Method for determining lateral displacement rate of power transmission line

Abstract

This invention discloses a method for determining the lateral displacement rate of transmission lines, belonging to the field of transmission line detection technology. The method includes: establishing a geometric model; determining a proportionally scaled geometric model of the planned and actual construction paths of a high-voltage transmission line based on the coordinates and length of the actual path of the project; establishing a geometric algorithm based on the geometric model of the planned and actual construction paths to determine if the lateral displacement between the planned and actual construction paths exceeds 500m; performing geometric calculations on each line segment determined by the algorithm to calculate the cumulative length and lateral displacement rate of the line with a lateral displacement exceeding 500m; and determining whether a significant change has occurred in the actual construction of the high-voltage transmission line project according to prescribed criteria. This invention can quickly and accurately calculate the percentage of the line with displacement relative to the designed path, facilitating the rapid determination of whether a power transmission and transformation project has undergone a significant change.

Description

Technical Field

[0001] This invention relates to a method for determining the lateral displacement rate of a power transmission line, belonging to the field of power transmission line detection technology. Background Technology

[0002] In recent years, with the rapid development of my country's economy, the demand for electricity has been increasing, and the construction of high-voltage transmission and transformation lines has become more and more common. Therefore, new standards and requirements have been put forward for the planning and construction of new transmission lines. To further regulate the environmental management of transmission and transformation construction projects, for transmission line projects where there are significant changes in the scope or content of the project, the environmental impact assessment documents must be resubmitted for approval in accordance with the law before the project commences.

[0003] Currently, high-voltage transmission lines utilize long-distance transmission, and their routes and terrains are complex and variable. Before or during construction, the lines are subject to minor adjustments due to local planning and other conditions. For example, to reduce the impact of transmission line construction on newly adjusted nature reserves, the lines may be moved out of the proposed protected area. According to the "List of Major Changes in Power Transmission and Transformation Projects (Trial Implementation)," a major change is defined as a transmission line whose lateral displacement exceeds 500 meters and whose cumulative length exceeds 30% of the original path length, potentially leading to a significant aggravation of adverse environmental impacts. Therefore, accurately calculating the cumulative length and lateral displacement rate of lines with lateral displacement exceeding 500 meters in power transmission and transformation projects is of great significance and necessity.

[0004] However, there is currently no method to quickly and efficiently calculate the total length of transmission line projects with lateral displacement exceeding 500m. This makes the parameter measurement of transmission and transformation lines complicated and makes it difficult to determine whether a transmission line project has undergone major changes. Summary of the Invention

[0005] To address the aforementioned technical challenges, this invention proposes a method for determining the lateral displacement rate of transmission lines, particularly a method for measuring the cumulative length and determining the lateral displacement rate of transmission lines with a lateral displacement exceeding 500m, thereby solving the problems of complex and inaccurate measurement processes for transmission line project parameters.

[0006] The technical solution of the present invention is as follows:

[0007] A method for determining the lateral displacement rate of a power transmission line includes the following steps:

[0008] S1: Establish a geometric model. Based on the coordinates and length of the actual path of the high-voltage transmission line construction project, determine a proportionally scaled geometric model of the planned and actual construction path of the high-voltage transmission line.

[0009] S2: Based on the geometric model of the high-voltage transmission line planning and actual construction path, establish a geometric algorithm to determine the line where the lateral displacement between the high-voltage transmission line planning and actual construction path exceeds 500m.

[0010] S3: Based on the geometric algorithm of S2, perform geometric calculations on each line segment to calculate the cumulative length and lateral displacement rate of the line with a lateral displacement exceeding 500m. Based on the definition standards stipulated in the "List of Major Changes in Power Transmission and Transformation Construction Projects (Trial)", determine whether the actual high-voltage transmission line construction project has undergone major changes.

[0011] Furthermore, step S2 specifically includes:

[0012] The geometric model of the planned and actual construction path of high-voltage transmission lines is abstracted into the relationship between lines. Scenario 1: The actual length of the constructed transmission line is greater than the original design length; Scenario 2: The actual length of the constructed transmission line is less than the original design length; the original design transmission line is L. 0= The actual constructed transmission line is L1+L2+L4, with L1+L3+L4. The line segments experiencing lateral displacement are denoted as D1, D2, D3…D… n .

[0013] Furthermore, step S3 specifically includes:

[0014] Construct a cumulative length function for a line segment with a lateral displacement exceeding 500m on the geometric model. When the relationship between the actual constructed transmission line length and the original design transmission line length is as described in Case 1, arbitrarily select two points O1 and O2 on the actual constructed transmission line L4. Draw a circle with O1 and O2 as centers and a radius of 500m, such that the circle is tangent to the original design transmission line path L2, with tangency points A1 and A2. Then, the length of this segment of the line with a lateral displacement exceeding 500m is:

[0015]

[0016] The displacement rate at which this segment undergoes lateral displacement is:

[0017] ;

[0018] When the relationship between the actual constructed transmission line length and the original design transmission line length is as described in Case Two, take any two points O1 and O2 on the actual constructed transmission line L4. Draw a circle with O1 and O2 as centers and a radius of 500m, such that the circle is tangent to the original design path L2, with the tangency points being A1 and A2. Then, the length of the line path where the lateral displacement exceeds 500m is:

[0019] ;

[0020] The displacement rate at which this segment undergoes lateral displacement is:

[0021] ;

[0022] If R1 or R2 is greater than 30%, then the transmission line construction project has undergone a major change and a new environmental impact assessment is required; if R1 or R2 is less than 30% and the project does not violate other provisions in the "List of Major Changes in Transmission and Transformation Construction Projects (Trial Implementation)," then the transmission line construction project has not undergone a major change and a new environmental impact assessment is not required.

[0023] The advantages of this invention are:

[0024] This invention can quickly and accurately calculate the percentage of the line that has been displaced relative to the designed path, making it easy to quickly determine whether a power transmission and transformation project has undergone a major change. Attached Figure Description

[0025] Figure 1 This is a flowchart of the present invention;

[0026] Figure 2 A schematic diagram showing the relationship between the actual length of the constructed transmission line and the original design length;

[0027] Figure 3 This is a schematic diagram for calculating the lateral displacement rate of power transmission and transformation lines. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example 1.

[0030] like Figure 1 As shown, a method for determining the lateral displacement rate of a power transmission line is characterized by comprising the following steps:

[0031] S1: Establish a geometric model. Based on the coordinates and length of the actual path of the high-voltage transmission line construction project, determine a proportionally scaled geometric model of the planned and actual construction path of the high-voltage transmission line.

[0032] S2: Based on the geometric model of the high-voltage transmission line planning and actual construction path, establish a geometric algorithm to determine the line where the lateral displacement between the high-voltage transmission line planning and actual construction path exceeds 500m.

[0033] Furthermore, step S2 specifically includes:

[0034] like Figure 2As shown, the geometric model of the planned and actual construction path of high-voltage transmission lines is abstracted into the relationship between lines. Case 1: The actual length of the constructed transmission line is greater than the original design length; Case 2: The actual length of the constructed transmission line is less than the original design length; the original design transmission line is L. 0= The actual constructed transmission line is L1+L2+L4, with L1+L3+L4. The line segments experiencing lateral displacement are denoted as D1, D2, D3…D… n .

[0035] S3: Based on the geometric algorithm of S2, perform geometric calculations on each line segment to calculate the cumulative length and lateral displacement rate of the line with a lateral displacement exceeding 500m. Based on the definition standards stipulated in the "List of Major Changes in Power Transmission and Transformation Construction Projects (Trial)", determine whether the actual high-voltage transmission line construction project has undergone major changes.

[0036] Furthermore, step S3 specifically includes:

[0037] like Figure 3 As shown, a cumulative length function for a line segment experiencing a lateral displacement exceeding 500m is constructed on the geometric model. When the relationship between the actual constructed transmission line length and the original design transmission line length is as described in Case 1, two arbitrary points O1 and O2 are selected on the actual constructed transmission line L4. A circle is drawn with O1 and O2 as centers and a length of 500m as a radius, such that the circle is tangent to the original design transmission line path L2, with tangency points A1 and A2. Then, the length of this segment of the line experiencing a lateral displacement exceeding 500m is:

[0038]

[0039] The displacement rate at which this segment undergoes lateral displacement is:

[0040] ;

[0041] When the relationship between the actual constructed transmission line length and the original design transmission line length is as described in Case Two, take any two points O1 and O2 on the actual constructed transmission line L4. Draw a circle with O1 and O2 as centers and a radius of 500m, such that the circle is tangent to the original design path L2, with the tangency points being A1 and A2. Then, the length of the line path where the lateral displacement exceeds 500m is:

[0042] ;

[0043] The displacement rate at which this segment undergoes lateral displacement is:

[0044] ;

[0045] According to the "List of Major Changes in Power Transmission and Transformation Construction Projects (Trial Implementation)," a major change is defined as a transmission line whose lateral displacement exceeds 500 meters and whose cumulative length exceeds 30% of the original path length, potentially leading to a significant aggravation of adverse environmental impacts. If R1 or R2 is greater than 30%, the transmission line construction project has undergone a major change and a new environmental impact assessment is required. If R1 or R2 is less than 30%, and the project does not violate other provisions of the "List of Major Changes in Power Transmission and Transformation Construction Projects (Trial Implementation)," the transmission line construction project has not undergone a major change and a new environmental impact assessment is not required.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for determining the lateral displacement rate of a power transmission line, characterized in that, Includes the following steps: S1: Establish a geometric model. Based on the coordinates and length of the actual path of the high-voltage transmission line construction project, determine a proportionally scaled geometric model of the planned and actual construction path of the high-voltage transmission line. S2: Based on the geometric model of the high-voltage transmission line planning and actual construction path, establish a geometric algorithm to determine the line where the lateral displacement between the high-voltage transmission line planning and actual construction path exceeds 500m. The geometric model of the planned and actual construction path of high-voltage transmission lines is abstracted into the relationship between lines. Case 1: The actual length of the constructed transmission line is greater than the original design length; Case 2: The actual length of the constructed transmission line is less than the original design length. The original design of the transmission line was L 0= The actual constructed transmission line is L1+L2+L4, with L1+L3+L4. The line segments experiencing lateral displacement are denoted as D1, D2, D3…D… n ; S3: Based on the geometric algorithm of S2, perform geometric calculations on each line segment to calculate the cumulative length and lateral displacement rate of the line with a lateral displacement exceeding 500m. Based on the definition standards stipulated in the "List of Major Changes in Power Transmission and Transformation Construction Projects (Trial)", determine whether the actual high-voltage transmission line construction project has undergone major changes. Specifically, step S3 includes: Construct a cumulative length function for a line segment with a lateral displacement exceeding 500m on the geometric model. When the relationship between the actual constructed transmission line length and the original design transmission line length is as described in Case 1, arbitrarily select two points O1 and O2 on the actual constructed transmission line L4. Draw a circle with O1 and O2 as centers and a radius of 500m, such that the circle is tangent to the original design transmission line path L2, with tangency points A1 and A2. Then, the length of this segment of the line with a lateral displacement exceeding 500m is: ； The displacement rate at which this segment undergoes lateral displacement is: ； When the relationship between the actual constructed transmission line length and the original design transmission line length is as described in Case Two, take any two points O1 and O2 on the actual constructed transmission line L4. Draw a circle with O1 and O2 as centers and a radius of 500m, such that the circle is tangent to the original design path L2, with the tangency points being A1 and A2. Then, the length of the line path where the lateral displacement exceeds 500m is: ； The displacement rate at which this segment undergoes lateral displacement is: ； If R1 or R2 is greater than 30%, then the transmission line construction project has undergone a major change and a new environmental impact assessment is required; if R1 or R2 is less than 30% and the project does not violate other provisions in the "List of Major Changes in Transmission and Transformation Construction Projects (Trial Implementation)," then the transmission line construction project has not undergone a major change and a new environmental impact assessment is not required.

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