CN115455104A

CN115455104A - Power transmission line selection ranking and visualization method and device based on Web end

Info

Publication number: CN115455104A
Application number: CN202210907856.1A
Authority: CN
Inventors: 李志斌; 胡博; 王刚; 周高伟; 刘永涛; 赵剑; 赵晶; 孙新博
Original assignee: Beijing North Star Technology Development Co ltd
Current assignee: Beijing North Star Technology Development Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-29
Publication date: 2022-12-09

Abstract

The application provides a method and a device for line selection, ranking and visualization of a power transmission line based on a Web end. The method comprises the following steps: acquiring a power transmission line path; calculating the specific load of the power transmission line path according to the power transmission line path; determining the stress and sag of the power transmission line path according to the specific load; setting an essential tower erection section and a forbidden tower erection section of the power transmission line path, and determining a tower set of the power transmission line path according to the essential tower erection section and the forbidden tower erection section; and determining a line selection and arrangement scheme of the power transmission line path according to the tower set, the stress and the sag, and visualizing the line selection and arrangement scheme at a Web end. The method and the device can ensure that the line selection and the pole tower ranking of the power transmission line path completely meet the requirements of external meteorological and geological conditions, so that the line selection ranking of the whole power transmission line design is matched with the actual requirements, and the line selection and the ranking of the power transmission line path are more accurate.

Description

Power transmission line selection ranking and visualization method and device based on Web end

Technical Field

The application relates to the technical field of line selection and ranking, in particular to a method and a device for line selection and ranking and visualization of a power transmission line based on a Web end.

Background

At present, the power transmission channel optimization design work is mainly carried out based on a Hailawa system operation platform, data is relatively dependent on conventional frame type aerial images, however, the Hailawa system operation platform has the characteristics of short construction period, multiple data types and the like along with the optimization design of a power transmission line, has the defects of system closure, low data compatibility, low path optimization mode efficiency and the like, and cannot be matched with the requirements of the existing power transmission channel optimization design. The system closure is represented by that the Heilawa operating system is a DOS operating system and has certain limitation in the aspect of function optimization; the low data compatibility is shown in that the Heilawa operating system does not support data such as an inclined model, laser point cloud, SHP vector and the like, and is not beneficial to the innovation of optimization and design work of a power transmission channel; the low optimization efficiency is reflected in that the Hiragana hardware equipment is older and the performance cannot keep up with the engineering scale requirement; in addition, the integral application integration level of the Hailawa system is not high, three links such as early-stage data preparation, middle-stage optimization design and later-stage result arrangement are often required to be developed across platforms, the efficiency is low, the data are dispersed, and the engineering management application is not facilitated.

With the development of three-dimensional GIS and remote sensing technology, a power transmission channel optimization design platform applied to the power industry is developed in the directions of multi-source data, rich functions, platform compatibility and the like, and the optimization design comprehensive service is developed by integrating the advantages of data and GIS, so that the advantages of the data are brought into play, and the design quality is improved; in addition, the cloud service technology rises in the multi-industry application of the market, and an optimization and design platform needs to break through the existing single-machine version application mode of the C/S terminal, innovate a remote cooperative optimization design service scene and comply with the actual demand of power transmission channel optimization design. Meanwhile, the optimization design platform needs to consider the application improvement of transverse results and the extending capability of longitudinal services, and has high requirements on the comprehensive performance of the platform actually.

However, according to the prior art, due to the lack of consideration of external meteorological and geological conditions, the line selection and arrangement of the whole power transmission line design is not matched with the actual requirements, so that great economic loss and unpredictable dangers exist.

Disclosure of Invention

The application provides a method and a device for line selection and ranking and visualization of a power transmission line based on a Web end, and aims to solve the problem of inaccurate ranking in the power transmission line.

In a first aspect, the application provides a method for line selection, ranking and visualization of a power transmission line based on a Web end, comprising the following steps:

acquiring a power transmission line path;

calculating the specific load of the power transmission line path according to the power transmission line path;

determining the stress and sag of the power transmission line path according to the specific load;

setting an essential tower erection section and a prohibited tower erection section of the power transmission line path, and determining a tower set of the power transmission line path according to the essential tower erection section and the prohibited tower erection section;

and determining a line selection and arrangement scheme of the power transmission line path according to the pole and tower set, the stress and the sag, and visualizing the line selection and arrangement scheme at a Web end.

In a possible implementation manner, the obtaining the power transmission line path includes:

dividing the power transmission line into N stages, wherein each stage comprises a plurality of nodes, and N is a positive integer greater than or equal to 2;

for any one stage, calculating the cost of each node in each stage, wherein the cost of each node is the cost from the terminal to the surface of each node in the stage;

setting the cost of each node as an initial value, and calculating the cost of each stage in the power transmission line path, wherein the cost of each stage is the cost of the power transmission line path from a terminal to the surface of each stage;

determining a flat section diagram of the power transmission line path according to the cost of each stage;

and acquiring the power transmission line path according to the plane section diagram.

In a possible implementation manner, the specific load of the power transmission line path comprises a self-weight specific load, an ice-weight specific load, a self-weight-to-ice specific load, a wind pressure specific load without ice coating, a wind pressure specific load with ice coating and a comprehensive specific load, wherein the comprehensive specific load comprises a wind comprehensive specific load without ice coating and a wind comprehensive specific load with ice coating;

determining the wind comprehensive specific load when the ice coating is not generated through a first formula

Wherein, g _1,1 K is the wind integrated specific load when the ice coating is not applied ₁ Is the coefficient of the wind integrated specific load g when the ice coating is not applied ₀ Is the specific weight of g ₃ The wind pressure specific load is the wind pressure specific load when the ice coating is not carried out;

determining the wind comprehensive specific load when the ice is coated by a second formula

Wherein, g _1,2 K is the wind integrated specific load when the ice is coated ₂ The coefficient g of the wind comprehensive specific load when the ice is coated ₂ G is the specific load of the dead weight and the ice coating ₄ The specific load of the wind pressure when the ice coating exists.

In a possible implementation manner, the determining the stress and sag of the power transmission line path according to the specific load includes:

determining the critical span of the power transmission line path according to the specific load of the power transmission line path;

determining the critical temperature of the power transmission line path according to the specific load of the power transmission line path, wherein the critical temperature judges the meteorological condition of the maximum sag;

and determining the stress and sag of the power transmission line path through the critical span and the critical temperature.

In a possible implementation manner, the critical span of the power transmission line path is determined by a third formula, where the third formula is

Wherein l _m Is the critical span, σ, of the transmission line path ₁ And σ ₂ Stress of the wire in different states, t ₁ And t ₂ Temperature in different states, g ₁ And g ₂ The specific load of the lead in different states, a is the elastic elongation coefficient of the lead, and b is the linear temperature expansion coefficient of the lead;

determining the critical temperature of the power transmission line path through a fourth formula, wherein the fourth formula is

Wherein, t _m Is the critical temperature, t, of the transmission line path ₂ Is the temperature under the dead weight and ice coating ratio, σ ₂ Stress under the specific load of the self-weight and the ice coating, g ₀ To the specific weight, g ₂ The self weight and the ice coating ratio are loaded;

determining the stress and sag of the power transmission line path through the critical span and the critical temperature comprises:

the stress of the power transmission line path is expressed by a state equation under the control of meteorological conditions, and the state equation under the control of the meteorological conditions is expressed by a fifth formula

Wherein σ is the stress of the power transmission line path, l is the span of the power transmission line path, and σ _i Stress under control of said meteorological conditions, g _i Specific load under control of said meteorological conditions, t _i The air temperature under the control of the meteorological conditions;

wherein the state equations under meteorological condition control comprise a state equation under meteorological condition control of a lowest air temperature, a maximum wind speed or with icing and a state equation under meteorological condition control of an annual average air temperature;

determining the sag of the power transmission line path through a sixth formula, wherein the sixth formula is

Wherein f is the sag of the power transmission line path.

In a possible implementation manner, the setting an indispensable tower erection section and an prohibited tower erection section of the power transmission line path, and determining a tower set of the power transmission line path according to the indispensable tower erection section and the prohibited tower erection section includes:

setting a section which must be erected and a section which forbids to be erected of the power transmission line path according to the power transmission line path and the ranking knowledge;

and determining a tower set of the power transmission line path according to the sections which need to be erected and the sections which are forbidden to be erected.

In a possible implementation manner, the determining a line selection and placement scheme of the power transmission line path according to the pole and tower set, the stress, and the sag, and visualizing the line selection and placement scheme at a Web end includes:

calculating the cost of the transmission line path according to the tower set;

according to the stress and the sag, constraining the cost of the power transmission line path to obtain the lowest cost of the power transmission line path;

determining a line selection and position arrangement scheme of the power transmission line path through the line selection and pole tower set corresponding to the lowest cost;

and visualizing at the Web end according to the line selection and position arrangement scheme.

In a second aspect, the present application provides a power transmission line selection, ranking and visualization device based on a Web end, including:

the acquisition module is used for acquiring a power transmission line path;

the calculation load comparison module is used for calculating the load comparison of the power transmission line path according to the power transmission line path;

the stress sag module is used for determining the stress and sag of the power transmission line path according to the specific load;

the tower assembly module is used for setting an essential tower erection section and a prohibited tower erection section of the power transmission line path, and determining a tower assembly of the power transmission line path according to the essential tower erection section and the prohibited tower erection section;

and the determining module is used for determining a line selection and arrangement scheme of the power transmission line path according to the pole and tower set, the stress and the sag, and visualizing the line selection and arrangement scheme at a Web end.

In a third aspect, the present application provides a terminal, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to the first aspect or any one of the possible implementation manners of the first aspect when executing the computer program.

In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method as described above in the first aspect or any one of the possible implementations of the first aspect.

The application provides a method and a device for line selection and ranking of a power transmission line based on a Web end, wherein the specific load of the power transmission line path is calculated by obtaining the power transmission line path, the stress and sag of the power transmission line path are determined, the line selection and ranking of the power transmission line path are ensured to fully consider external meteorology, a necessary tower erection section and a tower erection prohibition section of the power transmission line path are set, a tower set of the power transmission line path is determined according to the necessary tower erection section and the tower erection prohibition section, the tower ranking of the power transmission line path is ensured to fully consider geological conditions, and a line selection and ranking scheme of the power transmission line path is determined according to the tower set, the stress and sag, so that the line selection and ranking of the power transmission line path are ensured to fully meet the requirements of the external meteorology and geological conditions, the designed line selection and ranking of the whole power transmission line are matched with actual requirements, and the line selection and ranking of the power transmission line path are more accurate.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.

Fig. 1 is a flowchart illustrating an implementation of a method for line selection, ranking and visualization of a power transmission line based on a Web terminal according to an embodiment of the present application;

fig. 2 is a flowchart of an implementation of the method for line selection, ranking and visualization of the power transmission line based on the Web end according to the embodiment of the present application;

fig. 3 is an operation flowchart of a method for line selection, ranking and visualization of a power transmission line based on a Web end according to an embodiment of the present application;

fig. 4 is an overall architecture diagram of a power transmission line selection and placement and visualization method based on a Web end according to the embodiment of the present application;

fig. 5 is a system block diagram of a power transmission line selection ranking and visualization method based on a Web end according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a power transmission line selection, placement and visualization device based on a Web end according to an embodiment of the present application;

fig. 7 is a schematic diagram of a terminal according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

To make the objects, technical solutions and advantages of the present application more clear, the following description is made by way of specific embodiments with reference to the accompanying drawings.

Fig. 1 is a flowchart illustrating implementation of a method for line selection, ranking and visualization of a power transmission line based on a Web end according to a first embodiment of the present application, which is detailed as follows:

in step 101, a transmission line path is acquired.

In one possible implementation, the obtaining the power transmission line path includes:

and acquiring a power transmission line path according to the flat section diagram.

In the embodiment, the path planning is realized by adopting a shortest path algorithm, a flat section diagram of the power transmission line is determined according to the realized path planning, and the power transmission line path is obtained on the flat section diagram.

Path planning methods generally have three types: the method comprises a marking method, a heuristic search method and an artificial intelligence method, wherein the heuristic search method after optimization is adopted in the embodiment.

In step 102, a specific load of the transmission line path is calculated according to the transmission line path.

The specific load refers to the mechanical load acting on the wire, such as dead weight, ice weight and wind pressure, which may be uneven, but for the convenience of calculation, the load is generally considered to be evenly distributed along the wire. The common specific loads comprise seven types, namely dead weight specific load, ice weight specific load, wire dead weight ice weight total specific load, wind pressure specific load in the absence of ice, pressure specific load in the icing time, comprehensive specific load in the absence of ice and wind and total specific load in the presence of ice and wind.

The wind speed, the ice coating thickness and the temperature are taken as three elements of meteorological conditions, and play a leading role in the mechanical performance of the power transmission line, so the specific load of a wire is calculated firstly when the power transmission line is designed.

In a possible implementation mode, the specific load of the power transmission line path comprises a dead weight specific load, an ice weight specific load, a dead weight and ice coating specific load, a wind pressure specific load without ice coating, a wind pressure specific load with ice coating and a comprehensive specific load, wherein the comprehensive specific load comprises a wind comprehensive specific load without ice coating and a wind comprehensive specific load with ice coating;

determining the wind comprehensive specific load without ice coating through a first formula

Wherein, g _1,1 K is the combined specific load of wind when there is no ice coating ₁ Is the coefficient of wind integrated specific load g when there is no ice coating ₀ Specific gravity of g ₃ The wind pressure specific load is the wind pressure specific load when the ice coating is not generated;

Wherein, g _1,2 K is the wind integrated specific load when ice is coated ₂ G is the coefficient of wind comprehensive specific load when ice is coated ₂ G is the specific load of self weight and ice coating ₄ The specific load of wind pressure is when there is icing.

Wherein, dead weight specific load refers to the specific load caused by the weight of the wire, and the calculation formula is as follows:

wherein, g ₀ Is dead weight specific load and has a unit of N/mm ² ，m ₀ The mass of each kilometer of the wire is kg/km, S is the cross section of the wire and is mm ² 。

The ice weight specific load refers to the specific load generated by ice weight when a wire is coated with ice, and the calculation formula is as follows:

wherein, g ₁ Is ice weight specific load and has a unit of N/mm ² B is the thickness of the ice coating in mm, d is the diameter of the wire in mm, and S is the cross-sectional area of the wire in mm ² 。

The dead weight and ice coating specific load is the sum of the dead weight specific load and the ice weight specific load of the wire, and the calculation formula is as follows:

g ₂ ＝g ₀ +g ₁ (3)

wherein, g ₂ Is the specific load of dead weight and ice coating, and the unit is N/mm ² 。

The wind pressure specific load without ice coating refers to the wind pressure load acting on the wire per square millimeter without ice coating, and the calculation formula is as follows:

wherein, g ₃ The specific load of wind pressure is N/mm when no ice is coated ² C is the wind carrier coefficient, wherein, when the diameter d of the wire is<When the diameter d of the lead is more than or equal to 17mm, C =1.2, when the diameter d of the lead is more than or equal to 17mm, C =1.1, v is the design wind speed in m/S, d is the diameter of the lead in mm, S is the cross section of the lead in mm ² And a is a wind speed unevenness coefficient, wherein a =1.0 when the design wind speed is 20m/s or less, a =0.85 when the design wind speed is greater than 20m/s and less than 30m/s, a =0.75 when the design wind speed is greater than 30m/s and less than 35m/s, and a =0.7 when the design wind speed is greater than 35 m/s.

The wind pressure specific load when icing exists refers to the wind pressure load of each square millimeter of the icing conductor, and the calculation is as follows:

wherein, g ₄ The specific load of wind pressure is N/mm when the ice is coated ² And C is a wind carrier coefficient, and C =1.2 is taken.

When there is no ice coating, the wind comprehensive specific load isWhen no ice coating and wind exist, the dead weight ratio g in the vertical direction acts on the lead ₀ And wind pressure specific load g in horizontal direction when there is no ice coating ₃ And synthesizing according to the vector to obtain the wind comprehensive specific load when the ice coating is not generated.

The wind comprehensive specific load when the ice is covered means that the self weight and the ice specific load g of the wire when the ice is covered ₂ And specific load g of wind pressure with ice coating ₄ The vector sum of (c).

In step 103, the stress and sag of the transmission line path are determined according to the specific load

When the power transmission line is erected, the power transmission line is easily influenced by external meteorological and geological conditions, wherein the meteorological conditions have a large influence on the power transmission line, and when the external temperature or the load changes, the length of the wire changes along with the influence, so that the sag and the stress of the wire are changed. Too little sag can make the wire draw in too tightly to lead to the too big, aggravation vibrations of stress, increase the load of shaft tower, too big sag can make the wire relax, safe distance to ground is not enough, just need improve the height of shaft tower and increase the head size of shaft tower, leads to the cost expense of increase circuit.

Thus, in this embodiment, wire stress and sag calculations are made based on the meteorological conditions in which the maximum sag occurs.

In one possible implementation, determining the stress and sag of the transmission line path according to the specific load comprises:

In one possible implementation, the critical span of the transmission line path is determined by a third formula

Wherein l _m Critical span, σ, of transmission line path ₁ And σ ₂ Is the stress of the wire in different states, t ₁ And t ₂ Temperature in different states, g ₁ And g ₂ The specific load of the wire in different states, a is the elastic elongation coefficient of the wire, and b is the linear temperature expansion coefficient of the wire.

Wherein, in order to ensure the use safety of the transmission line under any meteorological condition, the maximum stress of the transmission line must be equal to the allowable stress. The meteorological condition in which the maximum stress occurs is called the control meteorological condition, and the span in which the wire reaches the maximum allowable stress in this meteorological condition is called the critical span.

Determination of the critical gear:

firstly, g/sigma ratios under different control meteorological conditions are calculated, and corresponding critical span is calculated.

Second, if the critical span l _m Is an imaginary number, when the g/sigma ratio of the two control conditions is not equal, the larger value of g/sigma is used for controlling all the span distances; when the g/sigma ratios of the two control conditions are equal to each other

The smaller value of the control range controls the whole span;

if the critical span l _m If it is ∞, then

The smaller value of the control range controls the whole span;

if the critical span l _m If it is an indeterminate value, it is controlled simultaneously by two meteorological conditions.

Third, if a zero or imaginary condition occurs in the critical span during a meteorological control condition, the data should be discarded.

In one possible implementation, the critical temperature of the transmission line path is determined by a fourth formula

Wherein, t _m Critical temperature, t, of the transmission line path ₂ Temperature under the specific load of self-weight and ice coating ₂ Stress under dead weight and specific load of ice coating, g ₀ Specific gravity of g ₂ The specific load is the self weight and the ice coating.

The maximum sag of the power transmission line refers to the maximum sag of the power transmission line in a vertical plane under the seamless meteorological condition. In order to ensure that the power transmission line meets the safety distance to the ground and other crossed objects when the power transmission line has the maximum sag, the most commonly used judgment method comprises a critical temperature method and a critical specific load method, wherein the method needs to know which meteorological condition the sag of the power transmission line is the maximum in engineering design. For this example, the critical temperature method was used.

The critical temperature method is to select a critical temperature at which the self-weight sag of the transmission line is equal to the sag under the maximum vertical specific load.

In one possible implementation, determining the stress and sag of the transmission line path by the critical span and the critical temperature comprises:

the stress of the power transmission line path is expressed by a state equation under the control of meteorological conditions, the state equation under the control of meteorological conditions is expressed by a fifth formula, and the fifth formula is

Wherein, sigma is the stress of the power transmission line path, l is the span of the power transmission line path, and sigma is _i Stress under control of meteorological conditions, g _i Specific load under control of meteorological conditions, t _i The temperature is controlled under meteorological conditions;

wherein the state equations under meteorological condition control include a state equation under meteorological condition control of a minimum air temperature, a maximum wind speed, or with icing and a state equation under meteorological condition control of an annual average air temperature.

Wherein the equation of state under the control of the lowest air temperature, the maximum wind speed or the meteorological conditions with ice coating is

Wherein σ _max Stress controlled by minimum air temperature, maximum wind speed or meteorological conditions with ice coating, g _m Specific load controlled by minimum air temperature, maximum wind speed or meteorological conditions with ice coating, t _m Is the air temperature under control of the lowest air temperature, the maximum wind speed or meteorological conditions with ice coating.

G if the weather condition is controlled to be the lowest temperature _m ＝g ₀ (ii) a G if the control meteorological condition is maximum wind speed _m ＝g _1,1 (ii) a G if the weather condition is controlled to have icing _m ＝g _1,2 。

When the equation of state under the meteorological control condition of the annual average temperature and temperature is

Wherein σ _cp Is the stress under meteorological control conditions in terms of annual average air temperature.

In one possible implementation, the sag of the transmission line path is determined by a sixth formula

Wherein f is the sag of the transmission line path.

When the power transmission line is designed, the sag of the power transmission line under each meteorological condition is not required to be calculated generally, and the calculation is carried out according to actual needs.

In step 104, an essential tower erection section and an forbidden tower erection section of the power transmission line path are set, and a tower set of the power transmission line path is determined according to the essential tower erection section and the forbidden tower erection section.

In a possible implementation manner, setting an indispensable tower erection section and an prohibited tower erection section of the power transmission line path, and determining a tower set of the power transmission line path according to the indispensable tower erection section and the prohibited tower erection section, includes:

setting a necessary tower erection section and a forbidden tower erection section of the power transmission line path according to the power transmission line path and the ranking knowledge;

and determining a tower set of the transmission line path according to the sections which must be erected and the sections which are forbidden to be erected.

The tower arrangement is carried out on the basis of data of power transmission line path planning through automatic or manual line selection. The process of tower arrangement is to arrange a vertical tower on a power transmission line and select the most suitable vertical tower point and tower type to ensure that the construction cost on the power transmission line is the lowest.

In the process of arranging the towers, the constraint of the ground wires on the clearance distance and the span limitation between the towers are required, the tower type required by the transmission line is determined through the limitation, and the specific constraint limiting conditions are detailed in the step 103.

In the present embodiment, it is also necessary to determine that the tower erection necessary section and the tower erection prohibited section are set;

for the section where the tower must be erected, setting the area range between two adjacent tower erecting points as an assumed transmission line independent area A _x The independent areas are represented in a set, namely A _j ＝{A _i I =1,2, \ 8230;, I }, then a _m ∈A _x And a is _n ∈A _x ,A _x ∈A _j Wherein a is _m And a _n The tower is arranged at different positions in the transmission line.

For the section where the tower erection is forbidden, the section inevitably passes through the sections which cannot erect the tower, such as difficult geological zones and lakes and marshes and the like in the process of erecting the power transmission lineThe area can be avoided when the tower is erected in actual engineering. Set a of sampling points according to possible tower erection of the transmission line _t The point locations and areas which can not stand the tower are deleted, so as to meet the actual requirement of standing the tower, and a needs to be met _m ∈A _t And

wherein A is _f To prohibit tower erection and areas.

And determining a tower set of the transmission line according to the tower area which must be erected and the tower area which is forbidden to be erected.

In step 105, according to the pole tower set, the stress and the sag, a line selection and ranking scheme of the power transmission line path is determined, and the line selection and ranking scheme is visualized at the Web end.

In a possible implementation manner, determining a line selection and ranking scheme of a power transmission line path according to a pole tower set, stress and sag, and visualizing the line selection and ranking scheme at a Web end includes:

calculating the cost of the transmission line path according to the tower set;

according to the stress and the sag, the cost of the power transmission line path is restrained, and the lowest cost of the power transmission line path is obtained;

determining a line selection and position arrangement scheme of a power transmission line path through a line selection and pole tower set corresponding to the lowest cost;

and performing visualization at the Web end according to the line selection and position arrangement scheme.

Among them, stress and sag are increasingly constrained during the lowest cost calculation.

Suppose that A is set from sample points _t To select a pyramid subset A _(t，t) The ranking project established by the tower position set can ensure the cost value of the power transmission line

And is minimal. Wherein for the pyramidal subset A _(t，t) ∈A _t ，t _n Is a _n Tower of (b), t _n ∈T _t ，T _t For optional tower sets in system engineering, V (a) _n ,t _n ) Is at a _n On a tower t _n The cost of (a).

In this embodiment, according to the dynamic planning method, the ranking problem of the whole power transmission line is divided into N sub-stages, and the optimal ranking scheme from each sampling point to the preceding sampling point can be found as a sub-problem of the whole ranking problem. According to the habit, the arrangement sequence of the towers is performed from left to right once, and a point (a) is assumed _i ,t _k ) The next adjacent point is (a) _x ,t _n )。

According to the formula, after the tower position set and the tower set are obtained, W (a) _i ,t _k ) For erecting a strip from the starting point to a ₁ On a tower a _i Wherein for i =1,2, \ 8230;, N; k =1,2, \ 8230;, R. If the current sample point is the starting point a ₁ Then W (a) ₁ ,t _k ) That is the tower cost V (a) at the starting point ₁ ,t _k ) (ii) a If the current sampling point a _x Is located at the starting point a ₁ Later, where N =2,3, \ 8230, and N, then the point goes to a _x The lowest erection cost value of is the tower cost V (a) at that point _x ,t _n ) The lowest cost Min (W (a)) of all towers before the point _i ,t _k ) ) is added.

And finally, outputting a corresponding tower position set and a corresponding tower position set by iterative repetition from the starting position to the end position, thereby obtaining an optimal line selection and position arrangement scheme.

Visualization (Visualization) is a theory, method and technology that data is converted into graphics or images and displayed on a screen by using computer graphics and image processing technology, and interactive processing is performed. The method relates to a plurality of fields of computer graphics, image processing, computer vision, computer aided design and the like, and becomes an integrated technology for researching a series of problems such as data representation, data processing, decision analysis and the like. The virtual reality technology which is rapidly developing at present is also based on the visualization technology of graphic images.

Visualization technology was first applied in computer science, and forms an important branch of Visualization technology, namely Visualization in Scientific Computing. Scientific computational visualization enables scientific data, including measured values, images or digital information involved in, generated from, or generated from computations, to be visualized, represented as graphical image information, and time and space varying physical phenomena or quantities to be presented to researchers for their observation, simulation and computation.

In this embodiment, only three-dimensional visualization is adopted to display the route selection and position arrangement scheme, and the three-dimensional visualization technology is not improved, belongs to the prior art, and is not described in detail herein.

The embodiment of the application provides a Web-end-based power transmission line route selection and arrangement and visualization method, which comprises the steps of calculating the specific load of a power transmission line path by obtaining the power transmission line path, determining the stress and sag of the power transmission line path, ensuring that the route selection and arrangement of the power transmission line path fully considers the external meteorology, setting a necessary tower erection section and a prohibited tower erection section of the power transmission line path, determining a tower set of the power transmission line path according to the necessary tower erection section and the prohibited tower erection section, ensuring that the tower arrangement of the power transmission line path fully considers the geological conditions, and determining a route selection and arrangement scheme of the power transmission line path according to the tower set, the stress and the sag.

Fig. 2 is a flowchart illustrating an implementation of the method for line selection, ranking and visualization of the power transmission line based on the Web terminal according to the second embodiment of the present application, and fig. 3 is a flowchart illustrating a specific operation, wherein reference is made to the first embodiment of the present application for a specific algorithm for generating the steps of path planning and tower ranking of the power transmission line:

in step 201, file creation and data resource uploading are performed.

And acquiring a server template file creation project comprising system template files such as PRJ, PRK and the like through a data interface, and transferring the project to a target folder at the back end so as to acquire access. Meanwhile, the original system files such as PRJ, PRK and the like can be directly uploaded to the server, and the content can be read through the interface. And uploading the resource file to be processed, such as a DEM (digital elevation model) related file and a corner coordinate point file required by the generated section, to be processed subsequently.

In step 202, a flat section map is generated.

And extracting section information from the uploaded DEM resource file according to the corner information and generating an MAP file, wherein the MAP file can set the section interval, the starting point, the ending point and the section type as required, and the generated MAP file is read to a browser for display. For subsequent rod arrangement on the cross section and drawing on the drawing surface.

In step 203, parameters are adjusted.

Design and display related parameters can be adjusted according to engineering requirements to control graphic display, so that the drawing effect consistent with that of an original desktop system is achieved. The modified parameters are interactively stored to a file through front-end data and back-end data, and can be used for reproduction and reuse of an original system.

In step 204, the tower coordination set-up.

The method can realize real-time drawing and display on the drawing surface through the capture of a mouse on the drawing surface position and the conversion of data coordinates based on the section drawing, and display the current position information through a tower data information window so as to obtain the current tower basic information. The drawing process calculates related parameters at the same time and displays the parameters as data labels on a drawing surface for checking whether the parameters meet the design requirements. The ranking result synchronizes the ranking result table and the data file.

In step 205, a plot is made across the surface feature.

The crossing ground features can be drawn manually on the drawing surface and are endowed with corresponding ground feature information. And the coordinates of the surface feature nodes and the related information are subjected to coordinate transformation and processing, and are stored and transmitted as a part of MAP data to generate a file corresponding to an original system.

In step 206, the outcome file is exported.

The data displayed in the browser stores the transferred data information into target files through a back-end data interface, and files such as PRJ, PRK, MAP, PWF and the like which can be used in the original system can be exported and downloaded at the browser end.

The minimum configuration requirement of the hardware required in this embodiment is as follows:

table 1 for server

Table 2 for client

Hardware	Parameter(s)
		Processor with a memory for storing a plurality of data	I7, 8-nuclear, 1.8GHz
Memory device	8G and above
		Hard disk	500G
Network card	10MB Ethernet port
		Display card	Independent display card and 8G video memory
Operating system	Win7、Win10

For the general architecture in this embodiment, see fig. 4 for details. The system is implemented by a Web application with a front end and a back end separated. Compared with a C/S framework and a B/S framework, the method has wider application range, greatly simplifies the client side in the processing mode, and enables the user to install a browser only and centralize the application logic on the server to enable each part to finish related services. On the aspect of software universality, a client of the B/S architecture has better universality and has smaller dependence on an application environment. And the front-end and back-end separation transfers the data processing pressure of a part of servers to the front end, and all parts of the system can cooperate more reasonably through JSON + AJAX interaction of necessary data.

The main modules of the system comprise an engineering management module, a parameter editing module, a graphic display interaction module, a tower ranking module, a cross-domain ground object drawing module and a data generation and export module, and are shown in detail in figure 5.

The project management module is used for managing project files and resource files existing at the server side of a user, calling for the use of the user and completing uploading and downloading of the project data resource files.

And the parameter editing module is used for changing the effect of the adjustable graph display of the map sheet and the picture frame parameters, simultaneously used for the proportion control and the coordinate conversion generated by the map sheet file, and used for calculating the tower height and the catenary data of the drawn tower to influence the graph display of the tower and the catenary.

The graph display interaction module is used for providing a relatively complete graph interaction function to control the display of a graph in order to facilitate the operation on the graph, realizing the basic functions of translation, zooming and the like of the graph by monitoring a mouse event, simultaneously converting screen coordinates to graph coordinate display coordinate information to support the operation on the graph, providing capture and display of specific node information and providing information overview.

And the tower ranking module is used for performing tower ranking on the basis of the graph by utilizing the extracted sections and the corner points, supporting operations such as adding, deleting, inserting, changing, rising, lowering and the like of the tower, dynamically displaying the process through the graph, and displaying tower information through the information window. The tower span information will be displayed above the tower for reference.

And the cross-domain ground object drawing module is used for directly drawing corresponding data on the drawing surface in a drawing form by utilizing the cross-domain ground object information, returning the data to the file generation, and providing a function of highly modifying the cross-node.

And the data generating and exporting module is used for storing the drawn data information into related files including engineering files, parameter files, rodding result files and the like for the original desktop system, and simultaneously generating and exporting other related result files through the existing files.

Js graphics library is adopted for graphics rendering, the requirement for graphics rendering and rendering can be conveniently supported, the relatively finished graphics style generation is provided, the style attribute of the graphics can be relatively conveniently controlled, and the conversion from data to the graphics can be relatively well finished. Meanwhile, the self-built shape is supported, and the graph with the required pattern is convenient to build. In addition, the method can add information to the graph in a mode of grouping the graph and the like so as to facilitate grouping management operation on the graph, and ray capture can provide support for capturing the graph and capturing the position of the graph and is a relatively universal Web graph library.

JNA is adopted in a unified file format with the original desktop software, consistency and universality of files of a Web system and an original desktop system need to be guaranteed due to exchange requirements of system files, a generated file of Web needs to be reused in the original system, and the original system file can be opened in Web. The data read-write of the original system and the arrangement, rewriting and packaging of the related data structure codes into a new read-write interface are considered to facilitate external reading and use, the interface is arranged and reorganized into a data organization form of a return result, and finally, the program interface is packaged into dll for calling according to the requirements corresponding to the JAVA and C data types. The JNA provides a group of Java tool classes for dynamically accessing a local library (dll of Windows, for example) of the system in a running period, and automatically realizes the mapping from a Java interface to a native function by describing the function and the structure of a target native library in the Java interface. By the method, forward and reverse conversion from Web transmission data to the original system file is realized, and a uniform file format is realized.

JSON is adopted in data exchange, the JSON is a mainstream data exchange format at present, the syntax is simple, the redundancy is low, the multi-serialization deserialization of the language supporting the JSON is simple, the JSON can be directly used by combining with the AJAX technology under a Web scene, and the data information is more conveniently transmitted at the front end and the back end. And the JSON can be used for better restoring each data structure of the original system, so that the data can have better data integrity and consistency. In addition, JSON serialization deserialization interfaces of different languages can facilitate conversion from different languages to unified data results, and the data conversion accuracy can be improved by utilizing the interfaces to carry out standardized processing.

For the present application, the three methods belong to the prior art, and are not described in detail herein.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The following are apparatus embodiments of the present application, and for details not described in detail therein, reference may be made to the corresponding method embodiments described above.

Fig. 6 shows a schematic structural diagram of a power transmission line selection, ranking and visualization device based on a Web end according to an embodiment of the present application, and for convenience of description, only a part related to the embodiment of the present application is shown, which is detailed as follows:

as shown in fig. 6, the power transmission line selection ranking and visualization device 6 based on the Web end includes: .

An obtaining module 61, configured to obtain a power transmission line path;

a specific load calculation module 62, configured to calculate a specific load of the power transmission line path according to the power transmission line path;

the stress sag module 63 is used for determining the stress and sag of the power transmission line path according to the specific load;

the tower assembly module 64 is used for setting a necessary tower erection section and a prohibited tower erection section of the power transmission line path, and determining a tower assembly of the power transmission line path according to the necessary tower erection section and the prohibited tower erection section;

and the determining module 65 is configured to determine a line selection and placement scheme of the power transmission line path according to the pole and tower set, the stress and the sag, and visualize the line selection and placement scheme at the Web end.

The embodiment of the application provides a Web-end-based power transmission line selection and placement and visualization device, the specific load of a power transmission line path is calculated by obtaining the power transmission line path, the stress and sag of the power transmission line path are determined, the power transmission line selection and placement of the power transmission line path are ensured to fully consider external meteorology, a necessary tower erection section and a prohibited tower erection section of the power transmission line path are set, a tower set of the power transmission line path is determined according to the necessary tower erection section and the prohibited tower erection section, the tower placement of the power transmission line path is ensured to fully consider geological conditions, and a line selection and placement scheme of the power transmission line path is determined according to the tower set, the power transmission line selection and tower placement of the power transmission line path are ensured to fully meet the requirements of the external meteorology and geological conditions, so that the designed line selection and placement of the whole power transmission line is matched with actual requirements, and the line selection and placement of the power transmission line path are more accurate.

In one possible implementation manner, the obtaining module is configured to:

and acquiring the path of the power transmission line according to the plane section diagram.

In one possible implementation, the calculate load module is configured to:

the specific load of the power transmission line path comprises a dead weight specific load, an ice weight specific load, a dead weight and ice coating specific load, a wind pressure specific load without ice coating, a wind pressure specific load with ice coating and a comprehensive specific load, wherein the comprehensive specific load comprises a wind comprehensive specific load without ice coating and a wind comprehensive specific load with ice coating;

Wherein, g _1,1 K is the wind integrated specific load when there is no ice coating ₁ Is the coefficient of wind integrated specific load g when there is no ice coating ₀ G is specific gravity load ₃ The wind pressure specific load is when no ice coating exists;

Wherein, g _1,2 K is the wind combined specific load when ice is coated ₂ G is the coefficient of wind comprehensive specific load when ice is coated ₂ Specific load of self weight and ice coating, g ₄ The specific load of wind pressure is when there is icing.

In one possible implementation, the calculate load module is further configured to:

determining the critical span of the transmission line path by a third formula

Wherein l _m Is the critical span, sigma, of the transmission line path ₁ And σ ₂ Is the stress of the wire in different states, t ₁ And t ₂ Air temperature in different states, g ₁ And g ₂ The specific load of the lead in different states, a is the elastic elongation coefficient of the lead, and b is the linear temperature expansion coefficient of the lead;

determining the critical temperature of the transmission line path by a fourth formula

Wherein, t _m Is the critical temperature, t, of the transmission line path ₂ Temperature under specific load of self-weight and ice coating, σ ₂ Stress under dead weight and specific load of ice coating, g ₀ G is specific gravity load ₂ The specific load is the self weight and the ice coating.

In one possible implementation, the stress sag module is configured to:

wherein the state equation under meteorological condition control comprises a state equation under the control of the meteorological condition of lowest air temperature, maximum wind speed or ice coating and a state equation under the meteorological control condition of annual average air temperature;

determining the sag of the power transmission line path by a sixth formula

Wherein f is the sag of the transmission line path.

In one possible implementation, the tower aggregation module is configured to:

In one possible implementation, the determining module is configured to:

calculating the cost of the transmission line path according to the tower set;

according to the stress and the sag, the cost of the power transmission line path is restrained to obtain the lowest cost of the power transmission line path;

Fig. 7 is a schematic diagram of a terminal according to an embodiment of the present application. As shown in fig. 7, the terminal 7 of this embodiment includes: a processor 70, a memory 71 and a computer program 72 stored in said memory 71 and executable on said processor 70. When the processor 70 executes the computer program 72, the steps in each of the above embodiments of the method for selecting and ranking power transmission lines and visualizing based on the Web side, such as the steps 101 to 105 shown in fig. 1, are implemented. Alternatively, the processor 70, when executing the computer program 72, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 61 to 65 shown in fig. 6.

Illustratively, the computer program 72 may be partitioned into one or more modules/units, which are stored in the memory 71 and executed by the processor 70 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 72 in the terminal 7. For example, the computer program 72 may be divided into the modules 61 to 65 shown in fig. 6.

The terminal 7 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal 7 may include, but is not limited to, a processor 70, a memory 71. It will be appreciated by those skilled in the art that fig. 7 is only an example of a terminal 7 and does not constitute a limitation of the terminal 7, and may include more or less components than those shown, or some components may be combined, or different components, for example, the terminal may also include input output devices, network access devices, buses, etc.

The Processor 70 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 71 may be an internal storage unit of the terminal 7, such as a hard disk or a memory of the terminal 7. The memory 71 may also be an external storage device of the terminal 7, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like provided on the terminal 7. Further, the memory 71 may also include both an internal storage unit and an external storage device of the terminal 7. The memory 71 is used for storing the computer program and other programs and data required by the terminal. The memory 71 may also be used to temporarily store data that has been output or is to be output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.

In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one type of logical function division, and other division manners may exist in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated module/unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the above embodiments may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the foregoing power transmission line selection and placement and visualization method embodiments based on the Web end may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.

Claims

1. A power transmission line selection ranking and visualization method based on a Web end is characterized by comprising the following steps:

acquiring a power transmission line path;

2. The Web-end-based power transmission line selection ranking and visualization method according to claim 1, wherein the obtaining of the power transmission line path includes:

3. The Web-end-based power transmission line route selection and ranking and visualization method are characterized in that the specific load of the power transmission line path comprises a self-weight specific load, an ice-weight specific load, a self-weight-to-ice-coating specific load, a wind-pressure specific load without ice coating, a wind-pressure specific load with ice coating and a comprehensive specific load, wherein the comprehensive specific load comprises a wind comprehensive specific load without ice coating and a wind comprehensive specific load with ice coating;

Wherein, g _1，1 K is the wind integrated specific load when the ice coating is not applied ₁ Is the coefficient of the wind integrated specific load g when the ice coating is not applied ₀ Is the specific weight of g ₃ The wind pressure specific load is the wind pressure specific load when the ice coating is not carried out;

Wherein, g _1，2 K is the wind integrated specific load when the ice is coated ₂ Is the coefficient of wind integrated specific load g when there is ice coating ₂ G is the specific load of the dead weight and the ice coating ₄ The specific load of the wind pressure when the ice coating exists.

4. The Web-end-based power transmission line selection ranking and visualization method according to claim 3, wherein the determining the stress and sag of the power transmission line path according to the specific load comprises:

and determining the stress and sag of the power transmission line path according to the critical span and the critical temperature.

5. The Web-based power transmission line selection ranking and visualization method according to claim 4, wherein the critical span of the power transmission line path is determined by a third formula, the third formula being

Wherein, t _m Is the critical temperature, t, of the transmission line path ₂ Is the temperature under the dead weight and ice coating ratio, σ ₂ Stress under the specific load of the self-weight and the ice coating, g ₀ To the specific weight, g ₂ The self weight and the ice coating specific load are obtained;

the stress of the power transmission line path is expressed by a state equation under the control of meteorological conditions, the state equation under the control of the meteorological conditions is expressed by a fifth formula, and the fifth formula is

Wherein σ is the stress of the power transmission line path, l is the span of the power transmission line path, and σ _i For the stress under control of said meteorological conditions, g _i Specific load under control of said meteorological conditions, t _i The temperature is controlled under the meteorological conditions;

determining the sag of the power transmission line path through a sixth formula which is

And f is the sag of the power transmission line path.

6. The Web-based power transmission line route selection, ranking and visualization method according to claim 1, wherein the setting of the section in which the power transmission line path must be erected and the section in which the erection of the tower is prohibited, and the determining of the tower set of the power transmission line path according to the section in which the power transmission line path must be erected and the section in which the erection of the tower is prohibited, comprises:

7. The method according to claim 6, wherein the step of determining the line selection and placement scheme of the power transmission line path according to the tower set, the stress and the sag and the step of visualizing the line selection and placement scheme at the Web end comprises the steps of:

calculating the cost of the transmission line path according to the tower set;

and performing visualization at the Web end according to the route selection and position arrangement scheme.

8. The utility model provides a transmission line selection ranking and visual device based on Web end which characterized in that includes:

the acquisition module is used for acquiring a power transmission line path;

the load-specific calculation module is used for calculating the load-specific of the power transmission line path according to the power transmission line path;

9. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of the method for line selection and visualization of a Web-based power transmission line according to any one of claims 1 to 7.

10. A computer-readable storage medium, in which a computer program is stored, and the computer program, when being executed by a processor, implements the steps of the method for line selection and visualization of a Web-based power transmission line according to any one of claims 1 to 7.