CN105953762A - Power transmission line modeling method used for net distance measurement and distance measurement device thereof - Google Patents

Abstract

The invention discloses a power transmission line modeling method used for net distance measurement and a distance measurement device thereof. The modeling method comprises the following steps that 1) the distance measurement device is installed below a suspension string, an endpoint O is determined, an auxiliary distance measurement device is installed on a lead to be measured, two endpoints A and B are determined through movement of the auxiliary distance measurement device, and length L1 of a line segment OA, length L2 of a line segment OB, an inclined angle theta1 between the line segment OA and the horizontal plane and an inclined angle theta2 of the line segment OB and the horizontal plane are respectively measured; 2) a rectangular plane coordinate system with the point O acting as the origin of coordinates is established, and the coordinates of point A and the coordinates of point B are substituted into a parabolic model formula y=x2+mx+n of the lead to be measured so that parameters m and n are obtained; and 3) the auxiliary distance measurement device acquires position information of the lead to be measured and forms the position information and the parameters m and n of the parabolic model into a data frame to be wirelessly transmitted to a remote server. According to the method, the modeling process is simplified, the working efficiency is high and the operating risk is low.

Description

A transmission line modeling method and distance measuring device for headroom distance measurement

technical field

The invention relates to a modeling method for an overhead transmission line, in particular to a method for simulating the sag distribution of the transmission line curve and measuring the clearance distance of crossing objects under the line.

Background technique

The transmission line has strict data requirements for the clearance distance of the crossing objects below. The sag of different points on the line is different, and the clearance distance of the crossing objects below is also different. Existing measuring method is to measure distance with total station, calculate after angle measurement or use volume, 100-meter rope, heavy hammer to measure for high-altitude workers. Using a total station measurement, the measurement accuracy of the clearance distance depends on the measurement accuracy of the horizontal distance from the setting point to the crossing point, but it is difficult to accurately locate the crossing point; the measurement of high-altitude personnel has high operational risks and is affected by weather conditions. The existing wireless measurement method for the headroom distance of transmission lines needs to establish the catenary model equation of the transmission line. This method has complex algorithms and is only used as a theoretical model. This modeling method is rarely used in practical applications, and its practicability is not strong.

Contents of the invention

The purpose of the present invention is to provide a transmission line modeling method and a distance measuring device for measuring the clearance distance, which simulates the parabolic model of the wire to accurately calculate the clearance distance between any wire and the spanning object.

To achieve the above object, the present invention adopts the following technical solutions:

A transmission line modeling method for headroom distance measurement, comprising the following steps:

1), install a distance measuring device on one of the two adjacent tower poles connected to the wire to be tested, as the endpoint O of the measurement distance, install an auxiliary distance measuring device on the wire to be measured, and the auxiliary measuring device starts from the starting position at Carry out a movement on the wire to be tested, determine the two endpoints A and B at two positions successively, measure the length L1 of the line segment OA and the length L2 of the line segment OB, the angle θ ₁ between the line segment OA and the horizontal plane, and the angle θ ₂ between the line segment OB and the horizontal plane;

2), establish the plane Cartesian coordinate system with point O as the coordinate origin, substitute the coordinates of the determined end point A and the end point B into the parabolic model formula y=x ² +mx+n of the wire to be measured, and calculate the parameter m , n;

3), the distance measuring device collects the longitude and latitude information of the geographical location of the wire to be measured, and the distance measuring device forms a data frame with the longitude and latitude information of the geographic location and the obtained parameters m and n of the parabolic model formula of the wire to be measured, and sends it to the remote via wireless server.

Further, step 1) comprises the following steps:

11), a distance measuring device is installed on one of the two adjacent tower rods connected to the wire to be measured, and the distance measuring device is installed at the wire hanging point at the lower end of the suspension string as the endpoint O of the measuring distance;

12), install the auxiliary distance measuring device on the wire to be tested, and the point where the auxiliary distance measuring device is located on the wire to be measured is used as the endpoint A of the measurement distance;

13), the auxiliary distance measuring device moves on the wire to be measured to any point position different from the end point A, and the point where the auxiliary distance measuring device is located is marked as the end point B;

14) The distance measuring device respectively measures the length L ₁ of the line segment formed by the endpoint O and the endpoint A, the length L ₂ of the line segment formed by the endpoint O and the endpoint B, the angle θ ₁ between the line segment OA and the horizontal plane, and the distance between the line segment OB and the horizontal plane. Angle θ ₂ .

Further, step 2) comprises the following steps:

The distance measuring device takes point O as the coordinate origin to establish a plane Cartesian coordinate system within the plane α of the wire to be measured, and the coordinates of point A (L ₁ *cosθ ₁ , -L ₁ *sinθ ₁ ), the coordinates of point B (L ₂ *cosθ ₂ , -L ₂ *sinθ ₂ ) into, solve the parabolic model formula y=x2+mx+n of the wire to be tested on the plane α, calculate the parameters m, n, then any point x ₀ on the wire can be Accurate calculation.

A transmission line modeling auxiliary distance measuring device for clear distance measurement, including a housing, a fixed module moving on the wire to be measured and a control module located inside the housing, the fixed module and the housing are fixedly installed, and the control module includes a micro-controller device, inclination sensor, power supply module, GPRS wireless communication module, GPS module and power supply module, the microcontroller is connected with the inclination sensor, power supply module, GPRS wireless communication module and GPS module respectively, and the power supply module includes the wires which are electrically connected in sequence to take power by induction The unit, the rectifier unit, the pulse width modulation unit, the voltage sampling unit, and the wire induction power-taking unit are connected to the secondary coil hung on the wire to be tested and wound on the openable and closed ring core.

The beneficial effect of the present invention is,

The present invention installs the distance measuring device at the wire suspension point at the lower end of the suspension string, determines the end point O, installs the auxiliary distance measuring device on the wire to be measured, starts to move from the initial position, and moves to a point different from the initial position, respectively Determine the endpoint A and endpoint B, respectively measure the length of the line segment OA, the length of the line segment OB, the angle between the line segment OA and the horizontal plane, the angle between the line segment OB and the horizontal plane, and realize the parabolic modeling of the sag of the conductor to be tested. The established parabola Model parameters and location parameters are sent to the server through wireless, not only can accurately calculate the sag of each point on the wire, but also establish a real-time mathematical model of the wire to be tested, and the collected location information is convenient for engineers to locate in time. Compared with establishing the catenary equation model of the conductor to be tested, the modeling process is simplified, which has better engineering practical value, and realizes the accurate calculation of the clearance distance of crossings under the line, with accurate data, high work efficiency and low operation risk .

Description of drawings

Fig. 1 is a schematic diagram of the measurement structure of the clearance distance of the transmission line;

Fig. 2 is a schematic structural diagram of the control module of the transmission line modeling auxiliary ranging device for measuring the clearance distance.

detailed description

As shown in Figure 1, the wires to be measured are connected between two adjacent tower poles, and the distance measuring device is installed at the wire suspension at the lower end of the suspension string. On the wire to be tested, move from the starting position to a point different from the starting position, and determine the end point A and the end point B respectively.

As shown in Figure 2, a transmission line modeling auxiliary distance measuring device for headroom distance measurement includes a housing, a fixed module that moves on the wire to be tested and a control module located inside the housing, and the fixed module is fixedly installed with the housing The control module includes a microcontroller, an inclination sensor, a power module, a GPRS wireless communication module, a GPS module and a power module. The microcontroller is connected to the inclination sensor, a power module, a GPRS wireless communication module and a GPS module respectively. The connected wire induction power-taking unit, rectifier unit, pulse width modulation unit, voltage sampling unit, the wire induction power-taking unit is connected to the secondary coil that is hung on the wire to be tested and wound on the openable and closed ring core .

A transmission line modeling method for headroom distance measurement, comprising the following steps:

1), a distance measuring device is installed on one of the two adjacent tower rods connected to the wire to be measured, and the distance measuring device is installed at the wire hanging point at the lower end of the suspension string as the endpoint O of the measurement distance;

2), install the auxiliary distance measuring device on the wire to be tested, and the point where the auxiliary distance measuring device is located on the wire to be measured is used as the endpoint A of the measurement distance;

3), the auxiliary distance measuring device moves on the wire to be measured to any point position different from the end point A, and the point where the auxiliary distance measuring device is located is marked as the end point B;

4) The distance measuring device respectively measures the length L ₁ of the line segment formed by the endpoint O and the endpoint A, the length L ₂ of the line segment formed by the endpoint O and the endpoint B, the angle θ ₁ between the line segment OA and the horizontal plane, and the distance between the line segment OB and the horizontal plane. Angle θ ₂ ;

5), the distance measuring device takes point O as the coordinate origin to establish a plane Cartesian coordinate system within the plane α of the wire to be measured, and the coordinates of point A (L ₁ *cosθ ₁ , -L ₁ *sinθ ₁ ), the coordinates of point B (L ₂ *cosθ ₂ , -L ₂ *sinθ ₂ ) are substituted in to solve the parabolic model formula y=x ² +mx+n of the wire to be tested on the plane α, and the parameters m and n are calculated, then any point x ₀ on the wire is The distance across objects can be accurately calculated;

6), the auxiliary ranging device collects the longitude and latitude information of the geographic location of the wire to be measured, and the distance measuring device forms a data frame with the longitude and latitude information of the geographic location and the obtained parameters m and n of the parabolic model formula of the wire to be measured, and sends it wirelessly to remote server.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (4)

1. A transmission line modeling method for headroom distance measurement, is characterized in that, comprises the following steps: 1), install a distance measuring device on one of the two adjacent tower poles connected to the wire to be tested, as the endpoint O of the measurement distance, install an auxiliary distance measuring device on the wire to be measured, and the auxiliary measuring device starts from the starting position at Carry out a movement on the wire to be tested, determine the two endpoints A and B at two positions successively, measure the length L1 of the line segment OA and the length L2 of the line segment OB, the angle θ ₁ between the line segment OA and the horizontal plane, and the angle θ ₂ between the line segment OB and the horizontal plane; 2), establish the plane Cartesian coordinate system with point O as the coordinate origin, substitute the coordinates of the determined end point A and the end point B into the parabolic model formula y=x ² +mx+n of the wire to be measured, and calculate the parameter m , n; 3), the distance measuring device collects the longitude and latitude information of the geographical location of the wire to be measured, and the distance measuring device forms a data frame with the longitude and latitude information of the geographic location and the obtained parameters m and n of the parabolic model formula of the wire to be measured, and sends it to the remote via wireless server. 2. a kind of transmission line modeling method for clearance distance measurement as claimed in claim 1, is characterized in that, step 1) comprises the following steps: 11), a distance measuring device is installed on one of the two adjacent tower rods connected to the wire to be measured, and the distance measuring device is installed at the wire hanging point at the lower end of the suspension string as the endpoint O of the measuring distance; 12), install the auxiliary distance measuring device on the wire to be tested, and the point where the auxiliary distance measuring device is located on the wire to be measured is used as the endpoint A of the measurement distance; 13), the auxiliary distance measuring device moves on the wire to be measured to any point position different from the end point A, and the point where the auxiliary distance measuring device is located is marked as the end point B; 14) The distance measuring device respectively measures the length L ₁ of the line segment formed by the endpoint O and the endpoint A, the length L ₂ of the line segment formed by the endpoint O and the endpoint B, the angle θ ₁ between the line segment OA and the horizontal plane, and the distance between the line segment OB and the horizontal plane. Angle θ ₂ . 3. a kind of transmission line modeling method for clearance distance measurement as claimed in claim 1, is characterized in that, step 2) comprises the following steps: The distance measuring device takes point O as the coordinate origin to establish a plane Cartesian coordinate system within the plane α of the wire to be measured, and the coordinates of point A (L ₁ *cosθ ₁ , -L ₁ *sinθ ₁ ), the coordinates of point B (L ₂ *cosθ ₂ , -L ₂ *sinθ ₂ ) into, solve the parabolic model formula y=x ² +mx+n of the wire to be measured on the plane α, and calculate the parameters m, n, then the distance between any point x ₀ on the wire and the crossing object can be calculated accurately. 4. A transmission line modeling auxiliary distance measuring device for headroom distance measurement, characterized in that it includes a housing, a fixed module moving on the wire to be measured and a control module located inside the housing, the fixed module and the housing are fixedly installed The control module includes a microcontroller, an inclination sensor, a power module, a GPRS wireless communication module, a GPS module and a power module. The microcontroller is connected to the inclination sensor, a power module, a GPRS wireless communication module and a GPS module respectively. The connected wire induction power-taking unit, rectifier unit, pulse width modulation unit, voltage sampling unit, the wire induction power-taking unit is connected to the secondary coil that is hung on the wire to be tested and wound on the openable and closed ring core .