two endpoints of the target jacking pipe, specifically including: Obtain monitoring information of the first longitudinal induced electromotive force at the starting end of the target pipe jacking and within a threshold length range from the starting end; or Acquire the monitoring information of the first longitudinal induced electromotive force at the end of the target jacking pipe and within the range of the threshold length from the end.

3. The method according to claim 1, characterized in that, Based on the first longitudinal electric field intensity of the target jacking pipe and the peak voltage at both ends of the target jacking pipe, the first maximum AC interference voltage of the target jacking pipe is calculated, specifically including: The first maximum AC interference voltage of the target jacking pipe is calculated according to the first formula, wherein the first formula is: V dmax1 ≤V ter +E1L Among them, V dmax1 V is the first maximum AC interference voltage of the target jacking pipe. ter E1 is the peak voltage at both ends of the target jacking pipe, E1 is the first longitudinal electric field intensity, and L is the length of the target jacking pipe.

4. The method according to claim 1, characterized in that, Based on the second longitudinal electric field intensity of the target jacking pipe and the peak voltage at both ends of the target jacking pipe, the second maximum AC interference voltage of the target jacking pipe is calculated, specifically including: The second maximum AC interference voltage of the target jacking pipe is calculated according to the second formula, whereby the second formula is: V dmax2 ≤V ter + E2L Among them, V dmax2 V is the second maximum AC interference voltage of the target jacking pipe. ter E1 is the peak voltage at both ends of the target jacking pipe, E2 is the second longitudinal electric field strength, L is the length of the target jacking pipe, and I is the maximum current in a single autotransformer section when the rail is running normally.

5. The method according to claim 1, characterized in that, When the target pipe jacking section is perpendicular to the transmission line, the method further includes: Obtain the ground electric field potential relative to the ground within the range of the starting and ending points of the target pipe jacking, and determine the maximum value of the ground electric field potential based on the ground electric field potential.

6. The method according to claim 5, characterized in that, The method also includes: The third maximum AC interference voltage of the target jacking pipe is calculated based on the maximum ground electric field potential of the target jacking pipe and the peak voltage at both ends of the target jacking pipe. The calculation of the third maximum AC interference voltage of the target jacking pipe specifically includes: The third maximum AC interference voltage of the target jacking pipe is calculated according to the third formula, wherein the third formula is: V dmax3 =V 顶 +V ter Among them, V dmax3 V is the third maximum AC interference voltage of the target jacking pipe. 顶 V represents the maximum value of the ground electric field potential for the target pipe jacking project. ter The peak voltage at both ends of the target jacking pipe.

7. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1 to 6.

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